Steam Heating with Heat Exchangers
Shell and tube heat exchangers are frequently used to heat liquids
where steam is available from central boilers or waste heat from
processes. Electric steam boilers can be used as a supplemental or
alternate steam source.
Shell and tube heat exchangers are frequently used to heat liquids
where steam is available from central boilers or waste heat from
processes. Electric steam boilers can be used as a supplemental or
alternate steam source.
Example A chemical company uses a shell and tube heatexchanger to heat 10 gpm
of water from 140??F to 185??F for a continuous process. The
exchanger is supplied with 50 psig steam from a large central boiler.
The company wishes to shut down the large boiler in the summer months.
What size boiler is needed to replace the central steam supply during
shut down? Condensate is returned to the boiler mixed with 50??F
feed water.
of water from 140??F to 185??F for a continuous process. The
exchanger is supplied with 50 psig steam from a large central boiler.
The company wishes to shut down the large boiler in the summer months.
What size boiler is needed to replace the central steam supply during
shut down? Condensate is returned to the boiler mixed with 50??F
feed water.
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Q= (500 lb/hr) (Cp) ~SG) (F) (A~ (C)
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x 1.2 SF
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H
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Where:
