Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics
Given the varying flight conditions and mission requirements that affect aircraft cold sources and heat loads, it is crucial to investigate the dynamic behavior of a two-phase mechanically pumped cooling loop (MPCL) for avionics. Here, an experimental MPCL system charged with R134a was established,...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25000905 |
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| author | Shaohuan Qi Zhaohao Xu Jiale Wang Yu Xu |
| author_facet | Shaohuan Qi Zhaohao Xu Jiale Wang Yu Xu |
| author_sort | Shaohuan Qi |
| collection | DOAJ |
| description | Given the varying flight conditions and mission requirements that affect aircraft cold sources and heat loads, it is crucial to investigate the dynamic behavior of a two-phase mechanically pumped cooling loop (MPCL) for avionics. Here, an experimental MPCL system charged with R134a was established, and its performance was evaluated under cold source temperatures of 16–46 °C and heat fluxes of 50–150 kW/m2. When the cold source temperature varies, the heating wall temperature and pressure drop are 33.7–60.0 °C and 78.0−119.6 kPa for unadjustable pump mode, and they are 34.1–60.0 °C and 59.6−124.6 kPa for adjustable pump mode. When heat load starts, the heating wall temperature and pressure drop rapid rise, and then stabilize. For low temperature start-up, the heating wall temperature is lower, but the pressure drop is usually higher compared to high temperature start-up. When heat load jumps, heating wall temperature and pressure drop rise and then stabilize regardless of pump mode. The pump mode has a minor impact on the heating wall temperature, but the pressure drop is greater in adjustable mode than in unadjustable mode. The findings indicate the designed MPCL can always tend to be stable when the cold source or heat load change. |
| format | Article |
| id | doaj-art-f46af49c79434b848f927a7483fdaee4 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-f46af49c79434b848f927a7483fdaee42025-02-08T05:00:28ZengElsevierCase Studies in Thermal Engineering2214-157X2025-03-0167105830Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionicsShaohuan Qi0Zhaohao Xu1Jiale Wang2Yu Xu3Key Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics, 29 Yudao St., Nanjing, 210016, ChinaKey Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics, 29 Yudao St., Nanjing, 210016, ChinaKey Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics, 29 Yudao St., Nanjing, 210016, ChinaCorresponding author.; Key Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics, 29 Yudao St., Nanjing, 210016, ChinaGiven the varying flight conditions and mission requirements that affect aircraft cold sources and heat loads, it is crucial to investigate the dynamic behavior of a two-phase mechanically pumped cooling loop (MPCL) for avionics. Here, an experimental MPCL system charged with R134a was established, and its performance was evaluated under cold source temperatures of 16–46 °C and heat fluxes of 50–150 kW/m2. When the cold source temperature varies, the heating wall temperature and pressure drop are 33.7–60.0 °C and 78.0−119.6 kPa for unadjustable pump mode, and they are 34.1–60.0 °C and 59.6−124.6 kPa for adjustable pump mode. When heat load starts, the heating wall temperature and pressure drop rapid rise, and then stabilize. For low temperature start-up, the heating wall temperature is lower, but the pressure drop is usually higher compared to high temperature start-up. When heat load jumps, heating wall temperature and pressure drop rise and then stabilize regardless of pump mode. The pump mode has a minor impact on the heating wall temperature, but the pressure drop is greater in adjustable mode than in unadjustable mode. The findings indicate the designed MPCL can always tend to be stable when the cold source or heat load change.http://www.sciencedirect.com/science/article/pii/S2214157X25000905Mechanically pumped cooling loopMPCLCooling of avionicsDynamic characteristics |
| spellingShingle | Shaohuan Qi Zhaohao Xu Jiale Wang Yu Xu Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics Case Studies in Thermal Engineering Mechanically pumped cooling loop MPCL Cooling of avionics Dynamic characteristics |
| title | Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics |
| title_full | Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics |
| title_fullStr | Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics |
| title_full_unstemmed | Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics |
| title_short | Dynamic characteristics of a two-phase mechanically pumped cooling loop for avionics |
| title_sort | dynamic characteristics of a two phase mechanically pumped cooling loop for avionics |
| topic | Mechanically pumped cooling loop MPCL Cooling of avionics Dynamic characteristics |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25000905 |
| work_keys_str_mv | AT shaohuanqi dynamiccharacteristicsofatwophasemechanicallypumpedcoolingloopforavionics AT zhaohaoxu dynamiccharacteristicsofatwophasemechanicallypumpedcoolingloopforavionics AT jialewang dynamiccharacteristicsofatwophasemechanicallypumpedcoolingloopforavionics AT yuxu dynamiccharacteristicsofatwophasemechanicallypumpedcoolingloopforavionics |