Experimental evaluation of HFC/HFO binary mixtures in a small-scale water-to-water heat pump system

IF 1.7 4区工程技术 Q3 THERMODYNAMICS

Heat Transfer Research Pub Date : 2024-07-01 DOI:10.1615/heattransres.2024054108

Ragıp Yıldırım, Abdullah Yıldız, Azim Doğuş Tuncer

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引用次数: 0

Abstract

In this study, two different hydrochlorofluorocarbon (HFC) / Hydrofluoroolefin (HFO) binary blends (R134a/R1234yf (75/25) and R134a/R1234yf (25/75)) are studied experimentally. Energetic, exergetic and LCCP (life cycle climate performance) evaluations of the heat pump for HFC/HFO binary blends were carried out. In the literature, no studies are available on the use of HFC/HFO in heat pumps or cooling systems at these blend ratios. This study differs from previous studies on HFC/HFO binary mixtures. Therefore, it will contribute to the literature on binary HFC/HFO blends with lower global warming potential (GWP). HFC/HFO binary blends for different temperature of evaporator (-10 °C, -5 °C, 0 °C) and fixed temperature of condenser (35 °C) were studied. The performance of R134a/R1234yf (75/25) refrigerant blend is superior to R134a/R1234yf (25/75) refrigerant blend based on the 1st and 2nd laws of thermodynamics. Although the GWP of R134a/R1234yf (75/25) is higher than that of R134a/R1234yf (25/75), R134a/R1234yf (75/25) has a relatively smaller total LCCP than R134a/R1234yf (25/75). Low GWP is not the only criterion for selecting a refrigerant. Energy and exergy are also important. Because an important part of the overall system emissions of the heat pump is seen to be caused by the consumption of energy.

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小型水-水热泵系统中氢氟碳化合物/氢氟烯烃二元混合物的实验评估

本研究对两种不同的氯氟烃（HFC）/氢氟烯烃（HFO）二元混合物（R134a/R1234yf (75/25) 和 R134a/R1234yf (25/75)）进行了实验研究。对 HFC/HFO 二元混合物热泵进行了能效、效用和 LCCP（生命周期气候性能）评估。在文献中，没有关于在热泵或冷却系统中使用 HFC/HFO 以这些混合比的研究。本研究不同于以往关于 HFC/HFO 二元混合物的研究。因此，它将为有关全球升温潜能值（GWP）较低的 HFC/HFO 二元混合物的文献做出贡献。研究了不同蒸发器温度（-10 °C、-5 °C、0 °C）和固定冷凝器温度（35 °C）下的 HFC/HFO 二元混合物。根据热力学第一和第二定律，R134a/R1234yf（75/25）混合制冷剂的性能优于 R134a/R1234yf（25/75）混合制冷剂。虽然 R134a/R1234yf (75/25) 的全球升温潜能值高于 R134a/R1234yf (25/75)，但 R134a/R1234yf (75/25) 的总 LCCP 相对小于 R134a/R1234yf (25/75)。低全球升温潜能值并不是选择制冷剂的唯一标准。能量和放能也很重要。因为在热泵的整个系统排放中，有很大一部分是由能源消耗引起的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Heat Transfer Research 工程技术-热力学

CiteScore

3.10

自引率

23.50%

发文量

102

审稿时长

13.2 months

期刊介绍： Heat Transfer Research (ISSN1064-2285) presents archived theoretical, applied, and experimental papers selected globally. Selected papers from technical conference proceedings and academic laboratory reports are also published. Papers are selected and reviewed by a group of expert associate editors, guided by a distinguished advisory board, and represent the best of current work in the field. Heat Transfer Research is published under an exclusive license to Begell House, Inc., in full compliance with the International Copyright Convention. Subjects covered in Heat Transfer Research encompass the entire field of heat transfer and relevant areas of fluid dynamics, including conduction, convection and radiation, phase change phenomena including boiling and solidification, heat exchanger design and testing, heat transfer in nuclear reactors, mass transfer, geothermal heat recovery, multi-scale heat transfer, heat and mass transfer in alternative energy systems, and thermophysical properties of materials.