Passive solar heating systems require little, if any, non-renewable energy to function. Every building is passive in the sense that the sun tends to warm it by day and it loses heat at night. Passive systems incorporate solar energy collection, storage, and distribution into the architectural design of the building and make minimal or no use of mechanical equipment, such as fans, to deliver the collected energy. Passive solar heating, cooling, and lighting design must consider the building envelope and its orientation, the thermal storage mass, window configuration and design, the use of sun spaces, and natural ventilation.
As part of the design process, a preliminary analysis must be undertaken to investigate the possibilities for saving energy through solar energy and the selection of the appropriate passive technique. The first step to consider for each case investigated should include an analysis of the climatic data of the site and definition of the comfort requirements of the occupants and the way to meet them. The passive system can then be selected by examining both direct and indirect gains.
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Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.