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On the estimation of sorption isotherm coefficients using the optimal experiment design approach. (arXiv:1704.06565v1 [physics.app-ph])
来源于:arXiv
This paper deals with an inverse problem applied to the field of building
physics to experimentally estimate three sorption isotherm coefficients of a
wood fiber material. First, the mathematical model, based on convective
transport of moisture, the optimal experiment design (OED) and the experimental
set-up are presented. Then measurements of relative humidity within the
material are carried out, after searching the OED, which is based on the
computation of the sensitivity functions and a priori values of the unknown
parameters employed in the mathematical model. The OED enables to plan the
experimental conditions in terms of sensor positioning and boundary conditions
out of 20 possible designs, ensuring the best accuracy for the identification
method and, thus, for the estimated parameter. Two experimental procedures were
identified: i) single step of relative humidity from 10% to 75% and ii)
multiple steps of relative humidity 10-75-33-75% with an 8-day duration period
for each step 查看全文>>