Electrolyser Modelling
#33
(12-05-2019, 04:31 AM)Antti-L Wrote:
Abi Mohammed Wrote:Could you please have a look and give me some clarification on PCG and user defined PCGs.
I am not sure what kind of clarification is needed here. As far as the TIMES model generator is concerned, defining the PCG is basically the sole responsibility of the modeller. Under VEDA you have some automation that might be helpful, but it is always safest to define the PCG explicitly.

I am sure that by now you have also read the documentation which explains the PCG (Part II, section 2.2.1 Definition of the Reference Energy System (RES)):
Part II, section 2.2.1 Wrote:The activity variable (VAR_ACT) of a standard process is in most cases equal to the sum of one or several commodity flows on either the input or the output side of a process. The activity of a process is limited by the available capacity, so that the activity variable establishes a link between the installed capacity of a process and the maximum possible commodity flows entering or leaving the process during a year or a subdivision of a year. The commodity flows that define the process activity are specified by the set prc_actunt(r,p,cg,u) where the commodity index cg may be a single commodity or a user-defined commodity group, and u is the activity unit. The commodity group defining the activity of a process is also called Primary Commodity Group (PCG).
User-defined commodity groups are specified by means of the set com_gmap(r,cg,c), which indicates the commodities © belonging to the group (cg). Once a user-defined commodity group has been defined, one can use it for any processes for defining attributes that require a commodity group (not only for the definition of the process activity, but also for other purposes, e.g., in the transformation equation EQ_PTRANS), as long as the members of the group are valid for the particular process and the process characteristic to be defined.
Usually, it would make no sense defining NRG or MAT as the PCG, because normally only the input(s) / output(s) should define the activity, not both (excluding storage). Again, here VEDA has some shortcuts (NRGI, NRGO, MATI, MATO etc.). User-defined groups are needed when the individual commodities or the available shortcuts are not sufficient, for example, if you have three NRG outputs, but only two of them should be defining the activity (according to the model designer, i.e. you).
Thanks Antti for the clarification.

I have following questions related to the electrolyser modelling,

1) I need to represent the life time of electrolyser stack and electrolyser rest of systems separately. For example, my electrolyser life can be considered as 25 years, but the stack has to be replaced roughly in 7 years. So there is a repeated investment for the stack. Any suggestions how to model this? 

I tried something different by adding two additional processes other than the electrolyser process; one fictional process with zero cost converting the hydrogen produced by electrolyser back to electricity and then the next process representing additional investment (stack cost) which again produces hydrogen from this electricity. At first look, this seems to work fine (equal capacity is being invested for electrolyser process and for the process representing the stack which is what I wanted), but only when there is no partial load losses. However, when considering partial load efficiency, this approach has a problem. This is because my electrolyser produced hydrogen with a lower efficiency due to partial load and my fictional zero cost process which has to convert hydrogen back to electricity is working with a constant efficiency.

2) The partial load efficiency losses seems to work well for the existing electrolyser process. However, for the newly invested technologies, I am not able to see a drop in efficiency during low loads (even below the values defined by ACT_LOSPL~UP).  Always there is zero offline capacity for these newly invested electrolyser technologies. Why this is happening?
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Messages In This Thread
Electrolyser Modelling - by MohammedAbiAfthab - 08-04-2019, 02:43 PM
RE: Electrolyser Modelling - by Antti-L - 08-04-2019, 03:33 PM
RE: Electrolyser Modelling - by Pernille.S - 08-04-2019, 06:58 PM
RE: Electrolyser Modelling - by Antti-L - 09-04-2019, 03:10 AM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 11-04-2019, 05:54 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 02-05-2019, 08:08 PM
RE: Electrolyser Modelling - by Antti-L - 02-05-2019, 08:26 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 02-05-2019, 09:03 PM
RE: Electrolyser Modelling - by Antti-L - 02-05-2019, 09:36 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 03-05-2019, 03:11 PM
RE: Electrolyser Modelling - by Antti-L - 03-05-2019, 03:55 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 09-05-2019, 02:24 AM
RE: Electrolyser Modelling - by Anjana - 10-05-2019, 02:08 PM
RE: Electrolyser Modelling - by Anjana - 10-05-2019, 02:20 PM
RE: Electrolyser Modelling - by Antti-L - 05-05-2019, 11:21 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 06-05-2019, 01:42 PM
RE: Electrolyser Modelling - by Pernille.S - 06-05-2019, 05:58 PM
RE: Electrolyser Modelling - by Antti-L - 06-05-2019, 07:51 PM
RE: Electrolyser Modelling - by Pernille.S - 07-05-2019, 01:00 PM
RE: Electrolyser Modelling - by Pernille.S - 08-05-2019, 02:21 PM
RE: Electrolyser Modelling - by Antti-L - 08-05-2019, 02:31 PM
RE: Electrolyser Modelling - by Pernille.S - 08-05-2019, 02:35 PM
RE: Electrolyser Modelling - by Antti-L - 09-05-2019, 03:19 AM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 09-05-2019, 03:27 AM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 09-05-2019, 07:32 PM
RE: Electrolyser Modelling - by Antti-L - 09-05-2019, 08:16 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 10-05-2019, 01:28 AM
RE: Electrolyser Modelling - by Antti-L - 10-05-2019, 02:55 AM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 10-05-2019, 07:03 AM
RE: Electrolyser Modelling - by Antti-L - 10-05-2019, 02:48 PM
RE: Electrolyser Modelling - by Anjana - 10-05-2019, 03:41 PM
RE: Electrolyser Modelling - by Anjana - 17-05-2019, 12:54 PM
RE: Electrolyser Modelling - by Antti-L - 12-05-2019, 04:31 AM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 15-05-2019, 09:00 PM
RE: Electrolyser Modelling - by Antti-L - 15-05-2019, 10:32 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 17-05-2019, 02:20 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 17-05-2019, 06:26 PM
RE: Electrolyser Modelling - by Antti-L - 17-05-2019, 01:50 PM
RE: Electrolyser Modelling - by Anjana - 17-05-2019, 02:15 PM
RE: Electrolyser Modelling - by Anjana - 17-05-2019, 07:30 PM
RE: Electrolyser Modelling - by Antti-L - 17-05-2019, 07:37 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 17-05-2019, 08:58 PM
RE: Electrolyser Modelling - by Antti-L - 17-05-2019, 10:24 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 17-05-2019, 10:49 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 06-06-2019, 02:16 PM
RE: Electrolyser Modelling - by Antti-L - 18-05-2019, 09:35 PM
RE: Electrolyser Modelling - by Anjana - 19-05-2019, 02:38 AM
RE: Electrolyser Modelling - by Anjana - 18-05-2019, 11:17 PM
RE: Electrolyser Modelling - by Anjana - 18-05-2019, 11:59 PM
RE: Electrolyser Modelling - by Antti-L - 19-05-2019, 12:28 AM
RE: Electrolyser Modelling - by Anjana - 19-05-2019, 01:15 AM
RE: Electrolyser Modelling - by Anjana - 19-05-2019, 01:19 AM
RE: Electrolyser Modelling - by Antti-L - 19-05-2019, 01:34 AM
RE: Electrolyser Modelling - by Antti-L - 06-06-2019, 10:25 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 12-06-2019, 02:58 AM
RE: Electrolyser Modelling - by Antti-L - 12-06-2019, 02:05 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 06-07-2019, 01:15 AM
RE: Electrolyser Modelling - by Antti-L - 06-07-2019, 04:06 AM
RE: Electrolyser Modelling - by Antti-L - 08-07-2019, 02:44 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 08-07-2019, 04:11 PM
RE: Electrolyser Modelling - by Antti-L - 08-07-2019, 04:18 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 08-07-2019, 05:34 PM
RE: Electrolyser Modelling - by Antti-L - 08-07-2019, 06:09 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 08-07-2019, 06:38 PM
RE: Electrolyser Modelling - by MohammedAbiAfthab - 29-08-2019, 05:17 PM

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