Small Scale CHP system

Recently I have become aware of Electratherm's use of a twin screw expander for electrical power generation. I am interested in the design of a small scale (30-200kW) combined heat and power system (CHP). Claims for the system range between 70-80% effiecency. It consists of an Organic Rankine Cycle system. They need 200 degree F to boil the refrigerant. Has anyone designed a condensation system which would heat a greenhouse before cycling the refrigerant back to the evaporator? I imagine the pumping friction to be considerable, however I would be using a geothermal heat source as the baseload.

Thanks for any thoughts.