Advanced loop heat pipe application for cooling high power LED lights
The ever-increasing power density of electronic devices fosters development of cooling systems. Among them, two-phase heat transfer devices in general and Loop Heat Pipes (LHP) in particular offer advantages by being completely passive while being able to cope with high heat fluxes. However, LHP man...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-05-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24003514 |
| _version_ | 1797202131443253248 |
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| author | Igors Ušakovs Luka Ivanovskis |
| author_facet | Igors Ušakovs Luka Ivanovskis |
| author_sort | Igors Ušakovs |
| collection | DOAJ |
| description | The ever-increasing power density of electronic devices fosters development of cooling systems. Among them, two-phase heat transfer devices in general and Loop Heat Pipes (LHP) in particular offer advantages by being completely passive while being able to cope with high heat fluxes. However, LHP manufacturing and especially integration is complicated by the loop architecture, which is not found in conventional Heat Pipes (HP). In an attempt to fit LHP layout into HP-like housing, a novel Heat Loop Pipe (HLP) device was designed, manufactured and tested in application to cooling a portable high-power (80 W) LED luminaire with a focusing reflector. The HLP utilizes co-axial layout of vapor and liquid lines and an additional wick in the condenser. The butane-charged, 350 mm-long HLP showed unexpectedly high resistance in the adverse orientation (evaporator above the condenser), which was an order of magnitude higher than in reflux orientation (0.8 K/W vs. 0.03 K/W). A possible explanation of this behavior in terms of vapor superheating in the evaporator channels is given. Analysis of the test results with help of p-T diagram justifies this assumption. Finding the root cause for such behavior requires further study. |
| first_indexed | 2024-04-24T07:58:34Z |
| format | Article |
| id | doaj.art-b4393cb9d1b2492bba910e6f8b2ea738 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-04-24T07:58:34Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-b4393cb9d1b2492bba910e6f8b2ea7382024-04-18T04:20:34ZengElsevierCase Studies in Thermal Engineering2214-157X2024-05-0157104320Advanced loop heat pipe application for cooling high power LED lightsIgors Ušakovs0Luka Ivanovskis1Corresponding author.; Allatherm SIA, 3 Pulka Str., LV-1007, Riga, LatviaAllatherm SIA, 3 Pulka Str., LV-1007, Riga, LatviaThe ever-increasing power density of electronic devices fosters development of cooling systems. Among them, two-phase heat transfer devices in general and Loop Heat Pipes (LHP) in particular offer advantages by being completely passive while being able to cope with high heat fluxes. However, LHP manufacturing and especially integration is complicated by the loop architecture, which is not found in conventional Heat Pipes (HP). In an attempt to fit LHP layout into HP-like housing, a novel Heat Loop Pipe (HLP) device was designed, manufactured and tested in application to cooling a portable high-power (80 W) LED luminaire with a focusing reflector. The HLP utilizes co-axial layout of vapor and liquid lines and an additional wick in the condenser. The butane-charged, 350 mm-long HLP showed unexpectedly high resistance in the adverse orientation (evaporator above the condenser), which was an order of magnitude higher than in reflux orientation (0.8 K/W vs. 0.03 K/W). A possible explanation of this behavior in terms of vapor superheating in the evaporator channels is given. Analysis of the test results with help of p-T diagram justifies this assumption. Finding the root cause for such behavior requires further study.http://www.sciencedirect.com/science/article/pii/S2214157X24003514Two-phase heat transferLED thermal managementHeat loopHeat loop pipeLoop heat pipe |
| spellingShingle | Igors Ušakovs Luka Ivanovskis Advanced loop heat pipe application for cooling high power LED lights Case Studies in Thermal Engineering Two-phase heat transfer LED thermal management Heat loop Heat loop pipe Loop heat pipe |
| title | Advanced loop heat pipe application for cooling high power LED lights |
| title_full | Advanced loop heat pipe application for cooling high power LED lights |
| title_fullStr | Advanced loop heat pipe application for cooling high power LED lights |
| title_full_unstemmed | Advanced loop heat pipe application for cooling high power LED lights |
| title_short | Advanced loop heat pipe application for cooling high power LED lights |
| title_sort | advanced loop heat pipe application for cooling high power led lights |
| topic | Two-phase heat transfer LED thermal management Heat loop Heat loop pipe Loop heat pipe |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24003514 |
| work_keys_str_mv | AT igorsusakovs advancedloopheatpipeapplicationforcoolinghighpowerledlights AT lukaivanovskis advancedloopheatpipeapplicationforcoolinghighpowerledlights |