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ISO7547-2002-09-01
5.3 Solar heat gain
Solar heat gain, Φs, is calculated, in watts, as follows:
svrgs A KT AG Φ∆ =+ ∑∑
where
Av is the surface exposed to solar radiation in square metres (side scuttles and rectangular windows are not
included);
k is the total heat transfer coefficient in accordance with 5.2.3 or 5.2.4 for a ship structure (deck, outer
bulkhead, etc.) within the surface Av;
∆Tr is the excess temperature (above the outside temperature of + 35 °C) caused by solar radiation on
surfaces as follows:
∆Tr
= 12 K for vertical light surfaces,
∆Tr
= 29 K for vertical dark surfaces,
∆Tr
= 16 K for horizontal light surfaces,
∆Tr
= 32 K for horizontal dark surfaces;
Questions:
为什么 light surfaces 的∆Tr会比dark surfaces 的数值要小
confused, 期待前辈指点
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发表于 2011-8-9 14:57
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