Experimental study and theoretical analysis of a Roto-Jet pump in small scale organic Rankine cycles
Experimental study and theoretical analysis of a Roto-Jet pump in small scale organic Rankine cycles
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DOI：
10.1016/j.enconman.2015.12.062
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发表时间：
2016-03
影响因子：
10.4
通讯作者：
B. Lei;Jingfu Wang;Yu-ting Wu;Chong-fang Ma;W. Wang;Lei Zhang;Jingya Li
中科院分区：
文献类型：
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作者：
B. Lei;Jingfu Wang;Yu-ting Wu;Chong-fang Ma;W. Wang;Lei Zhang;Jingya Li
有机朗肯循环是将低品位热能转化为动力的最有前途的方法之一。然而，小规模有机朗肯循环的技术并不像大规模系统那样成熟。限制因素之一是循环泵。在目前的工作中，模拟有机朗肯循环条件下创建的循环泵的性能测试，并在不同的转速下的旋转喷射泵的结果。在此基础上，对小型有机朗肯循环系统进行了实验研究。结果表明，该泵的效率在11%~ 23%之间。在所研究的参数范围内，增加泵的转速或降低流量会导致泵效率的普遍降低。该泵适用于蒸发温度在99.5 °C ~ 127 °C之间的小型有机朗肯循环系统，适用于有效热功率在66.2 kW ~ 92.7 kW之间的有机朗肯循环系统。此外，最佳的操作点被发现对应于最高的有机朗肯循环效率为不同的转速的泵。根据最优工况点的计算结果，研究了水泵转速的调节策略和调节效果。
The organic Rankine cycle is one of the most promising methods for converting low grade heat into power. However, the technology of small scale organic Rankine cycle is not as mature as that of large scale system. One of the limiting factors is the circulation pump. In the present work, a simulative organic Rankine cycle condition was created for performance testing of the circulation pump, and the results of a Roto-Jet pump were obtained for different rotational speeds. On this basis, an examination of small scale organic Rankine cycle system has been carried out. The results show that the efficiency of the pump is between 11% and 23%. Increasing the rotational speed of the pump or reducing the flow rate leads to a general decrease of pump efficiency in the parametric ranges under study. It is also found that the pump is suitable for the small scale organic Rankine cycle systems with evaporating temperature between 99.5 °C and 127 °C, and the organic Rankine cycle system is suitable for converting the heat with available thermal power between 66.2 kW and 92.7 kW into power. In addition, the optimal operation points were found to correspond to highest organic Rankine cycle efficiency for different rotational speeds of the pump. Based on the results of optimal operation points, the strategy of adjusting the pump rotation speed and the effects of superheat were investigated.