A two-cylinder R-134a compressor operating at 1500 rpm. The evaporator temperature is (-6°C) and the condensing temperature is 35°C? The bore and stroke of the compressor are 106.3 by 115.6 mm. The compressor can handle a refrigerating capacity of 105.8 tons. Determine volumetric efficiency and the power of compressor if the discharge enthalpy is 433 kJ/kg.

A two-cylinder R-134a compressor operating at 1500 rpm. The evaporator temperature is (-6°C) and the condensing temperature is 35°C? The bore and stroke of the compressor are 106.3 by 115.6 mm. The compressor can handle a refrigerating capacity of 105.8 tons. Determine volumetric efficiency and the power of compressor if the discharge enthalpy is 433 kJ/kg.

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

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 20RQ: Welded ______sealed compressors are normally used in household refrigerators.

See similar textbooks

Similar questions

Condensers in these refrigerators are all_______cooled.
A R-12 compressor operates betwwen eveoperating temperature of 4 c ( hg = 353 kj/kg ), vg = 0.04895) and condensing temperature of 43 c ( hf = 241.6 kj/kg ).determine the bore diameter of the 4 cylinder 1000 rpm compressor if the piston speed is 200 meter/min and actual volumeter efficiency is 82% and refrigeration load is 25 tons
A three-stage compressor receives 500 lps of air at 101 kPaa and 27 oC, anddischarges at 750 kPaa. Determine a) the power required; b) the pressure at eachintercooler; c) the maximum temperature; and d) the heat transferred in each intercooler.e) What is the discharge temperature of a single-stage compressor operating at the same intake and discharge temperatures?(answers for Letter D and E Thank you)
Can you also show the P-s and T-s diagram? Catalogue data for R-134A compressor with a displacement of 75 L/s show the capacity to be 8 tons when the suction conditions are 0.1 MPa and -20°C and condensing temperature is 50°C. The refrigerant leaves the condenser as saturated liquid. Calculate the actual volumetric efficiency and the brake work of the compressor if the compressor efficiency is 70%
In an ammonia refrigerator , the pressure in the evaporator is 267. 58 KPa and theammonia at is 0.14 dry while at the exit is 0.86 dry . During compression the work done per kgof ammonia is 20 ,000 kg .m . Calculate volume of the vapor entering the compressor per minuteif the rate of ammonia circulation is 6.54 kg. The compressor has a volumetric efficiency of 90%and it runs at 150 rpm .The ratio of stroke to bore is 1 .Latent enthalpy of ammonia at basedon its evaporating pressure is 320 Kcal per kg and its latent specific volume of ammonia basedon its evaporating pressure is 0.436 m3 per kg .Specific volume of ammonia .A) 2.23 C) 2.46B) 3.23 D) 4.62
For a 10-ton-capacity refrigeration system, the pressure of refrigerant in the evaporator is 210 kPa, whereas in the condenser it is 800 kPa. If R-314a is used under saturated conditions, calculate the theoretical power required to operate the compressor.
The refrigerant R-134a enters the compressor of a refrigeration machine at a pressure of 140kPa and a temperature of -10°C, and exits at a pressure of 1MPa. The volumetric flow rate of the refrigerant entering the compressor is 0.23m3/minute. The refrigerant enters the throttling valve at 0.95MPa pressure and 30 °C, and exits the evaporator as saturated steam at -18 °C. The adiabatic efficiency of the compressor is 78%. Show the cycle in the T-s diagram. a) The power required to operate the compressor, b) Calculate the heat withdrawn from the cooled environment in unit time, COPsm=? c) Calculate how much the pressure of the refrigerant drops between the evaporator and the compressor and how much the heat gain is
For a 10-ton-capacity refrigeration system, the pressure of refrigerant in the evaporator is 150 kPa, whereas in the condenser it is 950 kPa. If refrigerant R-134a is used under saturated conditions, calculate the theoretical power required to operate the compressor = ... KW
For R-410A refrigerant, which operates at a flow rate of 0.102 kg/s. It is known that saturated vapor enters the compressor at -40ºC and that saturated liquid leaves the condenser at 0ºC. The refrigerant operates in the saturation region. Determine: a) The compression power. b)The cooling power. c) The coefficient of performance.
A supercritical power plant generates steam at 25 Mpa and 560C. The condenser pressure is 7.0 kpa. Determine the exit quality of steam if it expands through a turbine in this power plant.
What is the theoretical minimum pressure possible in the condenser if it is being cooled byriver water at 15 degrees celcius? Can you please explain why?
A three-stage compressor receives 500 lps of air at 101 kPaa and 27degrees Celcius, anddischarges at 750 kPaa. Determine a) the power required; b) the pressure at eachintercooler; c) the maximum temperature; and d) the heat transferred in each intercooler. e) What is the discharge temperature of a single-stage compressor operating at the sameintake and discharge temperatures?