| 摘要 |
Provided is a method for predicting the flammable range of a thermodynamic cycle mixed working medium. The method predicts the upper flammable limit and the lower flammable limit of a mixed working medium respectively, and comprises establishing a flammable limit prediction model based on a critical flame temperature theory, then carrying out linear fitting on a flame limit value of an HCs/CO2 mixed working medium obtained from a test and a corresponding CO2 volume fraction according to the predication model, and obtaining an undetermined coefficient in the predication model so as to obtain an optimal flammable limit prediction model. The method overcomes the defect that a theoretical prediction model needs to depend on the selection of an appropriate critical flame temperature to be determined, greatly improves the predication precision, ensures the accuracy of the flammable limit predication data of the HCs/CO2 mixed working medium, and provides an accurate reference basis for the safety assessment in the case where this type of mixed working medium is applied to a thermodynamic cycle system. |
