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Entropy at point 1 Formula

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Entropy at Point 1 is a thermodynamic property that measures the disorder or randomness of a system at a specific point in the vapour compression refrigeration cycle. Check FAQs

s 1 = s f1 + (\frac{x 1 \cdot h fg}{T 1})

s₁ - Entropy at Point 1?s_f1 - Liquid Entropy at Point 1?x₁ - Dryness Fraction at Point 1?h_fg - Latent Heat of Fusion?T₁ - Temperature at The Suction of Compressor?

Entropy at point 1 Example

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Here is how the Entropy at point 1 equation looks like with Values.

Here is how the Entropy at point 1 equation looks like with Units.

Here is how the Entropy at point 1 equation looks like.

3.64 = 3 + (\frac{0.16 \cdot 1000}{250})

3.64kJ/kg*K = 3kJ/kg*K + (\frac{0.16 \cdot 1000kJ/kg}{250K})

3.64 = 3 + (\frac{0.16 \cdot 1000}{250})

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Entropy at point 1 Solution

Follow our step by step solution on how to calculate Entropy at point 1?

FIRST Step Consider the formula

s 1 = s f1 + (\frac{x 1 \cdot h fg}{T 1})

Next Step Substitute values of Variables

∴

s 1 = 3kJ/kg*K + (\frac{0.16 \cdot 1000kJ/kg}{250K})

Next Step Convert Units

∴

s 1 = 3000J/kg*K + (\frac{0.16 \cdot 1E+6J/kg}{250K})

Next Step Prepare to Evaluate

∴

s 1 = 3000 + (\frac{0.16 \cdot 1E+6}{250})

Next Step Evaluate

∴

s 1 = 3640J/kg*K

LAST Step Convert to Output's Unit

∴

s 1 = 3.64kJ/kg*K

Entropy at point 1 Formula Elements

Variables

Entropy at Point 1

Entropy at Point 1 is a thermodynamic property that measures the disorder or randomness of a system at a specific point in the vapour compression refrigeration cycle.

Symbol: s₁

Measurement: Specific EntropyUnit: kJ/kg*K

Note: Value can be positive or negative.

Formulas to find Entropy at Point 1

Liquid Entropy at Point 1

Liquid Entropy at Point 1 is the entropy of the liquid refrigerant at the first point in the vapour compression refrigeration cycle.

Symbol: s_f1

Measurement: Specific EntropyUnit: kJ/kg*K

Note: Value can be positive or negative.

Formulas to find Liquid Entropy at Point 1

Dryness Fraction at Point 1

Dryness Fraction at Point 1 is the measure of the amount of dry air in the refrigerant at the first point of the vapour compression refrigeration cycle.

Symbol: x₁

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Dryness Fraction at Point 1

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

Temperature at The Suction of Compressor

Temperature at the suction of compressor is the temperature of the refrigerant at the suction side of the compressor in a vapour compression refrigeration cycle.

Symbol: T₁

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Temperature at The Suction of Compressor

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 Entropy at point 1?

Entropy at point 1 evaluator uses Entropy at Point 1 = Liquid Entropy at Point 1+((Dryness Fraction at Point 1*Latent Heat of Fusion)/Temperature at The Suction of Compressor) to evaluate the Entropy at Point 1, Entropy at point 1 formula is defined as a measure of the disorder or randomness of a system at a specific point, typically represented by the symbol "s" and is used to quantify the amount of thermal energy unavailable to do work in a thermodynamic system. Entropy at Point 1 is denoted by s₁ symbol.

How to evaluate Entropy at point 1 using this online evaluator? To use this online evaluator for Entropy at point 1, enter Liquid Entropy at Point 1 (s_f1), Dryness Fraction at Point 1 (x₁), Latent Heat of Fusion (h_fg) & Temperature at The Suction of Compressor (T₁) and hit the calculate button.

FAQs on Entropy at point 1

What is the formula to find Entropy at point 1?

The formula of Entropy at point 1 is expressed as Entropy at Point 1 = Liquid Entropy at Point 1+((Dryness Fraction at Point 1*Latent Heat of Fusion)/Temperature at The Suction of Compressor). Here is an example- 0.00364 = 3000+((0.16*1000000)/250).

How to calculate Entropy at point 1?

With Liquid Entropy at Point 1 (s_f1), Dryness Fraction at Point 1 (x₁), Latent Heat of Fusion (h_fg) & Temperature at The Suction of Compressor (T₁) we can find Entropy at point 1 using the formula - Entropy at Point 1 = Liquid Entropy at Point 1+((Dryness Fraction at Point 1*Latent Heat of Fusion)/Temperature at The Suction of Compressor).

Can the Entropy at point 1 be negative?

Yes, the Entropy at point 1, measured in Specific Entropy can be negative.

Which unit is used to measure Entropy at point 1?

Entropy at point 1 is usually measured using the Kilojoule per Kilogram K[kJ/kg*K] for Specific Entropy. Joule per Kilogram K[kJ/kg*K], Calorie per Gram per Celcius[kJ/kg*K], Joule per Kilogram per Celcius[kJ/kg*K] are the few other units in which Entropy at point 1 can be measured.

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Entropy at point 1 Formula

Entropy at point 1 Example

Entropy at point 1 Solution

Entropy at point 1 Formula Elements

Other formulas in Enthalpy of Vapour Compression Refrigeration Cycle category

How to Evaluate Entropy at point 1?

FAQs on Entropy at point 1

Variable Name