Page 175 - Boiler plant and distribution system optimization manual

160 Boiler Plant and Distribution System Optimization Manual

6. Repair condensate receivers, pumps and
piping
7. Repair steam leaks
8. Optimize deaereator vent rate
9. Insulate feedwater System
10. Use high pressure condensate to make low
pressure steam
11. Pressure reducing valves
12. Utilize backpressure turbine generation to
augment pressure-reducing valves
13. Have a steam system survey done by a pro-
fessional contractor
14. Install pump traps eliminating electric
pumps
15. Repair heat exchanger drains to permit
condensate return.
16. Implement a pressurized condensate return
system.
17. Separate H.P. and L.P. condensate returns. Figure 10.56—Primary energy losses in steam distri-
18. Isolate un-used sections of steam lines. bution systems
19. Insulate condensate return piping systems
20. Flash steam utilization Description
21. Use hot condensate to keep storage tanks Boilers and steam systems have surface tem-
warm (local use) peratures from 350°F to 450°F and higher and
22. Measure steam loads must have effective insulation to prevent heat
23. Insulate oil storage tanks heated with from escaping from boiler and piping surfaces
steam. (Figure 10.57). Often insulation is removed from
24. Modulate vacuum pressure in vacuum re- valves, piping and boiler parts, for repairs and
turn systems not replaced. This bare surface is a potential safe-
25. Steam compression ty hazard as well as a source of lost energy. One
26. Use steam to drive equipment to reduce danger associated with poor insulation is that
electrical demand. fuel and oil leaks have been known to ignite off

these hot surfaces and start fires.
1. TARGET STEAM SYSTEM LOSSES Advantages/Disadvantages

Asbestos may be encountered in older sys-
Points of attack: tems. Insulating bare steam piping is usually a
quick pay back item.

2. INSULATE ALL HOT BARE
METAL SURFACES 3. STEAM TRAP MAINTENANCE

Cost Cost
Moderate Low

Potential Savings Potential Savings
Good return on investment High