Maarky Thermal Systems Presents Paper at ASME 2012 Power Conference
The ASME Power conference was held this week in Anaheim California at the Disneyland Hotel. The conference was held along with the 20th International Conference on Nuclear Engineering (ICONE).
Maarky Thermal System’s paper was titled “Design and Control of Bypass Condensers.” The abstract of the paper is the following:
In waste to energy plants and certain genre of cogeneration plants, it is mandatory to condense the steam from the boiler or HRSG in a separate bypass condenser when the steam turbine is out of service. The steam from the boiler or HRSG is attemperated in a pressure reducing desuperheating valve and then condensed in a bypass condenser. To avoid flashing of condensate in downstream piping it is customary to subcool the condensate in the bypass condenser. Circulating water from the steam surface condenser is used to condense the steam in the bypass condenser.
Some of the challenges involved in the design of the bypass condenser are:
- High shellside design pressure and temperature
- Condensate subcooling
- Large circulating water (tubeside) flow rate
- Relatively low circulating water (tubeside) inlet temperature
- Large Log Mean Temperature Difference (LMTD)
- Large shell diameters
- Small tube lengths
The diverse requirements complicate the mechanical and thermal design of the bypass condenser. This paper highlights the complexities in the design and performance of the bypass condenser. Similarities with the design and operation of steam surface condensers and feedwater heater are reviewed. The uniqueness of the bypass condenser’s design and operation are discussed and appropriate solutions to ensure proper performance are suggested.
Please contact Maarky at sales@maarky.com if you have any questions on the design, operation, or application of a bypass condenser.
