Patent ID: 7621147

Claim:
A heat recovery system comprising: at least one exhaust air heat exchanger, mounted in the exhaust air stream of a ventilation and/or air conditioning plant, and at least one outside air heat exchanger mounted in the intake air stream of the ventilation and/or air conditioning plant, whereby the at least one exhaust air heat exchanger and the at least one outside air heat exchanger constitute an integrated circuit configured to recover heat from the exhaust air, wherein there is at least one partial circuit separated from the integrated circuit configured to extract cold from the outside air during nighttime in which is mounted the at least one exhaust air heat exchanger, and wherein outside air cooled in an evaporator device for adiabatic cooling is channeled through the at least one exhaust air heat exchanger in order to cool a fluid in the partial circuit, whereby the partial circuit features at least one heat exchanger to transfer cold from the fluid in the partial circuit into a cooling circuit having a cold storage withdraw a cooled fluid during daytime.