Patent ID: 8245949

Claim:
An energy conservation system comprising: a building having a plurality of rooms ( 20 ), a central water source ( 22 ) for supplying central water to said building, an independent water supply line ( 26 ) interconnecting said central water source ( 22 ) and each of said rooms ( 20 ) for supplying water from said central water source ( 22 ) to each of said rooms ( 20 ), an independent air conditioner ( 28 ) in each of said rooms ( 20 ) for generating cool air in each of said rooms ( 20 ) independently of one another, an independent liquid heat exchanger ( 38 ) in each of said rooms ( 20 ) and disposed in heat transfer relationship with said air conditioner ( 28 ) in said room ( 20 ) and connected to said water supply line ( 26 ) for said room ( 20 ) for transferring heat from said air conditioner ( 28 ) to water from said water supply line ( 26 ) to produce heated water, a central hot water circuit ( 50 ) for supplying hot water to said rooms ( 20 ), a heated water return line ( 70 ) in fluid communication with said liquid heat exchanger ( 38 ) and said central water source ( 22 ) for diverting said heated water from said liquid heat exchanger ( 38 ) back to said central water source ( 22 ) in response to an increase of the pressure of said heated water above the pressure of the water source ( 22 ), a dissipating heat exchanger ( 76 , 74 ) disposed in said heated water return line ( 70 ) for cooling said heated water received from said liquid heat exchanger ( 38 ), an auxiliary system ( 84 ) for running a cooling medium through said dissipating heat exchanger ( 76 , 74 ) to transfer heat from said heated water return line ( 70 ) to said auxiliary system ( 84 ), said auxiliary system including a heat absorption line ( 86 , 92 ) extending through said dissipating heat exchanger ( 76 , 74 ) to an outlet independent of said independent water supply line ( 26 ) and said hot water circuit ( 50 ) and said heated water return line ( 70 ) and said central water source ( 22 ) for running the cooling medium through said dissipating heat exchanger ( 76 , 74 ) to independently transfer heat from said return line ( 70 ) to the cooling medium in said heat absorption line ( 86 , 92 ), and a control valve ( 88 , 89 ) for controlling the flow of the cooling medium through said dissipating heat exchanger ( 76 , 74 ) in response to a predetermined temperature of the water in said heated water return line ( 70 ).