Heating Of The Time-sharing Partition Building Thermal Load Calculation And Palisade Structure Optimization

Through the establishment of the room heat balance equation, and the analysis of heat transfer process of retaining structures, this article describes the thermal state of the room with time-sharing partition heating. Using numerical simulation method is applied to solve the heat load for the room and introduced epsilon heat load coefficient ? to analyze heat load characteristics, in order to simplify the time-sharing partition heat load calculation.On the analysis of the heat load characteristics, first setting a room as the research object, analyses the heating mode, the heat transfer of preheating process, adjacent room heat load characteristics and the influence regularity of room temperature. And then combined with a six-story building to simulate the heat load calculation, analyses the energy consumption, thermal load properties of solution and room temperature characteristic of the typical urban building in Xi'an, Taiyuan and Wuhan in continuous heating and intermittent heating, local heating and heating of the time-sharing partition, a total of six kinds of heating. And according to the different boundary conditions of the different heating modes this article got the heating of the heat load coefficient under different boundary conditions of epsilon value range, to simplify the time-sharing partition heat load calculation is reference. Finally, the thermal inertia of palisade structure and thermal insulation form had been analyzed and discussed.1. Analyzed the time-sharing partition of heating room heat load, and the heating mode, the heat transfer of preheating process and adjacent room heat load coefficient ? of the influence law of epsilon. Setting a room as the research object, get the following conclusions:1) For intermitting once daily but different intermittent time to room, if the intermittent time extends each hour, coefficient of heat load ? increases the same change trend, and get the heat load coefficient of variation of the south and north room. 2) If the intermittent total duration is fixed, and the intermittent frequency is different, with the intermittent total duration 8h mode during a day, the heat load under different intermittent frequency coefficient ? changes within 5%, and once increase or decrease total intermittent time, such as changes in 2h, the coefficient of heat load ? changes about 15% lost. 3) Analyzed that if the initial moment room heating load coefficient ? is larger, extending preheating time is necessary, and it has calculated preheating the intermittent heating room. 4) This article pointed out the two kinds of adjacent room heat transfer whose temperature is different. It got the inner wall heat transfer under different temperatures and due to the wall of the heat storage at the same time, with the increasing of the heating room and adjacent room temperature difference, heat load increment also gradually increased.2. In different urban residential building using intermittent heating mode 2, compared with continuous heating energy consumption, the energy saving rate is between 5% ~ 12%, energy-saving effect is not obvious. Local heating of the heating pattern 3 and time-sharing partition mode 4-2 energy saving rate is close, and the specific energy saving effects associated with outdoor parameters. Time-sharing partition heating mode energy-saving rate of 4-1 and 4-3 room due to further reducing the heating time is higher than the other four patterns, but mode 4-3 north room indoor lowest temperature is close to 6.5?, so it needs to enhance the heat preservation measures.Comparing the heating modes, it is concluded that calculating add a non-heating adjacent room, the change of the average temperature of heating room are followings: south room decreases about 1 ?, and north room decreases about 2.4 ?. In mode 4-2 who's the pattern of the secondary rooms are heating, the average temperature of the south and north room increase about 0.5 ? and 1.9 ?.3. It analyzed the heating room in different boundary conditions under the heating modes, and calculated the average heat load coefficient ?. In the local heating and time-sharing partition heating mode, the top floor room heating load coefficient ? take larger value, and the underlying room take smaller values. In the intermittent heating mode 2, the standard layer room heating load coefficient can be higher than that of the top and bottom ones.4. The building heat load increase mainly related to the decrease of the heat load index D. Changing palisade structure thermal inertia has a small effect on heat load. Heat load decreases about 5% on average if the palisade structure of the room is heavy qualitative material. In enclosure structure material is the same situation, in the form of internal and external thermal insulation, insulation heat load changes little, but considering that the external thermal insulation on the economy and the heat preservation effect is superior to the insulation, the proposal is still in the form of external thermal insulation.