Abstract: A correcting algorithm is provided to work out regression equations to process the experimental results of cooling capacity (CC) and energy efficiency ratio (EER) of room air conditioner(RAC) when dry-bulb and wet-bulb temperatures (D&WBTs) change in the allowances set in national standard in China. Thereby, values of CC and EER under nominal working condition can be worked out. A case of the correcting algorithm is illustrated based on the experimental results of CC and EER with indoor D&WBTs changing in the allowances under space cooling condition. Based on the experimental results, the multiple high order equation is adopted to solve the regression equations of CC and EER respectively. Bessel formula is adopted to verify the convergence. The analytic hierarchy process (AHP) is adopted to present a quantitative analysis of the D&WBTs’ influence on CC and EER; thereby, the correcting equations for CC and EER with D&WBTs changing within the allowances are obtained. Within the allowances set in the national standard, these two correcting equations can correct all experimental results of CC and EER under any working condition, based on which energy efficiency of the RAC unit can be more accurately classified. This correcting algorithm can help to evaluate the energy efficiency grade of a RAC unit more accurately, and help to optimize the currently enacted RAC performance testing methods.

Key words: cooling capacity, correcting algorithm, dry-bulb and wet-bulb temperature allowances, energy efficiency ratio, room air conditioner