Low-Grade Heat Conversion into Power Using Small Scale Organic Rankine Cycles

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Low-Grade Heat Conversion into Power Using Small Scale Organic Rankine Cycles ( low-grade-heat-conversion-into-power-using-small-scale-organ )

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Table 4.8 - Comparison of the performances of different working fluids for a 2 kW power output . VFR ν . . . PPV..2 ηηφQΔhfg min max PR 2 (m3/kg) mwf th II Itot uhx x2 Substance Type* [MPa] [MPa] [m3/h] (V2/V1) [kg/s] [%] [%] [%] [kW] [kW] [kJ/kg] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 RC318 d 0.425 1.201 2.825 39.48 3.294 0.028 0.381 3.715 21.76 61.48 5.104 47.01 75.83 1 R600a d 0.463 1.191 2.57 39.02 2.802 0.088 0.122 4.055 23.75 71.07 4.579 44.20 255.7 1 R114 d 0.290 0.826 2.84 55.57 3.025 0.050 0.305 4.122 24.14 70.96 4.659 45.04 104.6 1 R600 d 0.329 0.907 2.758 50.36 2.893 0.128 0.108 4.236 24.81 74.21 4.462 43.91 300.2 1 R601 d 0.098 0.323 3.285 141 3.307 0.369 0.106 4.367 25.58 76.65 4.501 44.67 323 1 R113 d 0.065 0.232 3.558 197.7 3.52 0.215 0.254 4.456 26.1 77.85 4.391 44.11 134.8 1 Cyclohexane d 0.020 0.084 4.232 557.7 4.038 1.58 0.098 4.609 27 81.8 4.206 43.17 360 1 R290 w 1.218 2.85 2.34 16.99 2.717 0.037 0.127 3.428 20.08 63.1 4.614 42.43 210.4 0.987 R407C w 1.535 3.735 2.433 13.34 2.611 0.014 0.250 3.087 18.08 59.3 5.155 45.26 102.9 0.913 R32 w 2.19 5.417 2.474 9.019 3.015 0.011 0.212 2.611 15.3 46.51 4.724 40.79 89.28 0.728 R500 w 1.001 2.475 2.473 18.98 2.72 0.020 0.256 3.712 21.74 68.13 4.508 42.53 113.1 0.987 R152a w 0.794 2.108 2.652 21.95 2.839 0.039 0.154 3.985 23.34 71.81 4.443 42.92 200.2 0.977 R717(Ammonia) w 1.351 3.709 2.746 11.87 2.627 0.087 0.037 4.352 25.49 81.85 4.121 41.63 907.5 0.917 Ethanol w 0.013 0.088 6.468 610.6 5.841 3.951 0.042 4.796 28.09 88.2 3.932 41.59 854.6 0.982 Methanol w 0.027 0.148 5.416 336.1 4.725 2.704 0.034 4.845 28.38 90.77 3.856 41.14 1082 0.952 R718(Water) w 0.005 0.038 6.854 1413 5.784 23.93 0.016 4.899 28.7 93.28 3.793 40.81 2321 0.949 R134a i 0.887 2.366 2.666 20.1 3.056 0.022 0.244 3.703 21.69 64.94 4.651 43.57 115.8 0.992 18 R12 i 0.847 2.086 2.463 22.43 2.679 0.020 0.301 3.835 22.46 70.06 4.465 42.60 99.15 1 19 20 R123 i 0.130 0.431 3.298 104.9 3.304 0.128 0.227 4.457 26.11 77.48 4.318 43.54 148.2 1 R141b i 0.112 0.371 3.309 121.7 3.234 0.195 0.173 4.526 26.51 80.21 4.242 43.17 199.7 1 *(i: isentropic; w: wet; d: dry) Page | 95

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