Heat pump with heat-pipe enhancement and with primary system reheat
OwnerRoland Ares, Ness Lakdawalainventors
Life of this patent
Estimating the term…
Abstract
For a supermarket having open refrigerated food display cases and adjacent cold isles and having primary refrigeration systems for refrigerating the cases, energy efficient ventilating means for removing the cold air from the isles and supplying replacement conditioned dehumidified air. The ventilating means includes heat pipes for utilizing the cooling effect of the cold leaving air removed from the isles to precool warm outside make-up air and a reversible refrigerating system for further cooling and dehumidifying the precooled outside air. Excess heat available from the primary market refrigerating system is employed to heat or reheat the dehumidified but now cold outdoor make-up air prior to its entry into the market.
Claims14
Ventilating means for removing cold air from a cold location and replacing it with warmed dehumidified air, said means comprising:
- a first refrigerating system having an evaporator and a condenser,
- said evaporator having an air entering side and an air leaving side and said condenser having an air entering side and an air leaving side,
- a first airstream traversing said evaporator from its air entering side to its air leaving side, said airstream having an outdoor source, whereby said outdoor air is cooled and dehumidified,
- a second airstream traversing the condenser from its air entering side to its air leaving side, said airstream having its source at the cold location,
- and heat exchange means separate from said evaporator and said condenser for exchanging heat between the first airstream at a location substantially adjacent the evaporator air entering side and the second airstream at a location substantially adjacent the condenser air entering side, whereby the first airstream is precooled prior to entering the evaporator, thereby increasing the cooling and dehumidifying effect of the evaporator on said first airstream and causing the first evaporator to discharge said first airstream in a cold dehumidified condition on its air leaving side, and the second airstream is preheated prior to entering the condenser, and further providing;
- a second refrigerating system having a primary condenser, said primary condenser having an inlet and an outlet,
- and secondary condenser means connected to said second refrigerating system, said secondary condenser means positioned in the first airstream on the air leaving side of the evaporator.
A cold air removal and make-up air system for a space comprising
- first conduit means for withdrawing cold air from the space, second conduit means for supplying fresh outdoor make-up air to the space;
- first refrigerating system means for removing heat from the make-up air and supplying heat to the cold air from the space, the first refrigerating system means having a refrigerant condenser positioned in the first conduit means and a refrigerant evaporator positioned in the second conduit means, whereby the make-up air is cooled and dehumidified,
- and heat pipe means for exchanging heat between the make-up air and the cold air from the space whereby the cold air is warmed prior to its entry into the condenser and the make-up air is cooled prior to its entry into the evaporator,
- and further providing a second refrigerating system having a compressor, a primary condenser having an inlet and an outlet and having secondary condenser means for heating the cooled and dehumidified make-up air.
A cold air removal and make-up air system for a market space comprising first conduit means for withdrawing cold air from the space, second conduit means for supplying fresh outdoor make-up air to the space;
- reversible refrigerating system means for removing heat from one conduit means and supplying heat to the other conduit means, the reversible system having a cooling mode wherein the reversible system cools and dehumidifies the make-up air and heats the cold air from the space, and a heating mode wherein the reversible system further cools the air from the space and heats the make-up air,
- and heat transfer means separate from the reversible refrigerating system for transferring heat from the warmer of the air in either conduit means to the air in the other conduit means,
- and further providing a second refrigerating system having a primary condenser having an inlet and an outlet and having secondary condenser means for heating the cooled and dehumidified make-up air.
Dependencies are inferred from the claim text.