| Title |
Evaluation of Mass Flow Rate Correlation of Electronic Expansion Valve Using R32 Heat Pump |
| Authors |
Min Kyu Kim ; Ji Hwan Jeong |
| DOI |
https://doi.org/10.6110/KJACR.2022.34.7.307 |
| Keywords |
전자식 팽창 밸브; 상관식 평가; 히트펌프; 질량유량; R32 Electronic expansion valve; Evaluation of correlation; Heat pump; Mass flow rate; R32 |
| Abstract |
The internal flow of an electronic expansion valve is complex. Many researchers have proposed mass flow correlations in various ways to predict the mass flow through an electronic expansion valve. However, the evaluation of the correlation equation was insufficient, and in this paper, data of the R32 heat pump system was acquired to evaluate correlations. The orifices of the electronic expansion valve used in the experiment were 2.40 mm and 1.65 mm, respectively. The acquired data were inputted into the existing correlation and compared. The correlational MAPE evaluated from the data of the electronic expansion valve with an orifice diameter of 2.40 mm was from 9.07% to 334.52%, SD showed from 4.34% to 206.37%. Correlated MAPE evaluated from the data of the electronic expansion valve with orifice diameter of 1.65 mm was from 24.07% to 160.82%, SD was from 6.00% to 177.11%. As a cause analysis, there is a difference in the geometric shape and size of the electronic expansion valve. Also, the change in physical properties depending on the refrigerant was one of the causes of the error. |