Effect of non-condensable gas on heat transfer in steam turbine condenser and modelling of ejector pump system by controlling the gas extraction rate through extraction tubes
| Autor: | Marjan Golob, Jurij Avsec, Dušan Strušnik |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
Renewable Energy Sustainability and the Environment business.industry 020209 energy Nozzle Boiler (power generation) Energy Engineering and Power Technology Thermal power station Environmental pollution Control engineering Surface condenser 02 engineering and technology Injector law.invention Fuel Technology 020401 chemical engineering Nuclear Energy and Engineering law Steam turbine Heat transfer 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering business Process engineering |
| Zdroj: | Energy Conversion and Management. 126:228-246 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2016.07.082 |
| Popis: | The paper describes the impact of non-condensable gas (NCG) on heat transfer in a steam turbine condenser (STC) and modelling of the steam ejector pump system (SEPS) by controlling the gas extraction rate through extraction tubes. The ideal connection points for the NCG extraction from the STC are identified by analysing the impact of the NCG on the heat transfer and measuring the existing system at a thermal power plant in Slovenia. A simulation model is designed using the Matlab software and Simulink, Neural Net Work, Fuzzy Logic and Curve Fitting Toolboxes, to control gas extraction rate through extraction tubes of the gas pumped from the STC, thus optimising the operation of the steam ejector pump system (SEPS). The gas extraction rate from the STC is controlled in the extraction tubes by pumping only the NCG to the maximum extent. The SEPS is optimised by selecting a Laval nozzle of appropriate size to reduce the steam for the operation of the SEPS, whereby the amount of the extracted NCG is maintained. As the SEPS motive steam is produced in a boiler, the consumption of coal for the production of the SEPS motive steam is reduced as well as the greenhouse gas environmental pollution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect