The temperature limits of a CO2 refrigerating plants are 25°C and -10°C. If the vapour is dry at the end of compression, calculate COP, the capacity of the refrigeration plant, if 4 kg/min fluid is circulated in the system. Use the following CO2 table. Also, draw the p-h and T-s diagram Temp Liquid Liquid entropy Vapour entropy Vapour enthalpy Latent in °C enthalpy enthalpy Sf in kJ/kg K Sg in kJ/kg K h; in kJ/kg hig in kJ/kg h, in kJ/kg 25 81.3 121.4 202.6 0.251 0.63 |-10 |-7.54 245.3 237 -0.042 0.84

The temperature limits of a CO2 refrigerating plants are 25°C and -10°C. If the vapour is dry at the end of compression, calculate COP, the capacity of the refrigeration plant, if 4 kg/min fluid is circulated in the system. Use the following CO2 table. Also, draw the p-h and T-s diagram Temp Liquid Liquid entropy Vapour entropy Vapour enthalpy Latent in °C enthalpy enthalpy Sf in kJ/kg K Sg in kJ/kg K h; in kJ/kg hig in kJ/kg h, in kJ/kg 25 81.3 121.4 202.6 0.251 0.63 |-10 |-7.54 245.3 237 -0.042 0.84

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Air conditioner using R-22 works on the condensing evaporating pressures of 99.36 psia and 19.62 respectively. The nvc is equal to ( 50%) if m= 4%, Tcy= 20 F , y=1.3 and A p= 1.2. O True False
Air conditioner using R-22 works on the condensing and evaporating temperatures of 50 F and -30 F respectively. Therefore the saturated liquid pressure is (99.36 psia). O True False
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Evaporative condenser is used only air as condensing medium to condense the hot vapour refrigerant. * True False
In the vapor compression refrigeration system, superheating in the evaporator; increase the (COP ) of the system. O decrease the pressure. O decrease the ( COP ) of the system. O increase the refrigeration cost of the system.
Please describe the most important aspects of RAC and explain why you should make use of it.