Condenser Compressor stage 2 Q2- Find the coefficient of performance for the fallowing cycle and coefficient of performance of simple refrigeration cycle for same temperatures at evaporator and condenser R-134a sat. vapor 20C Mixing chamber Flash chamber Sat. liquid -20°C Compressor stage 1 vaporator

Condenser Compressor stage 2 Q2- Find the coefficient of performance for the fallowing cycle and coefficient of performance of simple refrigeration cycle for same temperatures at evaporator and condenser R-134a sat. vapor 20C Mixing chamber Flash chamber Sat. liquid -20°C Compressor stage 1 vaporator

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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Question#1 Pressure-enthalpy chart is another method to obtain an initial performance estimation of refrigeration/heat pump cycles used in heating, ventilation and air-conditioning (HVAC) system. Your role is to provide design and installation services for air -conditioning (AC) system a preliminary performance estimation. Given the following design specifications: Refrigerant HFC-134a as the working fluid - Ideal cycle operation condition is assumed - Cycle is operated at high pressure line of 0.8 MPa Cycle is operated at low temperature line of – 10° C Flow rate is 0.1 kg/sec The head of the department in the company that you are working in asked you to make use of pressure -enthalpy chart provided for HFC-134a refrigerant Task.1 2. Estimate the COPR 3. Determine the low-pressure line value.
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Specify the C.O.P. of the cycle vapor compression refrigeration simple R-134a. Temperature evaporation is -10 °C and the temperature of the condenser is 30 °C. (COP is found using enthalpy)
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using the values given in the two evaporator refrigeration systema) Draw the T-s diagram. (evaporator output saturated steam, condenser output saturated liquid, compressor isentropic efficiency is 0.8)b) Find the coefficient of performance (COP).
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8 Calculate the COP value for the vapor compression refrigeration cycle where Th=10C and Tc=-20C.
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B-Draw the ideal vapour compression refrigeration cycle on T-S and P-H diagrams. State all details on the diagrams and give a short explanation of each process of the cycle.
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Specify The C.O.P. of the cycle refrigeration vapor compression a simple R-717. Temperature evaporation is -20 °C and the temperature of the condenser is 30 °C (C.O.P is found using enthalpy)
Refrigerant 12 Condensing temperature = 46.2 oCEvaporating temperature = -3 oCTemperature of the suction vapor = -15.6oCRefrigerating Capacity for evaporator = 44 TONDetermine the COP