A performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick pores
In this paper, we propose a practical simulation method for designing Loop Heat Pipe (LHP) which is applied to cooling system for electronic devices. To realize rapid evaluation of cooling performance of LHP, the proposed performance estimation method calculates maximum heat transfer of LHP using 1D...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2014-10-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/80/818/80_2014trans0288/_pdf/-char/en |
| _version_ | 1798019114257612800 |
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| author | Izumi NITTA Sachio KOBAYASHI Hiroki KOBAYASHI Masayoshi HASHIMA Yuichi SATO Susumu OGATA Takahiro KIMURA |
| author_facet | Izumi NITTA Sachio KOBAYASHI Hiroki KOBAYASHI Masayoshi HASHIMA Yuichi SATO Susumu OGATA Takahiro KIMURA |
| author_sort | Izumi NITTA |
| collection | DOAJ |
| description | In this paper, we propose a practical simulation method for designing Loop Heat Pipe (LHP) which is applied to cooling system for electronic devices. To realize rapid evaluation of cooling performance of LHP, the proposed performance estimation method calculates maximum heat transfer of LHP using 1D thermal-fluid network analysis. However, it is difficult to simulate phase-change of working fluid in LHP accurately with 1D model, since each component of LHP is modeled into a simple 1D network and its detailed shape is not considered enough. Especially, evaporator wick is indispensable component of LHP for determining its maximum heat transfer, and it is required to predict wick dry-out, where working fluid is dried in many pores of wick and LHP does not work as a result. The proposed simulation method introduces a wick pore inactivation model which depends on both input heat and wick pore diameter distribution to consider wick dry-out. The inactivation model applied to calculating wick permeability which determines pressure loss of wick. By fitting the wick permeability model to measured temperature distribution and maximum heat transfer of a LHP prototype for server systems, we show that our model estimates maximum heat transfer within allowable error compared to the experimental value. |
| first_indexed | 2024-04-11T16:35:24Z |
| format | Article |
| id | doaj.art-f81e70678eb84c639fa6f8e2e5423231 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T16:35:24Z |
| publishDate | 2014-10-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-f81e70678eb84c639fa6f8e2e54232312022-12-22T04:13:52ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612014-10-0180818TRANS0288TRANS028810.1299/transjsme.2014trans0288transjsmeA performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick poresIzumi NITTA0Sachio KOBAYASHI1Hiroki KOBAYASHI2Masayoshi HASHIMA3Yuichi SATO4Susumu OGATA5Takahiro KIMURA6FUJITSU LABORATORIES LTD.FUJITSU LABORATORIES LTD.FUJITSU LABORATORIES LTD.FUJITSU LABORATORIES LTD.FUJITSU LABORATORIES LTD.FUJITSU LABORATORIES LTD.FUJITSU LABORATORIES LTD.In this paper, we propose a practical simulation method for designing Loop Heat Pipe (LHP) which is applied to cooling system for electronic devices. To realize rapid evaluation of cooling performance of LHP, the proposed performance estimation method calculates maximum heat transfer of LHP using 1D thermal-fluid network analysis. However, it is difficult to simulate phase-change of working fluid in LHP accurately with 1D model, since each component of LHP is modeled into a simple 1D network and its detailed shape is not considered enough. Especially, evaporator wick is indispensable component of LHP for determining its maximum heat transfer, and it is required to predict wick dry-out, where working fluid is dried in many pores of wick and LHP does not work as a result. The proposed simulation method introduces a wick pore inactivation model which depends on both input heat and wick pore diameter distribution to consider wick dry-out. The inactivation model applied to calculating wick permeability which determines pressure loss of wick. By fitting the wick permeability model to measured temperature distribution and maximum heat transfer of a LHP prototype for server systems, we show that our model estimates maximum heat transfer within allowable error compared to the experimental value.https://www.jstage.jst.go.jp/article/transjsme/80/818/80_2014trans0288/_pdf/-char/endigital engineeringoptimal designheat transfer designgas-liquid two-phase flowthermal-fluid network analysisloop heat pipe |
| spellingShingle | Izumi NITTA Sachio KOBAYASHI Hiroki KOBAYASHI Masayoshi HASHIMA Yuichi SATO Susumu OGATA Takahiro KIMURA A performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick pores Nihon Kikai Gakkai ronbunshu digital engineering optimal design heat transfer design gas-liquid two-phase flow thermal-fluid network analysis loop heat pipe |
| title | A performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick pores |
| title_full | A performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick pores |
| title_fullStr | A performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick pores |
| title_full_unstemmed | A performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick pores |
| title_short | A performance estimation method of Loop Heat Pipe with a wick permeability model considering dry-out of wick pores |
| title_sort | performance estimation method of loop heat pipe with a wick permeability model considering dry out of wick pores |
| topic | digital engineering optimal design heat transfer design gas-liquid two-phase flow thermal-fluid network analysis loop heat pipe |
| url | https://www.jstage.jst.go.jp/article/transjsme/80/818/80_2014trans0288/_pdf/-char/en |
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