Retrotec USACE - Manual (Page 187)

Appendix D D57
D.4.1.24 Vent Gases Released Outdoors Warmer Than 93.3 °C
(200 °F) (Waste)
Figure D99. Deaerator tank (left) and
condensate receiver (above)—both could
have vent gases above 200 °F.
In a steam heating system that has vents from condensate receivers and de-
aerator tanks, steam being condensed has a temperature of 100 °C (212 °F)
(Figure D99). These vessels are vented to the atmosphere to avoid surges in
back pressure on the pumps that send the collected water to the component in
the system. The vented gases are thus often warmer than 93.3 °C (200 °F) and
might be suitable for the recovery of some heat.
D.4.1.25 Use of Small Ineffi cient Steam Turbines (Less Than 65%)
(Ineffi ciency)
Figure D100. Pump in foreground is
electrically driven. The pump behind it is a
turbine-driven pump.
Many older large steam heating plants have steam turbines connected to
boiler-related equipment such as boiler feed water pumps and induced and
forced draft fans (Figure D100). The turbines were installed so that the