Specific coefficient of performance measuring device

Details Specific coefficient of performance measuring device Specific coefficient of performance measuring device

F - Mech Eng,Light,Heat,Weapons

25

B

341/28

F25B 49/00 (2006.01) G01L 3/26 (2006.01)

Patent

CA 1207059

-25- ABSTRACT OF THE DISCLOSURE By measuring the power supplied to a compressor motor and by measuring four temperatures within a mechan- ical vapor-compression system, it is possible to develop a device for measuring and/or displaying the specific coefficient of performance of the mechanical vapor-compression system. The use of the temperatures and power supplied to the compressor motor can be used with information on motor losses and a typical temperature-enthalpy and a typical pressure-entropy dia- gram to allow substantially instantaneous computation of the actual specific coefficient of performance of a mechanical vapor-compression system as it operates. The measuring device can usually be installed totally exter- nal to a building in which the mechanical vapor-compression system is being used as a cooling sys- tem, or as a heat pump for heating and cooling.

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