Li Yuchun, Cai Zhihong, He Yongfeng. Operation Rule Study of Electronic Expansion Valve in ASHPWH with Economizer[J]. Journal of refrigeration, 2013, 34(1).
Li Yuchun, Cai Zhihong, He Yongfeng. Operation Rule Study of Electronic Expansion Valve in ASHPWH with Economizer[J]. Journal of refrigeration, 2013, 34(1). DOI: 10.3969/j.issn.0253-4339.2013.01.052.
A heat pump with economizer is studied by experiment under the conditions: dry-bulb temperature of inlet air is from -15℃ to +20℃
while inlet water is from 33℃ to 55℃.By change the opening of the electronic expansion valves in the main pipe line as well as in the injection pipe line
it shows that the main pipe line valve optimum opening is getting smaller when inlet water is getting warmer
and optimum opening is getting larger when inlet air is getting warmer
while the injection pipe line valve optimum opening goes oppositely . Some analysis and explanation on the rule is carried out. The rule can be used to guide to product optimization.