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Enthalpy at point 2 Formula

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Enthalpy of the Vapour Refrigerant at T2 is the total heat content of the refrigerant vapour at the second point in the vapour compression refrigeration cycle. Check FAQs

h 2 = h f2 + (x 2 \cdot h fg)

h₂ - Enthalpy of The Vapour Refrigerant at T2?h_f2 - Liquid Enthalpy at Point 2?x₂ - Dryness Fraction at Point 2?h_fg - Latent Heat of Fusion?

Enthalpy at point 2 Example

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Here is how the Enthalpy at point 2 equation looks like with Values.

Here is how the Enthalpy at point 2 equation looks like with Units.

Here is how the Enthalpy at point 2 equation looks like.

350 = 150 + (0.2 \cdot 1000)

350kJ/kg = 150kJ/kg + (0.2 \cdot 1000kJ/kg)

350 = 150 + (0.2 \cdot 1000)

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Enthalpy at point 2 Solution

Follow our step by step solution on how to calculate Enthalpy at point 2?

FIRST Step Consider the formula

h 2 = h f2 + (x 2 \cdot h fg)

Next Step Substitute values of Variables

∴

h 2 = 150kJ/kg + (0.2 \cdot 1000kJ/kg)

Next Step Convert Units

∴

h 2 = 150000J/kg + (0.2 \cdot 1E+6J/kg)

Next Step Prepare to Evaluate

∴

h 2 = 150000 + (0.2 \cdot 1E+6)

Next Step Evaluate

∴

h 2 = 350000J/kg

LAST Step Convert to Output's Unit

∴

h 2 = 350kJ/kg

Enthalpy at point 2 Formula Elements

Variables

Enthalpy of The Vapour Refrigerant at T2

Enthalpy of the Vapour Refrigerant at T2 is the total heat content of the refrigerant vapour at the second point in the vapour compression refrigeration cycle.

Symbol: h₂

Measurement: Heat of Combustion (per Mass)Unit: kJ/kg

Note: Value can be positive or negative.

Formulas to find Enthalpy of The Vapour Refrigerant at T2

Liquid Enthalpy at Point 2

Liquid Enthalpy at Point 2 is the total heat content of the refrigerant at the second point in a vapour compression refrigeration cycle.

Symbol: h_f2

Measurement: Heat of Combustion (per Mass)Unit: kJ/kg

Note: Value can be positive or negative.

Formulas to find Liquid Enthalpy at Point 2

Dryness Fraction at Point 2

Dryness Fraction at Point 2 is the measure of the proportion of dry air in the refrigerant at the second point of the vapour compression cycle.

Symbol: x₂

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Dryness Fraction at Point 2

Latent Heat of Fusion

Latent Heat of Fusion is the energy required to change the state of a substance from solid to liquid during the vapour compression refrigeration cycle.

Symbol: h_fg

Measurement: Heat of Combustion (per Mass)Unit: kJ/kg

Note: Value can be positive or negative.

Formulas to find Latent Heat of Fusion

Other formulas in Enthalpy of Vapour Compression Refrigeration Cycle category

Go Work done during isentropic compression(per Kg of refrigerant)

w = h 2 - h 1

Go Refrigerating Effect(for given h1 and h4)

R E = h 1 - h 4

Go Refrigerating Effect given Enthalpy at Inlet of Compressor and Exit of Condenser

R E = h 1 - h f3

Go Coefficient of Performance given enthalpy of liquid refrigerant leaving condenser (hf3)

COP th = \frac{h 1 - h f3}{h 2 - h 1}

How to Evaluate Enthalpy at point 2?

Enthalpy at point 2 evaluator uses Enthalpy of The Vapour Refrigerant at T2 = Liquid Enthalpy at Point 2+(Dryness Fraction at Point 2*Latent Heat of Fusion) to evaluate the Enthalpy of The Vapour Refrigerant at T2, Enthalpy at point 2 formula is defined as the total heat content of air at a specific point, comprising the enthalpy of formation and the product of quality of air and enthalpy of vaporization, providing a comprehensive measure of air's thermal energy at that point. Enthalpy of The Vapour Refrigerant at T2 is denoted by h₂ symbol.

How to evaluate Enthalpy at point 2 using this online evaluator? To use this online evaluator for Enthalpy at point 2, enter Liquid Enthalpy at Point 2 (h_f2), Dryness Fraction at Point 2 (x₂) & Latent Heat of Fusion (h_fg) and hit the calculate button.

FAQs on Enthalpy at point 2

What is the formula to find Enthalpy at point 2?

The formula of Enthalpy at point 2 is expressed as Enthalpy of The Vapour Refrigerant at T2 = Liquid Enthalpy at Point 2+(Dryness Fraction at Point 2*Latent Heat of Fusion). Here is an example- 0.35 = 150000+(0.2*1000000).

How to calculate Enthalpy at point 2?

With Liquid Enthalpy at Point 2 (h_f2), Dryness Fraction at Point 2 (x₂) & Latent Heat of Fusion (h_fg) we can find Enthalpy at point 2 using the formula - Enthalpy of The Vapour Refrigerant at T2 = Liquid Enthalpy at Point 2+(Dryness Fraction at Point 2*Latent Heat of Fusion).

Can the Enthalpy at point 2 be negative?

Yes, the Enthalpy at point 2, measured in Heat of Combustion (per Mass) can be negative.

Which unit is used to measure Enthalpy at point 2?

Enthalpy at point 2 is usually measured using the Kilojoule per Kilogram[kJ/kg] for Heat of Combustion (per Mass). Joule per Kilogram[kJ/kg], Calorie (IT) per Gram[kJ/kg] are the few other units in which Enthalpy at point 2 can be measured.

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Enthalpy at point 2 Formula

Enthalpy at point 2 Example

Enthalpy at point 2 Solution

Enthalpy at point 2 Formula Elements

Other formulas in Enthalpy of Vapour Compression Refrigeration Cycle category

How to Evaluate Enthalpy at point 2?

FAQs on Enthalpy at point 2

Variable Name