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PEM Fuel Cell Power Plant

Screening-stage model for a stationary containerized PEM fuel cell system to estimate hydrogen consumption, CAPEX/OPEX breakdown, and LCOE with an optional PSA purification package.

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alexi

I do low-carbon energy stuff for 10 years & build things I wish existed.

Inputs

Set to 'Yes' if a PSA purification subsystem is included upstream of the fuel cell to condition hydrogen.

Net AC export rating of the containerized PEM fuel cell system.

min 0.1 · max 100 · step 0.1 · MW

Specific hydrogen consumption

Hydrogen per net electricity output

…kg/MWh

Balance

Annual hydrogen consumption

H2 demand adjusted for optional PSA recovery loss

…kg/year

Average utilization over the year as a percent of nominal power (net).

min 0 · max 100 · step 1 · %

Annual net electricity

Net export electricity based on nominal power and capacity factor

…MWh/year

Results

Equipment purchase cost (EPC excl.)

Major equipment only: fuel cell system + optional PSA package

…EUR

Installed plant cost (CAPEX total)

Equipment cost plus installation-related costs (no owner’s cost)

…EUR

Annualized replacement cost

Fuel cell stack replacement + PSA adsorbent replacement (if enabled)

…EUR/year

Fixed O&M cost

Annual fixed O&M proportional to installed CAPEX (scaled and clamped)

…EUR/year

Annual hydrogen fuel cost

Variable fuel OPEX from hydrogen consumption and hydrogen price

…EUR/year
New chart

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LCOE

Real or nominal must be consistent with cost basis; used for CRF.

ratio

Amortization period for CAPEX annualization via CRF.

years

LCOE (excluding hydrogen fuel)

Shows non-fuel cost of power (CAPEX + non-fuel OPEX)

…EUR/MWh

LCOE (incl. hydrogen fuel)

Total annual cost divided by annual electricity output

…EUR/MWh

All-in delivered hydrogen price to the container (including logistics), used to compute fuel cost and LCOE.

min 0 · max 30 · step 0.1 · EUR/kg

About

Calculator context

Introduction

This calculator estimates hydrogen consumption and levelized cost of electricity (LCOE) for a containerized stationary PEM fuel cell power system, with an optional PSA purification sub-system. It is intended for screening-stage development decisions using public benchmark ranges (IEA/IRENA/NREL/DOE) and a transparent cost-and-energy balance approach suitable for early feasibility. The scope is global (defaults reflect widely cited international datasets).

Methodology

The model converts nominal net electrical power and capacity factor into annual electricity output, then computes hydrogen demand from fuel cell net electrical efficiency and hydrogen LHV. Costs are built bottom-up at a major-subsystem level (fuel cell system + optional PSA), scaled with a power-law and annualized with a capital recovery factor.

Key equations (variables shown with units):

  • Annual electricity:
    • Capacity factor fraction = capacity_factor_pct * 0.01
    • Annual electricity (MWh/yr) = nominal_power_mw * hours_per_year * capacity_factor_fraction
  • Hydrogen consumption (LHV basis):
    • Base H2 (kg/yr) = annual_electricity_kwh / (net_efficiency * hydrogen_LHV_kwh_per_kg)
    • If PSA is included, adjust for recovery: annual_h2_kg = base_h2_kg / h2_recovery
  • CAPEX scaling (power-law with clamp):
    • specific_capex_scaled = clamp(capex_ref * (P/P_ref)^capex_scale_exponent, capex_min, capex_max)
    • Equipment purchase cost = specific_capex_scaled * power_kw (+ PSA adder if enabled)
    • Installed plant cost = equipment_cost_total * installed_multiplier
  • OPEX breakdown:
    • Fixed O&M (EUR/yr) = capex_total * om_fraction_scaled (also power-law clamped)
    • Variable O&M (EUR/yr) = variable_om_eur_per_mwh * annual_electricity_mwh
    • Stack replacement annualization based on operating hours (typical fuel-cell practice; see DOE/NREL cost models)
    • PSA adsorbent replacement annualized on a fixed interval
  • Finance (CRF) (standard project finance; e.g., NREL System Advisor Model conventions):
    • CRF = (r*(1+r)^n)/((1+r)^n-1)
    • annualized_capex = capex_total * CRF
  • LCOE:
    • LCOE (EUR/MWh) = total_annual_cost / annual_electricity_mwh

Applications

  • Project developer (screening): compare LCOE sensitivity to capacity factor, hydrogen price, and PSA inclusion for early go/no-go.
  • Commercial team: translate a delivered hydrogen price (EUR/kg) into expected power cost (EUR/MWh) for term-sheet discussions.
  • Engineering pre-FEED: sanity-check hydrogen logistics (kg/yr, kg/MWh) and replacement-driven OPEX exposure before detailed vendor quotes.

Model

71 variables — inputs, calculations and outputs, with their dependencies.

71 variables shown of 71
VariableValueUnitDepends on
5MW—
85%—
0——
6EUR/kg—
0.08ratio—
20years—
VariableFormulaUnitDepends on
if((if(<=,,)+if(<,,)+if(>,,)+if(<,,)+if(>,,)+if(<=,,)+if(<,,)+if(==,,if(==,,)))>,,)bool
*—
*kW
*h/year
*kWh/year
if(==,,)—
—
/max((*),)kg/year
/max(,)—
*(^)EUR/kW
clamp(,,)EUR/kW
*EUR
**EUR
*EUR
(*(1+)^)/max(((1+)^-1),)—
*EUR/year
*(^)—
clamp(,,)—
*EUR/year
**EUR
/max(,)years
if(>,/max(,),)EUR/year
*EUR
if(==,/max(,),)EUR/year
+++EUR/year
+++EUR/year
VariableFormulaUnitDepends on
**MWh/year
/max(,)kg/year
/max(,)kg/MWh
+EUR
EUR
*EUR/year
+EUR/year
*EUR/year
+EUR/year
/max(,)EUR/MWh
/max(,)EUR/MWh

Assumptions

28 assumptions used in the calculations

  • Division guard to prevent undefined behavior when denominators approach zero.

    Market range Not applicable (numerical stability parameter)

    0.000001
    Modeling constant

  • Used to avoid inline numeric literals in expressions.

    Market range Not applicable

    0
    Arithmetic constant

  • Used for boolean-style comparisons and toggles without inline literals.

    Market range Not applicable

    1
    Arithmetic constant

  • Percent scaling and validation bound without inline literals.

    Market range Not applicable

    100
    Arithmetic constant

  • Converts percent inputs (0–100) to fractions (0–1).

    Market range Not applicable

    0.01fraction/%
    Unit conversion

  • Average hours per (non-leap) year for annual energy calculations.

    Market range 8760 (standard), 8784 (leap year)

    8760h/year
    Time conversion

  • Power unit conversion used for CAPEX per kW scaling.

    Market range Not applicable

    1000kW/MW
    Unit conversion

  • Energy unit conversion for hydrogen consumption calculations.

    Market range Not applicable

    1000kWh/MWh
    Unit conversion

  • Hydrogen lower heating value used for LHV-basis efficiency and consumption.

    33.33kWh/kg
    Thermochemical property

  • Representative net electrical efficiency for stationary PEM fuel cell systems at/near rated conditions on an LHV basis.

    0.5ratio
    Technology benchmark

  • Represents hydrogen loss through PSA purification (less than 100% recovery), increasing upstream H2 requirement.

    0.9ratio
    Process benchmark

  • Reference power for CAPEX/O&M scaling curves (1 MW reference).

    1000kW
    Model reference point

  • Economy-of-scale exponent for specific CAPEX vs power (weak scaling typical for modular containerized systems).

    Market range -0.05 to 0.25 depending on modularity and balance-of-plant share

    0.12
    Cost scaling heuristic

  • Screening reference equipment CAPEX for containerized stationary PEM fuel cell systems (equipment purchase cost only).

    1200EUR/kW
    Technology benchmark

  • Prevents implausibly low specific CAPEX when scaling to large sizes.

    600EUR/kW
    Model clamp bound

  • Prevents implausibly high specific CAPEX when scaling to very small systems.

    2500EUR/kW
    Model clamp bound

  • Approximate incremental equipment CAPEX to include a PSA purification package sized to the fuel cell power block (screening proxy).

    150EUR/kW
    Subsystem adder assumption

  • Converts equipment purchase cost to installed plant cost including installation, integration, and indirects (excludes owner’s costs).

    1.35x
    Installation factor

  • Reference fixed O&M fraction of installed CAPEX for stationary fuel cell systems.

    0.04ratio
    O&M benchmark

  • Captures mild economies of scale for O&M fraction with increasing system size.

    Market range -0.15 to 0.00

    -0.05
    Scaling heuristic

  • Lower bound on fixed O&M fraction for screening robustness.

    0.02ratio
    Model clamp bound

  • Upper bound on fixed O&M fraction for screening robustness.

    0.08ratio
    Model clamp bound

  • Represents variable operating costs excluding hydrogen fuel (consumables, minor maintenance per output).

    2EUR/MWh
    O&M benchmark

  • Approximate fraction of fuel cell equipment cost attributable to stack(s), used to estimate replacement event cost.

    0.35ratio
    Cost structure heuristic

  • Multiplier to represent replacement event cost relative to stack cost share (includes labor/overheads implicitly).

    1x
    Replacement costing assumption

  • Representative stack life before replacement for stationary PEM fuel cell operation (order-of-magnitude).

    70000h
    Technology benchmark

  • Fraction of PSA package equipment cost attributable to replaceable adsorbent/media used to estimate replacement event cost.

    0.15ratio
    Subsystem replacement heuristic

  • Typical planning interval for PSA adsorbent/media replacement under continuous operation (order-of-magnitude).

    7years
    Maintenance benchmark