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对于具有隔热车体的车辆(例如机械冷藏车、空调客车),维持车内所需要的温度条件,只有在使用有效隔热和高气密性的车体时,才能获得最经济的节能效果。在评定车体热阻和气密性时,要确定传热系数,它是在规定(稳定的)工况下,在单位时间内当车内外空气温差θ=t_(BH)Κ-t_H=1℃时,通过车体隔热壁单位表面积的平均热量。为此通常取用稳定的试验方法:车内空气用电加热器加热到预定的恒定(稳定)温
For vehicles with insulated bodywork, such as mechanical refrigerated trucks and air-conditioned buses, maintaining the required temperature conditions in the car, the most economical energy-saving effect can only be achieved by using an effectively insulated and highly air-tight body . When assessing the thermal resistance and airtightness of a vehicle body, it is necessary to determine the heat transfer coefficient, which is the temperature difference between the inside and outside of the vehicle within the unit time θ = t_ (BH) Κ-t_H = 1 ° C under the specified (steady) When, through the body heat wall unit surface area of the average heat. For this purpose, a stable test method is usually used: the interior of the vehicle is heated with a heater to a predetermined constant (stable) temperature