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Author:

Xia, Guodong (Xia, Guodong.) (Scholars:夏国栋) | Wang, Wei (Wang, Wei.) (Scholars:王伟) | Jiao, Yonggang (Jiao, Yonggang.) | Ma, Dandan (Ma, Dandan.)

Indexed by:

EI Scopus SCIE

Abstract:

An experimental study was carried out to investigate the thermal characteristics of an eccentric annular wickless heat pipe (EAWHP) with deionized water as a working fluid. The eccentric annular wickless heat pipe was sealed by a high vacuum valve which is capable of changing the filling ratio. The experiments were performed in the range of 343.15-373.15 K operating temperature and 15-60% filling ratio under natural convection and forced convection. The temperature stability, uniformity, and distribution of the evaporator wall outer surface and the condenser wall inner surface of the eccentric annular wickless heat pipe are affected by various factors, such as the filling ratio, the mounting location of the heater controller sensor, and the cooling ability of the condenser section. The results show that the larger filling ratio, lower operating temperature, and the upper temperature control point have been found to be very helpful for optimizing the temperature stability and uniformity in the condenser wall inner surface under our experimental conditions. The temperature stability of the central of condenser wall inner surface can reach 0.048 K for 2 h, while the accuracy of the device for controlling temperature lies within +/- 2.0 K. The condenser wall inner surface temperature uniformity can be reached at 0.142 K, while that of the evaporator wall outer surface is 2.676 K. Analysis of the evaporator wall outer surface temperature distributions using a method of thermal resistance network is also presented. The ability to maintain constant evaporator temperature makes the eccentric annular wickless heat pipes effective devices for use in temperature calibration field.

Keyword:

eccentric annular heat pipe temperature stability filling ratio temperature uniformity thermal resistance

Author Community:

  • [ 1 ] [Xia, Guodong]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Wei]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Ma, Dandan]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Jiao, Yonggang]Shijiazhuang Tiedao Univ, Dept Energy & Environm Engn, Shijiazhuang 050043, Hebei, Peoples R China

Reprint Author's Address:

  • 夏国栋

    [Xia, Guodong]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ, Beijing 100124, Peoples R China

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Source :

HEAT TRANSFER RESEARCH

ISSN: 1064-2285

Year: 2017

Issue: 15

Volume: 48

Page: 1339-1357

1 . 7 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:165

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 3

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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