Abstract
Deaerators and feedwater heaters are important components of any power utility boiler condensate and feedwater supply system. Deaerators are found in all industrial plants using fired boilers for process steam production. Feedwater heaters of the type described here are usually found only in power generating plants using steam turbines as they rely on steam bled from the turbine as their heat source. While fundamentally different in purpose and design, these two components share the principle of steam condensation as the underlying method of heat transfer. In the deaerator, this is implemented as direct contact spray condensation while the feedwater heater utilises steam condensation on the outer surface of water-bearing tubes.
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Notes
- 1.
The water level in a feedwater heater of either orientation is restricted to very low values for operational reasons of turbine protection which will isolate the bled steam and cascade inlet flows should a high level develop. This is not the case for the spray condenser (Fig. 11.4) which uses the partial covering of tubes by condensate to self-regulate the water level.
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O’Kelly, P. (2013). Deaerators and Feedwater Heaters. In: Computer Simulation of Thermal Plant Operations. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4256-1_16
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