Life cycle costs optimization of residential buildings

Part I: a case study of external walls

  • Nadezhda Ognjanova Doseva Technical University of Varna, Department of Heat Technology, 9010, 1 Studentska Street, Varna, Bulgaria.
  • Daniela Chakyrova Technical University of Varna, Department of Heat Technology, 9010, 1 Studentska Street, Varna, Bulgaria.
Keywords: genetic algorithm, life cycle costs, optimization, optimal thermal transmittance coefficient


This paper considers the questions of techno-economic optimization in order to determine the thermal transmittance coefficient of the external walls of an existing residential building.The optimization procedure is conducted for the climatic and economic conditions in Bulgaria and taking into account the existing legal framework. The minimum of the building life cycle costs is determined by using genetic algorithm


Becchio C., Dabbene P., Fabrizio E., Monetti V., Filippi M. (2015). Cost optimality assessment of a single family house: Building and technical systems solutions for the nZEB target. Journal of Energy and Buildings, 90, 173-187.
Bojić M., Miletić M., Bojić L. (2014). Optimization of thermal insulation to achieve energy savings in low energy house (refurbishment), Journal of Energy Conversation Manage-ment, 84, 681-690.
Dombayci, Ö., Atalay, Ö., Acar, S., Ulu, E., Ozturk, H. (2017). Thermoeconomic method for determination of optimum insulation thickness of external walls for the houses: Case study for Turkey. Journal of Sustainable Energy Technologies and Assessments, 22, 1-8.
European Parliament, Commission delegated regulation (EU) (2010) 2010/31/EU of the European Parliament and of the council on the energy performance of buildings.
Loukaidou, K., Michopoulos, A., Zachariadis, Th. (2017). Nearly-Zero Energy Buildings: Cost-Optimal Analysis of Building Envelope Characteristics. Procedia Environmental Scienc-es, 38, 20 – 27.
United Nations Environment Programme (2009), Building and Climate Change. Summary for Decision Makers. (Date of Access 2018, June 28) Retrieved from
Енерго Про (2018). Действащи цени на електроенергията, (Energo Pro (2018). Actual prices of electrical energy (Date of Access 2018, June 30) Retrieved from
Досева, Н., Чакърова, Д. (2017) Оптимална дебелина на изолацията на външни ограждащи елементи на жилищна сграда за условията на България. XXII Научна конференция с международно участие, ЕМФ 2017, стр. 223-229 (Doseva, N., Chakyrova, D. (2017) Optimizing thermal insulation thickness of the residential buildings external walls for Bulgarian's climate and market conditions)
Министерство на регионалното развитие и благоустройство (2017). Наредба №7 от 15.12.2004 за енергийна ефективност на сгради. Изм. и доп. бр.93 на "Държавен вестник" (Ministry of Regional Development and Public Works (2017). Regulation №7 for energy efficiency in buildings).
Министерство на регионалното развитие и благоустройството, Министерство на енергети-ката (2016). Наредба № 15 от 28 юли 2005 г. за технически правила и нормативи за проектиране, изграждане и експлоатация на обектите и съоръженията за производс-тво, пренос и разпределение на топлинна енергия. Изм. и доп. бр.6 на "Държавен вестник", (Ministry of Regional Development and Public Works (2016). Regulation №15 for technical rules and norms for the design, construction and operation of the units and equipment for the generation, transmission and distribution of heat).

Total number of hits on abstract = 414 times

Downloads for 2024

Download data is not yet available.
How to Cite
Doseva, N., & Chakyrova, D. (2018, December 20). Life cycle costs optimization of residential buildings. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, 2(2), 62-69.
Bookmark and Share