Abstract
Nowadays all power plants are using feedwater regenerative heating systems to improve the turbine unit efficiency, and the economic efficiency increases along with the number of regenerative heating system, however at present all fossil power plants apply 7~9 heaters owing to the limitation of turbine structure. The present paper studies how to increase the number of heaters thus to improve the turbine unit efficiency, using stream ejector pump without changing the structure of turbine. Through the calculation of a 660 MW unit, the paper indicate that when applying ejector pump into regenerative heating system the turbine unit efficiency will increase by 0.13%, standard coal consumption rate will decrease by 0.35 g/kWh and each year can save standard coal about 1617.6 ton, which is remarkable in improving the unit thermal economic efficiency.
| Original language | English |
|---|---|
| Pages (from-to) | 521-524 |
| Number of pages | 4 |
| Journal | Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics |
| Volume | 35 |
| Issue number | 3 |
| State | Published - Mar 2014 |
Keywords
- Ejector pump
- Regenerative heating system
- Thermal economic efficiency