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本文基于对室内温度、围护结构内表面温度、风口参数等实测数据,分析了顶棚辐射结合下送风供冷系统运行过程中系统换热量、人体热舒适性变化规律,以及操纵量、扰动量对被控量的影响。研究结果表明:系统净辐射换热量、对流换热量和总换热量在系统开启的前1.5 h内递增,之后趋于稳定,系统稳定时,辐射换热量占总换热量的43%,余下57%冷量由风系统承担,此时,PMV和PPD值均在ISO7730的推荐值范围内。室内空气温度和作用温度随着扰动量和操纵量的增加而增加;当室外空气温度相对较低或较高时,室内发热量或平均水温较低时,室内空气温度和作用温度的增加率较小;室内空气温度和作用温度随着送风温度呈近似线性增加。
Based on the measured data of the indoor temperature, the inner surface temperature of the envelope, the parameters of the tuyere and so on, this paper analyzes the heat exchange coefficient of the system and the thermal comfort of the human body during the operation of the air-supply and cooling system under the roof radiation, The amount of the controlled amount of influence. The results show that the net radiation heat transfer, the convective heat transfer and the total heat exchange increase gradually within 1.5 h before the system is turned on, and then tend to be stable. When the system is stable, the radiation heat transfer takes 43% of the total heat exchange %, The remaining 57% of the cooling capacity by the wind system, at this time, PMV and PPD values are within the recommended range of ISO7730. When the outdoor air temperature is relatively low or high, indoor air temperature and operating temperature increase with the increase of disturbance and control volume. When indoor heating value or average water temperature is low, the increasing rate of indoor air temperature and working temperature Small; indoor air temperature and temperature with the supply air temperature increased approximately linearly.