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Ram Efficiency Formula

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Ram Efficiency is the measure of the performance of an air refrigeration system in converting the input energy into useful cooling effect. Check FAQs

η = \frac{p 2' - P i}{P f - P i}

η - Ram Efficiency?p₂' - Stagnation Pressure of System?P_i - Initial Pressure of System?P_f - Final Pressure of System?

Ram Efficiency Example

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Here is how the Ram Efficiency equation looks like with Values.

Here is how the Ram Efficiency equation looks like with Units.

Here is how the Ram Efficiency equation looks like.

0.8667 = \frac{150000 - 85000}{160000 - 85000}

0.8667 = \frac{150000Pa - 85000Pa}{160000Pa - 85000Pa}

0.8667 = \frac{150000 - 85000}{160000 - 85000}

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Ram Efficiency Solution

Follow our step by step solution on how to calculate Ram Efficiency?

FIRST Step Consider the formula

η = \frac{p 2' - P i}{P f - P i}

Next Step Substitute values of Variables

∴

η = \frac{150000Pa - 85000Pa}{160000Pa - 85000Pa}

Next Step Prepare to Evaluate

∴

η = \frac{150000 - 85000}{160000 - 85000}

Next Step Evaluate

∴

η = 0.866666666666667

LAST Step Rounding Answer

∴

η = 0.8667

Ram Efficiency Formula Elements

Variables

Ram Efficiency

Ram Efficiency is the measure of the performance of an air refrigeration system in converting the input energy into useful cooling effect.

Symbol: η

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Ram Efficiency

Stagnation Pressure of System

Stagnation Pressure of System is the total pressure of the air refrigeration system, including the static and dynamic pressure of the air at a given point.

Symbol: p₂'

Measurement: PressureUnit: Pa

Note: Value can be positive or negative.

Formulas to find Stagnation Pressure of System

Initial Pressure of System

Initial Pressure of System is the pressure of the refrigerant at the starting point of the air refrigeration system, which affects the overall performance.

Symbol: P_i

Measurement: PressureUnit: Pa

Note: Value can be positive or negative.

Formulas to find Initial Pressure of System

Final Pressure of System

Final Pressure of System is the ultimate pressure of the air refrigeration system after the refrigeration process is complete.

Symbol: P_f

Measurement: PressureUnit: Pa

Note: Value can be positive or negative.

Formulas to find Final Pressure of System

Other formulas in Air Refrigeration Systems category

Go Energy Performance Ratio of Heat Pump

COP theoretical = \frac{Q delivered}{W per min}

Go Relative Coefficient of Performance

COP relative = \frac{COP actual}{COP theoretical}

Go Theoretical Coefficient of Performance of Refrigerator

COP theoretical = \frac{Q ref}{w}

Go Compression or Expansion Ratio

r p = \frac{P 2}{P 1}

How to Evaluate Ram Efficiency?

Ram Efficiency evaluator uses Ram Efficiency = (Stagnation Pressure of System-Initial Pressure of System)/(Final Pressure of System-Initial Pressure of System) to evaluate the Ram Efficiency, Ram Efficiency formula is defined as the ratio of the difference between the power output of the refrigerant at the evaporator outlet and the power input to the compressor, to the difference between the power input to the compressor and the power input to the compressor at zero load. Ram Efficiency is denoted by η symbol.

How to evaluate Ram Efficiency using this online evaluator? To use this online evaluator for Ram Efficiency, enter Stagnation Pressure of System (p₂'), Initial Pressure of System (P_i) & Final Pressure of System (P_f) and hit the calculate button.

FAQs on Ram Efficiency

What is the formula to find Ram Efficiency?

The formula of Ram Efficiency is expressed as Ram Efficiency = (Stagnation Pressure of System-Initial Pressure of System)/(Final Pressure of System-Initial Pressure of System). Here is an example- 0.866667 = (150000-85000)/(160000-85000).

How to calculate Ram Efficiency?

With Stagnation Pressure of System (p₂'), Initial Pressure of System (P_i) & Final Pressure of System (P_f) we can find Ram Efficiency using the formula - Ram Efficiency = (Stagnation Pressure of System-Initial Pressure of System)/(Final Pressure of System-Initial Pressure of System).

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Ram Efficiency Formula

Ram Efficiency Example

Ram Efficiency Solution

Ram Efficiency Formula Elements

Other formulas in Air Refrigeration Systems category

How to Evaluate Ram Efficiency?

FAQs on Ram Efficiency

Variable Name