Method for estimating inlet and outlet air conditions of an...

Details Method for estimating inlet and outlet air conditions of an... Method for estimating inlet and outlet air conditions of an...

2007-05-22

2007-05-22

Jiang, Chen Wen (Department: 3744)

Refrigeration

Automatic control

Humidity sensor

C062S176300, C062S228100

Reexamination Certificate

active

10973009

ABSTRACT:
The temperature of the air exiting an evaporator and the relative humidity of the air entering and exiting the evaporator can be calculated by using existing sensors in a vapor compression system. The temperature of the air exiting the evaporator is calculated by using the detected temperature of the air entering the evaporator, the saturation temperature of the air, and a bypass factor. The relative humidity of the air entering and exiting the evaporator are then estimated using a psychrometric chart. By using the existing sensors to determine the temperature of the air exiting the evaporator and the relative humidity of the air entering and exiting the evaporator, the load requirement of the vapor compression system can be calculated without employing additional sensors. The system capacity of the vapor compression system can be matched to the load requirement to allow the effective use of electric power.

REFERENCES:
patent: 5435146 (1995-07-01), Clark
patent: 58168834 (1983-10-01), None
International Search Report dated Oct. 3, 2006.

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