Comprehensive energy supply system with hydrogen production and prediction function and integrated with hydrogen energy storage by residual flue gas of gas engine

A comprehensive energy supply system based on a hydrogen energy storage system using residual flue gas of a gas engine, comprising the gas engine, a reforming hydrogen production device, and a lithium bromide absorption cold and hot water unit, wherein

• an input end of the lithium bromide absorption cold and hot water unit is connected with a high-temperature flue gas channel of the gas engine, and an output end of the lithium bromide absorption cold and hot water unit is connected with a cold and hot water pipeline for air conditioning in a building;
• the reforming hydrogen production device comprises an exhaust gas waste heat boiler, a hydrogenation reaction combustion furnace, and a medium temperature shift converter, a first input end of the exhaust gas waste heat boiler is connected with the high-temperature flue gas channel of the gas engine, and a second input end of the exhaust gas waste heat boiler is connected with a flue gas channel of the hydrogenation reaction combustion furnace, the medium temperature shift converter is connected at a rear end of the hydrogenation reaction combustion furnace, and a terminal hydrogen output end of the reforming hydrogen production device is connected with a hydrogen fuel cell;
• a total amount of discharged flue gas by the gas engine per unit time is calculated, and a first amount of flue gas required by the lithium bromide absorption cold and hot water unit per unit time is calculated;
• when the total amount of discharged flue gas by the gas engine is less than or equal to the first amount of flue gas required by the lithium bromide absorption cold and hot water unit, all of flue gas is introduced into the lithium bromide absorption cold and hot water unit;
• when the total amount of discharged flue gas by the gas engine is larger than the first amount of flue gas required by the lithium bromide absorption cold and hot water unit, the amount of flue gas required by the lithium bromide absorption cold and hot water unit is sufficiently introduced into the lithium bromide absorption cold and hot water unit, and remaining flue gas is introduced into the exhaust gas waste heat boiler for generating steam;
• a second amount of flue gas discharged from the hydrogenation reaction combustion furnace and entering the exhaust gas waste heat boiler is determined according to an operation state of the hydrogenation reaction combustion furnace;
• and a total amount of intake flue gas into the exhaust gas waste heat boiler is calculated according to the total amount of discharged flue gas, the first amount of flue gas, and the second amount of flue gas;
• and
• a mass flow of generated steam is calculated according to the total amount of intake flue gas, a required amount of natural gas raw material is calculated according to a mass flow of steam and a total carbon flow in the natural gas, and natural gas is introduced into the hydrogenation reaction combustion furnace according to the amount of natural gas raw material.