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434 An air-conditioning system is shown in Fig. P4.54 in which air flows over tubes carrying Refrigerant 134a. Air enters with a volumetric flow rate of 50 m³/min at 32ºC, 1 bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a quality of 20% and exits at 5 bar, 20°C. Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at steady state R-134a Py=5 bar =0.20 a. the mass flow rate of the refrigerant, in kg/min. b. the rate of heat transfer, in kJ/min, between the air and refrigerant. 1 Air P₁1 bar T₁-32°C 305 K (AV), -50 m/min Air 2+P 0.95 bar 7₁-22°C-295 K FIGURE P454 R-134a P-5 bar 7₁-20°C

434 An air-conditioning system is shown in Fig. P4.54 in which air flows over tubes carrying Refrigerant 134a. Air enters with a volumetric flow rate of 50 m³/min at 32ºC, 1 bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a quality of 20% and exits at 5 bar, 20°C. Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at steady state R-134a Py=5 bar =0.20 a. the mass flow rate of the refrigerant, in kg/min. b. the rate of heat transfer, in kJ/min, between the air and refrigerant. 1 Air P₁1 bar T₁-32°C 305 K (AV), -50 m/min Air 2+P 0.95 bar 7₁-22°C-295 K FIGURE P454 R-134a P-5 bar 7₁-20°C

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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4-340 An air-conditioning system is shown in Fig. P4.54 in which air flows over tubes carrying Refrigerant 134a. Air enters with a volumetric flow rate of 50 m³/min at 32ºC, 1 bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a quality of 20% and exits at 5 bar, 20°C. Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at steady state R-134a Py = 5 bar *₁ = 0.20 a. the mass flow rate of the refrigerant, in kg/min. b. the rate of heat transfer, in kJ/min, between the air and refrigerant. Air P₁ = 1 bar T₁= 32°C = 305 K (AV), - 50 m²/min Air 2+₂=0.95 bar 7₂-22°C= 295 K FIGURE P454 R-134a P4-5 bar 7₁-20°C
Transcribed Image Text:4-340 An air-conditioning system is shown in Fig. P4.54 in which air flows over tubes carrying Refrigerant 134a. Air enters with a volumetric flow rate of 50 m³/min at 32ºC, 1 bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a quality of 20% and exits at 5 bar, 20°C. Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at steady state R-134a Py = 5 bar *₁ = 0.20 a. the mass flow rate of the refrigerant, in kg/min. b. the rate of heat transfer, in kJ/min, between the air and refrigerant. Air P₁ = 1 bar T₁= 32°C = 305 K (AV), - 50 m²/min Air 2+₂=0.95 bar 7₂-22°C= 295 K FIGURE P454 R-134a P4-5 bar 7₁-20°C
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