The model defines the dynamic behavior of the CHP thermal mass (i.e. engine block,
encapsulated working fluid, and internal heat exchange equipment) using a single,
engine control volume.
The thermal energy stored within this volume is quantified using an aggregate
thermal capacitance capEng
and an equivalent average engine temperature
TEng
.
The heat transfer between the engine and the cooling water control volume is
quantified using the overall thermal conductance UAHex
,
while the heat loss to the surroundings is quantified using the overall thermal
conductance UALos
.