A three-stage compressor receives 500 lps of air at 101 kPaa and 27degrees Celcius, and discharges at 750 kPaa. Determine a) the power required; b) the pressure at each intercooler; 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?

A three-stage compressor receives 500 lps of air at 101 kPaa and 27degrees Celcius, and discharges at 750 kPaa. Determine a) the power required; b) the pressure at each intercooler; 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?

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

Air with a pressure of 0.1 MPa and a temperature of 25oC with a flow rate of 5.29 kg/minute enters a three-stage reciprocating piston compressor with intercooler. The air is compressed polytropically (n = 1.3) to reach the pressure of 4 MPa. Calculate: a) The amount of heat transferred to each intercooler? b) How much air is needed for cooling in the intercooler if the allowable maximum temperature changes between the inlet and outlet of the intercooler is 8oC?
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)
a.) What are the different types of fans used in air-conditioning systems? Discuss their applications and relative advantages and disadvantages. b.) Air from an air-conditioned room is exhausted into atmosphere through a grill. The quantity of air passes through the grill is 20 cubic meter minute. The duct area leading to the grill is 0.12 m2. The static pressure behind the grill is 3 mm of water. Find the effective area of grill exhausting the air into atmosphere. Take the pressure loss passing through the grill as 0.5 mm of water. Solve both a and b Asap please , I will rate
5) An auditorium is designed to seat 4500 people. The ventilation rate is 1.62 x 107 ft3/hr of outside air. The outside temperature is 0oF dry bulb, and outside pressure is 14.6 psia. Air leaves the auditorium at 70oF dry bulb. There is no recirculation. The furnace has a capacity of 1,250,000 Btu/hr. The temperature at which the air should enter the auditorium is most nearly
5.0 A 140 x 140-mm, twin-cylinder, single acting refrigerant- 12 compressor running at 600 rpm carries a refrigeration capacity of 40 kW while operating at 350 kPa suction and 1300 kPa discharge pressures. , Assuming the same load to be carried with the same volumetric efficiency and if the discharge pressure shall be raised to 1400 kPa, a) what is the percent increase in mass of R-12 (b)What will be the new volumetric displacement of the compressor the compressor be run? in m/sec ?;(c)At what speed should
(p) W2 T n2 In a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar the to the delivery pressure at the fourth stage will be anteiceol y6) 16 bar 70. For a two stage reciprocating compressor, compression from (a) 1 bar (c) 64 bar (d) 256 bar and no pressure losses. If con
A 3-stage compressor delivers 0.23 kg/s of air. The suction pressure and temperature are 100 kPaa and 27 ̊C, respectively. The discharge pressure is 1380 kPaa. Intercooler is installed after each stage. Determine compressor work in kW. Ans. 59.07 kW
a reciprocating compressor handles 1001 cfm
A four stage single acting air compressor running in an atmospheric at 87 KPa and 15 degrees Celsius has a free air delivery of 2,83 m³/min. The section pressure and temperature are 80 KPa and 32 degrees Celsius respectively, the delivery pressure is to be 7 MPa. The temperature at the start of compression in each stage is 32 degrees Celsius, take n=1,3 for all stages. Calculate 1.the mass flow rate to 3 decimal place in kg/min 2. The power input in KW to 1 decimal place
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?
The following data were obtained from a performance test of a 10 x 9-cm single acting, water jacketed two-stage air compressor: Pressures: Atmospheric, 102 kPaa; leaving first-stage, 634 kPaa; leaving second-stage, 4.20 MPa. Temperatures: Atmospheric, 240C; leaving first-stage, 1080C; entering 2nd stage, 250C; leaving 2nd stage, 1270C Compressor speed, 648 rpm Power input to motor, 5.65 kW Motor and belt efficiency, 81.5% The following are calculated from test data: Air flow rate, 0.387 ??⁄??? Compression exponents: 1st stage 1.15; 2nd Stage, 1.2 Calculate: a) Approximate indicated power b) Power for isothermal compression c) Shaft power d) 1st stage piston displacement e) Actual volumetric efficiency f) Isothermal compression efficiency g) Mechanical efficiency based on the approximate indicated power h) Over-all efficiency of the compressor
A two-stage compressor receives 672 lpm at 140 kPaa and 27 °C and delivers it at690 kPaa. The Compression is polytropic with n = 1.5 and the intercooler is deal. Finda) the power required; b) the intercooler pressure; c) the maximum temperature; d) theheat transferred in the intercooler; and e) the discharge temperature if the compressoris single stage.