The words solar cooling sure sound like a contradiction, but its nonetheless true that the same solar energy that provides heat in winter can also give a lot of cooling in the summer months.
There have been quite a number of passive cooling systems developed and tested in recent times. They function quite simplythere is a coolant that absorbs heat and then dispels it outside. Even a water tank or water-contained trough on the roof can act as a coolant, absorbing heat from the house and then dissipating it while it automatically evaporates under the sun.
Apart from these simple methods, there are also some passive solar cooling systems which are more sophisticated and a bit more complex. They have a solar collector which remains shaded through the day. And the storage medium in it gathers all the heat during daytime to release it later after sundown. At night, the shade of the solar collector is removed to bring it in direct contact with the cool night air and thus enabling it to dispel the collected heat.
For shading the solar collector, a retractile sunblind can be put up or an extended shade can be hung over. As this arrangement isnt permanent and will...
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