Moisture Sorption Characteristics of Corn Stover and Big Bluestem

Table 2

The five most commonly used three-parameter isotherm equations for calculation of the equilibrium moisture content (EMC).

Model name	Equation	Eqtn no.
Modified Oswin	𝑀=(𝐴+𝐵𝑇)RH1−RH^1/𝐶	1
Modified Halsey	()𝑀=−exp𝐴+𝐵𝑇ln(RH)^1/𝐶	2
Modified Henderson	()𝑀=ln1−RH−𝐴(𝑇+𝐵)^1/𝐶	3
Modified Chung-Pfost	𝑀=−1𝐶()lnlnRH)(𝑇+𝐵−𝐴	4
Modified GAB	𝐴()𝑀=𝐶/𝑇𝐵RH(1−𝐵RH)(1−𝐵RH+(𝐶/𝑇)𝐵RH)	5

𝑀∶ moisture content, (% db); RH: relative humidity (decimal); 𝑇: temperature °C; 𝐴,𝐵, and C: constants specific to each equation.