Chapter 9, Problem 9.123EP

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determine the C.O.P of the simple vapor compression refrigeration cycle R-717. The evaporation temperature is -10˚C and the condenser temperature is 40˚C. COP =

Please answer with complete solution. Thanks A refrigeration system using refrigerant 12 is to have a refrigerating capacity of 80 kW. The cycle is a standard vapor-compression cycle in which the evaporating temperature is -15°C and the condensing temperature 30°C. Determine the discharge compressor pressure in kPaa.

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Question 2 of 4 - / 25 An office building requires a heat transfer rate of 30 kW to maintain theinsidetemperature at 21°Cwhen theoutsidetemperature is O°C. Avapor-compression heat pump with Refrigerant 134a astheworkingfluid isto beused to provide the necessary heating. The compressoroperates adiabatically with an isentropic efficiency of 82%. Determine appropriate evaporator and condenser pressures of a cyclefor this purpose assuming ATcond = ATevap = 10°C, as shown in the T-sdiagram. The refrigerantexitstheevaporator assaturated vapor and exitsthecondenser as saturated liquid at the respective pressures. AT cond Outside air 21°C 0°C Inside air ATent Condenser Evaporator Expansion valve Compressor Step 1 Determinethe mass flow rate of refrigerant, in kg/s. m = kg/s Attempts: unlimited Submit Answer Save for Later Using multiple attempts will impact your score. 5% score reduction after attempt 2 Step 2 The partsof thisquestion must becompleted in order. This partwill be availablewhen…

In a R-134a based refrigeration system the cycle operates in the temperature range of 40°c and - 20°c. Find COP of the system if the vapor is dry and saturated .hile entering the compressor. Assume mass flow rate of refrigerant is 1 kg/s.

A simple saturated refrigerating cycle for R-12 system operates at an evaporating temperature of -5 ⁰C and a condensing temperature of 40⁰C. Show the effects of superheating the suction vapor from -5⁰C to 15⁰C.

A two-stage cascade refrigeration system uses ammonia as the working substance. The evaporator is at -40 deg C and the high-pressure condenser is at 2035.9 kPa. The cascade condenser is a direct-contact type. The refrigeration load is 90 tons.compute for the cascade condenser pressure in kPa for minimum work. compute for the mass flow rate of the refrigerant in the low pressure loop. compute for the mass flow rate of the refrigerant in the high pressure loop.compute for the power requirement in the low stage loop. compute for the power requirement in the high stage loop. compute the total power requirement for the system. compute the COP for the system. compute the percentage of quantity of the fluid entering the evaporator.