Engineering, 21.02.2020 04:16 yonna74

A refrigerator uses refrigerant-134a as the working fluid and operates on vapor-compression refrigeration cycle. The pressures of the evaporator and condenser are 0.12 MPa and 0.8 MPa, respectively. The isentropic efficiency of the compressor is 0.85. The mass flow rate of the refrigerant is 0.1 kg/s.

Assume that the refrigerator leaves the evaporator as saturated vapor, and leaves the condenser as saturated liquid, and disregard any heat transfer and pressure drops in the connecting lines between the components.

(1) Show the cycle on a T-s diagram with respect to saturation lines; and Determine

(2)the rate of heat removal from the refrigerated space;

(3) the power input to the compressor;

(4)the rate of heat rejection to the environment;

(5) the coefficient of performance (COP)

Answers: 2

Show answers

Other questions on the subject: Engineering

Engineering, 03.07.2019 15:10, EmilySerna

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Answers: 1

continue

Engineering, 04.07.2019 18:10, lillygrl100

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

Answers: 3

continue

Engineering, 04.07.2019 18:10, leomessifanboy678

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Answers: 2

continue

Engineering, 04.07.2019 18:10, samanthabutryn

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan

Answers: 3

continue

You know the right answer?

A refrigerator uses refrigerant-134a as the working fluid and operates on vapor-compression refriger...