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首页> 外文期刊>Energy Conversion & Management >Operation characteristic of a R123-based organic Rankine cycle depending on working fluid mass flow rates and heat source temperatures
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Operation characteristic of a R123-based organic Rankine cycle depending on working fluid mass flow rates and heat source temperatures

机译：基于R123的有机朗肯循环的工作特性取决于工作流体的质量流量和热源温度

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摘要

The test and operation characteristic of an organic Rankine cycle using R123 and a scroll expander have been investigated. The steady-state operation characteristic is addressed with the varying working fluid mass flow rates ranging of 0.124-0.222 kg/s and heat source temperatures ranging of 383.15-413.15 K. The behaviors and detailed discussion for those four major components (pump, evaporator, expander and condenser) are examined. The experimental results show that the environmental temperature presents a higher influence on the pump behaviors. The range of pump power consumption, isentropic efficiency and back work ratio are 0.21-0.32 kW, 26.76-53.96%, and 14-32%, respectively. The expander isentropic efficiency presents a slight decrease first and then a sharp increase with mass flow rate, while a degree of superheating more than 3 K is necessary to avoid expander cavitation. The expander isentropic and generator efficiencies are in range of 69.10-85.17% and 60-73%, respectively, while the respective heat transfer coefficients for evaporator and condenser are ranging of 200-400 and 450-2000 W/m(2) K. The maximum expander shaft power and electrical power are 2.78 kW and 2.01 kW, respectively, while the maximum system generating efficiency is 3.25%. Moreover, the tested thermal efficiency presents a slight decrease trend with mass flow rate. (C) 2016 Elsevier Ltd. All rights reserved.
机译：研究了使用R123和涡旋膨胀机进行有机朗肯循环的测试和操作特性。通过变化的工作流体质量流量范围为0.124-0.222 kg / s和热源温度范围为383.15-413.15 K来解决稳态工作特性。这四个主要组件（泵，蒸发器，检查膨胀机和冷凝器）。实验结果表明，环境温度对泵的性能影响较大。泵的功率消耗范围，等熵效率和后功比分别为0.21-0.32 kW，26.76-53.96％和14-32％。膨胀机的等熵效率首先随质量流量而略有下降，然后急剧增加，而为了避免膨胀机气蚀，过热度必须大于3K。膨胀机的等熵和发电机效率分别在69.10-85.17％和60-73％的范围内，而蒸发器和冷凝器的各自传热系数分别为200-400和450-2000 W / m（2）K。膨胀机的最大轴功率和电功率分别为2.78 kW和2.01 kW，而最大系统发电效率为3.25％。而且，测试的热效率随质量流量呈现出轻微的下降趋势。 （C）2016 Elsevier Ltd.保留所有权利。

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