Characterisation of a controllable loop thermosyphon for precise temperature management
| Autor: | Gang Pei, Jingjing Yu, Jingyu Cao, Weixin Liu, Qiliang Wang, Chuxiong Chen, Wei Ren, Dongsheng Jiao, Mingke Hu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Temperature control
Materials science Continuous operation 020209 energy Energy Engineering and Power Technology Mechanical engineering 02 engineering and technology Industrial and Manufacturing Engineering Refrigerant Loop (topology) Heat pipe 020401 chemical engineering Heat transfer Thermal 0202 electrical engineering electronic engineering information engineering Thermosiphon 0204 chemical engineering |
| Zdroj: | Applied Thermal Engineering. 185:116444 |
| ISSN: | 1359-4311 |
| DOI: | 10.1016/j.applthermaleng.2020.116444 |
| Popis: | Controllable loop thermosyphon in frequently start-stop operation offers an efficient heat transfer regulation. This low-cost device has a great protentional in precise temperature management of refrigerators, industrial buildings, and cutting-edge equipment. In this study, a test platform is built to investigate the thermodynamic characteristics of controllable loop thermosyphon and its effectiveness on precise temperature control of a fresh-keeping box. The comprehensive behaviours in continuous and start-stop operations are explored using R407C, R410A, R404A and R134a as working fluids. The filling ratios for above refrigerants are optimised, and the influence of thermal boundaries are studied. Given a suitable filling ratio of R407C, the average fresh-keeping temperature is reduced from 25 °C to 5 °C in 90 min and to 0 °C in 180 min during continuous operation. In start-stop operation, a minimum fresh-keeping temperature fluctuation of ± 0.3 °C is achieved at various fresh-keeping temperatures. The maximum and average heat transfer rates in the running period are 74.0–94.5 W and 48.3–80.2 W, respectively. Results indicate that the controllable loop thermosyphon with R407C provides efficient heat transfer and thermal control, and thus perform well in precise temperature management. |
| Databáze: | OpenAIRE |
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