Previous experimental studies have shown that the alternating operation of the combined floor and Kang heating terminal has obvious advantages in satisfying the differentiated thermal demands, but it is still difficult to meet the indoor air temperature and bed temperature at the same time. For better use of the combined heating terminal, more in-depth simulation and optimization research are carried out. Firstly, based on the experimental research, an analysis model of heat dissipation performance of the combined heating terminal with alternating operation is established, and the accuracy of the model is verified by the experimental data. Secondly, by setting up the meteorological data of typical building and typical day, the heat storage/release performance of the combined heating terminal and its influence on thermal environment in the alternating operation process are simulated and analyzed. The design parameters, operation parameters and strategies are explored based on the temperature response time and the satisfaction degree of differentiated thermal demands. The influence characteristics of each parameter of the combined heating terminal on the thermal environment are obtained. Finally, the energy consumption under two different working conditions of the combined heating terminal temporal-spatial partitioned and the traditional comprehensive heating mode is compared and discussed. The results show that the energy saving rate of the combined heating terminal temporal-spatial partitioned heating mode can reach to 27.3%. The research results can provide a design basis for the application of combined floor and Kang heating terminal in the rural buildings in northwest China.
