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Subject: RE: Natural gas and Electricity generation
Posted: 3/22/2007 Viewed: 1890 times |
Sorry for my (habitually) slow reply Danilo,
>>What is the difference of putting the output fuels electricity in the
Natural Gas production process as compared to Electricity Generation
output fuels and natural gas as a process? Will there be a double
accounting on the output figures?
In your data set, it looks like electricity is generated from the
Electric Generation module, so it should indeed be listed as an output
fuel there. I am not really sure why it is listed under "CNG Natural
Gas Production" unless electricity is indeed a by-product of that
In general, it is OK for fuels to be produced as outputs from more than
one module and this will not generally cause a double-counting of
outputs. However, it is important to set the switches on the Outputs
Properties screen correctly and bear in mind also that each module is
"dispatched" in order from the top of the Transformation module list
down to the bottom. So for example, if you have one CHP module that
produces a small amount of electricity and then a Central Generation
module that produces the remaining electricity requirements you would
A) Have the small CHP module above the Central Generation module in the
list of modules.
B) Enter a constraint on the amount of capacity in the CHP module (so it
does not meet all the requirements)
B) Set the Outputs properties switch for the CHP module to "When there
is a Shortfall in Production...Requirements Remain Unmet". (Otherwise
LEAP will simply import electricity to make up the shortfall and then
the Central Generation Module will not run at all.
It is also possible to set-up more complex systems where the outputs of
one module are needed as inputs (feedstocks or auxiliary fuel
requirements) by another module that appears further down in the list of
modules. LEAP deals with this situation by using an iterative
calculation technique. More on this here:
I hope this helps!
Subject: [LEAP] Natural gas electricity generation
Hi! I am now setting up new areas for the Philippine Energy Plan for
our 2004-2030 update. What is the difference of putting the output
fuels electricity in the Natural Gas production process as compared to
Electricity Generation output fuels and natural gas as a process? Will
there be a double accounting on the output figures?
Danilo N. Javier
Senior Science Research Specialist
Policy Formulation and Research Division Energy Policy and Planning
Tel: 8401401 loc. 270, 8401637