The total thermal resistance of this structure can be regarded as the sum of the thermal resistances of two pieces of vacuum glass. If it is a vacuum glass of the same structure, the total thermal resistance is twice that of a single vacuum glass.
That is, R double vacuum = 2R
Where R is the thermal resistance of a single vacuum glass
For example, the vacuum glass of No. 3 in Table 2 is taken as an example to form a double vacuum as shown in FIG. 6A “4L+0.15V+4+0.15V+4L†or as shown in FIG. B “4L+0.15V+4L+0.15V+4â€. glass.
Then R double vacuum = 2 × 1.06W-1m2K = 2.12 W-1m2K
Can calculate the K value of 0.44 Wm-2K-1
It should be noted that the positions of the Low-E films in the two structures A and B in Fig. 6 are different, and the K value is not affected, and only the temperature distribution of the three pieces of glass in actual use is affected.
Double vacuum glass has high thermal resistance, low K value, and is very thin, can be about 9mm thick, and can also be made into double vacuum layer laminated safety glass, which has good development potential.
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