Chemistry, 25.09.2019 00:30 shira35

To produce 1mt /hr of steam in a boiler of capacity 12 kg/cm2 how much hydrogen as a fuel to be burnt in nm3/hr

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Answer from: Ebberman3410

Explanation:

The given data is as follows.

Boiler capacity = $1 MT/hr \times 1000 kg/MT$ = 1000 kg/hr

Steam pressure = 12 $kg/cm^{2}$

For saturated steam, from steam table :

Steam temperature = $187^{o}C$

Specific enthalpy of water = 794.65 kJ/kg

Specific enthalpy of steam = 2783.10 kJ/kg

Therefore, difference between enthalpy of steam and water will be calculated as follows.

= 2783.10 - 794.65

= 1988.45 kJ/kg

So, heat required will be calculated as follows.

Heat required = $\text{boiler capacity} \times \frac{\text{enthalpy difference}}{\text{boiler efficiency}}$

= $1000 kg/hr \times 1988.45 kJ/kg$

= 1988450 kJ/hr

Also, Fuel required = $\frac{\text{heat required}}{\text{calorific value}}$

= $\frac{1988450 kJ/hr}{150000 kJ/kg}$

= 13.25 kg/hr

Hence, Volumetric flow rate of hydrogen require = $\frac{\text{fuel required}}{\text{density}}$

= $\frac{13.25 kg/hr}{0.0899 kg/nm^{3}}$

= 147.45 $nm^{3}/hr$

Thus, we can conclude that 147.45 $nm^{3}/hr$ hydrogen as a fuel will be burnt.

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To produce 1mt /hr of steam in a boiler of capacity 12 kg/cm2 how much hydrogen as a fuel to be burn...

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