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| Key Issues on Extreme High and Low Temperature Simulation Systems for Large Climatic Laboratory |
| Received:August 15, 2018 Revised:November 25, 2018 |
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| DOI：10.7643/ issn.1672-9242.2018.11.015 |
| KeyWord:climatic laboratory air handling system secondary refrigerant system charge/drain defrost |
| Author | Institution |
| LIU Hai-yan |
Aircraft Strength Research Institute of China, Xi?an , China |
| MA Jian-jun |
Aircraft Strength Research Institute of China, Xi?an , China |
| WU Xiang-fu |
Aircraft Strength Research Institute of China, Xi?an , China |
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| Abstract: |
| Objective To break through key technology and obtain the high and low temperature environment simulation system scheme for large climatic laboratory. Methods The workflow and work model of the secondary refrigerant system and air handling system were analyzed. Safety risks of the high and low temperature environment simulation system at extreme temperature were found. The necessity of frost in exchanger in low temperature test was deduced. Then a technical scheme for avoiding safety risk and frost was developed for secondary refrigerant. Results A charge/drain function is designed for secondary circulation of AS-6 and CH2CL2 systems to avoid the safety risks of secondary refrigerant. The inner and outer defrosting systems are combined to defrost the exchanger. Conclusion The auxiliary system solves the safety and frost problems in the temperature simulation systems and can be used in other similar projects. |
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