The Heat Transfer Experiment of R245fa

Luo Chao; Gong Yulie; Ma Weibin

doi:10.3969/j.issn.0253-4339.2014.03.021

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The Heat Transfer Experiment of R245fa

更新时间：2024-07-18

- The Heat Transfer Experiment of R245fa
- Journal of Refrigeration Vol. 35, Issue 3, (2014)
- 作者机构：
  
  1. 中国科学院广州能源研究所
  2. 中国科学院可再生能源重点实验室
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2014.03.021
  CLC：
- Published：2014
- 稿件说明：
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Luo Chao, Gong Yulie, Ma Weibin. The Heat Transfer Experiment of R245fa[J]. Journal of Refrigeration, 2014, 35(3).
DOI：

Luo Chao, Gong Yulie, Ma Weibin. The Heat Transfer Experiment of R245fa[J]. Journal of Refrigeration, 2014, 35(3). DOI： 10.3969/j.issn.0253-4339.2014.03.021.

摘要

蒸发器和冷凝器的传热性能是影响制冷机组和双工质发电机组做功效率的关键因素，为了提高中低温余热在热泵机组和地热双工质发电系统中的利用效率，本文选用R245fa循环工质，对满液式蒸发器和冷凝器进行实验研究，分别讨论热水温度进口温度对蒸发器和冷凝器的传热系数、蒸发压力和冷凝压力的影响。研究结果表明，在工质流量和冷却水流量保持不变的条件下，蒸发器传热系数随着热水进口温度和温差的增大而减小，冷凝器的传热系数随着热水进口温度的增加先增大后减小，蒸发器传热系数可以达到2500 W/(m2?℃)；蒸发器压力和汽轮机前后的压差随着热水出口温度的增加而增加，热水流量对蒸发压力和冷凝压力的变化浮动较小。

Abstract

The heat transfer performance of evaporator and condenser is the key factor which has an effect of the power efficiency on the refrigeration and power generation units. An experimental investigation of evaporator and condenser heat transfer with different inlet and outlet hot water temperature was conducted. The cycle working fluid was R245fa. The experiment showed that the evaporator heat transfer coefficient decreased and condenser heat transfer coefficient increased first and then decreased with increasing inlet hot water temperature. The higher heat water temperature

the higher evaporation pressure; Evaporator heat transfer coefficient can reach to 2500 W/(m2?℃).

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Related Institution

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School of Energy Science and Engineering, University of Science and Technology of China

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