On the cold side of the heat exchanger, have you considered using thermal storage media (water is simple, or phase change materials) to 'store' cool. Where this might come in handy is with smart grids, as you can then shift your cooling demand to times of low electrical demand by building up a "cold bank", and then draw off this stored cold at periods of high demand. It would allow you to decouple the use of electricity from the use of cold.

Also, what about looking at thermally driven heat exchangers in this application. Have you got any sources of waste heat from heating that could be used to drive the system rather than an electrical compressor? Absorption cooling?

There are several ways for use Concentrated solar system for buildings cooling and heating. Open volumetric receiver can be used for air heating and than for cooling purpose.

In parabolic trough collectors as heat transfer fluid (HTF) is investigated also air and CO2. These alternative working fluids have advantages and disadvantages when they are compared to thermal oils traditionally used in PTC. For exampe disadvantages is lower heat transfer coefficient and advantage is no pollutant.

Heat pumps can also provide the cooling needs of the building.

There are lot of materials on internet ...one is

Conference Paper Concentrated solar power in the built environment

Thanks to all