04-12-2012, 02:00 PM
Refrigeration
Notes 27.ppt (Size: 240.5 KB / Downloads: 83)
Refrigeration affects many areas of your life
The obvious:
Refrigerator/Freezers allow food preservation
Air conditioning makes Texas inhabitable between July 4 and mid-September
Refrigerated fishing boats allow preservation of catch
Refrigerated trucks are used to ship fruits/meats
Refrigeration makes possible medical procedures that call for lowering body temperatures
Four processes in cycle
Isentropic compression (1 to 2)
Constant pressure condensation (2 to 3)
Isenhalpic expansion (3 to 4)
Constant pressure evaporation (4 to 1)
TEAMPLAY
A system operates between fixed indoor and outdoor temperatures. It has a fixed win.would the COP be greater for heat pump operation or cooling operation? Why?