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Dear TRNSYS community, It seems that there are some differences between the “
Effective sky temperature” available in the weather component (e.g. Type 15-6)
and the “fictive sky temperature” calculated with the Type69b. The differences
are quite important and I would like to know which one I should “trust” to
calculate some IR-emissions towards the sky. I attached a simple testing project in which I plotted
the following graphs: 1.
The “effective sky temperature” , straight from
the weather component 2.
The ambient (dry-bulb) temperature 3.
The average between “effective sky temperature”
and “ambient temperature” 4.
The “fictive sky temperature” calculated by the
Type69b (using “total diffuse radiation” as an input) What comes out of this graph is that the “average
temperature” is quite close to the “fictive sky temperature” calculated by
Type69b. So where do the differences come from and which temperature
should I use? Thank you for your help. François Badinier Development Engineer ICAX Ltd 1 Hatfield House
Baltic Street
West London EC1Y OST |
Attachment:
Sky temperature testing.tpf
Description: Binary data