Research on burning velocity of R152a and its binary mixture

The burning velocity plays an important role in determining the safety level of new refrigerants. Based on the self-designed test system for burning velocity characteristics of flammable refrigerants, the burning velocities of R152a with different concentration were studied by vertical glass tube method. And the maximum burning velocity of R152a was analyzed, which was close to the standard recommended value. R1234yf with environmental advantages and lower flammability may form a new alternative refrigerant mixture with R152a. Therefore, the flame propagation and burning velocity characteristics of R152a + R1234yf were studied under the conditions of different component ratio and different concentration. Based on the theoretical analysis, three calculation methods for predicting the burning velocity of binary mixed flammable refrigerant were proposed for the first time. Then, three groups of predicted burning velocity of R152a + R1234yf under different composition or concentrations were calculated. Compared with the experimental data, it was found that the prediction accuracy of the component equivalent simplified method is the highest among the three methods. It was of great significance for the prediction of burning velocity and the assessment of safety level of new mixed refrigerant or flammable gas. ? 2021 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Automated summary

The study focused on the burning velocity characteristics of R152a and R1234yf, suggesting a potential new refrigerant mixture. Three calculation methods for predicting the burning velocity of binary mixed flammable refrigerants were proposed. The prediction accuracy of the component equivalent simplified method was found to be the highest among the three methods when compared with experimental data.