1. Engineering
  2. Mechanical Engineering
  3. a refrigeration system operating on r134a operates with an evaporating...

Question: a refrigeration system operating on r134a operates with an evaporating...

Question details

enicieht of performance 6.5 the volume flow rate 6.6 the power per kW of refrigeration : and 6.7 th e volume flow rate measured at the compressor suction e compressor discharge temperature. QUESTION 2 A refrigeration system operating on R134a operates with an evaporating temperature of -5°C and a condensing temperature of 45 C. The pressure drop through the evaporator is 38 kPa, through the liquid line from the receiver to the evaporator 120 kPa, through the suction line and suction valves 25 kPa, though the hot gas line and condenser 132 kPa and through the discharge valves 57 kPa. In addition, there is a suction line superheat of 8K with a sub-cooling in the condenser of 5K. When operating with a heat load of 25 kW, calculate 2.1 the mass flow rate of refrigerant (4) 2.2 the volume flow rate at the compressor inlet; (3) 2.3 the heat of compression 2.4 the theoretical compression kW; (2) 2.5 the coefficient of performance and (2) 2.6 the total heat rejection in the condenser. (2) Question 2 )に1,7671 Compare the compressor power requirements of a R22-refrigeration plant operating at a constant saturated suction temperature of 0°C with a constant capacity of 100 KW

A refrigeration system operating on R134a operates with an evaporating temperature of -5°C and a condensing temperature of 45°C. The pressure drop through the evaporator is 38kpa, through the liquid line from the receiver to the evaporator 120 kpa, through the suction line and suction valve 57 kpa. in addition, There is a suction line superheat of 8k with sub-cooling in the condenser of 5k. when operating with heat load of 25k.

2.1 calculate mass flow rate of refrigerant
2.2 the volume flow rates of compressor inlet
2.3 heat of compression
2.4 Theoretical compression
2.5 coefficient of performance
2.6 total heat rejection in the condenser

NB: With regards to the above question can you kindly explain in details on how you get all the h1,h2,h3 and h4 values.... it would be lovely if you can show me in a steam table or steam chart because i get lost Thankx

Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution