Performance Evaluation of Gas-Fired Heating and Hot-Water Boilers Based on Principal Component Analysis
In order to evaluate the performance of gas-fired heating and hot water combi-boilers, eight variables that related to combustion, heat exchange and exhaust flue gas have been selected for analysis, the variables are thermal efficiency, exhaust gas temperature, concentration of O2, CO, CO2 and NOx, number of burner blades and number of heat exchanger fins. In this study, 40 gas-fired combi-boilers which were selected randomly have been tested according to the standard GB 25034-2010 “Gas-fired heating and hot water combi-boilers”, and the test results were analyzed using the principal component analysis method. The analysis results indicated that the first four principal component are sufficient to explain the total variance of 91.653% of the original eight variables, the other factors that are abandoned has a weak effect and can be ignored. Therefore, it can be explained that the principal component extraction is feasible to analyze and evaluate the performance of the combi-boilers with the first four principal components. Based on the ratio of principal component contribution rate to cumulative contribution rate, a comprehensive evaluation model of principal components is obtained: F=0.457F1+0.226F2+0.180F3+0.137F4, the comprehensive evaluation index can be used for quantitative evaluation of the performance of gas-fired combi-boilers, and the principal component analysis can be used as a new method to evaluate the performance of gas-fired heating and hot water combi-boilers.
ISSN : 2180-3811 E-ISSN : 2289-814X
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