5- A refrigeration machine uses Freon R-502, evaporating temperature is -10 °C,condensing temperature is 40 °C, and refrigeration capacity is 38 TR. Therefrigerant leaves the evaporator with 8 °C superheating and sub-cooled incondenser with 8 °C lower than saturation temperature. The compressor isreciprocating, single acting, number of cylinders of 4, clearance factor of 5 %,number of revolution of 1150 rpm, mechanical efficiency of 0.80, and cylinderdimensions L/D is 1.27. The compression is adiabatic with h₁ = 0.9. Thepressure drop in suction valve is 0.3 bar and delivery valve is 0.5 bar. Thecondenser is cooled with water and the water temperature raises 8 °C in thecondenser. Estimate refrigerant mass flow rate, compressor power, cylinderdimensions, condenser heat load, and the coefficient of performance.

Part 2:Explanation:Step 1: Calculate the refrigeration effect per kg of refrigerant.- The enthalpies…

Answered: 5- A refrigeration machine uses Freon…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Define C.O.P. of the simple vapor compression refrigeration cycle R-134a. The evaporation temperature is -15 ° C and the condenser temperature is 40 ° C. COP =
9. A 9.5 tonnes capacity of ammonia refrigerator operates between evaporator and condenser temperature of -13°C and 28°C is needed in a food storage locker. The refrigerant is sub-cooled by 4°C before entering the expansion valve. The vapour is 0.90 dry as it leaves the evaporator coil. The compression in the compressor is adiabatic type. Using p-h chart find (i) Condition of vapour at outlet of the compressor (ii) Condition of vapour at entrance to evaporator (iii) С.О.Р. (iv) Power required in kW Neglect valve throttling and clearance effect.
In a refrigerant 12 system which serves a 250 kw evaporator at -30°C. The system uses two stage compression with intercooling and removal of flash gas. The condenser temp is 40°C. h2 = 357 kJ/kg, h4 = 365 kJ/kg Compute the ff:- mass flow rate at low stage compressor (m1), answer must be in kg/s- mass flow rate at high stage compressor (m3), answer must be in kg/s- low stage compressor work, answer must be in kw
Define C.O.P. of the simple vapor compression refrigeration cycle R-717. The evaporation temperature is -15 ° C and the condenser temperature is 40 ° C. COP =
In a Refrigerant 11 system ,one evaporator is to provide 210 kw of refrigerant at 0 0C and another evaporator is to provide 224 kw at -200C . The system uses two stage compression with intercooling and removal of flash gas. The condenser temp is 400C . Given that, h2=389kJ/kg, h4=416kJ/kg Compute the following: a.) mass flow rate at low stage compressor (m1)ANSWER: 1.25377 kg/s b.) mass flow rate at high stage compressor (m3)ANSWER: 2.90255 kg/s c.) low stage compressor workANSWER: 12.96406 kw d.) high stage compressor workANSWER: 78.68819 kw e.) total compressor workANSWER: 91.65226 kw f.) COPANSWER: 4.73528 g.) heat rejected in the condenserANSWER: 525.65226 kw
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)
What is the answer of the following asked: (need solution ASAP, thank you)The heat rejected in the condenser in kJ/kg is:The net work in the turbine in kJ/kg is:
The food storage room requires a cooling system with a capacity of 10 tons of refrigeration that operates at an evaporator temperature of -17.8 ° C and a condenser temperature of 30.1 ° C. The refrigerant used is R-717 and the system operates in saturated conditions. Determine C.O.P , Refrigerant flow rate , Heat loss rate in condenses
Please solve for the COP
Cold storage uses R134a, the evaporator temperature is -7C and the condenser temperature is 32C. The cooling load is 5.3103 kJ/min. The cycle is ideal. Determine: 1. Mass flowrate of the refrigerant. 2. Coefficient of Performance (COP). - If the water condenser is used that enter at 24C and exit at 30C. determine the water flowrate.
REFRIGERATION In a freon-22 refrigeration system, the capacity is 20 tons at a temperature of -20°C. The vapor from the evaporator is pumped by one compressor to the condensing pressure of 40C. Later, the system was revised to a two-stage compression operating on the cycle with intercooling but no removal of flash . Answer the ff: a. Calculate the power required by the single compressor in the original system. b. Calculate the total power required by the two compressors in the revised system.

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