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subhranshshekhar
Active Contributor

Join Date: Jan 2009
Posts: 23

Power Plant

06/08/2012 4:42 AM

Why operating vent required to open before taking feed water heater in line in power plant.
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shrikant45
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Join Date: Jun 2012
Posts: 10
#1

Re: Power Plant

06/08/2012 6:35 AM

to remove the accumulated air from the feed water heater line.
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MJCronin
Power-User

Join Date: Oct 2009
Location: Central Midwest
Posts: 262
Good Answers: 10
#2
In reply to #1

Re: Power Plant

06/08/2012 7:46 AM

Shirikant45 is correct....

Feedwater heaters, like many other shell & tube heat exchangers with steam on the shell side, all require venting upon startup.

Venting, of course, wastes a bit of steam, but once air and non-condensibles have been removed the heat exchanger can operate more effectively.

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dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 814
Good Answers: 13
#3

Re: Power Plant

06/13/2012 1:44 PM

Dear Mr. subranshshekar,

The air is highly compressible, and the trapped air will undergo compression, and cause problem. To release the air, venting is to be done.

DHAYANANDHAN.S
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