ADDITIONAL
SYSTEMS:
ADVANTAGES
OF
WASTE
HEAT
RECOVERY
Waste Heat Recovery Systems in industrial Air Conditioning and
Refrigeration systems have number of advantages besides the
recovery of heat:
The operating "condenser" duty is reduced when a Heat Reclaim System is
"retrofitted". This reduces the condensing pressure, which in turn reduces the
BKW of the compression equipment, and/or reducing the condenser fan
horsepower. For new installation it is not recommended that the condenser size
be reduced unless the "heat reclaim" requirement coincides with the maximum
plant load conditions.
Where a Desuperheater is installed, the refrigerant gas temperature inlet
to the condensers is reduced, thus reducing the "fouling" tendency of the
condenser & thus reducing water treatment requirement.
Where a Desuperheater is installed, most of the oil that is normally in
Vapour State will condense & a good oil separator can remove it. By removing
the oil before it gets to the evaporators, the system efficiency is increased with
the possibility that the evaporator pressure can be increased.
As a "thumb rule" a 1.8℃ increases in evaporator temperature decreases energy requirements
by approximately 6%. A 3℃ increase will decrease the energy requirement by about 11%.
QUANTIFICATION OF BENEFITS:
Typical 100 TR Freon system has potential to recover 50, 000 to 60, 000 kcal/hr. Depending
on the end use analysis the monitory savings can be as high as Rs. 6, 00, 000/- to Rs. 7, 50,
000/- per annum !!! (Basis: 350 days, 20 hrs/ day, F.O. Fired Boiler) In addition, it results in 3
to 5 % reduction in refrigeration and AC operating cost coupled with prolonged compressor
life.
Benefits/Advantages Of Heat Pipe Heat Exchangers;
Passive Operation
Long Life
Zero cross contamination since streams of source and sink are physically
separated
Minimum Maintenance
Compact Size
Practically zero back pressure
Benefits of ECONET:
A) Reducing Running Cost:
Lower condensing temperature without a water reservoir, hence, the health risks associated
with a still water reservoirs completely eliminated.