Study on a novel variable capacity technology and control strategy for refrigerated shipping container unit

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Hua, Kaitai^1

Hunan Vocational College of Modern Logistic, Changsha, China^1

关键词: Control strategies;    Electronic expansion valves;    Experimental test;    Hot gas valves;    Hot-gas bypass;    Shipping containers;    Variable capacity;    Variable frequencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/5/012050/pdf
DOI  :  10.1088/1755-1315/186/5/012050

来源: IOP

【 摘 要 】

A novel variable capacity system based on variable frequency compressor combined hot-gas bypass technology, was developed in the refrigerated shipping container unit. Then, numerical study had been carried out on control strategy for the variable capacity system. The schematic of variable capacity control in chilled mode/frozen mode was presented respectively. The detailed control models for the electronic expansion valve, inverter compressor, electronic hot-gas valve were developed. Finally, the novel variable capacity technology and control strategy was implemented in the experimental refrigeration unit system. Experimental tests for the refrigeration unit were carried out. The results of the experimental tests showed that in the refrigeration unit system, the novel variable capacity technology and control strategy based on combining variable frequency compressor with hot gas bypass technology, which could keep the inner temperature more stable. Therefore, the novel variable capacity technology and control strategy have been proved to be workable.