摘要
在海洋温差能发电系统中,氨工质的做功能力较强,缺点是湿工质,且有毒、易燃,安全性较差。文章根据热力学性质互补原则,以R227ea/ammonia混合物作为研究对象,对其应用于海洋温差能朗肯循环的性能进行理论研究。研究结果表明:非公沸混合工质在相变时存在温度滑移,这有利于减少换热不可逆损失;随着混合工质中R227ea质量分数的增加,混合工质的毒性和可燃性降低;当R227ea的质量分数为0.15时,混合工质的热效率达到最大值,为3.1%。
In the ocean thermal energy conversion systems, the work capacity of ammonia is strong,but it is wet working fluid, with the undesired properties of being toxic, flammable and poor security.Based on the principle of complementarity of the thermodynamic properties, R227ea/ammonia were investigated as the mixing working fluids of OTEC Rankine cycle. The results showed that the obvious temperature glide during phase change for zeotropic mixtures which helped to reduce the irreversible loss of heat transfer, with the mass fraction of R227 ea increasing, the toxicity and flammability of R227ea/ammonia would decrease, when the mass fraction of R227 ea was 0.15, the thermal efficiency of the mixing working fluid reached the maximum 3.1%.
出处
《可再生能源》
CAS
北大核心
2015年第4期632-636,共5页
Renewable Energy Resources
基金
国家自然科学基金(51276185)
