In Equation , CRF is the capital recovery factor; C T M is the overnight capital cost as calculated from Equation ; O&M f ixed is the yearly fixed Operations and Maintenance cost invariant of the plant load/capacity and O&M variable is the yearly Operations and Maintenance cost that scales with plant load cf. 4. The denominator in Equation is the yearly amount of produced methanol, which we set as the nominal mass flow (kg/s) integrated over the year, assuming 8,000 hours at the design rate. The variable O&M costs will, for simplicity, be set at the cost of reactants, cost of electricity to power compressor, cost of cooling and cost of heating, respectively.