Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant

doi:10.12096/j.2096-4528.pgt.19167

Power Generation Technology ›› 2020, Vol. 41 ›› Issue (4): 369-377.DOI: 10.12096/j.2096-4528.pgt.19167

• Power Generation and Environmental Protection • Previous Articles Next Articles

Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant

Yousen ZHANG¹(),Jiang FAN²(),Tao DING¹(),Weixiong CHEN^2,*(),Shuran ZHAO²(),Miaomiao LIU²()

¹ Shenhua Guohua(Beijing) Electric Power Research Institute Co., Ltd., Chaoyang District, Beijing 100025, China
² State Key Laboratory of Multiphase Flow in Power Engineering(Xi'an Jiaotong University), Xi'an 710049, Shaanxi Province, China

Received:2019-11-25 Published:2020-08-31 Online:2020-09-01
Contact: Weixiong CHEN
Supported by:
the National Key Research and Development Program of China(2018YFB0604303)

Abstract

Abstract:

The problem of lack of fresh water resources becomes more and more serious. The coupling of low-temperature multi-effect distillation (LT-MED) seawater desalination technology in thermal power plants is widely used, because it can effectively reduce the cost of water production. Ebsilon software was used to model the power plant and a LT-MED seawater desalination coupling system. The influences of steam ejectors on the thermal economy of the water and power cogeneration system under wide load were analyzed. The results show that the coupled system has the optimal performance for single-stage steam ejector at the 75% THA condition design of the power plant. For a cogeneration system with a two-stage steam ejector, the system's electricity loss for water production (ELWP) is reduced by 13.65% than the system with single-stage steam ejector, when the plant load is at 75% THA. And the two-stage steam's ELWP is also lower than that of the single stage steam ejector system when the plant load is above 50% THA.

Key words: wide load of power plant, steam ejector, low-temperature multi-effect distillation (LT-MED), seawater desalination, thermal economy

CLC Number:

TM621

Yousen ZHANG,Jiang FAN,Tao DING,Weixiong CHEN,Shuran ZHAO,Miaomiao LIU. Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant[J]. Power Generation Technology, 2020, 41(4): 369-377.

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Influence of Steam Ejector on Low-temperature Multi-effect Distillation System Under Wide Load Operation of Power Plant

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