305.20 334.10 314.00 292.C [US /h] 184.00 166.00 224.40 214.10 289.60 271.50 343.60 328.20 396.10 1.04 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 124.90 72.95 34.91 107..-21.68 40.46 67.96 40.00 116.30 40.00 112.90 40.00 105.00 -140.00 -50.00 25.00 25.00 40.00 25.00 50.00 25.00 50.00 25.00 50.00 -157.The throttling valve (in between
305.20 334.10 314.00 292.C [US /h] 184.00 166.00 224.40 214.10 289.60 271.50 343.60 328.20 396.ten 1.04 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 124.90 72.95 34.91 107..-21.68 40.46 67.96 40.00 116.30 40.00 112.90 40.00 105.00 -140.00 -50.00 25.00 25.00 40.00 25.00 50.00 25.00 50.00 25.00 50.00 -157.The throttling valve (between points three and four) reduces pressure from 58.50 bar to 2.53 bar. In [20], the temperature was decreased from -143.0 C to -152.34 C using a temperature difference of -9.34 C. The temperature -152.34 C was not achieved within the power balance carried out herein. In scientific literature, ML-SA1 Neuronal Signaling natural gas liquefaction processes use input Decanoyl-L-carnitine Purity temperatures around -160 C and decrease the valve temperature of 0.five to 3 C [36,37]. Herein, the input and output temperatures of organic gas inside the throttling valve are -155 C and -157.35 C, respectively. The mass flow rate of stream at point 5 needs to be gaseous nitrogen. The mass composition of nitrogen within natural gas is five.65 , which corresponds to 26.09 kg/h out of 461.78 kg/h. Consequently, the mass flow rate regarded as herein is 26.09 kg/h (as an alternative of 45.12 kg/h regarded by [20]). The correction of the mass flow rate of nitrogen at point five will adjust the mass flow price of liquefied organic gas at point 35 and also the mass flow price of your program with refrigerant at points five, 10, and 14. Some temperatures were recalculated thinking of the heat exchangers as adiabatic, which include T11, T14, and T16. The minimum pinch point temperatures at the heat exchangers have been 0.five, 7.9, and 0.7 C for HE-1, HE-2, and HE-3, respectively. The advantage of exergy evaluation is the fact that when you will discover difficulties with all the heat exchanger pinch point, the worth of exergy destruction generated is negative, that is inconsistent. This behavior was reported by [30]. The exergy prices were calculated contemplating physical exergy, as there isn’t any chemical reaction involved. The energy made in expanders 1 and two is 66.39 kW and 29.03 kW at points 36 and 37, respectively. The international power created in the expanders is 95.42 kW at point 38. The energy consumed in refrigerant compressors 1, two, three, and 4 is 38.39 kW, 98.37 kW, 93.87 kW, and 83.70 kW, respectively. The total energy consumed is 314.three kW, because the two expanders make energy, along with the net power consumed is 218.9 kW. The ratio of power consumed is 69.64 . The heat prices of air coolers 1, two, 3, and four are 36.28 kW, 99.81 kW, 96.35 kW, and 87.48 kW, respectively. These results are equivalent to [20].Energies 2021, 14,12 ofThe cost of air coolers is calculated depending on their area and evaluated by their performances, i.e., heat price, Log Imply Temperature Distinction (LMTD), and air volumetric flow price. Table five shows the heat rate, LMTD, air volumetric flow price, area, power consumed, and cost of all air coolers.Table 5. Efficiency information and cost of air coolers. Air Cooler 1 2 3 four Q [kW] 36.28 99.81 96.35 87.48 LMTD [ C] 20.81 34.52 33.40 30.78 V [m3 /s] two.036 3.360 3.244 two..A [m2 ] 9.176 15.220 15.180 14.W [kW] 0.6788 1.1200 1.0810 0.Z [US ] 11,884 14,550 14,537 14,The input air temperature in the air cooler is 25 C. The input refrigerant temperatures are 67.96 C, 116.3 C, 112.85 C, and 104.99 C for AC1, 2, 3, and four, respectively. All output refrigerant temperatures are 40 C. Inside the present operate, the output air temperature was assumed as 40 C for AC1 and C for AC2, three, and four, on account of the reduced input refrigerant temperature of AC1. These 50 temperatures are applied for the.
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