# Lumped cooling time
# Scope: Lumped Newton cooling to an intermediate temperature; uniform body.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

mass = 0.5 kg
heatCapacity = 900 J/(kg*K)
conductance = 5 W/K
initialExcess = 60 K
finalExcess = 10 K

timeConstant := mass*heatCapacity/conductance [s]
duration := timeConstant*log(initialExcess/finalExcess) [s]

check cooling time budget: duration <= 300.0 s

scenario alternative: mass = 0.4 kg