Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection
A concentric annular heat pipe is designed for the thermal protection of infrared sensors in high-temperature environments. A key to thermal protection is the rapid analysis of the heat pipe's heat transfer characteristics, particularly in calculating thermal resistance and temperature, which r...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25000206 |
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| author | Jiazhi Sun Lixin Yang Jianjun Zhou |
| author_facet | Jiazhi Sun Lixin Yang Jianjun Zhou |
| author_sort | Jiazhi Sun |
| collection | DOAJ |
| description | A concentric annular heat pipe is designed for the thermal protection of infrared sensors in high-temperature environments. A key to thermal protection is the rapid analysis of the heat pipe's heat transfer characteristics, particularly in calculating thermal resistance and temperature, which remains challenging. To address this issue, a network model considering various structural and operational conditions is developed based on the CAHP heat transfer process and network theory. The model's accuracy is validated through experiments, and the effects of filling ratio, wick structure, and installation angle are analyzed. Model analysis results indicate that the thermal resistance is higher when the working liquid is in the wick, but the evaporator's circumferential temperature distribution is uniform. As the filling ratio increases, the vapor chamber transitions into a top gas and bottom liquid state. This leads to an increase in the temperature difference between the top and bottom regions of the evaporator and condenser. The heat pipes' thermal resistance with circumferential grid wick (CGW) is lower than that of circumferential uniform wick (CUW). However, there is a significant temperature difference between the CGW's wick-chamber region. When the evaporator is positioned below the condenser, the thermal resistance is lower, and temperature difference between the top and bottom regions of the evaporator and condenser is smaller. This study can provide theoretical guidance for the CAHP's structural design and sensor placement. |
| format | Article |
| id | doaj-art-b231373b917041efbf349d3ce6e34886 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-b231373b917041efbf349d3ce6e348862025-02-02T05:27:23ZengElsevierCase Studies in Thermal Engineering2214-157X2025-02-0166105760Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protectionJiazhi Sun0Lixin Yang1Jianjun Zhou2School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, 100044, ChinaSchool of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing, 100044, China; Corresponding author.AECC Shenyang Engine Research Institute, Shenyang, 110066, ChinaA concentric annular heat pipe is designed for the thermal protection of infrared sensors in high-temperature environments. A key to thermal protection is the rapid analysis of the heat pipe's heat transfer characteristics, particularly in calculating thermal resistance and temperature, which remains challenging. To address this issue, a network model considering various structural and operational conditions is developed based on the CAHP heat transfer process and network theory. The model's accuracy is validated through experiments, and the effects of filling ratio, wick structure, and installation angle are analyzed. Model analysis results indicate that the thermal resistance is higher when the working liquid is in the wick, but the evaporator's circumferential temperature distribution is uniform. As the filling ratio increases, the vapor chamber transitions into a top gas and bottom liquid state. This leads to an increase in the temperature difference between the top and bottom regions of the evaporator and condenser. The heat pipes' thermal resistance with circumferential grid wick (CGW) is lower than that of circumferential uniform wick (CUW). However, there is a significant temperature difference between the CGW's wick-chamber region. When the evaporator is positioned below the condenser, the thermal resistance is lower, and temperature difference between the top and bottom regions of the evaporator and condenser is smaller. This study can provide theoretical guidance for the CAHP's structural design and sensor placement.http://www.sciencedirect.com/science/article/pii/S2214157X25000206Concentric annular heat pipeThermal resistance networkFilling ratioInstallation angleThermal protection |
| spellingShingle | Jiazhi Sun Lixin Yang Jianjun Zhou Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection Case Studies in Thermal Engineering Concentric annular heat pipe Thermal resistance network Filling ratio Installation angle Thermal protection |
| title | Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection |
| title_full | Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection |
| title_fullStr | Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection |
| title_full_unstemmed | Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection |
| title_short | Research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection |
| title_sort | research on thermal resistance network model of concentric annular heat pipe heat for the sensor thermal protection |
| topic | Concentric annular heat pipe Thermal resistance network Filling ratio Installation angle Thermal protection |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25000206 |
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