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HOMER Pro 3.9

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Hydrogen Tank Library

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You can view and specify the properties of library hydrogen tanks in the Hydrogen Tank Library under the Components Library. You can create a new hydrogen tank from scratch or by copying an existing one. After copying the hydrogen tank, change the properties as required and give the new hydrogen tank a unique name to distinguish it from the others. HOMER adds the new hydrogen tank to your component library when you click OK. The new hydrogen tank then appears in the list of available hydrogen tank types on the Hydrogen Tank page.

General Properties




A short, distinctive name to identify this hydrogen tank on the schematic and in the results. There is no specific limit on the abbreviation length, but long abbreviated names do not fit well on the schematic or results.


An optional field used to specify the manufacturer of the hydrogen tank.


A unique name used to identify this type of hydrogen tank.


An optional field used to specify manufacturer contact information, prices, or anything noteworthy.


An optional field to hold the website of the manufacturer.


The actual web address of the link defined in the "Website" input.

Other Properties



Absolute tank level (kg)

The initial tank level, if the initial tank level is specified as an absolute value in kg (see "Relative tank level" input below).


Not used.

Capacity (kg)

The maximum amount of hydrogen that the tank can store, in kg.


The duration, in years, before the hydrogen tank is replaced. The replacement cost is incurred at that time.

Relative tank level (%)

The initial tank level, if the initial tank level is specified as a percent of capacity (see "Absolute tank level" input above).

Require year end tank level to equal or exceed initial tank level

If this input is checked, simulations with a lower tank level at the end of the year are infeasible.

Use absolute tank level

Selects absolute or relative tank level to specify the initial tank level. If this box is checked, the absolute tank level input is used to set the initial tank level.

Component requires one minute time steps

If you check this box, users of this component will have to set the simulation time step to one minute to run a calculation. Check this option if the component requires one-minute time steps to model the behavior accurately.


The following inputs define the default value for the cost of the component.



Cost matrix

Click the down arrow on the right end of the row to use the cost matrix editor to input rows to the cost matrix.

Cost multipliers (capital, replacement, O&M)

Sets the default value for the cost multiplier sensitivity variables. In most cases these should all be set to 1.

Physical Dimensions

The following inputs specify the size and weight of the component. If "Weight minimization" mode is selected in the System Control options, the weight parameter is used in the calculation. Otherwise these values are for reference only.




The surface area occupied by the free-standing component, in m2.


The volume in m3.


The total weight of the component in kg. Optionally this can include all associated equipment for transportation and deployment of the component, for weight minimization mode.

See also

Hydrogen Tank

Component Library