Tanel Laasma 1/24/2011

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Hi!

I have a model, where electricity is generated in condensing power plants, heat is generated in boilerhouses and heat&electricity is generated in CHP plants(Main output "fuel" is Heat).

In transformation tree, they are in current order:

T&D Losses
CHP
Heat Production in Boilerhouses
Electricity Generation in Condensing Plants

If I enter the base years's historical production, then all is OK.
But for the simulated years, LEAP seems not to include "Heat Production in Boilerhouses." Heat production's Output is 0 in the simulated years.


And when I change my transformation tree to this:
T&D Losses
Heat Production in Boilerhouses
CHP
Electricity Generation in Condensing Plants

then LEAP doesn't include CHP production for the simulated years (Output value for CHP is 0, in the years after the base year).

Could i please get some insight, why LEAP uses only the upper heat producing module to produce heat in the simulation years?

And how could i do so, that LEAP doesn't produce all the heat from upper module, that's output fuel is "heat" ?

Charlie Heaps 1/25/2011
 

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Hello,

Most probably you have created a situation where the top module (CHP) is able to meet all the demand for heat. Thus LEAP sees no need to run the subsequent heat production module. The key to getting this to work propoerly is make sure that you relaistically constrain the top modules by entering some capacity data.

In addition you will need to set the Output fuel properties of the top modules so that no "gap filling" imports occur. You can do this by setting the "shortfall rule" property. If imports are allowed to occur, these two will meet all the demands for heat, leaving no reason to run the lower down modules.

I hope this helps!

Charlie