Non-steady calculation method for bus air-conditioner cooling load

Based on bus body non-steady heat conducting, this paper presented a calculation method of air conditioning dynamical cooling load in order to realize air temperature self-regulation in bus interior. The calculation included the per-hour load produced by heat conduction through compartment and windows in a harmonic response method, the per-hour load produced by ventilation considering fresh air enthalpy as a periodic variable, the heat emission of human body and electronic equipments in steady heat conducting method, and the sum of above values. Applying it to a bus, it was pointed that the cooling load reached the maximum at 2:00 pm and the maximum value lowered 8.3% compared to steady calculation method. 2 tabs, 1 figs, 7 refs.