Heat pump closed loop drying
This patent describes a drying apparatus comprising, drying chamber means for receiving items to be dried having an air inlet and an air outlet, heat pumping means comprising evaporating means for allowing refrigerant to evaporate, condensing means for receiving compressed refrigerant, compressing means for compressing evaporated refrigerant from the evaporating means and delivering compressed refrigerant to the condensing means and expansion means for intercoupling the condensing means and the evaporating means to form a closed heat pump system, means for delivering relatively moist air to the evaporating means for removing moisture therefrom and delivering substantially all the air incident on the evaporating means to the condensing means for delivering heat to the incident air from the condensing means, means for coupling substantially all the air from the condensing means to the inlet of the drying chamber means to provide heated dehumidified air for removing moisture from items to be dried therein, means for extracting moist air from the drying chamber means through the air outlet, means for intercoupling the air outlet of the drying chamber means with the input to the evaporating means, wet air heat exchanging means coupled to the means for intercoupling the air outlet and evaporating means inlet for withdrawing heat from the moist air passing therethrough and having a heat withdrawing capacity at least equal to the energy input to the heat pumping means, and blower means for circulating the air through the drying chamber means.
- Assignee:
- NOV; EDB-86-165302; NOV-85-019657
- Patent Number(s):
- US 4603489
- OSTI ID:
- 5249162
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320100* -- Energy Conservation
Consumption
& Utilization-- Buildings
AIR FLOW
BLOWERS
COMPRESSION
DESIGN
DRYERS
DRYING
EVAPORATION
FLUID FLOW
FLUIDS
GAS FLOW
HEAT EXCHANGERS
HEAT PUMPS
MOISTURE
OPERATION
PHASE TRANSFORMATIONS
REFRIGERANTS
VAPOR CONDENSATION
WORKING FLUIDS