In order to study the efficient utilization model of chemical reaction heat at all levels in natural gas autothermal reforming proton exchange membrane fuel cell(PEMFC)

a generation system with coupling utilization of reaction heat of reforming hydrogen production and fuel cell waste heat is proposed. In this system

the natural gas autothermal reforming technology is applied to produce hydrogen-rich syngas. By using the principle of "suitable temperature and cascade utilization"

the working water is preheated by the chemical reaction heat of the reforming subsystem and the waste heat of the fuel cell's subsystem

to form a regenerative system. The system model of multi-physical field coupling of energy

mass and electrochemical reaction equation is established. The hydrogen production and power generation efficiency of the system are analyzed. The effect of feed temperature

steam-fuel ratio and air-fuel ratio on performance of the system is also studied. The results show that

the power generation efficiency of the system is 47.41%

which is 5.4 percentage points higher than that of the reformer-PEM with the out regeneration heating system. The reasonable feed temperature is 450～500 ℃

the steam-to-fuel ratio is 1.75～2.0 and air-to-fuel ratio is 2.35 ～2.65.