Experimental investigation of a small-scale reversible high-temperature heat pump − organic Rankine cycle system for industrial waste heat recovery

IF 6.1 2区工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2024-08-29 DOI:10.1016/j.applthermaleng.2024.124237

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Abstract

Innovative technologies are required to mitigate the challenges of climate change. A reversible high-temperature heat pump (HTHP) − organic Rankine cycle (ORC) system can be used for effective utilisation of industrial waste heat in the lower temperature band <100 °C. The system can provide useful process heat for industrial processes by operating in HTHP mode or generating power in ORC mode. This paper presents the experimental investigation of the reversible system in both HTHP and ORC modes. A single scroll unit was selected for the compressor (HTHP) and expander (ORC) roles, keeping the system compact. A HCFO refrigerant, R1233zd(E), with a low GWP value, was chosen as the working fluid for both operating modes. When operated in HTHP mode, a maximum compressor overall isentropic efficiency of 73.4 % and a COP_mech of 4.8 (ΔT_lift,rside = 41 K, T_sf,ev,in = 60 °C) was obtained. In ORC mode, the maximum net power output was 512.4 W (T_sf,ev,in = 90 °C, r_p = 2.3), overall cycle efficiency was 3.01 %, and overall isentropic efficiency of the expander was 54.6 %. The technical limitations encountered, and solutions put in place during the experimental testing campaign are discussed in detail.

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用于工业余热回收的小型可逆高温热泵-有机郎肯循环系统的实验研究

减缓气候变化的挑战需要创新技术。可逆式高温热泵（HTHP）-有机郎肯循环（ORC）系统可用于有效利用低温带 <100 °C 的工业废热。该系统可通过 HTHP 模式运行或 ORC 模式发电，为工业过程提供有用的工艺热。本文介绍了 HTHP 和 ORC 两种模式下可逆系统的实验研究。压缩机（HTHP）和膨胀机（ORC）均采用单涡旋机组，以保持系统的紧凑性。在两种运行模式下，都选择了 GWP 值较低的 HCFO 制冷剂 R1233zd(E)作为工作流体。在 HTHP 模式下运行时，压缩机的最大整体等熵效率为 73.4%，COPmech 为 4.8（ΔTlift,rside = 41 K，Tsf,ev,in = 60 °C）。在 ORC 模式下，最大净功率输出为 512.4 W（Tsf,ev,in = 90 °C，rp = 2.3），整体循环效率为 3.01 %，膨胀机的整体等熵效率为 54.6 %。本文详细讨论了在实验测试过程中遇到的技术限制和解决方案。

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.