Heat Plant Constraints Fuel Offtake Coefficient

Units:	GJ (Metric), MMBtu (U.S. Imperial)
Mode:	Input Only
Multi-band:	False
Default Value:	0
Validation Rule:	Any Value
Key Property:	No
Description:	Coefficient of fuel offtake

Heat Plant Constraints Fuel Offtake Coefficient is the left-hand side term on the total fuel used (Fuel Offtake) in the constraint.

With the coefficient represented by a_(i,j) the following term is added to the formulation:

... + a_(i,j) × ∑ ( i ) heat plant Fuels Offtake ( i ) ... {≤, ≥, =} b_j

where:
i indexes the Fuels used by the heat plant

By default, this sum is taken over all heat plant Fuels. However you can limit the set of Fuels included in the sum by adding Heat Plant Fuels memberships with no associated property definitions. This is a special case of using 'null' memberships to filter the terms included in another constraint property.