WIP: sketch of 2 variants to add commodity flow of capacity variables #387

volker-krey · 2020-08-19T04:29:14Z

The PR sketches two alternative variants that allow connecting a commodity flow to capacity addition and retirement.

variant 1: commodity input and output strictly associated with construction and retirement of capacity (commodity flow is strictly triggered in periods when new capacity comes online or is retired, in case of new periods being added, no user action is required)
variant 2: commodity input and output associated with operation of capacity at any period (more flexible as commodity flows can also be triggered before construction or after retirement, but requires adjustments by user in case new periods are being added to a model)

Comments on the two variants of adding commodity flow of capacity variables are appreciated.

message_ix/model/MESSAGE/parameter_def.gms

GamzeUnlu95 · 2020-08-21T10:40:36Z

For variant 2, for the case of retirement, the output value in the year (vintage + lifetime) will specify the material that is released upon retirement. I was wondering with the current formulation, isn't it the case that if the capacity is retired earlier than its lifetime, the material is still going to be released at the end of its lifetime even though it is retired earlier?

volker-krey · 2020-08-25T04:49:31Z

@GamzeUnlu95 good point. The implications of premature retirement for continuous commodity flow could be addressed in variant 2 by switching from the CAP_NEW to the CAP variable (equivalent to fix_cost), but to ensure that end-of-life release of commodities is treated correctly, we either have treat commodity flow beyond the lifetime in a special way or switch to variant 1.

…d of lifetime - limited variant 2 to inv_tec technologies - capacity-related commodity flows during lifetime are treated like fix_cost (via CAP variable) - capacity-related commodity flows prior to or after end of technical lifetime are triggered regardless of premature retirement (via CAP_NEW variable) - ATTENTION: commodity flows will only be triggered once the technical lifetime is reached, independent of the actual lifetime due to premature retirement

volker-krey · 2020-08-25T05:35:12Z

@GamzeUnlu95 please have a look at the revised formulation of variant 2. This now consistently deals with commodity flows during lifetime, but the issue of commodity flows after end-of-life remains unsolved. The question is whether this is an acceptable error.

…e retirement - restricted variant 1 equations to technologies with capacity

volker-krey · 2020-08-25T08:55:26Z

One issue that still needs attention are commodity flows upon capacity retirement if the vintage period (when the capacity was built) has a different length than the retirement period (period after last available of capacity). Since the CAP variables are normalized to annual construction, in such a case, the flow triggered upon retirement can be larger or smaller than intended. For the global model this is relevant in the transition from 5- to 10-year steps after 2060. A rescaling will need to be introduced.

- scaling factor adjusts for difference in length of construction and retirement periods of capacities in related commodity flows - added missing closing parenthesis to sums in commodity flow

khaeru · 2020-08-26T07:27:38Z

In today's MESSAGE meeting, regarding the new items (sets, variables, equations, and parameters) please look at #190, in particular the additions to message_ix.models.MESSAGE_ITEMS:

message_ix/message_ix/models.py

Lines 20 to 44 in 3203190

    
           # Common indices for some parameters in MESSAGE_ITEMS 
        
           _idx_common = ['node', 'technology', 'level', 'commodity', 'year', 'time'] 
        
           # NB only a partial list; see https://github.com/iiasa/message_ix/issues/254 
        
           #: List of ixmp items for MESSAGE. 
        
           MESSAGE_ITEMS = { 
        
               # Index sets 
        
               # Storage level 
        
               'level_storage': dict(ix_type='set'), 
        
               # Storage reservoir technology 
        
               'storage_tec': dict(ix_type='set'), 
        
               # Mapping set: mapping of storage reservoir to charger/discharger 
        
               'map_tec_storage': dict(ix_type='set', 
        
                                       idx_sets=['node', 'technology', 'storage_tec', 
        
                                                 'level', 'commodity']), 
        
               # Parameters 
        
               # Order of sub-annual time steps 
        
               'time_order': dict(ix_type='par', idx_sets=['lvl_temporal', 'time']), 
        
               # Initial amount of storage 
        
               'storage_initial': dict(ix_type='par', idx_sets=_idx_common), 
        
               # Storage losses as a percentage of installed capacity 
        
               'storage_self_discharge': dict(ix_type='par', idx_sets=_idx_common), 
        
           }

New additions due to this PR should be handled in the same way.

…d of lifetime - limited variant 2 to inv_tec technologies - capacity-related commodity flows during lifetime are treated like fix_cost (via CAP variable) - capacity-related commodity flows prior to or after end of technical lifetime are triggered regardless of premature retirement (via CAP_NEW variable) - ATTENTION: commodity flows will only be triggered once the technical lifetime is reached, independent of the actual lifetime due to premature retirement

…e retirement - restricted variant 1 equations to technologies with capacity

- scaling factor adjusts for difference in length of construction and retirement periods of capacities in related commodity flows - added missing closing parenthesis to sums in commodity flow

…d of lifetime - limited variant 2 to inv_tec technologies - capacity-related commodity flows during lifetime are treated like fix_cost (via CAP variable) - capacity-related commodity flows prior to or after end of technical lifetime are triggered regardless of premature retirement (via CAP_NEW variable) - ATTENTION: commodity flows will only be triggered once the technical lifetime is reached, independent of the actual lifetime due to premature retirement

…e retirement - restricted variant 1 equations to technologies with capacity

- scaling factor adjusts for difference in length of construction and retirement periods of capacities in related commodity flows - added missing closing parenthesis to sums in commodity flow

…ge_ix into material_stock

Jihoon

I've tested the functionality of this branch with the main MESSAGEix-Materials model, and it is working as it is expected without generating additional issues.

Jihoon · 2021-03-31T14:55:57Z

This one is now superseded by #451.

sketch of 2 variants to add commodity flow of capacity variables

a222872

volker-krey requested review from GamzeUnlu95, Jihoon, OFR-IIASA and danielhuppmann August 19, 2020 04:36

Jihoon reviewed Aug 19, 2020

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volker-krey added 2 commits August 25, 2020 10:40

expanded variant 1 to include retirement, incl. treatment of prematur…

70e383b

…e retirement - restricted variant 1 equations to technologies with capacity

merged variants 1 and 2 of capacity related commodity flows

d6fc881

added scaling factor to account for period length difference

2f6ae96

- scaling factor adjusts for difference in length of construction and retirement periods of capacities in related commodity flows - added missing closing parenthesis to sums in commodity flow

GamzeUnlu95 approved these changes Aug 25, 2020

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volker-krey added 2 commits August 25, 2020 12:59

added new parameters to data loading from GDX

43a4ec8

auto documentation for capacity related commodity flow added

34a1e89

volker-krey added 12 commits September 23, 2020 06:30

corrected commodity at end of life of capacities to be on annual basis

f1f7106

sketch of 2 variants to add commodity flow of capacity variables

6d7d600

expanded variant 1 to include retirement, incl. treatment of prematur…

3ae2e52

…e retirement - restricted variant 1 equations to technologies with capacity

merged variants 1 and 2 of capacity related commodity flows

4eccf76

added scaling factor to account for period length difference

952428a

- scaling factor adjusts for difference in length of construction and retirement periods of capacities in related commodity flows - added missing closing parenthesis to sums in commodity flow

added new parameters to data loading from GDX

4ec4881

auto documentation for capacity related commodity flow added

530fba8

corrected commodity at end of life of capacities to be on annual basis

dfc00ad

Merge remote-tracking branch 'origin/material_stock' into material_stock

a6576f5

corrected typos, wrong parenthesis and missing EOL symbols

0695a1c

corrected syntax and inter-period notation

5a14a79

volker-krey and others added 14 commits March 16, 2021 16:52

sketch of 2 variants to add commodity flow of capacity variables

ed0509d

expanded variant 1 to include retirement, incl. treatment of prematur…

5f3518a

…e retirement - restricted variant 1 equations to technologies with capacity

merged variants 1 and 2 of capacity related commodity flows

03356c2

added scaling factor to account for period length difference

869d8ad

- scaling factor adjusts for difference in length of construction and retirement periods of capacities in related commodity flows - added missing closing parenthesis to sums in commodity flow

added new parameters to data loading from GDX

8697db4

auto documentation for capacity related commodity flow added

76cfc10

corrected commodity at end of life of capacities to be on annual basis

a76df24

added scaling factor to account for period length difference

b1a9c99

- scaling factor adjusts for difference in length of construction and retirement periods of capacities in related commodity flows - added missing closing parenthesis to sums in commodity flow

corrected commodity at end of life of capacities to be on annual basis

7b53ff2

corrected typos, wrong parenthesis and missing EOL symbols

b5cce35

corrected syntax and inter-period notation

3cf0725

Merge branch 'material_stock' of https://github.com/volker-krey/messa…

d6cbda6

…ge_ix into material_stock

added six new capacity-related in-/output parameters to models.py

319daaf

volker-krey requested review from Jihoon and behnam-zakeri March 22, 2021 21:03

volker-krey self-assigned this Mar 22, 2021

volker-krey added the enh New features & functionality label Mar 22, 2021

Jihoon reviewed Mar 30, 2021

View reviewed changes

Merge branch 'master' into material_stock

f8c006f

Jihoon mentioned this pull request Mar 31, 2021

Add commodity flow of capacity variables #451

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WIP: sketch of 2 variants to add commodity flow of capacity variables #387

WIP: sketch of 2 variants to add commodity flow of capacity variables #387

volker-krey commented Aug 19, 2020 •

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Jihoon commented Mar 31, 2021

WIP: sketch of 2 variants to add commodity flow of capacity variables #387

WIP: sketch of 2 variants to add commodity flow of capacity variables #387

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