For the following an ideal reheat-regenerative Rankine cycle with one reheater and two open
feedwater heaters. if y= 0.24 and z=0.04 find
the specific turbine work
Boiler
High-P
turbine
Reheater
Low-P
turbinc
1-y-2
(10)
(11 12
Open
FWH
11
Open
FWH
Condenser
P III
(
PI1
PI
12
11
10
91
8
6
5
4
3
2540 3151 3610289030403630868.5858.5455452192 .2191
2
ادارات​

The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29 r/s. a condensing temperature of 40°c and an evaporating temperature of -4°c shows a refrigeration capacity of 115 kw. at this operating point, the motor (its efficiency is 90 percent) draws 34.5 kw. the bore of the cylinders is 87 mm and the piston stroke is 70 mm. the performance data are based on 8°c of sub-cooling of the liquid leaving the condenser. compute (a) the actual volumetric efficiency and (b) the compression efficiency.