【摘要】 碳中和愿景下，农村清洁供暖改造是实现能源低碳转型的重要环节。为使供暖系统改造时末端的选择更具科学化，基于Airpak软件建立某既有农宅的三维数学模型，比较典型截面的温度、速度及PMV-PPD值分布，对不同末端下的室内热环境进行研究，并利用层次分析法从经济性、热舒适性等4个方面，建立低温供暖末端评价体系。结果表明，在相同室内温度下，地板辐射供暖的室内热舒适性优于其他末端，暖风型风机盘管在合适的送风速度下，除射流直接影响区域外可基本满足热舒适性要求；针对北方既有农宅供暖末端的改造，选择在保留原有散热器的基础上增加散热器片数为最佳方案。研究结果在一定程度上可为北方农村地区室内热舒适性的改善及低温供暖末端的选择提供参考。更多还原

【Abstract】 Under the background of carbon neutrality, clean heating retrofitting in rural areas is an important procedure to realize the low-carbon energy transition. In order to shed light on the effects of heating terminals, the indoor thermal environment of different heating terminals is studied by comparing the temperature, velocity and PMV-PPD distributions used a three-dimensional model for the existing rural house based on Airpak. The evaluation system of low temperature heating terminal is established by using analytic hierarchy process from four aspects(i.e. economy, thermal comfort, etc). The results show that the indoor thermal comfort of floor radiant heating is better than that of other terminals under the same indoor temperature. The fan coil heating with a suitable supply air velocity can meet the thermal comfort requirements, except for the areas directly affected by the jet. As for the heating terminal transformation of the existing rural houses in the north, the optimal scheme is to increase the number of radiators and retain the original radiator. This work provides a guidance for improving the indoor thermal comfort and optimizing the selection schedule for the low-temperature heating terminal in rural areas of North China.更多还原