Shen, Chao;
Zhang, Bowen;
Zhang, Dongwei;
Zhang, Yizhe;
Wei, Shen;
Yang, Shaolun;
(2023)
Experimental study on the parallel-flow heat pipe heat exchanger for energy saving in air conditioning.
Journal of Building Engineering
, 75
, Article 106842. 10.1016/j.jobe.2023.106842.
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Abstract
Energy saving significantly and positively affects energy conservation and releases less carbon dioxide. This study aims to investigate the energy-saving characteristics of a novel parallel-flow heat pipe heat exchanger (PFHP-HE) in air conditioning. It merged the characteristics of high axial heat transfer performance of heat pipe with high external heat transfer performance of parallel-flow heat exchanger (PF-HE). The test rig for the PFHP-HE was built on the basis of the heat transfer wind tunnel in this work. The heat transfer performance of parallel-flow heat pipe heat exchanger charged with R600A as the working fluid was experimentally studied. The filling rate of the heat pipe was 26%, and its thermal behavior was analyzed. The evaporation section of the PFHP-HE was heated by heating belt. The experiment was conducted with heating power of 500W. The experiments were performed with cooling air flow rates ranging from 63.36 m3/h to 118.08 m3/h. The results indicate that when the airflow rate was 118.08m3/h, the minimum thermal resistance of the PFHP-HE was 0.06 K/W, and the heat transfer efficiency was up to 98% in the experiments. As the pulsation phenomenon was caused by its small diameter, the temperature distribution in condenser had stratified phenomenon in PFHP-HE. The PFHP-HE has excellent heat transfer performance and working stability. The PFHP-HE is a promising heat exchanger for energy-saving in air conditioning. Its superior heat transfer performance and working stability make it an attractive alternative to conventional heat pipe heat exchangers.
| Type: | Article |
|---|---|
| Title: | Experimental study on the parallel-flow heat pipe heat exchanger for energy saving in air conditioning |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jobe.2023.106842 |
| Publisher version: | http://doi.org/10.1016/j.jobe.2023.106842 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Heat pipes, Parallel-flow heat exchangers, Waste heat recovery, Energy saving, Air conditioning |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10170629 |
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