海洋温差能氨水工质引射器对热力循环性能影响的理论研究
Theoretical Study on the Impact of Ocean Thermal Energy Conversion Ammonia Hydroxide Ejector on Thermal Cycle Performance
投稿时间:2020-01-16  修订日期:2020-02-28
DOI:
中文关键词:  海洋温差能  引射器  工质浓度  透平进口压力  热力循环效率  净输出功
英文关键词:Ocean thermal energy conversion(OTEC)  Ejector  Working medium mass fraction  Turbine inlet pressure  Thermal cycle efficiency  Net output
基金项目:国家自然科学基金项目“海洋温差发电混合工质热力循环二次热回收影响机理研究与试验验证”(51709055)
作者单位E-mail
王洪雨 山东大学海洋研究院 wanghysdu@163.com 
刘伟民 自然资源部第一海洋研究所  
刘延俊 山东大学海洋研究院 lyj111ky@163.com 
陈云 山东大学海洋研究院  
彭景平 自然资源部第一海洋研究所  
翟晓宇 山东大学海洋研究院  
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中文摘要:
      本文研究使用引射器来提高海洋温差能热力循环效率,热力循环采用氨-水混合工质。通过对使用引射器与没使用引射器的热力循环进行数值模拟和对比分析,探究不同工质浓度、透平进口压力和温、冷海水温度对循环净输出功和热力循环效率的影响。结果表明,使用引射器后循环净输出功和热力循环效率都得到了提高。随着氨工质浓度的增加,循环净输出功不断增加,热力循环效率先增大后减小,在工质浓度为0.77的工况下,热力循环效率的最大值可以达到4.30%;随着透平进口压力的变化,循环净输出功和热力循环效率均先增大后减小,在透平进口压力为730kPa的工况下,热力循环效率的最大值可以达到4.24%;循环净输出功和热力循环效率随温海水温度的升高而升高,随冷海水温度的升高而减小。
英文摘要:
      Ejectors are used to improve the efficiency of thermal cycle of Ocean thermal energy conversion in this paper,ammonia-water mixture is used as working medium. The effects of different working medium mass fraction, turbine inlet pressure, and warm and cold seawater temperature on the net output and the thermal cycle efficiency were investigated in the thermal cycle with and without the ejector by numerical simulation and comparative analysis. It is found that the net output and the thermal cycle efficiency are improved by using the ejector. The net output increases continuously and the thermal cycle efficiency increases first and then decreases with the increase of ammonia working medium mass fraction, the maximum thermal cycle efficiency can reach 4.30% under the working medium mass fraction of 0.77; the net output and the cycle thermal efficiency both increase first and then decrease with the increase of the inlet pressure of the turbine, the maximum thermal cycle efficiency can reach 4.24% under the turbine inlet pressure of 730kPa; The net output and the thermal cycle efficiency increase with the increase of warm seawater temperature and decrease with the increase of cold seawater temperature.
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