
144 Forensic Engineering Fundamentals
is capacity is also the same as 12,000 Btu/h or 200 Btu/min. e eciency of a vapor
compression system is given by the horsepower used per ton of refrigeration. If the refrig-
eration is N tons, or 200 N Btu/min, and since 1 hp = 42.44 Btu/min, then
N
42 44
.
(6.6)
Equation 6.6 represents the horsepower per ton of refrigeration required for the cycle.
Figure 6.6 represents a compression refrigeration cycle. e main components include a
compressor, a condenser, an expansion valve, and an evaporator.
e refrigeration takes place on either side of the evaporator where
(6.7)
In the heati ...