GENERALIZED CRITERIA OF ENERGY PERFORMANCE EVALUATION IN EARLY DESIGN STAGES OF NEARLY ZERO-ENERGY BUILDINGS
Abstract
According to Directive 2010/31/EC the member states of the EU shall ensure that by 31 December 2020 all new buildings will be nearly zero-energy buildings (nZEB). They are characterized with very high energy performance, but they still need to meet the energy demand associated with their typical use, which includes energy for heating, cooling, ventilation, hot water and lighting. This energy should be covered to a significant extent by renewable energy. In the early design stages the generalized criteria of the energy performance of the building have to be used. The performance of the building envelope could be evaluated with the Form Factor as a measure of the compactness of the building and the average thermal transmittance U-value of the building envelope. A grid of roses of solar radiation is recommended as a method to evaluate the distribution of solar resources for a plot, situated in a complex urban environment and to guide the architect about the best exposure of the main facades of the building or the group of buildings. The solar potential of a variant building shape could be evaluated with the building shading factor.
References
Directive 2010/31/EC, Available online at: https://eur-lex.europa.eu/legal-%20content/EN/TXT/?uri=CELEX%3A32010L0031
Наредба No 7 за енергийна ефективност на сгради – 2004, 2009, 2015 г.
Milkov S., Chobanov Pl., Penev B. (2009) Opportunities for thermal insulating capability evaluation of building envelopes by the total thermal transmittance coefficient, International Conference UACEG2009: Science & Practice, Sofia, Bulgaria
Capozzoli A., Mechri H.E. and Corrado V. (2009) Impacts of architectural design choices on building energy performance – applications of uncertainty and sensitivity techniques, Eleventh International IBPSA Conference Building Simulation 2009, Glasgow, Scotland
Burrell E. (2015) What is the Heat Loss Form Factor? Available online at: http://elrondburrell.com/blog/passivhaus-heatloss-formfactor/
Milkov S. and Chobanov Pl. (2007) Evaluation of the Thermal Bridges in the Building Envelope, Jubilee scientific conference 65 years, UACEG, Sofia, Bulgaria
Robinson, D. (2006) Urban morphology and indicators of radiation availability, Solar Energy, 80 (12) pp. 1643-1648.
Compagnon R. (2004) Solar and daylight availability in the urban fabric, Energy and Buildings 36, pp. 321–328.
Ivanova S. (2015) Rose of solar irradiation as an indicator of available solar resources for a plot in an urban environment, VII International scientific conference “Architecture, civil engineering – modernity”, Varna, Bulgaria, pp. 255-264
Ivanova S. (2014) Estimation of a building shading factor in an urban environment, International conference on Civil Engineering, Design and Construction: Science and Practice, Varna, Bulgaria, pp. 588-596
IvanovaS.(2014)ImpactoftherooftopPVsystemsonthebuildingshadingfactor,First scientific – applied conference with international participation “Project management in construction”/PMC/, Sofia, Bulgaria, pp. 369-375
Views:
84
Downloads:
49
Copyright (c) 2016 Authors
This work is licensed under a Creative Commons Attribution 4.0 International License.
All articles are published in open-access and licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). Hence, authors retain copyright to the content of the articles.
CC BY 4.0 License allows content to be copied, adapted, displayed, distributed, re-published or otherwise re-used for any purpose including for adaptation and commercial use provided the content is attributed.
