Refrigeration – With indicator or tester – Condition sensing
Patent
1989-02-14
1989-12-12
Tanner, Harry B.
Refrigeration
With indicator or tester
Condition sensing
36455101, G01K 1300
Patent
active
048859141
ABSTRACT:
The invention relates to a coefficient of performance deviation meter for vapor compression type refrigeration systems. The measurement of the coefficient of performance of a mechanical vapor compression refrigeration system requires that the two parameters be known which are the input power and the heat absorbed or, conversely, the input power and the heat rejected. Manufacturers of vapor compression machines publish performance data on the power used versus the cooling effect at various condenser water supply temperature (Tcws) and various evaporator chilled water supply temperature (Tchws). These data can be used to calculate specific coefficients of performance (COPs) at various Tcws and Tchws. The meter has inputs connected to sensors in a vapor compression system which provide the data for the input power and the heat absorbed parameters. One input is connected to a wattmeter set in the compressor motor power supply circuit which provides the input power. A second input is connected to a sensor which monitors the temperature (Tcws) of the inlet of the condenser cooling water supply. Two other inputs are connected to sensors which monitor the temperature (Tchws and Tchwr) of the supply and return pipes of the load water chilled by the evaporator.
REFERENCES:
patent: 4217761 (1980-08-01), Cornaire et al.
patent: 4325223 (1982-04-01), Cantley
patent: 4432232 (1984-02-01), Brantley et al.
patent: 4510576 (1985-04-01), MacArthur et al.
patent: 4611470 (1986-09-01), Enstrom
Dahle Omund R.
Honeywell Inc.
Tanner Harry B.
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