the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air.
heating cost=0,002Q(delta T)
and blower operating cost
Blower cost=2.6^(10^-9)Q^3
where Q= air quantity deliverd through the bed during season, m3/m2 bed area.
(delta T)= rise in temperature through heater.C
the values of Q and delta T also influence the time required ofor adequate drying of the grain according to the equation
Drying time = (80*10^6)/((Q^2) * delta T) days
using the geometric-programing method of constrained optimization .
-compute the minimum operating cost and optimum value of Q and delta T that will achive adequate drying in 60 days.
2 answers