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Study on off design characteristics of high back pressure unit coupled with ejector
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De WEI1, Xinming XI2, Jian LI2, Zhiping YANG2, Zhihua GE2
Thermal Power Generation | 2023, 52(5) : 107 - 114
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Thermal Power Generation | 2023, 52(5): 107-114
• Thermal energy and science research •
Study on off design characteristics of high back pressure unit coupled with ejector
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De WEI1, Xinming XI2, Jian LI2, Zhiping YANG2, Zhihua GE2
Affiliations
  • 1.GD Power Datong Hudong Generation Co., Ltd., Datong 037043, China
  • 2.National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China
Published: 2023-05-25 doi: 10.19666/j.rlfd.202209218
Outline
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Under the background of auxiliary heat supply of ejector, in order to study the characteristics of ejector under variable working conditions, the calculation methods of ejector at home and abroad are investigated, the ejector calculation model is established and coupled with the high back pressure unit. Moreover, the effects of working steam, ejected steam, ejector back pressure, and ejector opening on the performance of the ejector under variable working conditions are obtained. The results show that, when the working fluid pressure of the ejector changes from 0.25 MPa to 0.45 MPa, the mass flow of the working fluid first increases and then decreases, and the ejector has the best performance at the design working steam pressure. The critical back pressure increases with the steam injection pressure. The pressure of the mixed fluid after injection will not only affect the work of the ejector but also the work of the condenser. Compared with the back pumping unit, the minimum cooling flow of the low pressure cylinder of the high back pressure coupling injector unit can be reduced by 140 t/h and the power supply range can be increased by 43 MW.

ejector  /  off design characteristics  /  ejection ratio  /  cogeneration
De WEI, Xinming XI, Jian LI, Zhiping YANG, Zhihua GE. Study on off design characteristics of high back pressure unit coupled with ejector[J]. Thermal Power Generation, 2023 , 52 (5) : 107 -114 . DOI: 10.19666/j.rlfd.202209218
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  • National Key Research and Development Program(2020YFB0606202)
Appendix
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Year 2023 volume 52 Issue 5
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Article Info
doi: 10.19666/j.rlfd.202209218
  • Receive Date：2022-09-28
  • Online Date：2026-01-23
  • Published：2023-05-25
Article Data
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History
  • Received：2022-09-28
Funding
National Key Research and Development Program(2020YFB0606202)
Affiliations
    1.GD Power Datong Hudong Generation Co., Ltd., Datong 037043, China
    2.National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202209218
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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