# How to Calculate Heat loss due to evaporation of water formed due to H_{2} in fuel?

Calculation of percentage heat loss due to evaportation of water formed due to H_{2} in fuel.

## Amount of Heat Loss Calculation due to Evaporation

The percentage loss of heat loss due to evaporation due to evaporation of water formed due to H_{2 }fuel is defined as the loss caused due to the combustion of hydrogen with water. The water on combustion is converter into steam and evaporates. Below given the formula to calculate the % loss of heat loss due to evaporation.

**Formula: **

**L**_{2 }= ({9 x H_{2} x [584 + C_{p} (T_{f} - T_{a})]} / GCV of Fuel ) x 100

**Where,**

H_{2} = Hydrogen present in fuel on 1kg basis

C_{p} = Specific heat of superheated steam in kCal/kg^{o}C

T_{f} = Fuel gas temperature in ^{o}C

T_{a} = Ambient temperature in ^{o}C

Let us consider an example, on how to calculate heat loss due to evaporation of water formed due to H2 in fuel.

**Step 1:**Given that,

Hydrogen present in fuel on 1kg basis = 0.15

Specific heat of superheated steam = 0.40 kCal/kg^{o}C

Fuel gas temperature = 200^{o}C

Ambient temperature = 30 ^{o}C

GCV of fuel = 13000

**Step 2:**Applying the values in the formula,

L_{2 }= ({9 x 0.15_{} x [584 + C_{p} (T_{f} - T_{a})]} / GCV of Fuel ) x 100

L_{2 }= ({9 x 0.15_{} x [584 + 0.40 (200 - 30_{})]} / 13000 ) x 100

L_{2 }= 6.77%

**Result:** % Heat Loss Due to Evaporation = 6.77%

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