Heat transfer modeling
My question: Because SRI capabilities of newly developed products are outpacing accepted modeling techniques and with antiquated static R values still being primarily used in overall calculations where/what would be the best avenue (DOE, IECC, TAMU-TERP, ASHRE) for someone who has developed enhanced modeling capabilities that provide a more accurate functional measure of heat transfer and subsequent energy use?
Common knowledge:
1. R value quantifies conduction: (1 of 3) measures of heat transfer in thermodynamics.
2. Derivation of R value from k is very manipulatable (changing temperatures- ΔT).
3. At least 2 delta T’s are now required for R value quantification, however models do not incorporate this as a dynamic R value.
4. Most insulation’s R value is inversely proportional to increasing delta t’s
A) IECC code accepts ASTM 518 with a ΔT of only 3° F to quantify R value
B) No insulation is needed at a ΔT of 3°
C) A static R value at this low ΔT leads to wildly inaccurate modeling
5. New Energy Codes require radiant barriers with reflectivity, emissivity or SRI values yet few models take these primary heat transfer methods into account.
6. Angle of incidence and capacitance of course exist yet are also rarely quantified in overall heat transfer modeling
