1. The heat transfer process is not consistent. The heat preservation function is the heat transfer process from outdoor to outdoor in summer, and the heat transfer is considered on weekdays; the heat insulation function reflects the heat transfer process from indoor to indoor and from outdoor to outdoor in winter, and the cycle is 24h on weekdays. Resolute heat transfer to consider.
2. The evaluation objectives are not consistent. The heat transfer coefficient k value [w/(m2.k)] or the heat transfer resistance R0 value [(m2.K/W] of the insulation function for the daily use of the insulation function is evaluated; the outdoor and indoor calculations of the insulation function for the winter use The lower (ie, the hotter weather), the lowest temperature inside and outside the enclosure structure is evaluated. It is assumed that the minimum temperature inside and outside is evaluated under the premise of abnormal winter outdoor and indoor calculation. It is assumed that the abnormal outdoor winter and indoor calculation premise Next, the minimum temperature inside and outside the table is lower than or equal to the outer temperature of the outer wall. The lowest temperature in the winter is roughly equivalent to the inner and outer temperature of the 240mm thick brick wall, which is considered to be in line with the winter heat insulation requirements.
3. The structural methods are not compatible. Because the insulation function of the envelope structure depends on the heat transfer coefficient K value or the heat transfer resistance R0, the insulation function of the envelope structure depends on the minimum temperature of the inner and outer surfaces under the premise of outdoor and indoor calculations in winter. . Regarding the external wall, the lightweight wall composed of porous lightweight insulation materials (such as black steel polystyrene or polyurethane foam sandwich wall) or porous lightweight insulation material has better internal insulation function, but because it is a lightweight wall Body, heat firmness is poor, or because it is light temperature and indoor air temperature wave contamination, the internal and external surface temperature rises randomly, that is, its heat insulation function is poor. It is also said that the heat preservation function is less affected by the structure of the house, and the heat insulation function is greatly affected by the structural arrangement. On the contrary, the composite wall of the data and thickness, the internal thermal insulation structure, and the heat insulation function are poor; the thermal insulation function of the external thermal insulation structure is better. The composition of the above situation can be understood from the calculation method and calculation results of the target of Baoping and insulation.