FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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3. A reversible refrigeration cycle operates between cold and hot reservoirs at temperatures TC and TH, respectively.
(a) If the coefficient of performance is 3.5 and TC = -40 deg F,
determine TH, in deg F.
(b) If TC = -30 deg C and TH = 30 deg C, determine the coefficient
of performance.
(C) If QC = 500 Btu, QH = 800 Btu, and TC = 20 deg F, determine
TH, in deg F.
(d) If TC = 30 deg Fand TH = 100 deg F, determine the coefficient
of performance.
(e) If the coefficient of performance is 8.9 and TC = -5 deg C,
find TH, in deg C.
The thermal efficiency of a reversible power cycle operating between hot and cold reservoirs is 60%.
Evaluate the coefficient of performance of:
(a) a reversible refrigeration cycle operating between the same two reservoirs.
(b) a reversible heat pump cycle operating between the same two reservoirs.
Part A
Evaluate the coefficient of performance of a reversible refrigeration cycle operating between the same two reservoirs.
B = i
Save for Later
Part R
Attempts: 0 of 4 used Submit Answer
Q: The working fluid, in a steady flow process flows at a rate of 220 kg/min. The fluid
rejects 100 kJ/s passing through the system. The conditions of the fluid at inlet and outlet
are given as : C1 = 320 m/s, p1 = 6.0 bar, u1 = 2000 kJ/kg, v1 = 0.36 m3/kg and C2 = 140 m/s,
p2 1.2 bar, u2 = 1400 kJ/kg, v2 = 1.3 m3/kg. The suffix 1 indicates the condition at inlet
and 2 indicates at outlet of the system. Determine the power capacity of the system in MW.
The change in potential energy may be neglected.
Fluid
Fluid
leaves
System
enters
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