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Demand calculation
#1

Hello,

I am trying to check the final demand calculation.

As it is written in the manual the demand is calculated:

DEM=K*Driverelasticity

I am trying to check this calculation. Let's take for example TRL (DEM commodity) demand in the WEU region. So using the GDP as a driver and taking elasticity from "Demand_Alloc+series.xls" (ELASDM sheet)

Here is the link to the excel file with the calculations: uploads/93/demand_check.zip

The problem is that my calculation results do not meet the database data.

Can someone comment this?



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.zip   demand_check.zip (Size: 5.35 KB / Downloads: 1)
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#2

One more thing.

I have an error when trying to run VEDA-FE->Advanced functions->Demands master->Edit/view single demand:

uploads/93/demands_master_error.jpg

Have the latest VEDA-FE version 4.3.44

Do somebody know what might be the problem?



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#3

See if you have an error log file in the folder VEDA_FE\Logs\

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#4
Errors_Alexander Goryachev:

Version: 4.3.44

Model: TIMES LicType: VFTI
29/08/2011 14:10:54
Error while DRIVERS In Procedure frmDrivers.cmdView_Click
{1101} Bad function argument
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#5
i can't reproduce your error locally; will take a little longer than normal.
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#6
Ok. And what about the demand calculation? (first message)
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#7
Dear Amit,
We also noticed this issue that calculated energy servce demands are not the same as the projected demand in the VEDA FE. Where can I find further information on how energy services demands are projected in the VEDA FE?
Regards,
Gabrial
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#8
Dear Alexander, Dear Gabrial,

please take a look to the attached file and let me know if this solving your problems with demand projections in VFE. As you can see from the attached file I don't have any problem with demand projection in VFE.

uploads/33/Demand_projection_in_VEDA-Fe.pdf

Thanks,
Maurizio


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.pdf   Demand_projection_in_VEDA-Fe.pdf (Size: 217.92 KB / Downloads: 10)
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#9
Dear Maurizio,
Thanks for the responcse. Did you check with a value for sensitivity (elasticity) that is more or leass than one. We get different values between manual and VEDA FE demand projection when the sensitivity is hgiher or lower than one.
Regards,
Gabrial
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#10
I want to follow up on the question on how the demand projection is calculated
  • in case calibration and elasticities are being used, and

  • the value of the base year demand driver is not equal to one.


As I can see the question has not been answered.


I think the formula should go like

demand(t+1) = demand(t)  * calibration(t+1)  *  [1 + [(driver(t+1)/driver(t)) - 1] * elasticity(t+1)]  

But I was not able to reproduce the results of the model run.

Thanks a lot,
Martin
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#11
For the ETSAP-TIAM model, I have been able to reproduce the demand if I use the following equation:

Demand(t) = Demand(t-1)*(Driver(t)/Driver(t-1))^Elasticity(t)

It was derived by trial and error and I am not sure if this equation is documented in any literature....Does this equation work for your case?

Pernille
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#12
(01-10-2018, 07:38 PM)Pernille.S Wrote: For the ETSAP-TIAM model, I have been able to reproduce the demand if I use the following equation:

Demand(t) = Demand(t-1)*(Driver(t)/Driver(t-1))^Elasticity(t)

It was derived by trial and error and I am not sure if this equation is documented in any literature....Does this equation work for your case?

Pernille

Thanks for the fast response.

It only answers some aspect, as the elasticity is actually constant 1.00, but my calibration is not.

So the question remains: how does the calibration factor enter the formula?
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