about storage processes
#3
I have been playing around with the different parameters related to storage devices (across time-slices). I have two concerns with the STG_LOSS parameter:

1) As VAR_ACT_s represents the energy stored at the beginning of time-slice s (p.229 of part II), wouldn't it be more rational to use G_YRFR_s-1 in the equation on p.230 of part II ?


2) A second, and more critical issue I have is that, when analyzing the numerical value of the storage losses, remarkably low values of losses occur which do not correspond to the ones I calculate by hand by following the equation on p.230.

As a test case, I use a storage device with STG_EFF equal to 1, and STG_LOSS equal to 0.25.

I used 4 seasonal time-slices (SU, FA, WI, SP, each lasting 25% of the year) and three daynite time-slices (D,P,N in that order, day and night representing 40% of the 'day', while peak represents 20%) => G_YRFR = 0.1 for WID and WIN, and G_YRFR = 0.05 for WIP.

The storage process is declared on the DAYNITE level as is the stored commodity. The storage device is only used in the winter (as I made sure that demand couldn't be reached without the storage device in the winter-peak).

I get the following values:

Period 2010 2010 2010
Attribute Vintage\TimeSlice WID WIP WIN
VAR_Act 2010 0.000648133 3.153816015
VAR_FIn 2010 3.1536 0.000648222
VAR_FOut 2010 3.1536
G_YRFR 0.1 0.05 0.1

My calculations state that the activity variable of WIP (given all values of WID), should amount
3.134652504
, which is clearly lower than the ones according to VEDA/TIMES.

As I increased the STG_loss parameter, the difference between what I calculate and the VEDA/TIMES results diverge stronger.

Does anyone has an idea what is going wrong here?

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Messages In This Thread
about storage processes - by kxxu - 18-07-2013, 04:26 AM
RE: about storage processes - by Ville_O - 15-03-2022, 02:30 PM
RE: about storage processes - by Antti-L - 15-03-2022, 02:44 PM
RE: about storage processes - by Antti-L - 15-03-2022, 02:48 PM
RE: about storage processes - by Ville_O - 15-03-2022, 03:43 PM
about storage processes - by Antti-L - 18-07-2013, 09:26 AM
about storage processes - by Poncelet_K - 03-01-2014, 05:49 AM
about storage processes - by Antti-L - 03-01-2014, 09:32 AM
about storage processes - by Poncelet_K - 06-01-2014, 04:50 AM

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