Problem:An ammonia refrigerating system shown inthe figure is composed of three evaporatorsand arranged with multiple expansion valvesand intercoolers. The load and operatingtemperature of each evaporator are shownin the table below:condenserevaporator 3compressor 3intercooler 2evaporator 2compressor 2Infercooler 2liquidevaporator 1compressor 1EvaporatorLoad, tonsEvaporatorTemperature, °C130- 3020- 2015- 10Condensing pressure is 1200 kPa. Refrigerant vapor exits evaporator no. 1 with a 10 - degreesuperheat. Saturated conditions exist at the exits of the evaporator no. 2 and evaporator no.3. Liquid refrigerant leaves the condenser at 28°C. Determinea. the mass flow rate in evaporator 1kg/sb. the mass flow rate in evaporator 2kg/sc. the mass flow rate in evaporator 3kg/s

Refrigerant =Ammonia R717Condenser pressure, Pc=1200 kPaEvaporator 1 temperature,…

Condensing pressure is 1200 kPa. Refrigerant vapor exits evaporator no. 1 with a 10- degree superheat. Saturated conditions exist at the exits of the evaporator no. 2 and evaporator no. 3. Liquid refrigerant leaves the condenser at 28°C. Determine a. the mass flow rate in evaporator 1 kg/s b. the mass flow rate in evaporator 2 kg/s c. the mass flow rate in evaporator 3 kg/s

Condensing pressure is 1200 kPa. Refrigerant vapor exits evaporator no. 1 with a 10- degree superheat. Saturated conditions exist at the exits of the evaporator no. 2 and evaporator no. 3. Liquid refrigerant leaves the condenser at 28°C. Determine a. the mass flow rate in evaporator 1 kg/s b. the mass flow rate in evaporator 2 kg/s c. the mass flow rate in evaporator 3 kg/s

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 9RQ: The evaporator design temperature may in some cases operate at a slightly ____(higher or lower)...

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