There are two different media to use for practical heating applications: THERMAL OIL and STEAM/HOT WATER
This table illustrates the differences
|
PROCESS |
HEATING MEDIA |
|
|
THERMAL OIL |
STEAM / HOT WATER |
|
|
Corrosion inside heating pipes |
NO |
YES |
|
Corrosion outside pipes in the Exhaust Heater depending of low incoming temperature |
NO |
YES |
|
Cooling system for condensate |
NO |
YES (Continuously) |
|
Water treatment plant |
NO |
YES (Continuously) |
|
Working temperature |
140 - 350ºC |
140 - 350ºC |
|
Working pressure |
Low pressure 6 - 7 Bar (only circulating pump) |
180ºC - 10 Bar 250ºC - 40 Bar 350ºC - 90 Bar (High pressure system) |
|
Risk for damages during freezing |
NO |
YES (Large risk) |
|
Maintenance cost |
LOW (Very limited) |
LARGER (Large and Continuous) |
|
Condensate cooler |
NO |
YES |
|
Number of Armature |
Less |
More |
|
Leakage Risk |
NO (Welded pipes) |
YES (Flanges and sealings) |
|
Energy saving |
YES (Compared to Steam system) |
NO |