Model Overview

Currently, H2I recognizes four types of models:

• Resource

• Converter

• Transport

• Storage

• Controllers

Resource

Resource models process resource data that is usually passed to a technology model.

Resource name	Resource Type
river_resource	river resource

Note

The Resource models are under development. Many of the resources are currently integrated into the Converter model directly, notably this is true for the wind resource used in the wind converter and solar resource used in the solar converter.

Converters

Converter models are technologies that:

• converts energy available in the 'Primary Input' to another form of energy ('Primary Commodity') OR

• consumes the 'Primary Input' (and perhaps secondary inputs or feedstocks), which is converted to the 'Primary Commodity' through some process

The inputs, outputs, and corresponding technology that are currently available in H2I are listed below:

Technology name	Primary Commodity	Primary Input(s)
wind	electricity	wind resource
solar	electricity	solar resource
river	electricity	river resource
hopp	electricity	N/A
electrolyzer	hydrogen	electricity
geoh2	hydrogen	???
steel	steel	hydrogen
ammonia	ammonia	nitrogen, hydrogen
doc	co2	electricity
oae	co2	electricity
methanol	methanol	???
air_separator	nitrogen	electricity
desal	water	electricity

Transport

Transport models are used to either:

• connect the 'Transport Commodity' from a technology that produces the 'Transport Commodity' to a technology that consumes or stores the 'Transport Commodity' OR

• combine multiple input streams of the 'Transport Commodity' into a single stream

• split a single input stream of the 'Transport Commodity' into multiple output streams

Technology	Transport Commodity
cable	electricity
pipe	hydrogen
combiner	Any
splitter	electricity

Connection: [source_tech, dest_tech, transport_commodity, transport_technology]

Storage

Storage technologies input and output the 'Storage Commodity' at different times. These technologies can be filled or charged, then unfilled or discharged at some later time. These models are usually constrained by two key model parameters: storage capacity and charge/discharge rate.

Technology	Storage Commodity
h2_storage	hydrogen
battery	electricity
generic_storage	Any

Controller

Controller models are used to control the Storage models and resource flows.

Controller	Control Method
pass_through_controller	open-loop control. directly passes the input resource flow to the output without any modifications
demand_open_loop_controller	open-loop control. manages resource flow based on demand and storage constraints

Technology Models Overview

Below summarizes the available performance, cost, and financial models for each model type. The list of supported models is also available in supported_models.py

• Resource

• Converters

• Transport

• Storage

Resource models

• river:

  • performance models:

    • river_resource

Converter models

• wind: wind turbine

  • performance models:

    • 'wind_plant_performance'

    • 'pysam_wind_plant_performance'

  • cost models:

    • 'wind_plant_cost'

• solar: solar-PV panels

  • performance models:

    • 'pysam_solar_plant_performance'

  • cost models:

    • 'atb_utility_pv_cost'

    • 'atb_comm_res_pv_cost'

• river: hydropower

  • performance models:

    • 'run_of_river_hydro_performance'

  • cost models:

    • 'run_of_river_hydro_cost'

• hopp: hybrid plant

  • combined performance and cost model:

    • 'hopp'

• electrolyzer: hydrogen electrolysis

  • combined performance and cost:

    • 'wombat'

  • performance models:

    • 'pem_electrolyzer_performance'

    • 'eco_pem_electrolyzer_performance'

  • cost models:

    • 'pem_electrolyzer_cost'

    • 'singlitico_electrolyzer_cost'

    • 'basic_electrolyzer_cost'

• geoh2: geologic hydrogen

  • performance models:

    • 'natural_geoh2_performance'

    • 'stimulated_geoh2_performance'

  • cost models:

    • 'natural_geoh2_cost'

    • 'stimulated_geoh2_cost'

  • finance models:

    • 'natural_geoh2'

    • 'stimulated_geoh2'

• steel: steel production

  • performance models:

    • 'steel_performance'

  • combined cost and financial models:

    • 'steel_cost'

• ammonia: ammonia synthesis

  • performance models:

    • 'simple_ammonia_performance'

    • 'synloop_ammonia_performance'

  • cost models:

    • 'simple_ammonia_cost'

    • 'synloop_ammonia_cost'

• doc: direct ocean capture

  • performance models:

    • 'direct_ocean_capture_performance'

  • cost models:

    • 'direct_ocean_capture_cost'

• oae: ocean alkalinity enhancement

  • performance models:

    • 'ocean_alkalinity_enhancement_performance'

  • cost models:

    • 'ocean_alkalinity_enhancement_cost'

  • financial models:

    • 'ocean_alkalinity_enhancement_cost_financial'

• methanol: methanol synthesis

  • performance models:

    • 'smr_methanol_plant_performance'

  • cost models:

    • 'smr_methanol_plant_cost'

  • financial models:

    • 'methanol_plant_financial'

• air_separator: nitrogen separation from air

  • performance models:

    • 'simple_ASU_performance'

  • cost models:

    • 'simple_ASU_cost'

• desal: water desalination

  • performance models:

    • 'reverse_osmosis_desalination_performance'

  • cost models:

    • 'reverse_osmosis_desalination_cost'

Transport Models

• cable

  • performance models:

    • 'cable'

• pipe:

  • performance models:

    • 'pipe'

• combiner:

  • performance models:

    • 'combiner_performance'

Storage Models

• h2_storage: hydrogen storage

  • combined performance and cost

    • 'h2_storage'

  • performance models:

    • 'hydrogen_tank_performance'

  • cost models:

    • 'hydrogen_tank_cost'

• generic_storage: any resource storage

• battery: battery storage

  • cost models:

    • 'atb_battery_cost'

Controller Models

• pass_through_controller

• demand_open_loop_controller