带回热器和再热器的ORC-VCR组合系统热力学分析

Q3 Environmental Science

Acta Innovations Pub Date : 2022-05-04 DOI:10.32933/actainnovations.44.3

K. Rawat, P. Bhandari, V. S. Bisht

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引用次数: 0

摘要

由于能源需求的增加和常规能源资源的枯竭，低品位热能的利用趋势受到广泛关注。低品位能源可用于ORC-VCR循环制冷。在本工作中，为了提高ORC-VCR循环的性能，在循环中集成了回热器和再热器。以R600a、R600、R290、R1270为工质，在蒸发器温度、冷凝器温度、锅炉出口温度等不同工况下对改造后的系统进行了热力学分析。评估性能的参数包括总COP、每kW制冷量的质量流量、膨胀比和压缩比。通过分析，发现丁烷是改进ORC-VCR循环的最佳选择。结果表明，在锅炉出口温度为90℃、冷凝器温度为40℃的条件下，改进后的ORC-VCR循环的系统COP为0.5542，比带回热器的ORC-VCR循环和简单的ORC-VCR循环分别提高7.1%和18%。

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Thermodynamic analysis of combined ORC-VCR system with recuperator and reheater

The trend of utilization of low-grade thermal energy gain huge attention due to increase in energy demand and depletion of conventional resources of energy. Low grade energy can be used in ORC-VCR cycle for refrigeration purpose. In the present work, to improve the performance a modified ORC-VCR cycle, recuperator and reheater are integrated in the cycle. The thermodynamic analysis of the modified system has been conducted with R600a, R600, R290 and R1270 as working fluids under various operating conditions viz. evaporator temperature, condenser temperature, boiler exit temperature. Different parameters evaluated to assess the performance are overall COP, mass flow rate per kW cooling capacity, expansion ratio and compression ratio. From the analysis, butane is found as a best choice for the modified ORC–VCR cycle. It was found that for the modified ORC-VCR cycle at boiler exit temperature of 90°C and condenser temperature 40°C has system COP of 0.5542 with butane, which is 7.1% and 18% higher than that of ORC-VCR cycle with recuperator and simple ORC-VCR cycle, respectively.

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来源期刊

Acta Innovations Environmental Science-Environmental Engineering

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

16 weeks