The problems of a shade-shadow and light in a design of open-air market stall

This paper presents an analysis of some overlooked aspects in an environmental agenda for retail design. The work outline the analysis of the possibilities of maintaining low temperatures in an open-air markets stall space by using an appropriate shed and shading techniques and therefore avoiding direct solar radiation. Temperature difference of up to 100K was realised between shaded and un-shaded surfaces when some spot measurements were taken in the summer month of July (Ernest, 2004). Lower temperatures are imperative to halt the deterioration process of fruits and vegetables (Flores and Karen, 1997). At room temperature half of stored vitamins would be lost in three days (British Nutrition Foundation, 1999). Lower temperature would also enhance human comfort in the summer season. Shading and shadow study were done with digital models built in Square One - Ecotect software with consideration of London as a location. The analysis for optimum orientation and shading at different periods of a day have been presented and discussed, and also the discussion on the separation of heat from sunlight is highlighted. The information is based on the work done during the Environment and Energy Programme at the Architectural Association Graduate School in London.