Source code for agronopy.crop.grain
import math
[docs]def modified_henderson_moisture(t, rh, a, b, c):
"""Equilibrium Moisture Equation Constants.
Empirical equilibrium moisture content equation: modified Henderson
equation. This equation can be used to calculate equilibrium moisture
content or equilibrium relative humidity with the constants below for
typical products.
"""
return 1 / 100 * (-math.log(1 - rh) / (a * (t + c)))**(1 / b)
[docs]def modified_henderson_relative_humidity(t, m, a, b, c):
"""Equilibrium Moisture Equation Constants.
Empirical equilibrium moisture content equations are the modified Henderson
equation and the Chung-Pfost equation. These equations can be used to
calculate equilibrium moisture content or equilibrium relative humidity
with the constants below for typical products.
"""
return 1 - math.exp(-a * (t + c) * (100 * m)**b)