Calculate coefficient of performance of this refrigerator

Assignment Help Mechanical Engineering

Reference no: EM13702381

It is claimed that a refrigerator requiring 400 W of power (W) receives heat from cold storage (low temperature source, TL) at 200 K and rejects heat at the rate of 600 W (QH) to an environment at 600 K (high temperature reservoir, TH).

A. Calculate the amount of rate of heat (QL) the refrigerator receives from the cold storage.

B. Calculate the coefficient of performance of this refrigerator.

C. Calculate the ideal (maximum) coefficient of performance of a refrigerator operating between the given two temperature (200 and 600 K) sources.

D. Is this claim valid or false? Why?

Reference no: EM13702381

Questions Cloud

Calculate uncertainty in resistance of resultant circuits : Two resistors, R 1 = 100.0 ± 0.2 ? and R2 = 50.0 ± 0.1 ?, are connected (a) in series and (b) in parallel. Calculate the uncertainty in the resistance of the resultant circuits. What is the maximum possible error in each case?

Calculate the exit velocity of the nozzle : Air at 1000K and 400 kPa enters the insulated nozzle of a turbo-jet engine. Because the plane is flying at an altitude, the exit pressure is only 80 kPa. Calculate the exit velocity of the nozzle if its isentropic efficiency is 93%. Report answer in ..

The bolt pattern shown has combined direct shear and torsion : The bolt pattern shown has combined direct shear and torsion. Assuming the load on the bolts cause by the force P is not negligible, which bolt (A, B, or C) takes the most shear force?

Calculate the power produced for the same inlet conditions : An engine, having 90% efficiency, produces 25 MW power. Calculate the power produced for the same inlet conditions and exit pressure if efficiency of engine is increased to 98% by redesigning it.

Calculate coefficient of performance of this refrigerator : It is claimed that a refrigerator requiring 400 W of power (W) receives heat from cold storage (low temperature source, TL) at 200 K and rejects heat at the rate of 600 W (QH) to an environment at 600 K (high temperature reservoir, TH). Calculate the..

Power requirement for same inlet conditions-exit pressure : A compressor, having 80% efficiency, requires 25 MW power to pressurize air. Calculate the power requirement for the same inlet conditions and exit pressure if the compressor is made isentropic by redesigning it

What is the internal rate of return : What is the internal rate of return of a project that costs $45000 if it is expected to generate $15047 per year for five years.

Maximum shear stress at the outer surface of the cylinder : A cylinder with a 0.3 m inner diameter and 0.4 m outer diameter is internally pressurized to 140 MPa. Determine the maximum shear stress at the outer surface of the cylinder.

Calculate overall heat transfer coefficient of material mild : Calculate overall heat transfer coefficient (U) of material mild steel for a heat transfer from hot water to air at ambient temperature where thinkness is 1.5 mm (avg temp of hot water is 75C and air is 56C) not by using Q = U A log mean temperature ..

User Account

All Pages