As a novel advanced energy supply system that integrates power supply

heat supply

and renewable energy consumption

the electricity-hydrogen fuel cell combined heat and power(CHP) system has broad prospects for realizing China's “dual carbon” strategic goal and promoting the green low-carbon transition of the energy industry. At present

the economic feasibility of CHP systems involving gas-solid coupled hydrogen storage technology remains unclear

and systematic quantitative evaluation is still lacking. Therefore

this paper establishes a scientific and targeted economic model to comprehensively evaluate the levelized cost of electricity of such a system and conduct in-depth analysis of its key influencing factors. This paper develops a levelized cost of hydrogen fuel cell electricity(LCOHFCE) economic evaluation model for the CHP system that includes fuel cells

electrolyzers

gas-solid coupled hydrogen storage systems

and other related auxiliary equipment. By systematically evaluating various key economic parameters of the system throughout its entire life cycle

such as initial investment cost

operation and maintenance cost

and related taxes and fees

the authors accurately evaluate the power generation cost using the LCOHFCE indicator

and discuss the influencing mechanisms and degrees of various factors on this indicator in detail. The calculation and analysis results show that the LCOHFCE value of the studied CHP system is 0.186 yuan per kW·h

among them

the regeneration cost of hydrogen storage materials accounts for the highest proportion of the total operation and maintenance cost

reaching 57.41%

which is the core cost component affecting the operation and maintenance cost of the system. In addition

the sensitivity analysis results indicate that for every 5% increase in the recovery rate of hydrogen storage materials

the LCOHFCE indicator decreases by 22.04%～26.88%. When the price of hydrogen storage materials increases by 10 yuan per kg

the LCOHFCE indicator rises by 1.61%～5.91%. Compared with material price

LCOHFCE is significantly more sensitive to recovery rate

and at the same time

the service life of key equipment also exerts significant impact on the LCOHFCE indicator. For the gas-solid coupled hydrogen storage CHP system studied in this paper

the recovery rate of hydrogen storage materials is the most sensitive factor affecting the power generation cost. Reasonably formulating and arranging the equipment overhaul or replacement strategy can further improve the economic performance and market competitiveness of the system. Under the background of China's “dual carbon” strategy

this system has good application potential.