Page 180 - Boiler plant and distribution system optimization manual
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Over 100 Ways to Improve Efficiency 165
17. SEPARATE H.P. AND
L.P. CONDENSATE RETURNS
There are certain economies in separating
high pressure and low pressure recovery systems.
It will provide a source of two levels of tempera-
ture and pressure available for specific applica-
tions.
18. ISOLATE UN-USED SECTIONS
OF STEAM LINES.
Steam piping loses the same amount of heat
whether it is transporting steam or not so if a sec-
tion of piping is not in use, valve it off or perma-
nently blank it off.
Figure 10.60—Pumping steam trap does not need
electrical support and are quite trouble free.
19. INSULATE CONDENSATE RETURN
PIPING SYSTEMS
backs which uses the local steam supply to do
the pumping without the hazards of an electrical Some insulation programs do not consider
supply with confidence that the valuable conden- it cost effective to insulate condensate recovery
sate will be returned to the boiler plant. piping because of its low temperature and low
heat loss. They do not take into consideration the
Advantages/Disadvantages face that for every 11F the condensate loses get-
Requires investment but delivers reliability ting back to the plant costs 1% in overall system
and large savings. efficiency. For example if the condensate tem-
perature drops from 190F to 120F a difference of
70F this represents a 6.3% loss in efficiency; total
15. REPAIR HEAT ExCHANGER DRAINS boiler plant fuel use. So if a plant is burning $2
TO PERMIT CONDENSATE RETURN million worth of fuel a year, this represents about
$126,000 a year.
Sometimes things are just not piped up prop-
erly and steam condensate is lost to the environ-
ment. 20. FLASH STEAM UTILIzATION
Cost
16. IMPLEMENT A PRESSURIzED Moderate
CONDENSATE RETURN SYSTEM
Potential Savings
A pressurized condensate return system gets Moderate
steam and condensate back to the plant where
both can be utilized instead of causing steam and Description
water damage in an office building, school or lab- Use a flash steam recovery vessel to collect
oratory. condensate from high pressure sources. It sepa-
