I am trying to calculate the U-value of different wall sections. That's why I need the R-value database.
Here's a list of the resources I would investigate:
The materials in (2) are available in the OpenStudio via:
Also, the OpenStudio API can be used to get components from the BCL. See these previous questions for more information:
Thank you very much for the response.
Hi, Appendix A (Tables 3.1) in ASHRAE 90.1 has information on the relation between equivalent U-values and R values of wall sections. By general definition, U-value is the ratio of the conductivity to the thickness of a material, and R-value is the reciprocal of the U-value. Hope this answers your question.
Thank you very much
In case you do not have easy access to 90.1. The reference appendices for Title 24 Section 6 include tables giving the U-Values for different wall and roof assemblies developed using the approach outlined in the 2009 ASHRAE Handbook of Fundamentals.
http://www.energy.ca.gov/2012publicat...
starting on pdf page 137
Thank you for the suggestion
The U value takes into the account the film coefficients on the outside and the inside. For complex walls and roofs, with thermal bridges, there is a publication of ASHRAE that lists numerous structures with their U values, sorry I dont have the reference at hand.
Thank you very much
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