✖Refrigeration capacity is a measure of the effective cooling capacity of a refrigerator.ⓘ Refrigeration Capacity [R_E]			+10% -10%
✖Compressor work done is the work done by the compressor.ⓘ Compressor work done [W]			+10% -10%

✖Heat Rejection Factor is the load on the condenser per unit of refrigeration capacity.ⓘ Heat Rejection Factor [HRF]

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Formula

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Heat Rejection Factor

Formula

`"HRF" = ("R"_{"E"}+"W")/"R"_{"E"}`

Example

`"1.6"=("1000J/min"+"600J/min")/"1000J/min"`

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Heat Rejection Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Heat Rejection Factor = (Refrigeration Capacity+Compressor work done)/Refrigeration Capacity
HRF = (R_E+W)/R_E
This formula uses 3 Variables

Variables Used

Heat Rejection Factor - Heat Rejection Factor is the load on the condenser per unit of refrigeration capacity.
Refrigeration Capacity - (Measured in Joule per Second) - Refrigeration capacity is a measure of the effective cooling capacity of a refrigerator.
Compressor work done - (Measured in Joule per Second) - Compressor work done is the work done by the compressor.

STEP 1: Convert Input(s) to Base Unit

Refrigeration Capacity: 1000 Joule per Minute --> 16.6666666666667 Joule per Second (Check conversion here)
Compressor work done: 600 Joule per Minute --> 10 Joule per Second (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

HRF = (R_E+W)/R_E --> (16.6666666666667+10)/16.6666666666667

Evaluating ... ...

HRF = 1.6

STEP 3: Convert Result to Output's Unit

1.6 --> No Conversion Required

FINAL ANSWER

1.6 <-- Heat Rejection Factor

(Calculation completed in 00.020 seconds)

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Home » Physics » Refrigeration and Air Conditioning » Air Conditioning Systems » Mechanical » Heat Transfer » Heat Rejection Factor

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Vishwakarma Institute of Information Technology, Pune (VIIT Pune), Pune

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< 21 Heat Transfer Calculators

Average Coefficient of heat transfer for vapour condensing outside of horizontal tubes of diameter D

Go Average Heat Transfer Coefficient = 0.725*(((Thermal Conductivity^3)*(Density of Liquid Condensate^2)*Acceleration due to Gravity*Latent Heat of Vaporization)/(Number of Tubes*Diameter of Tube*Viscosity of Film*Temperature Difference))^(1/4)

Overall Coefficient of Heat Transfer for Condensation on Vertical Surface

Go Overall Heat Transfer Coefficient = 0.943*(((Thermal Conductivity^3)*(Density of Liquid Condensate-Density)*Acceleration due to Gravity*Latent Heat of Vaporization)/(Viscosity of Film*Height Of Surface*Temperature Difference))^(1/4)

Mean Surface area of Tube when Heat transfer takes place from outside to inside surface of tube

Go Surface Area = (Heat Transfer*Tube Thickness)/(Thermal Conductivity*(Outside Surface Temperature-Inside Surface temperature))

Temperature at Outside Surface of Tube given Heat Transfer

Go Outside Surface Temperature = ((Heat Transfer*Tube Thickness)/(Thermal Conductivity*Surface Area))+Inside Surface temperature

Temperature at Inside Surface of Tube given Heat Transfer

Go Inside Surface temperature = Outside Surface Temperature+((Heat Transfer*Tube Thickness)/(Thermal Conductivity*Surface Area))

Thickness of Tube when Heat transfer takes places from outside to inside surface of tube

Go Tube Thickness = (Thermal Conductivity*Surface Area*(Outside Surface Temperature-Inside Surface temperature))/Heat Transfer

Heat transfer takes place from outside surface to inside surface of tube

Go Heat Transfer = (Thermal Conductivity*Surface Area*(Outside Surface Temperature-Inside Surface temperature))/Tube Thickness

Temperature of Refrigerant Vapour condensing Film given Heat Transfer

Go Vapour condensing film temperature = (Heat Transfer/(Heat Transfer Coefficient*Area))+Outside Surface Temperature

Temperature at Outside Surface of Tube provided Heat Transfer

Go Outside Surface Temperature = Vapour condensing film temperature-(Heat Transfer/(Heat Transfer Coefficient*Area))

Heat Transfer takes place from vapour refrigerant to outside of tube

Go Heat Transfer = Heat Transfer Coefficient*Area*(Vapour condensing film temperature-Outside Surface Temperature)

Overall Temperature difference when Heat transfer takes place from outside to inside surface of tube

Go Overall Temperature Difference = (Heat Transfer*Tube Thickness)/(Thermal Conductivity*Surface Area)

Heat Rejection Factor

Go Heat Rejection Factor = (Refrigeration Capacity+Compressor work done)/Refrigeration Capacity

Heat Transfer in Condenser given Overall Heat Transfer Coefficient

Go Heat Transfer = Overall Heat Transfer Coefficient*Surface Area*Temperature Difference

Overall Temperature difference when Heat Transfer from vapour refrigerant to outside of tube

Go Overall Temperature Difference = Heat Transfer/(Heat Transfer Coefficient*Area)

Overall Temperature difference given Heat Transfer

Go Overall Temperature Difference = Heat Transfer*Thermal Resistance

Overall thermal resistance in condenser

Go Thermal Resistance = Overall Temperature Difference/Heat Transfer

Work done by Compressor given Load on Condenser

Go Compressor work done = Load on Condenser-Refrigeration Capacity

Refrigeration Capacity given Load on Condenser

Go Refrigeration Capacity = Load on Condenser-Compressor work done

Load on Condenser

Go Load on Condenser = Refrigeration Capacity+Compressor work done

Heat Transfer in Condenser given Overall Thermal Resistance

Go Heat Transfer = Temperature Difference/Thermal Resistance

Heat Rejection Factor given COP

Go Heat Rejection Factor = 1+(1/Coefficient of Performance of Refrigerator)

Heat Rejection Factor Formula

Heat Rejection Factor = (Refrigeration Capacity+Compressor work done)/Refrigeration Capacity
HRF = (R_E+W)/R_E

What is Condenser Capacity?

The condenser capacity is the ability of the condenser to transfer heat from the hot vapour refrigerant to the condensing medium.

How to Calculate Heat Rejection Factor?

Heat Rejection Factor calculator uses Heat Rejection Factor = (Refrigeration Capacity+Compressor work done)/Refrigeration Capacity to calculate the Heat Rejection Factor, The Heat Rejection Factor formula is defined as the load on the condenser per unit of refrigeration capacity. Heat Rejection Factor is denoted by HRF symbol.

How to calculate Heat Rejection Factor using this online calculator? To use this online calculator for Heat Rejection Factor, enter Refrigeration Capacity (R_E) & Compressor work done (W) and hit the calculate button. Here is how the Heat Rejection Factor calculation can be explained with given input values -> 1.6 = (16.6666666666667+10)/16.6666666666667.

FAQ

What is Heat Rejection Factor?

The Heat Rejection Factor formula is defined as the load on the condenser per unit of refrigeration capacity and is represented as HRF = (R_E+W)/R_E or Heat Rejection Factor = (Refrigeration Capacity+Compressor work done)/Refrigeration Capacity. Refrigeration capacity is a measure of the effective cooling capacity of a refrigerator & Compressor work done is the work done by the compressor.

How to calculate Heat Rejection Factor?

The Heat Rejection Factor formula is defined as the load on the condenser per unit of refrigeration capacity is calculated using Heat Rejection Factor = (Refrigeration Capacity+Compressor work done)/Refrigeration Capacity. To calculate Heat Rejection Factor, you need Refrigeration Capacity (R_E) & Compressor work done (W). With our tool, you need to enter the respective value for Refrigeration Capacity & Compressor work done and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Heat Rejection Factor?

In this formula, Heat Rejection Factor uses Refrigeration Capacity & Compressor work done. We can use 1 other way(s) to calculate the same, which is/are as follows -

Heat Rejection Factor = 1+(1/Coefficient of Performance of Refrigerator)

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