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Unformatted text preview: PRINT YOUR NAME/ s at steady state conditions through a centrifugal
f 20 Btu/s. The refrigerant has a at a rate of heat transfer 0
let and exit conditions are given in the table below. Prob. l Refrigerant R1343 ﬂow compressor. The compressor is cooled
ate of 2.0 lbm/s; and the compressor in ﬂow r
0 Determine the shaft power in Btu/s Show the inlet and exit state points on a T
numerical values ofT and v corresponding to in -v diagram relative to saturation lines. Show 0
let and exit states. State Point P (psia) v gft3/lbm) 10 4.0 1 compressor inlet
0.6579 2 compressor exit 80 shaft power = PRINT YOUR NAME g of H20 as saturated liquid-vapor mixture An insulated rigid tank contains 2.00 k
An 8.0 kW resistance heater at 150 kPa,. Initially 88.97% of the mass is vapor.
is switched on and remains on until the pressure doubles. . Prob. 2 (a) Determine the time required for this process to be completed; and
(b) Show the process in a T—V diagram, including property values.
T1 : V] : Time required =
V PRINT YOUR NAME t 100 kPa and 20° C is expanded isothermally in a Prob. 3 Carbon dioxide ( C02 ) a
l the volume is doubled. piston cylinder device unti Determine each of the following: (a) Final pressure . . . . . .. kPa
(b) Work done . . . . . . . . . .. kJ / kg
(c) Heat transfer . . . . . . . .. kJ / kg ANSWERS (a) Pﬁnal : (b) Work = (c) Heat transfer = ...
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This note was uploaded on 04/07/2008 for the course ME 104 taught by Professor Gomatam during the Spring '08 term at Lehigh University .
- Spring '08