A holistic approach to energy efficient building forms
Okeil, A.
2010 Energy and Buildings, 42(9): 1437-1444
Holistic design; Energy efficiency; Solar exposure; Building form; City climate; Urban heat island; Green roofs; Air flow
Okeil, A., (2010), "A holistic approach to energy efficient building forms", Energy and Buildings, 42(9): 1437-1444.
Abstract:
Minimizing energy consumption in buildings has become an important goal in architecture and urban planning in recent years. Guidelines were developed for each climatic zone aiming at increasing solar exposure for buildings in cold climates and at reducing solar exposure for buildings in hot climates. This approach usually plans for the season with the harshest weather; often forgetting that temperatures in cities at latitude 25กใ can drop below thermal comfort limits in winter and that temperatures in cities at latitude 48กใ often rise above thermal comfort limits in summer. This paper argues that a holistic approach to energy efficient building forms is needed. It demonstrates a generic energy efficient building form derived by cutting solar profiles in a conventional block. Results show that the proposed building form, the Residential Solar Block (RSB), can maximize solar energy falling on facades and minimize solar energy falling on roofs and on the ground surrounding buildings in an urban area in winter; thus maximizing the potential of passive utilization of solar energy. The RSB also supports strategies for mitigating the urban heat island through increased airflow between buildings, the promotion of marketable green roofs and the reduction of transportation energy.
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