Heat exchange – Heating and cooling – Heating and cooling of the same material
Reexamination Certificate
2005-12-20
2005-12-20
Tapolcai, William E. (Department: 3744)
Heat exchange
Heating and cooling
Heating and cooling of the same material
C062S177000, C062S430000, C236S012100
Reexamination Certificate
active
06976524
ABSTRACT:
An apparatus for maximum work comprising central equipment comprising a refrigeration machine, a water heater, an evaporative cooler and hot and cold storage tanks. Airside equipment for providing supply air to a room or zone. A hot supply/return pipe, a cold supply pipe, and a cold return pipe. A water blending circuit comprising a hot supply runout pipe extending from the hot supply/return pipe and a cold supply runout pipe extending from the cold supply pipe, wherein the water blending circuit further comprises an upstream two position three way changeover valve comprising a first port, a second port, and a third port. The hot supply runout pipe connects to first port and the cold supply runout pipe connects to the second port. A modulating three way zone blending valve connected to the third port of the upstream two position three way valve, and a blending pump for pumping water through a roomside coil, so that return water exits the coil through a return pipe. A zone thermostat positioned to sense a temperature of the zone, and a return water thermostat to sense a temperature of the coil return water, the return water thermostat for controlling the temperature and amount of coil return water that is re-pumped through the coil by controlling the amount that the modulating three way zone blending valve is open or closed to the flow of coil return water, with a downstream two position three way changeover valve for directing the flow of return water.
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Hodgson & Russ LLP
Tapolcai William E.
LandOfFree
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