- Faculty of Environmental Engineering
- Faculty Departments
- Department of Building Energetics
Department of Building Energetics
This is a nationally leading specialised academic unit that prepares engineers to develop, evaluate, and manage energy-efficient and sustainable buildings and building engineering systems.
About the Department
Department Activity Areas
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Direct collaboration with industry and strong labour market demand for graduates.
The Department maintains active cooperation with leading companies in Lithuania and internationally.The Department maintains active cooperation with leading companies in Lithuania and abroad operating in heating, ventilation, cooling, heat and gas supply, and renewable energy systems. Its partners include design, manufacturing, and maintenance companies, ministries, agencies, and related institutions. Graduates of the Department are highly valued in the labour market, as evidenced by scholarships awarded by three major companies to the best-performing students. Students gain hands-on experience during their studies and frequently begin their professional careers before graduation.
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Advanced Building and Energy Systems Laboratories
The Department has modern laboratories for student and researcher experiments.The Department operates modern laboratories that enable experimental work with real building microclimate systems. Research and educational studies are carried out using thermography, digital twins, and computer modelling, supporting the development of innovative solutions to enhance the efficiency of energy transformation, supply, and consumption.
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International visibility and participation in European projects
The Department’s academic staff and researchers actively participate in international and national research and innovation projects.Academic staff and researchers of the Department are actively engaged in Horizon Europe, COST, LIFE, and other international and national research and innovation programmes. Students are integrated into research groups, where they gain practical experience, develop expertise, and build professional networks at an international level.
Building Energy and Microclimate Systems Laboratory
This laboratory belongs to the Department of Building Energy Engineering.
The BEMS Laboratory researches, develops, and applies solutions for building energy supply, as well as energy consumption systems and processes. Its research contributes to sustainable energy use and the development of modern buildings.
About the Laboratory
Goals
- Providing research and knowledge dissemination services on building energy performance, energy efficiency, and indoor microclimate quality;
- Researching and implementing renewable energy integration solutions in building energy systems;
- Assessing the life cycle and thermodynamic performance of building energy supply and consumption systems;
- Integrating, modelling, and planning building energy supply and use systems and processes.
Services
The laboratory’s services are listed below.
Modelling of energy converters and systems
TRNSYS 17.0 (building microclimate and energy demand), DesignBuilder (interaction between building envelope elements, systems, microclimate, and energy demand), Polysun (processes in solar energy converters and their systems), EnergyPro (regional/area energy supply, particularly co- and trigeneration), PHPP (supporting design software for the Passive House standard), SimaPro (life cycle assessment), HEAT2/HEAT3 (two- and three-dimensional transient heat transfer), and PHOENICS (computational fluid dynamics).
Technical feasibility assessment of the integration of renewable energy sources in buildings.
The research covers the use of renewable energy sources such as solar, wind, geothermal energy, biofuels, and others to meet building energy needs. The work includes analysis of current building energy demand, which allows energy and capacity balances to be established. A technical assessment of renewable energy integration is carried out, conceptual technical solutions are proposed, and economic and environmental evaluations of the suggested alternatives are performed. The search for financial support for selected implementation options is also undertaken at national and EU levels.
Building energy audit with on-site measurement of actual energy parameters.
A building energy audit includes assessment of the technical condition of the building envelope and engineering systems, analysis of energy consumption, and energy normalisation calculations. On-site measurements are carried out using thermography, thermal resistance testing, and airtightness analysis. A calibrated energy model is created based on measured and historical energy data. Energy-saving measures are proposed, and their economic feasibility is evaluated. Specialists may also participate in ESCO projects and provide concept development and technical and economic assessment of heat sources and integrated solutions.
Energy planning: preparation of district heating development plans and feasibility studies for energy supply in residential areas.
Specialists develop territorial heating plans and conduct feasibility studies on sustainable energy supply for settlements, focusing on renewable energy development and environmental impact reduction. They also prepare documentation required for project funding.
The Centre works with responsible real estate developers planning energy-efficient residential areas. The Department offers consultancy at the design stage, support in joining EU demonstration programmes, and assistance in preparing funding applications.
Building thermographic analysis and measurement of the actual thermal resistance of building envelope elements.
Thermographic analysis of thermal structures using images (photographs) and dynamic processes in video format is carried out. The thermal performance of building envelope elements is assessed, and potential construction defects and specific problem areas are identified. Measurements of the actual thermal resistance of envelope elements are then performed in these areas. Conclusions are provided, and the results serve as a basis for defining defect remediation requirements.
Building or indoor microclimate assessment
In the assessed building, measurements are carried out of air and surface temperatures, relative humidity, CO₂ levels, airtightness, lighting, and noise. Ventilation airflow rates are also measured. The collected data are analysed, and conclusions are provided on possible solutions to identified problems.
Airtightness assessment of buildings or premises
A pressure test is performed in the building or room, with thermal imaging used to identify leakage areas. The air change rate at 50 Pa pressure difference is measured, and the results are used for building certification purposes.
Ventilation system assessment
Measurements of air velocity and duct pressure are performed to support the adjustment and balancing of ventilation systems.
Experimental studies of low-capacity heat transformers
These studies determine the seasonal energy efficiency of low-capacity (up to several tens of kW) energy converters, such as heat exchangers, heat pumps, refrigeration units, and boilers. The operating characteristics of these systems are analysed, and the impact of new components or equipment modifications on performance is assessed. Recommendations are provided to improve efficiency and optimise operating and energy transformation modes.
Contacts
Head of the Laboratory:
Dr. Dovydas Rimdžius
Phone: +370 5 251 2129
Email: dovydas.rimdzius@vilniustech.lt
Partners
Department of Building Energetics maintains active cooperation with social and business partners.
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Department Staff
The Department’s academic staff are recognised professionals with strong expertise in sustainability principles, integrating advanced technologies and teaching methods into their work. They are actively engaged in research and international projects and maintain close cooperation with the alumni community, which is involved in the study process. Lecturers are highly regarded by students for their teaching quality, professional competence, and constructive communication.
Administration
- Administration
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Prof. Dr. Violeta MotuzienėHead
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Dr. Dovydas RimdžiusHead of Laboratory(ies)
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Thesis abstracts
Years
Qualification
Clear selections
Abu Muhammad Mustakim Reza
— Assoc Prof Dr Juozas Bielskus
An Investigation of Sustainable Modernization Options for the Salininkai District Heating System
The aim of this Master's thesis is to evaluate the performance of the Salininkai District Heating Network (DHN) in Vilnius, Lithuania, and propose a transformation roadmap aligned with...
An Investigation of Sustainable Modernization Options for the Salininkai District Heating System
Student:
Abu Muhammad Mustakim Reza
Supervisor:
Assoc Prof Dr Juozas Bielskus
Department:
Department of Building Energetics
Thesis abstract (LT)
Šio magistro darbo tikslas – įvertinti Vilniaus Salininkų centralizuoto šilumos tiekimo (CŠT) tinklo efektyvumą ir pateikti transformacijos planą, pagrįstą ketvirtos kartos centralizuoto šilumos tiekimo principais. Tyrimas orientuotas į sistemos efektyvumo didinimą ir pirminės energijos vartojimo mažinimą tinkle, kuris aptarnauja 46 pastatus, kuriems šilumą tiekia du gamtinėmis dujomis kūrenami katilai, ir susiduria su tokiomis problemomis kaip šilumos perdavimo nuostoliai bei pasenusi infrastruktūra.
Naudojant EnergyPRO programinę įrangą, modeliuojami keli atnaujinimo scenarijai, įskaitant 1 MW galios oras–vanduo tipo elektrinio šilumos siurblio, didelio tūrio šilumos talpyklos bei vietinės saulės fotovoltinės elektrinės integravimą į sistemą. Taip pat nagrinėjami struktūriniai patobulinimai, tokie kaip šilumos šaltinių išdėstymo keitimas ir decentralizacijos strategijos. Siūlomi sprendimai vertinami pagal energijos poreikio ir nuostolių scenarijus, bendrą sistemos efektyvumą bei pirminės energijos faktoriaus (PEF) skaičiavimus. Galutinis vertinimas apima techninę ir ekonominę analizę, poveikio aplinkai vertinimą bei jautrumo analizę.
Tyrimas baigiamas strateginėmis rekomendacijomis, kaip Salininkų CŠT tinklą transformuoti į modernią, tvarią ir atsparią šildymo sistemą, galinčią tapti pavyzdžiu panašiems centralizuoto šilumos tiekimo tinklams šalto klimato Europos miestuose.
Darbas, be įvado, susideda iš septynių dalių: problemos ir aktualumo pristatymo bei suformulavimo, tvarios modernizacijos koncepcijos kūrimo, literatūros apžvalgos, metodologijos, rezultatų, diskusijos, išvadų bei rekomendacijų, ir bibliografinių šaltinių.
Darbą sudaro 100 puslapių pagrindinio teksto, 49 paveikslai, 7 lentelės, 8 lygtys ir 86 bibliografiniai šaltiniai. Priedas pateikiamas atskirai
Thesis abstract (EN)
The aim of this Master's thesis is to evaluate the performance of the Salininkai District Heating Network (DHN) in Vilnius, Lithuania, and propose a transformation roadmap aligned with 4th Generation District Heating (4GDH) principles. The study focuses on improving system efficiency and reducing primary energy consumption in a network serving 46 buildings with two natural gas-fired boilers, facing challenges such as heat transmission losses and outdated infrastructure.
Multiple upgrade scenarios are simulated using EnergyPRO, including the integration of 1 MW air-to-water electric heat pump, large-scale thermal energy storage, and on-site solar photovoltaic generation. Additionally, structural improvements such as repositioning of heat sources and decentralization strategies are explored. The proposed alternatives are evaluated through energy demand and loss scenarios, overall system efficiency, and primary energy factor (PEF) calculations and finally vetted by technical and economic evaluation, environmental impact assessment and sensitivity analysis.
The research concludes with strategic recommendations for transforming Salininkai DHN into a modern, sustainable, and resilient heating system, potentially serving as a model for similar urban heating networks in cold-climate European cities.
The work consists of 7 parts apart from introduction: relevance and articulation of problem statement, sustainable modernization concept development, literature review, methodology, results, discussion, conclusions followed by recommendation and references.
The thesis includes 100 pages of main text, 49 figures, 7 tables, 8 equations, and 86 bibliographic entries. The supplement is included separately.
Aurimas Gurskis
— Assoc Prof Dr Violeta Misevičiūtė
Indoor Climate Systems of an Administrative Building in Klaipėda
The Bachelor's thesis presents the design of heating, ventilation, and air conditioning (HVAC) systems for an administrative building in Klaipėda, focusing on meeting the requirements of the A++...
Indoor Climate Systems of an Administrative Building in Klaipėda
Student:
Aurimas Gurskis
Supervisor:
Assoc Prof Dr Violeta Misevičiūtė
Department:
Department of Building Energetics
Thesis abstract (LT)
Baigiamajame bakalauro darbe atliktas administracinės paskirties pastato Klaipėdoje šildymo, vėdinimo ir vėsinimo (ŠVOK) sistemų projektavimas, orientuotas į A++ energinio naudingumo klasės reikalavimų įgyvendinimą ir komfortiško mikroklimato užtikrinimą. Atsižvelgiant į pastato architektūrinius ir funkcinius sprendinius, suprojektuotos trys pagrindinės inžinerinės sistemos: šildymo sistema su plokštiniais radiatoriais ir grindiniu šildymu, mechaninė vėdinimo sistema su oro ruoštuvu ir rotaciniu šilumokaičiu bei vėsinimo sistema su šilumos siurbliu ir lubiniais ventiliatoriniais konvektoriais. Visos mikroklimato sistemos parinktos pagal efektyvumo, patikimumo ir eksploatacinių savybių kriterijus. Pritaikomas elektros energijos tiekimas iš nutolusios saulės elektrinės, užtikrinamas ne tik mikroklimato sistemų energetinis savarankiškumas, bet ir sumažinamas poveikis aplinkai. Baigiamajame darbe pagrindžiamas modernių inžinerinių sprendimų pritaikymas siekiant ilgalaikio tvarumo, aukštos energinės klasės ir komforto. Darbo pabaigoje pateikiamos išvados ir pasiūlymai.
Darbą sudaro 13 dalių: įvadas, baigiamojo darbo objektas, pastato statybos vietovės klimato duomenys, pastato konstrukcijų šiluminės charakteristikos, pastato projektinės šilumos galios, patalpų mikroklimatas ir jo palaikymo sistemos pastato projektinės vėsos apkrovos, būdingos patalpos mikroklimatui palaikyti reikalingų parametrų, oro kiekių, šildymo ir vėsinimo galių skaičiavimas, pastato inžinerinės mikroklimato palaikymo sistemos, ekonominis vertinimas ir AE šaltinio parinkimas išvados ir siūlymai, literatūros sąrašas, priedai.
Darbo apimtis – 70 p. teksto be priedų, 56 iliustr., 26 lent., 25 bibliografiniai šaltiniai.
Atskirai pridedami: 9 darbo priedai ir 14 brėžinių.
Thesis abstract (EN)
The Bachelor's thesis presents the design of heating, ventilation, and air conditioning (HVAC) systems for an administrative building in Klaipėda, focusing on meeting the requirements of the A++ energy efficiency class and ensuring a comfortable indoor microclimate. Based on the architectural and functional design of the building, three main engineering systems were designed: a heating system with panel radiators and underfloor heating, a mechanical ventilation system with an air handling unit and rotary heat exchanger, and a cooling system with a heat pump and ceiling-mounted fan coil units. All microclimate systems were selected according to criteria of efficiency, reliability, and operational performance. Electricity is supplied from a remote solar power plant, ensuring not only the energy independence of the microclimate systems but also reducing environmental impact. The thesis justifies the use of modern engineering solutions to achieve long-term sustainability, high energy efficiency, and indoor comfort. Conclusions and recommendations are provided at the end of the work.
The thesis consists of 13 parts: introduction, object of the final thesis, climatic data of the building site, thermal characteristics of the building structures, design heat load of the building, indoor microclimate and its maintenance systems, design cooling load of the building, key parameters for maintaining the microclimate of a typical room, calculation of air volumes and heating and cooling capacities, engineering systems for indoor climate maintenance, economic evaluation and selection of the energy source, conclusions and recommendations, list of references, and appendices.
The written part includes 70 pages (excluding appendices), 56 illustrations, 26 tables, and 25 bibliographic sources.
Separately attached: 9 appendices and 14 technical drawings.
Darijus Sinkevič
— Dr Rūta Mikučionienė
Analysis of the Impact of Thermal Bridges for Energy Performance Class of Renovated Multi-apartment Buildings
In the master thesis the balcony assemblies of old-built apartment blocks and their impact on the energy performance of buildings are analysed. The aim of the study is...
Analysis of the Impact of Thermal Bridges for Energy Performance Class of Renovated Multi-apartment Buildings
Student:
Darijus Sinkevič
Supervisor:
Dr Rūta Mikučionienė
Department:
Department of Building Energetics
Thesis abstract (LT)
Magistro baigiamajame darbe analizuojami senos statybos daugiabučių balkonų mazgai ir jų šiluminių tiltelių įtaka pastatų energiniam naudingumui. Tyrimo tikslas – pateikti konstrukcinius balkonų mazgų sprendinius, leidžiančius pasiekti A energinio naudingumo klasę. Naudojantis THERM programine įranga buvo modeliuojami ir analizuojami įvairūs mazgų variantai: tiek nerenovuoti (įstiklinti ir atviri balkonai), tiek renovuoti (su papildoma termoizoliacija, metaliniu balkonu, šalčio nutraukimo detale, šiltinimu akmens vata). Įvertinus šilumos perdavimo koeficientus ir šilumos srautų pasiskirstymą, nustatyta, kad efektyviausias sprendimas yra balkonas, apšiltintas akmens vata – jo šilumos perdavimo koeficientas buvo mažiausias. Darbo rezultatai parodo šiluminių tiltelių mažinimo svarbą pastatų renovacijoje ir įvertina kaip ši problema pasireiškia Lietuvos klimato sąlygomis.
Darbo apimtis – 59 p. teksto be priedų, 58 iliustr., 14 lent., 20 bibliografiniai šaltiniai. Atskirai pridedami darbo priedai.
Thesis abstract (EN)
In the master thesis the balcony assemblies of old-built apartment blocks and their impact on the energy performance of buildings are analysed. The aim of the study is to present structural solutions for balcony assemblies and their thermal bridges to achieve energy performance class A. Using THERM software, different variants of the units were modelled and analyzed: both non-renovated (glazed and open balconies) and renovated (with additional thermal insulation, metal balcony, cold break detail, rock wool insulation). The heat transfer coefficients and heat flux distribution were assessed and the balcony with rock wool insulation was found to be the most efficient solution with the lowest heat transfer coefficient. The results of study highlights the importance of reducing thermal bridges in building renovation and assesses how this problem manifests itself in the Lithuanian climate.
The volume of the thesis is 59 p. of text without appendices, 58 illustrations, 14 tables, 20 bibliographic sources. The annexes are attached separately.
David Akintunde Katende
— Assoc Prof Dr Giedrė Streckienė
Performance Analysis of an Unglazed Transpired Solar Collector in Different Climates
This master's thesis investigates the performance of Unglazed Transpired Solar Collectors (UTSCs) across five different climatic zones: tropical (Kampala, Uganda), desert (Riyadh, Saudi Arabia), Mediterranean (Madrid, Spain), continental...
Performance Analysis of an Unglazed Transpired Solar Collector in Different Climates
Student:
David Akintunde Katende
Supervisor:
Assoc Prof Dr Giedrė Streckienė
Department:
Department of Building Energetics
Thesis abstract (LT)
Šiame magistro darbe tiriamas neįstiklinto pratakaus saulės kolektoriaus (NPSK) veikimas penkiose skirtingose klimato zonose: atogrąžų (Kampala, Uganda), dykumos (Rijadas, Saudo Arabija), Viduržemio jūros (Madridas, Ispanija), žemyninėje (Vilnius, Lietuva) ir poliarinėje (Svalbardas, Norvegija). Tyrime naudojama TRNSYS programa, skirta NPSK veikimui modeliuoti, analizuojant pagrindinius rodiklius, tokius kaip šiluminis efektyvumas, ištekančio oro temperatūra ir naudingoji šiluminė energija. Tyrime pabrėžiama klimato veiksnių (saulės spinduliuotės, aplinkos oro temperatūros) įtaka NPSK efektyvumui ir atliekamas ekonominio technologijos vertinimas kiekvienai vietovei. Rezultatai rodo, kad dėl pastovios saulės spinduliuotės NPSK optimaliai veikia atogrąžų ir dykumų klimato zonose, o šaltesniuose regionuose, kuriuose vyrauja sezoniniai svyravimai, jų efektyvumas mažėja. Darbo pabaigoje pateikiamos rekomendacijos dėl NPSK diegimo, pabrėžiant jų tinkamumą regionuose, turintiems didelį saulės išteklių potencialą, ir siūloma naudoti hibridines sistemas mažiau palankiomis klimato sąlygomis.
Thesis abstract (EN)
This master's thesis investigates the performance of Unglazed Transpired Solar Collectors (UTSCs) across five different climatic zones: tropical (Kampala, Uganda), desert (Riyadh, Saudi Arabia), Mediterranean (Madrid, Spain), continental (Vilnius, Lithuania), and polar (Svalbard, Norway). The study employs TRNSYS software to simulate UTSC performance, analyzing key metrics such as thermal efficiency, outlet air temperature, and useful energy gain. The research highlights the influence of climatic variables (solar irradiance, ambient temperature) on UTSC effectiveness and includes an economic viability assessment for each location. Results indicate that UTSCs perform optimally in tropical and desert climates due to consistent solar radiation, while their efficiency declines in colder regions with seasonal variability. The thesis concludes with recommendations for UTSC deployment, emphasizing their suitability for regions with high solar availability and proposing hybrid systems for less favorable climates.
Deimantė Andrulionytė
— Assoc Prof Dr Artur Rogoža
Design of Heat Supply Systems for Buildings in the Santariskes Quarter of Vilnius City
In the final bachelor's thesis, the design of heat supply systems for the buildings of the Vilnius city quarter, located in Santariskes, is carried out. The work designs...
Design of Heat Supply Systems for Buildings in the Santariskes Quarter of Vilnius City
Student:
Deimantė Andrulionytė
Supervisor:
Assoc Prof Dr Artur Rogoža
Department:
Department of Building Energetics
Thesis abstract (LT)
Baigiamajame bakalauro darbe atliekamas Vilniaus miesto kvartalo, esančio Santariškėse, pastatų aprūpinimo šiluma sistemų projektavimas. Darbe projektuojamas centralizuotas šilumos tiekimo tinklas (CŠT) 32 kvartale esantiems gyvenamosios paskirties pastatams. Projektuojama sistema skirta užtikrinti šilumos tiekimą karšto vandens ruošimui ir patalpų šildymui. Kvartale projektuojamas bekanalis šilumos tiekimo tinklas su iš anksto izoliuotais plieniniais vamzdžiais. Darbe pateikiamos pastatų modernizavimo alternatyvos. Viena iš alternatyvų yra skirta kvartale esantiems daugiabučiams. Šiems pastatams numatomas saulės kolektorių įrengimas ant stogo, siekiant padengti karšto vandens poreikius. Sekanti alternatyva skirta gyvenamiesiems vienbučiams, dvibučiams ir kotedžo tipo pastatams. Šiems objektams numatoma renovacija iki A++ energinės naudingumo klasės, šilumos siurblio oras-vanduo įrengimas ir saulės elektrinės ant pastato stogo projektavimas, taip užtikrinant pastatų aprūpinimą atsinaujinančia energija. Šios alternatyvos paskirtis - tenkinti pastato šilumos ir karšto vandens poreikius. Įrengiamoms sistemoms atliekamas ekonominis skaičiavimas ir vertinimas, nustatomas atsipirkimo laikotarpis. Atlikus reikiamus skaičiavimus ir vertinimus, pateikiamos baigiamojo darbo išvados.
Baigiamąjį darbą sudaro: įvadas, vietovės klimatologiniai duomenys, tipinio pastato aprašas, atitvarų šiluminės charakteristikos, pastatų šilumos galių ir poreikio nustatymas, hidrauliniai skaičiavimai, centralizuoto šilumos tiekimo tinklo projektavimas, kvartalo pastatų modernizavimas ir alternatyvių aprūpinimo šiluma variantų projektavimas, ekonominis vertinimas, išvados, literatūros sąrašas ir priedai.
Thesis abstract (EN)
In the final bachelor's thesis, the design of heat supply systems for the buildings of the Vilnius city quarter, located in Santariskes, is carried out. The work designs a centralized heat supply network (DHS) for 32 residential buildings in block. The system aims to ensure heat supply for hot water preparation and space heating. A ductless heat supply network with pre-insulated steel pipes has been implemented in the block. The work presents building modernization alternatives. One of the alternatives is for apartment buildings in the block. These buildings will have to install solar collectors on the roof in order to cover hot water needs. The next alternative is for residential one-, two- and cottage-type buildings. These residences are planned to be renovated to A++ energy efficiency class, equipped with an air-to-water heat pump system, and a solar power plant on the roof of the building, thus ensuring the provision of buildings with renewable energy. The purpose of this alternative is to meet the building's heat and hot water needs. An economic calculation and assessment are carried out for the installed systems, and the payback period is determined. After the necessary calculations and assessments are performed, the conclusions of the final thesis are summarized.
The final thesis consists of: an introduction, climatological data of the area, a description of a typical building, thermal characteristics of the partitions, determination of the heat capacity and demand of buildings, hydraulic calculations, design of a centralized heat supply network, modernization of buildings in the block and design of alternative heat supply options, economic evaluation, conclusions, references and annexes.
Erika Litvinavičiūtė
— Assoc Prof Dr Violeta Misevičiūtė
Indoor Climate Systems of an Administrative Building in Vilnius
The bachelor‘s thesis focuses on the design of the indoor climate for an administrative building located in Vilnius. The project includes the design of heating, ventilation, and cooling...
Indoor Climate Systems of an Administrative Building in Vilnius
Student:
Erika Litvinavičiūtė
Supervisor:
Assoc Prof Dr Violeta Misevičiūtė
Department:
Department of Building Energetics
Thesis abstract (LT)
Baigiamajame bakalauro darbe administraciniam pastatui Vilniuje suprojektuotos mikroklimato: šildymo, vėdinimo ir vėsinimo sistemos bei parinkta atsinaujinančios energetikos alternatyva, kuri padengia visus arba dalinius šildymo/vėsinimo poreikius. Pastatą aptarnauja 6 oro ruoštuvai, kurie bendrai į pastatą tiekia 13883 m3/h oro kiekį. Atlikus pastato modeliavimą su IDA ICE modeliavimo priemone yra gautos šildymo ir vėsinimo galios ir poreikiai. Pastato projektinė šildymo galia – 64,6 kW, šiai galiai patenkinti yra projektuojama vandeninė grindinio šildymo sistema, radiatoriai bei konvektoriai. Šiluma ruošiama šilumos punkte. Pastato 26 vėsinamų patalpų 137 kW galiai užtikrinti projektuojami ventiliatoriniai konvektoriai. Vėsa yra ruošiama šalčio mašinoje, esančioje rūsyje. Alternatyviam variantui pasirinkta geoterminių gręžinių sistema su gruntas – vanduo šilumos siurbliu. Pastato sklype projektuojami 12 gręžinių po 100 metrų gylio. Ši technologija leidžia padengti šildymo ir vėsinimo poreikius ne piko metu.
Darbo apimtis - 126 p. teksto be priedų, 92 iliustr., 38 lent., 22 bibliografiniai šaltiniai.
Atskirai pridedami: 20 brėžinių.
Thesis abstract (EN)
The bachelor‘s thesis focuses on the design of the indoor climate for an administrative building located in Vilnius. The project includes the design of heating, ventilation, and cooling systems, as well as the selection of a renewable energy alternative capable of fully or partially covering heating and cooling demands. The building is served by 6 air handling units supplying a total of 13883 m3/h of air. The building has been modelled with the IDA ICE simulation tool to obtain the heating and cooling capacities (kW) and demands (MWh). The design heating capacity of the building is 64,6 kW, for which a hydronic underfloor heating system, radiators and convectors are designed. The heat is generated by a heat point. Fan-assisted convectors shall be designed to provide 137 kW of cooling to the 26 cooled rooms of the building. Cooling is provided by a chiller in the basement. As an alternative, a geothermal borehole system with a ground-to-water heat pump is selected. 12 boreholes of 100 meters depth each are planned on the building plot. This technology allows to cover heating and cooling needs at off-peak times.
The volume of the work is 126 p. of text without appendices, 92 illustrations, 38 tables, 18 bibliographical sources.
Separately attached: 20 schemes.
Esosa Gift Aigbodion
— Assoc Prof Dr Kęstutis Valančius
The Influence of Non-Transparent Envelope Insulation on the Cooling Demand of Residential Buildings in Nigeria
The thermal performance of a building envelope significantly impacts cooling energy consumption, particularly in countries with very hot climates like Nigeria. Non-transparent envelope insulation, including walls, roofs, and...
The Influence of Non-Transparent Envelope Insulation on the Cooling Demand of Residential Buildings in Nigeria
Student:
Esosa Gift Aigbodion
Supervisor:
Assoc Prof Dr Kęstutis Valančius
Department:
Department of Building Energetics
Thesis abstract (LT)
Pastato atitvarų šiluminės savybės turi didelę įtaką vėsinimo energijos suvartojimui, ypač tokiose karšto klimato šalyse kaip Nigerija. Neskaidrių atitvarų, įskaitant sienas, stogus ir grindis, apšiltinimas atlieka svarbų vaidmenį mažinant šilumos pritekėjimą, gerinant patalpų šiluminį komfortą ir reguliuojant patalpų temperatūrą. Šiame tyrime nagrinėjama Nigerijoje pastatyta tradicinė 3 sluoksnių neapšiltinta pastato siena ir lyginama su apšiltinta 4 sluoksnių pastato siena, kurioje naudojamos įvairios izoliacinės medžiagos, siekiant įvertinti neskaidrios atitvarų izoliacijos įtaką gyvenamųjų pastatų vėsinimo poreikiui Nigerijoje. Analizuojant skirtingas izoliacines medžiagas ir jų storį, šiame tyrime vertinamas jų veiksmingumas mažinant vėsinimo apkrovas. Atliekant tyrimą atsižvelgiama į pagrindinius klimato veiksnius, tokius kaip saulės spinduliuotė ir aplinkos temperatūra, kad būtų galima nustatyti izoliacijos strategijas siekiant energijos vartojimo efektyvumo. Išvados rodo, kad tinkamai izoliuotos neskaidrios atitvaros gali sumažinti gyvenamųjų pastatų vidaus temperatūrą ir vėsinimo energijos poreikį. Šiame tyrime pabrėžiama, kaip svarbu taikyti energiją taupančias atitvarų konstrukcijas, kad būtų padidintas tvarumas ir sumažinta priklausomybė nuo mechaninių vėsinimo sistemų. Šios įžvalgos galėtų prisidėti plėtojant naują praktiką, skirtą pastatų energiniam efektyvumui didinti Nigerijos gyvenamųjų pastatų statybos ir renovacijos sektoriuje.
Thesis abstract (EN)
The thermal performance of a building envelope significantly impacts cooling energy consumption, particularly in countries with very hot climates like Nigeria. Non-transparent envelope insulation, including walls, roofs, and floors, plays a vital role in reducing heat gain, improving indoor thermal comfort, and regulating indoor temperature. This study examines the traditional 3-layer uninsulated building wall constructed in Nigeria and compares it to an insulated 4-layer building wall using various insulation materials to evaluate the influence of non-transparent envelope insulation on the cooling demand of residential buildings in Nigeria. By analysing different insulation materials and thicknesses, this study assesses their effectiveness in minimising cooling loads. The research considers key climatic factors such as solar radiation and ambient temperature to determine insulation strategies for energy efficiency. Findings indicate that properly insulated, non-transparent envelopes can lower indoor temperatures and cooling energy demand in residential buildings. However, factors like material selection and installation also influence the overall performance of these buildings. This study emphasises the importance of adopting energy-efficient envelope designs to enhance sustainability and reduce dependence on mechanical cooling systems. These insights could greatly contribute to the development of new practices for improving building energy efficiency in Nigeria’s residential building construction and renovation sector.
Justinas Liberis
— Assoc Prof Dr Vilūnė Lapinskienė
The Design of Indoor Climate Systems of The Furniture Centre in Vilnius
The final thesis analyzes the microclimate systems of an administrative building in Vilnius. The total building area is 448.9 m². All building envelopes and microclimate systems are designed...
The Design of Indoor Climate Systems of The Furniture Centre in Vilnius
Student:
Justinas Liberis
Supervisor:
Assoc Prof Dr Vilūnė Lapinskienė
Department:
Department of Building Energetics
Thesis abstract (LT)
Baigiamajme darbe nagrinėjamos administracinės paskirties pastato Vilniuje mikroklimato sistemos. Bendras pastato plotas – 448,9 m². Visos pastato atitvaros, bei mikroklimato sistemos suprojektuotos pagal A++ energinio naudingumo klasę atitinkančius reikalavimus. Darbe apskaičiuoti pastato šilumos nuostoliai, nustatytos mikroklimato sistemų galios, metiniai energijos poreikiai. Projektuojamos mikroklimato sistemos – vėdinimas, šildymas ir vėsinimas. Pastatui suprojektuotos dvi mechaninio oro tiekimo ir šalinimo sistemos, kolektorinė grindinio ir konvektorinio šildymo sistema. Abi oro tiekimo bei šalinimo sistemos atliks orinį šildymą. Parinktoms patalpoms suprojektuota vėsinimo sistema su ventiliatoriniais konvektoriais. Alternatyvus sprendimas – 16,7 kW galios saulės elektrinės įrengimas ant pastato aukštesniojo stogo. Darbe atliktas ekonominis vertinimas.
Thesis abstract (EN)
The final thesis analyzes the microclimate systems of an administrative building in Vilnius. The total building area is 448.9 m². All building envelopes and microclimate systems are designed to meet the requirements of the A++ energy efficiency class. The thesis includes calculations of the building's heat losses, determination of the capacities of microclimate systems, and annual energy demands. The designed microclimate systems include ventilation, heating, and cooling. Two mechanical air supply and exhaust systems are designed for the building, along with a collector-based underfloor and convector heating system. Both air handling systems will provide air-based heating. A cooling system with fan coil units is designed for selected premises. An alternative solution - installation of a 16.7 kW solar power plant on the upper roof of the building. An economic evaluation has also been carried out.
Karolis Truskauskas
— Jolanta Čiuprinskienė
Indoor Climate Systems of the Car Dealership in Vilnius
The microclimate systems designed in this work include ventilation, heating and cooling. The purpose of the building is a car showroom. The building consists of two functional parts:...
Indoor Climate Systems of the Car Dealership in Vilnius
Student:
Karolis Truskauskas
Supervisor:
Jolanta Čiuprinskienė
Department:
Department of Building Energetics
Thesis abstract (LT)
Šiame darbe suprojektuotos mikroklimato sistemos: vėdinimas, šildymas ir vėsinimas. Darbe nagrinėjamo pastato paskirtis – automobilių pardavimo salonas. Pastatas susideda iš dviejų funkcinių dalių – automobilių pardavimo salono ir automobilių serviso. Bendras pastato plotas siekia 438 m². Projektuojama energinio naudingumo klasė – A++, todėl visos pastato atitvaros turi atitikti šiai klasei keliamus reikalavimus. Pastatui suprojektuotos dvi atskiros vėdinimo sistemos: OTIS–1 – skirta automobilių salono patalpoms, OTIS–2 – skirta automobilių serviso patalpoms. Pastate projektuojama šildymo sistema, kurios šilumnešis – vanduo. Automobilių salono patalpos bus šildomos grindiniu šildymu, o serviso patalpose naudojami vandeniniai šildytuvai. Šilumos šaltinis – centralizuoti miesto šilumos tinklai. Parinkta šilumos punkto pagrindinė įranga: šilumokaitis, plėtimosi indas ir cirkuliacinis siurblys. Taip pat projektuojama vandens pagrindu veikianti vėsinimo sistema. Vėsinimas bus vykdomas naudojant kasetinius ventiliatorinius konvektorius. Parinkta vėsinimo įranga: vėsinimo agregatas, išsiplėtimo indas ir cirkuliacinis siurblys. Nagrinėta alternatyva buvo pastato langų g faktoriaus mažinimas. Atliktas bazinio ir alternatyvaus sprendimų ekonominis vertinimas, siekiant nustatyti, ar nagrinėjama alternatyvi priemonė yra ekonomiškai naudinga. Darbo apimtis 89 psl., teksto be priedų, 43 iliustr., 33 lent., 17 šaltinių, 10 priedų ir 11 brėžinių.
Thesis abstract (EN)
The microclimate systems designed in this work include ventilation, heating and cooling. The purpose of the building is a car showroom. The building consists of two functional parts: a car showroom and a car service area. The total area of the building is 438 m². The energy performance class of the design is A++, therefore all building envelopes must comply with the requirements of this class. Two separate ventilation systems have been designed for the building: OTIS-1 for the car showroom and OTIS-2 for the car service area. The building will have a heating system with water as the heat transfer medium. The car showroom will be heated by underfloor heating and the service area by water heaters. The heat source is the centralised district heating network. The main equipment selected for the heat substation is a heat exchanger, an expansion vessel and a circulating pump. The cooling system for the building designed to be a water-based system. The cooling will be provided by means of cassette fan convectors. The cooling equipment selected includes a cooling unit, an expansion vessel and a circulating pump. The alternative considered was the reduction of the g-factor of the building windows. An economic evaluation of both the baseline solution and the alternative was carried out. The thesis consists of 89 pages of text without appendices, 40 illustrations, 32 tables, 17 references, 10 annexes and 11 technical drawings.
Matas Žostautas
— Assoc Prof Dr Juozas Bielskus
Design of Microclimate Systems for a Residential Apartment Building in Vilnius.
This thesis presents the design of microclimate systems – ventilation, heating, and cooling – for a residential apartment building located on I. Labutytė street in Vilnius. The total...
Design of Microclimate Systems for a Residential Apartment Building in Vilnius.
Student:
Matas Žostautas
Supervisor:
Assoc Prof Dr Juozas Bielskus
Department:
Department of Building Energetics
Thesis abstract (LT)
Šiame darbe suprojektuotos gyvenamojo daugiabučio, esančio Vilniuje, I. Labutytės gatvėje, mikroklimato sistemos: vėdinimas, šildymas ir vėsinimas. Bendras pastato plotas yra 859,12 m². Projektuojama energinio naudingumo klasė – A++. Pastate numatoma 13 atskirų vėdinimo sistemų, iš kurių 12 yra gyvenamiesiems butams skirtos vėdinimo sistemos. Bendro naudojimo patalpoms suprojektuota atskira AHU-0 vėdinimo sistema. Pastate esančios gyvenamos patalpos yra šildomos grindiniu šildymu, o bendro naudojimo patalpose suprojektuoti radiatoriai. Šildymo sistemoje naudojamas šilumnešis – vanduo, o šilumos šaltinis – centralizuoti šilumos tinklai. Darbe apskaičiuota ir parinkta visa šildymo sistemos įranga bei suprojektuotas šilumos punktas su šilumokaičiu, cirkuliaciniu siurbliu ir išsiplėtimo indu. Pastatui vėsinti numatoma centralizuota sistema. Gyvenamose patalpose suprojektuoti ventiliatoriniai konvektoriai, į kuriuos tiekiamas vandens ir 35% etilenglikolio mišinys. Vėsinimo agregatas yra numatomas ant pastato stogo. Sistemai taip pat apskaičiuota ir parinkta visa reikiama įranga, kaip vėsinimo agregatas, cirkuliacinis siurblys, išsiplėtimo indas. Suprojektuotoms pastato mikroklimato sistemoms yra nagrinėjamos alternatyvos – šilumos siurblys bei saulės elektrinė. Šioms alternatyvoms atliktas ekonominis vertinimas 20 metų eksploataciniam laikotarpiui. Darbo apimtis – 87 psl. be priedų, 58 iliustracijos, 41 lentelė, 31 šaltiniai, 32 priedai.
Thesis abstract (EN)
This thesis presents the design of microclimate systems – ventilation, heating, and cooling – for a residential apartment building located on I. Labutytė street in Vilnius. The total area of the building is 859,12 m2. The projected energy efficiency class of the building is A++. The building includes 13 separate ventilation systems, 12 of which are intended for residential apartments. A separate AHU-0 ventilation system is designed for common-use areas. The residential spaces in the building are heated using floor heating, while radiators are planned for the common-use areas. The heating system uses water as the heat transfer medium, with centralized district heating as the heat source. All the necessary heating system equipment has been calculated and selected, and a heating unit with a heat exchanger, circulation pump, and expansion tank has been designed. The building is planned to be cooled via a centralized cooling system. Fan coil units are designed for the residential areas, which are supplied with a mixture of water and 35% ethylene glycol. The cooling unit is planned to be installed on the building’s roof. All the necessary equipment for the system, such as the cooling unit, circulation pump, and expansion tank, has also been calculated and selected. This thesis also presents alternative solutions for the designed microclimate systems, specifically, a heat pump and a solar power plant. An economic assessment for these alternatives was conducted for a 20-year operational period. The thesis comprises 87 pages excluding appendices, with 58 illustrations, 41 tables, 31 reference, and 32 appendices.