Analysis of a novel combined power and ejector-refrigeration cycle

Analysis of a novel combined power and ejector-refrigeration cycle
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新型动力与喷射制冷联合循环的分析

DOI:
10.1016/j.enconman.2015.11.019
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发表时间:
2016-01
影响因子:
10.4
通讯作者:
Yu Zhixing
Yu Zhixing
中科院分区:
工程技术1区
文献类型:
--
作者:
Yang Xingyang;Zheng Nan;Zhao Li;Deng Shuai;Li Hailong;Yu Zhixing

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提出了一种新的利用非共沸混合物的动力-喷射制冷联合循环。在联合循环中,来自有机朗肯循环的涡轮机排气夹带来自喷射器制冷循环的蒸气。非共沸混合物通过汽液分离器分为动力循环和喷射制冷循环。这两种流具有不同的组成。对不同工质组成的循环性能进行了评价,并与常规联合循环进行了比较。结果表明,异丁烷/戊烷混合物(40%/60%)的循环火用最大,为10.29%,异丁烷/戊烷混合物(70%/30%)的循环热效率最大,为10.77%。在异丁烷/戊烷(80%/20%)混合物的情况下,蒸发器中的温度滑移达到最大值15.09 K。参数分析表明,该循环在较低的冷凝器温度下性能较好。虽然制冷循环在较高的发生温度下实现了较低的蒸发温度,但功率输出降低。
A novel combined power and ejector-refrigeration cycle using zeotropic mixture is proposed. In the combined cycle, the turbine exhaust from the organic Rankine cycle entrains the vapor from the ejector-refrigeration cycle. And the zeotropic mixture is divided into the power cycle and the ejector-refrigeration cycle through a vapor–liquid separator. And these two flows have different composition. The cycle performance with different fluid composition is evaluated and it is compared with a conventional combined cycle. It is found that the cycle exergy achieves a maximum value of 10.29% with mixture isobutane/pentane (40%/60%), and the thermal efficiency gets a maximum value of 10.77% with mixture isobutane/pentane (70%/30%). The temperature glide in the evaporator achieves a maximum value of 15.09 K with mixture isobutane/pentane (80%/20%). The parametric analysis shows that the cycle performs better in lower condenser temperature. Though the refrigeration cycle achieves lower evaporating temperature in higher generating temperature, the power output is reduced.
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