Discussion: LEAP
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Charles Heaps
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Subject: RE: Natural gas and Electricity generation Posted: 3/22/2007 Viewed: 1623 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 process. 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 need to: 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: http://www.energycommunity.org/webhelp/transformation/calculation_of_tra nsformation_systems_with_feedback_flows.htm I hope this helps! Charlie -----Original Message----- 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? Thanks. Danilo N. Javier Senior Science Research Specialist Policy Formulation and Research Division Energy Policy and Planning Bureau Tel: 8401401 loc. 270, 8401637 |
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