11_Heat_Pump_complete

11_Heat_Pump_complete - Vmax 0.5 ft^3 maximum volume Thi...

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Name Homework 11 Assigned 28-Feb-11 Heat Pump - R-134a Due 2-Mar-11 Environment Properties Cycle Parameters 15 PSIA dm/dt 5.0 lbm/min 70 °F 300 PSIA N 47 0.90 49.1 °F = (11.5 + 0.8*N)°F 39.1 State T( F) P(psia) x h (Btu/lbm) s(Btu/lbm R) 0 49.1 15 SHV 112.18 0.2504 0.0 0.455 1 39.1 48.93 1.0 107.3 0.2190 11.1 2s 300.00 SHV 123.25 0.2190 0.3148182 2 171.4 300.00 SHV 125.03 0.2218 27.4 0.5711255 3 156.2 300.00 0.0 65.59 0.1254 17.0 4 39.1 48.93 0.50 65.6 0.1354 11.9 0.5009006 Processes (Btu/min) Q W E in E out E dest 1-2 Compressor 0 -89 55 48 7 2-3 Condenser -297 0 125 85 40 3-4 Exp Valve 0 0 85 60 26 4-1 Evaporator 208 0 60 55 4 -89 -89 77 Cycle Analysis 297 Btu/min -12 Btu/min W 89 Btu/min -89 Btu/min 208 Btu/min 77 Btu/min COP 3.346 25.343 0.132 P 0 T H P condensing η compressor T L = T 0 T evaporating °F = T L - 10°F e f (Btu/lbm) Q H E IN E OUT Q L E DEST COP REV. η 2
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Stirling Cycle Engine Parameters m 0.02 lbm mass of working fluid Vmin 0.05 ft^3 minimum volume
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Unformatted text preview: Vmax 0.5 ft^3 maximum volume Thi 250 F temperature during the expansion process Qreg 8 Btu Heat regenerated to/from working fluid Working Fluid Properties k 1.32 ratio of specific heats Cv 2.44 Btu/lbm R constant volume specific heat R 0.7808 Btu/lbm R gas constant Environmental Properties To 77 F environment temperature Po 14.7 psia environment pressure State T (F) T( R) P(psia) v(ft^3/lbm) u(Btu/lbm) s(btu/lbm R) phi (Btu/lbm) 77.00 536.7 14.70 154.04 0.0 0.0 0.00 1 250.0 709.7 1197.8 2.50 422.1-2.536 1370.8 2 250.0 709.7 119.78 25.00 422.1-0.738 467.2 3 86.07 545.7 92.11 25.00 22.1-1.379 411.1 4 86.07 545.7 921.1 2.50 22.1-3.177 1314.8...
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11_Heat_Pump_complete - Vmax 0.5 ft^3 maximum volume Thi...

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