MAE 91 Su13: HW 5
MAE 91 Su13: HW 5
MAE 91 Su13: HW 5
W = 2 kW
a Q H = 6 kW
a.
W, QL = 4 kW,
k
W = 6 kW
b Q H = 6 kW
b.
W, QL = 0 kW,
k
W = 5 kW
c Q H = 6 kW
c.
W, QL = 2 kW,
k
d Q H = 6 kW
d.
W, QL = 6 kW
W, W = 0 kW
k
5..37- Prove
d
that violates
v
the KelvinPlan
K
ck statementt of the secoond law also violates
thhat a cyclic
device
thhe Clausius statement
s
off the second law.
l
5.104 -We wish to produce refrigeration at 30C. A reservoir, shown in figure, is available at 200C and
the ambient temperature is 30C. Thus, work can be done by a cyclic heat engine operating between the
200C reservoir and the ambient. This work is used to drive the refrigerator. Determine the ratio of the
heat transferred from the 200C reservoir to the heat transferred from the 30C reservoir, assuming all
processes are reversible.