Abstract
A loop heat pipe (LHP), which is a two-phase heat transfer device, was studied experimentally and theoretically. The steady-state operating characteristics of a LHP when it is operated at adverse (the condenser is below the evaporator) and zero elevations (the evaporator and the condenser are at the same level) had been studied intensively in the past. However, study of a LHP when it is operated at positive elevation (the condenser is above the evaporator) is still lacking. This paper presents detailed theoretical analysis of the steady-state behavior of a LHP operated at positive elevation. The present analysis agrees with experimental results, and is confirmed by flow visualization images. Testing was performed for a wide range of heat loads (20 W-600 W) at three positive elevations: 25.4mm, 76.2mm, and 127mm. Flow visualization images were taken by neutron radiography when the LHP was operated at 102mm positive elevation.
| Original language | English (US) |
|---|---|
| Article number | IMECE2004-60925 |
| Pages (from-to) | 67-74 |
| Number of pages | 8 |
| Journal | American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD |
| Volume | 375 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 1 2004 |
| Event | 2004 ASME International Mechanical Engineering Congress and Exposition, IMECE - Anaheim, CA, United States Duration: Nov 13 2004 → Nov 19 2004 |
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All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Fluid Flow and Transfer Processes
Cite this
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Theoretical and experimental study of a loop heat pipe at positive elevation. / Chuang, Po Ya Abel; Cimbala, John Michael; Brenizer, Jack S.; Conroy, C. Thomas.
In: American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, Vol. 375, No. 2, IMECE2004-60925, 01.01.2004, p. 67-74.Research output: Contribution to journal › Conference article
TY - JOUR
T1 - Theoretical and experimental study of a loop heat pipe at positive elevation
AU - Chuang, Po Ya Abel
AU - Cimbala, John Michael
AU - Brenizer, Jack S.
AU - Conroy, C. Thomas
PY - 2004/1/1
Y1 - 2004/1/1
N2 - A loop heat pipe (LHP), which is a two-phase heat transfer device, was studied experimentally and theoretically. The steady-state operating characteristics of a LHP when it is operated at adverse (the condenser is below the evaporator) and zero elevations (the evaporator and the condenser are at the same level) had been studied intensively in the past. However, study of a LHP when it is operated at positive elevation (the condenser is above the evaporator) is still lacking. This paper presents detailed theoretical analysis of the steady-state behavior of a LHP operated at positive elevation. The present analysis agrees with experimental results, and is confirmed by flow visualization images. Testing was performed for a wide range of heat loads (20 W-600 W) at three positive elevations: 25.4mm, 76.2mm, and 127mm. Flow visualization images were taken by neutron radiography when the LHP was operated at 102mm positive elevation.
AB - A loop heat pipe (LHP), which is a two-phase heat transfer device, was studied experimentally and theoretically. The steady-state operating characteristics of a LHP when it is operated at adverse (the condenser is below the evaporator) and zero elevations (the evaporator and the condenser are at the same level) had been studied intensively in the past. However, study of a LHP when it is operated at positive elevation (the condenser is above the evaporator) is still lacking. This paper presents detailed theoretical analysis of the steady-state behavior of a LHP operated at positive elevation. The present analysis agrees with experimental results, and is confirmed by flow visualization images. Testing was performed for a wide range of heat loads (20 W-600 W) at three positive elevations: 25.4mm, 76.2mm, and 127mm. Flow visualization images were taken by neutron radiography when the LHP was operated at 102mm positive elevation.
UR - http://www.scopus.com/inward/record.url?scp=20344408070&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=20344408070&partnerID=8YFLogxK
U2 - 10.1115/IMECE2004-60925
DO - 10.1115/IMECE2004-60925
M3 - Conference article
AN - SCOPUS:20344408070
VL - 375
SP - 67
EP - 74
JO - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
JF - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
SN - 0272-5673
IS - 2
M1 - IMECE2004-60925
ER -