Perforated Thermal Mass Shading: An Approach to Winter Solar Shading and Energy, Shading and Daylighting Performance

Direct solar irradiance may cause thermal discomfort, even in winter when the ambient temperature is low and especially for high-altitude locations with a high intensity of solar radiation. Thus winter solar shading might be required and, if used, must achieve a balance between the prevention of the transmittance of solar irradiance, the utilization of passive solar heat and the supply of adequate natural daylighting. These considerations render conventional solutions of solar shading inapplicable in the winter. In this paper, a novel approach to perforated thermal mass shading for winter is reported and examined. The impacts of the perforated percentage and the opening positions of this shading device on energy, shading and daylighting performance were assessed for south- and west-facing orientations. A range of perforated percentages and vertical and horizontal positions were tested using simulations by Energyplus and Daysim. Our results indicate that the proposed perforated thermal mass shading is efficient for the integrated performance of shading, daylighting and energy savings in the south-facing orientation, while it achieves acceptable performance in shading and daylighting in the west-facing orientation for a high-altitude cold climate.

[1]  Ahmed Sherif,et al.  Balancing the daylighting and energy performance of solar screens in residential desert buildings: Examination of screen axial rotation and opening aspect ratio , 2014 .

[2]  Ki Jun Han,et al.  The Impact of Shading Type and Azimuth Orientation on the Daylighting in a Classroom–Focusing on Effectiveness of Façade Shading, Comparing the Results of DA and UDI , 2017 .

[3]  Philippe Rigo,et al.  A review on simulation-based optimization methods applied to building performance analysis , 2014 .

[4]  K. Steemers,et al.  Time-dependent occupant behaviour models of window control in summer , 2008 .

[5]  Jinyue Yan,et al.  An optimization method applied to active solar energy systems for buildings in cold plateau areas – The case of Lhasa , 2017 .

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

[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]  Ahmed Sherif,et al.  External perforated window Solar Screens: The effect of screen depth and perforation ratio on energy performance in extreme desert environments , 2012 .

[9]  Christoph F. Reinhart,et al.  The simulation of annual daylight illuminance distributions — a state-of-the-art comparison of six RADIANCE-based methods , 2000 .

[10]  Christoph F. Reinhart,et al.  Validation of dynamic RADIANCE-based daylight simulations for a test office with external blinds , 2001 .

[11]  Hongxing Yang,et al.  An experimental study of the thermal performance of a novel photovoltaic double-skin facade in Hong Kong , 2013 .

[12]  John Mardaljevic,et al.  Useful daylight illuminances: A replacement for daylight factors , 2006 .

[13]  Jie Zhu,et al.  Review of passive solar heating and cooling technologies , 2010 .

[14]  M. Pietrafesa,et al.  A model for managing and evaluating solar radiation for indoor thermal comfort , 2007 .

[15]  V. Martin,et al.  Energy analysis of solar blind system concept using energy system modelling , 2016 .

[16]  Hui Zhang,et al.  Window performance for human thermal comfort , 2006 .

[17]  David Moreno,et al.  Design optimisation of perforated solar façades in order to balance daylighting with thermal performance , 2017 .

[18]  R. O’hegarty,et al.  Review and analysis of solar thermal facades , 2016 .

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

[20]  A. Alarcón,et al.  FUNDAMENTALS , 2000, Springer Monographs in Mathematics.

[21]  Darren Robinson,et al.  On the behaviour and adaptation of office occupants , 2008 .

[22]  Hui Zhang,et al.  Modeling the comfort effects of short-wave solar radiation indoors , 2015 .

[23]  Ahmed Sherif,et al.  External perforated Solar Screens for daylighting in residential desert buildings: Identification of minimum perforation percentages , 2012 .

[24]  M. Blumthaler,et al.  Increase in solar UV radiation with altitude , 1997 .

[25]  François Garde,et al.  Assessment of the thermal and visual efficiency of solar shades , 2011 .

[26]  Mario Blumthaler,et al.  Solar Radiation of the High Alps , 2012 .

[27]  Neveen Hamza,et al.  Climate-responsive design of traditional dwellings in the cold-arid regions of Tibet and a field investigation of indoor environments in winter , 2016 .