Effect of fenestration geometrical factors on building energy consumption and performance evaluation of a new external solar shading device in warm and humid climatic condition

Abstract Glazed facades are being increasingly used in modern buildings in order to improve the daylight availability in the interiors, offer better external views and also add to the architectural beauty of the building. However this increased usage of glazed facades is leading to higher solar gain inside the building which is becoming a major issue in hot climatic regions. External shadings are thus used to protect the buildings from direct solar radiation which cause high solar gain as well as discomfort due to glare. The present study summarizes the effect of geometrical factors like window to wall ratio (WWR) and window positioning on the heating, cooling and lighting energy consumption of a South facing building cell in warm and humid climate. The performances of different commonly used external solar shading devices have been compared. The study also proposes the design of an external shading device which, when compared with the existing shading designs, leads to reduction in annual energy consumption of the building. The simulations were carried out using building energy simulation program EnergyPlus for the warm and humid climate of Kolkata, India. In order to validate the applicability of the new shading in other locations experiencing similar climate, the performance of the proposed shading was also evaluated for two other locations- Naples in USA and Hanoi in Vietnam. In both of these cases the new shading offered better performance than the other existing shading designs.

[1]  Ramkishore Singh,et al.  Effect of internal woven roller shade and glazing on the energy and daylighting performances of an office building in the cold climate of Shillong , 2015 .

[2]  Szymon Firląg,et al.  Control algorithms for dynamic windows for residential buildings , 2015 .

[3]  Li Li,et al.  Performance evaluation of building integrated solar thermal shading system: Building energy consumption and daylight provision , 2016 .

[4]  Abdulsalam Ebrahimpour,et al.  Application of advanced glazing and overhangs in residential buildings , 2011 .

[5]  Andreas K. Athienitis,et al.  Manually-operated window shade patterns in office buildings: A critical review , 2013 .

[6]  A. Athienitis,et al.  The impact of shading design and control on building cooling and lighting demand , 2007 .

[7]  Jinkyun Cho,et al.  Viability of exterior shading devices for high-rise residential buildings: Case study for cooling energy saving and economic feasibility analysis , 2014 .

[8]  Kwangbok Jeong,et al.  Nonlinearity analysis of the shading effect on the technical–economic performance of the building-integrated photovoltaic blind , 2017 .

[9]  Daniel E. Fisher,et al.  EnergyPlus: creating a new-generation building energy simulation program , 2001 .

[10]  Laura Bellia,et al.  An Overview on Solar Shading Systems for Buildings , 2014 .

[11]  F. H. Abanda,et al.  An investigation of the impact of building orientation on energy consumption in a domestic building using emerging BIM (Building Information Modelling) , 2016 .

[12]  Jian Yao,et al.  Determining the energy performance of manually controlled solar shades: A stochastic model based co-simulation analysis , 2014 .

[13]  Jeong Tai Kim,et al.  Comparative advantage of an exterior shading device in thermal performance for residential buildings , 2012 .

[14]  Francesca Stazi,et al.  Comparison on solar shadings: Monitoring of the thermo-physical behaviour, assessment of the energy saving, thermal comfort, natural lighting and environmental impact , 2014 .

[15]  Luigi Marletta,et al.  The role of shading devices to improve thermal and visual comfort in existing glazed buildings , 2017 .

[16]  Laura Bellia,et al.  Effects of solar shading devices on energy requirements of standalone office buildings for Italian climates , 2013 .

[17]  Andrea Gasparella,et al.  Internal Versus External Shading Devices Performance in Office Buildings , 2014 .

[18]  Martin Vraa Nielsen,et al.  Quantifying the potential of automated dynamic solar shading in office buildings through integrated simulations of energy and daylight , 2011 .

[19]  Armando C. Oliveira,et al.  Effect of louver shading devices on building energy requirements , 2010 .

[20]  Sona Raeissi,et al.  Optimum overhang dimensions for energy saving , 1998 .

[21]  A. Hashemi,et al.  Effects of Solar Shading on Thermal Comfort in Low-income Tropical Housing , 2017 .

[22]  Ayca Kirimtat,et al.  Review of simulation modeling for shading devices in buildings , 2016 .

[23]  Jianlei Niu,et al.  Comprehensive analysis on thermal and daylighting performance of glazing and shading designs on office building envelope in cooling-dominant climates , 2014 .

[24]  Abdelsalam Aldawoud,et al.  Conventional fixed shading devices in comparison to an electrochromic glazing system in hot, dry climate , 2013 .

[25]  Sharifah Fairuz Syed Fadzil,et al.  The Potential of Shading Devices for Temperature Reduction in High-Rise Residential Buildings in the Tropics , 2011 .

[26]  Berit Time,et al.  Solar shading control strategies in cold climates – Heating, cooling demand and daylight availability in office spaces , 2014 .