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首页> 外文会议>CSAA/IET International Scientific-Technical Conference on Actual Problems of Electronics Instrument Engineering >Performance analysis of organic rankine cycle for low-grade waste heat recovery in industry
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Performance analysis of organic rankine cycle for low-grade waste heat recovery in industry

机译：有机朗肯循环用于工业低品位余热回收的性能分析

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摘要

Low-grade waste heat resource in industry cannot be effectively recovered which is a significant composition of industrial waste heat. Organic Rankine Cycle (ORC) has been turned out to be a desirable solution due to its unique thermodynamic performance. On the basis of the thermodynamic and mathematical models established in the paper, effects of evaporation temperature, pinch point temperature difference in evaporator, degree of superheat, condensation temperature and degree of supercooling under different conditions for various working fluids including isentropic and dry fluids on net power output, thermal efficiency as well as exergy efficiency are investigated. In the process of modeling, mechanical efficiency of turbine and pump are both taken into consideration and irreversibility of the ORC system are expressed in novel form. Results reveal that evaporation temperature and condensation temperature has an obvious impact on system properties, and degree of superheat is not necessary to obtain higher efficiency when isentropic or dry cryogens are chosen.
机译：工业中的低品位余热资源无法得到有效回收，这是工业余热的重要组成部分。由于其独特的热力学性能，有机朗肯循环（ORC）已被证明是理想的解决方案。根据本文建立的热力学和数学模型，对各种工质（包括等熵流体和干流体）在网络上的蒸发温度，蒸发点的夹点温差，过热度，冷凝温度和过冷度的影响研究了功率输出，热效率以及火用效率。在建模过程中，既考虑了涡轮和泵的机械效率，又以新颖的形式表达了ORC系统的不可逆性。结果表明，蒸发温度和冷凝温度对系统性能有明显的影响，当选择等熵或干燥的冷冻剂时，过热度不是获得更高效率所必需的。

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