The largest natural gas distribution company in the US, Southern California Gas Company, will be the first utility in the country to test a solar product for cooling purposes. Congenra has developed a congeneration system to provide air conditioning to the SoCalGas Energy Resource Centre. This adds extra elements to a solar system to maximize its output and value by using the captured heat from the solar panels to run an air conditioning system rather than generating electricity. The solar pv panels that usually convert about 15 per cent of the solar energy into electricity have increased in efficiency by converting the wasted heat generated into hot water.
Have a read: http://www.gizmag.com/cogenra-cogeneration-solar-power-socalgas/22801/