Enhancement effects of adding internal heat exchanger on dual-pressure evaporation organic Rankine cycle
Enhancement effects of adding internal heat exchanger on dual-pressure evaporation organic Rankine cycle
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添加内部换热器对双压蒸发有机朗肯循环的强化效果
DOI：
10.1016/j.energy.2022.126329
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发表时间：
2023-02
期刊：
影响因子：
9
通讯作者：
Yuanyuan Duan
中科院分区：
文献类型：
--
作者：
Jian Li;Zhen Yang;Jun Shen;Yuanyuan Duan
双压蒸发有机朗肯循环在中低温热能发电方面具有良好的应用前景。增加内部换热器是提高其性能的一个重要途径。而添加IHE的影响尚未专门分析。需要研究增加IHE的有效性、量化增强效应和合适的情景。本文定量评价了在典型串联双压蒸发ORC（SDORC）中加入IHE的强化效果。分析了热源温度、出口节流、冷热源腐蚀、有机流体种类等因素对强化效果的影响。揭示了在SDORC中增加IHE的合适场景。结果表明，在热源温度足够高的情况下，添加中间换热器可有效提高SDORC的热经济性，单位投资成本可降低3.9%。对于具有出口限制的热源，增加IHE也有效地提高了SDORC的热力学性能，净功率增长为6.1%。对于SDORC，采用IHE更适合于热源温度高、出口温度受限、流体具有腐蚀性、有机流体分子复杂度大的应用场景。增强效果更显著。
Dual-pressure evaporation organic Rankine cycle shows a good outlook in the power generation of medium-to-low temperature heat. Adding internal heat exchanger (IHE) is an important potential way to enhance its performance. While, the impacts of adding IHE have not been analyzed especially. The effectiveness, quantitative enhancement effects, and suitable scenarios of adding IHE need to be studied. This paper quantitatively evaluates the enhancement effects of adding IHE in the typical series dual-pressure evaporation ORC (SDORC). Impacts of heat source temperature, outlet restraint, corrosion of cold source and heat source, and organic fluid type on the enhancement effects are analyzed. The suitable scenarios for adding IHE in SDORC are revealed. Results show that adding IHE can effectively enhance the thermo-economic performance of SDORC at a sufficiently high heat source temperature, and the specific investment cost will be reduced by 3.9%. Adding IHE is also effective in enhancing the thermodynamic performance of SDORC for heat sources with outlet restraint, with a net power growth of 6.1%. For SDORC, adopting IHE fits better in the application scenarios with high heat source temperature, restrained outlet temperature, corrosive fluids, and large molecular complexity of organic fluid. The enhancement effects are more significant.
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