Performance characteristics of variable conductance loop thermosyphon for energy-efficient building thermal control

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

View graph of relations

Author(s)

  • Jingyu Cao
  • Xiaoqiang Hong
  • Zhanying Zheng
  • Mingke Hu
  • Qiliang Wang
  • Gang Pei

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number115337
Number of pages12
Journal / PublicationApplied Energy
Volume275
Online published23 Jun 2020
Publication statusOnline published - 23 Jun 2020

Abstract

Variable conductance loop thermosyphon (VCLT) manipulates natural phase-change cycle to regulate the heat transfer. Its primary advantages include high sustainability, simple design and low cost. One of the potential applications of variable conductance loop thermosyphon is thermal control in buildings for achieving high energy efficiency. In this study, a distributed steady-state model was implemented to determine the heat transfer control characteristics of variable conductance loop thermosyphon for the first time and evaluate its effectiveness on precise air-conditioning for buildings. The internal flow resistance rises from 0.002 K/W to 0.305 K/W and the heat transfer rate decreases from 468.5 W to 71.9 W when the relative opening degree of the regulating valve reduces from 1.00 to 0.17 under normal boundary conditions. The thermodynamic analyses show that the regulating valve of the variable conductance loop thermosyphon can enable effective thermal control over a wide range of heat transfer rate to accomplish indoor thermal comfort. The study also reveals that variable conductance loop thermosyphon can be effectively adopted with various working fluids and over wide ranges of heat source and heat sink temperatures.

Research Area(s)

  • Air-conditioning, Energy-efficient building, Loop thermosyphon, Numerical study

Citation Format(s)

Performance characteristics of variable conductance loop thermosyphon for energy-efficient building thermal control. / Cao, Jingyu; Hong, Xiaoqiang; Zheng, Zhanying; Asim, Muhammad; Hu, Mingke; Wang, Qiliang; Pei, Gang; Leung, Michael K.H.

In: Applied Energy, Vol. 275, 115337, 01.10.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal