Contributions Regarding the Energy Efficiency of Public Buildings through Thermal Insulation

Abstract:

The construction sector is one of the major consumers of energy and non-renewable natural resources, but also an important factor in increasing global warming through the production of greenhouse gases. It is essential to involve and prioritize the energy renovation of buildings, both to increase interior comfort and to reduce the impact on the environment (40% of total energy consumption, 36% of total CO2 emissions, 25-30% of total waste generated) (Valverde et al., 2013) [1]. Amending Directive (EU) 2018/844 requires EU countries to develop, by 2050, long-term renovation strategies to support the renovation of residential and non-residential buildings into a building stock with a high level of energy efficiency and decarbonisation. [2]. The purpose of the work is to provide recommendations, to establish the energy performance of a public building-secondary school-x and to substantiate the solutions and measures for its rehabilitation. The objectives of this paper are to study and develop tools for analyzing the energy optimization options of the structural components of buildings and to formulate an efficient and easily approachable framework-procedure for the evaluation of the decision-making process of increasing the energy efficiency of buildings. The energy performance of the building is determined according to a calculation methodology and is expressed by one or more numerical indicators that are calculated taking into account the thermal insulation, the technical characteristics of the building and installations, the design and location of the building in relation to external climatic factors, exposure to the sun and the influence of neighboring buildings, own sources of energy production and other factors, including the indoor climate of the building, which influence the energy requirement. The techniques used consist in the determination of heat losses through glazed surfaces and opaque surfaces. The results showed that through the package of measures applied, the primary energy consumption was reduced by 56.38%, the annual primary energy consumption 94.49 [kwh/m2, year], and the CO2 equivalent emission index = 18.44 [kgCO2/m2, year].

• Periodical: Advances in Science and Technology (Volume 163)
• Pages: 75-95
• DOI: https://doi.org/10.4028/p-JnDg89
• Online since: May 2025
• Authors: Eugenia Trasca*, Marin Bica
• Keywords: Energy Efficiency, High Eficiency Instalations, Thermal Rehabilitation

References

[1] Valverde I. C., Castilla L. H., Nunez D. F., Rodriguez-Senın E., de la Mano Ferreira R. (2013), Development of New Insulation Panels Based on Textile Recycled Fibers, Waste Biomass Valor 4:139–146

DOI: 10.1007/s12649-012-9124-8

[2] DIRECTIVE 2010/31/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 19 May 2010 on the energy performance of buildings(recast).

[3] Schiavoni, S., F. D'Alessandro, F. Bianchi, and F. Asdrubali. 2016. Insulation materials for the building sector: A review and comparative analysis. Renewable and Sustainable Energy Reviews 62:988–1011.

DOI: 10.1016/j.rser.2016.05.045

[4] Morsy, M., M. Fahmy, H. Elshakour, and A. Belal. 2017. Effect of thermal insulation on building thermal comfort and energy consumption in Egypt. 2nd International Conference on Advanced Technology and Applied Sciences 1:108.

DOI: 10.1186/s12978-017-0371-9

[5] Aditya, L., T. Mahlia, B. Rismanchi, H. Ng, M. Hasan, and H. Metselaar. 2017. A review on insulation materials for energy conservation in buildings, renew.Sustain. Energy Review 73:1352–65.

DOI: 10.1016/j.rser.2017.02.034

[6] Papadopoulos A.M. (2005), State of the art in thermal insulation materials and aims for future developments, Energy and Buildings 37: 77 –86.

DOI: 10.1016/j.enbuild.2004.05.006

[7] https: //isoterm.ro/noutati/izolatie-termica-cum-izolam-eficient-si-ce-materiale-alegem/#:~: text=Izola%C8%9Bia%20termic%C4%83%20reprezint%C4%83%20reducer

[8] https://isoterm.ro/noutati/izolatia-exterioara/.

[9] Kisilewicz, T. 2019. On the role of external walls in the reduction of energy demand and the mitigation of human thermal discomfort. Sustainability 11 (4):1061–80.

DOI: 10.3390/su11041061

[10] Kumar, A., and B.M. Suman. 2013. Experimental evaluation of insulation materials for walls and roofs and their impact on indoor thermal comfort under composite climate. Building and Environment 59:635–43.

DOI: 10.1016/j.buildenv.2012.09.023

[11] Morsy, M., M. Fahmy, H. Elshakour, and A. Belal. 2017. Effect of thermal insulation on building thermal comfort and energy consumption in Egypt. 2nd International Conference on Advanced Technology and Applied Sciences 1:108.

DOI: 10.1186/s12978-017-0371-9

[12] Porritt, S.M., P.C. Cropper, L. Shao, and C.I. Goodier. 2012. Ranking of interventions to reduce dwelling overheating during heat waves. Energy and Buildings 55:16–27.

DOI: 10.1016/j.enbuild.2012.01.043

[13] https://www.researchgate.net/publication/315713697_Methodology_for_Evaluating_Innovative_Technologies_for_Low-Energy_Retrofitting_of_Public_Buildings [accessed Aug 18 2023].

[14] Legea nr. 372/2005, Monitorul Oficial, (2013), Republicata si actualizata 2020, privind performanta energetica a cladirilor (Republicat în Monitorul Oficial, Partea I nr. 764 din 30 septembrie 2016. Formă aplicabilă la 06 martie 2020).

[15] METODOLOGIE DE CALCUL AL PERFORMANȚEI ENERGETICE A CLĂDIRILOR, INDICATIV Mc 001-(2022)