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Refrigerant-134a enters the condenser at 200 kPa and 100C and it leaves at 200 kPa with a quality of 45 percent in a heat pump. The load of heat pump is 700 W and COP of the heat pump is 3.5, determine:   The rate of heat gains from the environment The minimum compressor work The mass flow rate of the refrigerant

Refrigerant-134a enters the condenser at 200 kPa and 100C and it leaves at 200 kPa with a quality of 45 percent in a heat pump. The load of heat pump is 700 W and COP of the heat pump is 3.5, determine:   The rate of heat gains from the environment The minimum compressor work The mass flow rate of the refrigerant

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Refrigerant-134a enters the condenser at 200 kPa and 100C and it leaves at 200 kPa with a quality of 45 percent in a heat pump. The load of heat pump is 700 W and COP of the heat pump is 3.5, determine:

 

  • The rate of heat gains from the environment
  • The minimum compressor work
  • The mass flow rate of the refrigerant
Thermodynamics 902 TABLE A-11 Saturated refrigerant-134a-Temperature table Specific volume, m3/kg Enthalpy, kJ/kg Internal energy, kJ/kg Sat. Sat. Sat. Sat. Sat. liquid, Evap., h, Sat. Sat. vapor, Evap., vapor, liquid, Ufg liquid, vapor, Temp., press.., T°C Pat kPa vf Uf 0.0007054 0.36081 0.0007083 0.32732 0.0007112 0.29751 0.0007142 0.27090 0.0007172 0.24711 -0.036 207.40 207.37 2.475 206.04 208.51 4.992 204.67 209.66 7.517 203.29 210.81 0.000 225.86 225.86 2.515 224.61 227.12 5.037 223.35 228.39 7.566 222.09 229.65 220.81 230.91 51.25 56.86 -40 -38 -36 -34 62.95 69.56 76.71 10.05 201.91 211.96 10.10 -32 0.0007203 0.22580 0.0007234 0.20666 0.0007265 0.18946 0.0007297 0.17395 0.0007329 0.15995 12.59 15.13 17.69 20.25 200.52 213.11 12.65 219.52 232.17 218.22 233.43 216.92 234.68 C 215.59 235.92 214.26 s237.17 -30 84.43 199.12 214.25 15.20 197.72 215.40 17.76 92.76 -26 101.73 -24 111.37 -22 121.72 -28 196.30 216.55 20.33 194.88 217.70 22.91 22.82 193.45 218.84 25.49 212.91 238.41 0.0007362 0.14729 0.0007396 0.13583 25.39 -20 132.82 -18 144.69 -16 157.38 27.98 30.57 192.01 219.98 28.09 190.56 221.13 30.69 211.55 239.64 0.0007430 0.12542 210.18 240.87 -14 0.0007464 0.11597 33.17 189.09 222.27 33.30 187.62 223.40 35.92 170.93 208.79 242.09 -12 185.37 0.0007499 0.10736 35.78 207.38 243.30 -10 200.74 -8 217.08 -6 234.44 -4 252.85 -2 272.36 0.0007535 0.099516 38.40 Q.0007571) 0.092352 41.03 0.0007608 0.085802 43.66 0.0007646 0.079804 46.31 0.0007684 0.074304 48.96 186.14 224.54 38.55 205.96 244.51 204.52 245.72 203.07 246.91 201.60 248.10 200.11 249.28 184.64 225.67 41.19 183.13 181.61 180.08 229.04 49.17 226.80 43.84 227.92 46.50 O 293.01 0.0007723 0.069255 51.63 178.53 230.16 51.86 176.97 231.27 54.55 175.39 232.38 57.25 173.80 233.48 59.97 172.19 234.58 62.69 198.60 250.45 197.07 251.61 2 314.84 0.0007763 0.064612 54.30 0.0007804 0.060338 56.99 0.0007845 0.056398 59.68 0.0007887 0.052762 62.39 4 337.90 195.51 252.77 6 362.23 8 387.88 193.94 253.91 192.35 255.04 10 414.89 12 443.31 14 473.19 16 504.58 18 537.52 0.0007930 0.049403 65.10 0.0007975 0.046295 67.83 0.0008020 0.043417 70.57 0.0008066 0.040748 73.32 0.0008113 0.038271 76.08 170.56 235.67 65.43 168.92 236.75 68.18 167.26 237.83 70.95 165.58 238.90 73.73 163.88 190.73 256.16 C 189.09 257.27 187.42 258.37 185.73 259.46 184.01 260.53 C 239.96 76.52
Transcribed Image Text:Thermodynamics 902 TABLE A-11 Saturated refrigerant-134a-Temperature table Specific volume, m3/kg Enthalpy, kJ/kg Internal energy, kJ/kg Sat. Sat. Sat. Sat. Sat. liquid, Evap., h, Sat. Sat. vapor, Evap., vapor, liquid, Ufg liquid, vapor, Temp., press.., T°C Pat kPa vf Uf 0.0007054 0.36081 0.0007083 0.32732 0.0007112 0.29751 0.0007142 0.27090 0.0007172 0.24711 -0.036 207.40 207.37 2.475 206.04 208.51 4.992 204.67 209.66 7.517 203.29 210.81 0.000 225.86 225.86 2.515 224.61 227.12 5.037 223.35 228.39 7.566 222.09 229.65 220.81 230.91 51.25 56.86 -40 -38 -36 -34 62.95 69.56 76.71 10.05 201.91 211.96 10.10 -32 0.0007203 0.22580 0.0007234 0.20666 0.0007265 0.18946 0.0007297 0.17395 0.0007329 0.15995 12.59 15.13 17.69 20.25 200.52 213.11 12.65 219.52 232.17 218.22 233.43 216.92 234.68 C 215.59 235.92 214.26 s237.17 -30 84.43 199.12 214.25 15.20 197.72 215.40 17.76 92.76 -26 101.73 -24 111.37 -22 121.72 -28 196.30 216.55 20.33 194.88 217.70 22.91 22.82 193.45 218.84 25.49 212.91 238.41 0.0007362 0.14729 0.0007396 0.13583 25.39 -20 132.82 -18 144.69 -16 157.38 27.98 30.57 192.01 219.98 28.09 190.56 221.13 30.69 211.55 239.64 0.0007430 0.12542 210.18 240.87 -14 0.0007464 0.11597 33.17 189.09 222.27 33.30 187.62 223.40 35.92 170.93 208.79 242.09 -12 185.37 0.0007499 0.10736 35.78 207.38 243.30 -10 200.74 -8 217.08 -6 234.44 -4 252.85 -2 272.36 0.0007535 0.099516 38.40 Q.0007571) 0.092352 41.03 0.0007608 0.085802 43.66 0.0007646 0.079804 46.31 0.0007684 0.074304 48.96 186.14 224.54 38.55 205.96 244.51 204.52 245.72 203.07 246.91 201.60 248.10 200.11 249.28 184.64 225.67 41.19 183.13 181.61 180.08 229.04 49.17 226.80 43.84 227.92 46.50 O 293.01 0.0007723 0.069255 51.63 178.53 230.16 51.86 176.97 231.27 54.55 175.39 232.38 57.25 173.80 233.48 59.97 172.19 234.58 62.69 198.60 250.45 197.07 251.61 2 314.84 0.0007763 0.064612 54.30 0.0007804 0.060338 56.99 0.0007845 0.056398 59.68 0.0007887 0.052762 62.39 4 337.90 195.51 252.77 6 362.23 8 387.88 193.94 253.91 192.35 255.04 10 414.89 12 443.31 14 473.19 16 504.58 18 537.52 0.0007930 0.049403 65.10 0.0007975 0.046295 67.83 0.0008020 0.043417 70.57 0.0008066 0.040748 73.32 0.0008113 0.038271 76.08 170.56 235.67 65.43 168.92 236.75 68.18 167.26 237.83 70.95 165.58 238.90 73.73 163.88 190.73 256.16 C 189.09 257.27 187.42 258.37 185.73 259.46 184.01 260.53 C 239.96 76.52
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