Steam
boilers for textile:
Textile industry is suffering from energy
crisis specially Gas, Low pressure and high demand among residence in winter
causes complete breakdown. So, it’s high requirement to shift on alternate
energy resources e.g. Coal. Country is very rich with its coal reserves and it
can serve for quite long. In this post we will discuss possible energy
alternates for textile industry, Economical aspect (Costing), Merits and
demerits involved. Major focus is on costing to evaluate efficiency of
different energy resources.
Industry utilizes different kind of boilers
with varying pressure and of different capacities as per unit requirement.
Coal is being burnt down to provide heat Energy for boiler
Case
Study:
Let’s assume a boiler working at pressure
5Bar and producing steam of Two Tons per hour. Efficiency of this boiler is approx.
80%.
What would be cost of producing 2Tons of
steam per hour on Natural Gas, Coal and Furnace Oil?
Our solution to this scenario is a
simple formula which says:
Efficiency(n) = Output Quantityof
Steam(Qs) X Energy in Steam(hf)
Input Qt of Fuel (Qf) X
Gross Cal. Val. (GCV) X Sp. Gravity of fuel
Omitting Specific Gravity of fuels to
simplify and Shifting variables of formula from here to there and vice versa. So,
that Final shape becomes.
Qf = Qs
X hf
GCV X n
So, Here what these are
Qf = Quantity of fuel needed to produce
2Tons steam per hour at 5 Bar
Qs = Qunatity of steam. This is fixed
value 2000Kg per hour
Hf = Enthalpy of evaporation which is Fix
Value taken from Steam table,2757KJ/Kg of Steam.(Means One Kilogram of steam
has this much energy at Pressure 5 Bar)
GCV = Gross caloric value, Different for
each combustible material.
N = Efficiency of Boiler, Fixed quantity
taken as 80%, we will put 0.8 in formula.
