FAIZANYOUSUF
Mechanical
- Jan 23, 2016
- 47
Dear Experts,
I would like to ask you to correct my calculation and my interpretation if I am wrong. The question basically pertains to the increase in steam generation via increase in feed water temperature.
Currently, the feed water temperature is 85 C. I am thinking to increase it up to 95 C so that steam generation could be increased. The boiler is Waste Heat Recovery Boiler extracting energy from engine exhaust. The feed tank capacity is 2.7 MT. Calculation is as follows,
Energy saved there by increase feed water temperature by 10 C.
Q = 10 * 2700 * 4.186
Q = 113022 KJ
Now the steam pressure normally is 6.5 BAR. At this pressure, the specific ethalpy of steam is 2758.87 KJ/KG. Considering this, I would generate more steam of,
113022 / 2758.87 = 40 KG (approx.)
Which is very less as compare to my expectation. Please suggest am I correct?
Thanks.
I would like to ask you to correct my calculation and my interpretation if I am wrong. The question basically pertains to the increase in steam generation via increase in feed water temperature.
Currently, the feed water temperature is 85 C. I am thinking to increase it up to 95 C so that steam generation could be increased. The boiler is Waste Heat Recovery Boiler extracting energy from engine exhaust. The feed tank capacity is 2.7 MT. Calculation is as follows,
Energy saved there by increase feed water temperature by 10 C.
Q = 10 * 2700 * 4.186
Q = 113022 KJ
Now the steam pressure normally is 6.5 BAR. At this pressure, the specific ethalpy of steam is 2758.87 KJ/KG. Considering this, I would generate more steam of,
113022 / 2758.87 = 40 KG (approx.)
Which is very less as compare to my expectation. Please suggest am I correct?
Thanks.
