Heat integration method and system for dynamic hydrogen production process

Abstract

The invention provides a heat integration method for a dynamic hydrogen production process, and the method comprises the steps: acquiring the current power load of an electrolytic bath, and judging the load conversion direction of the electrolytic bath; or comparing the current power of the electrolytic bath with the rated power to obtain the current thermal state of the electrolytic bath, and then obtaining the current heat transfer requirement of the electric heating bath; judging whether the current heat exchange mode of the heat exchange unit meets the limitation of the heat transfer requirement of the current electric heating groove or not; acquiring the current temperature of the electrolytic cell and comparing the current temperature with a set value: if the current temperature is lower than the set value, decreasing the flow speed of the heat exchange medium; if the current temperature is equal to the set value, keeping the flow speed of the heat exchange medium unchanged; if the current temperature is higher than the set value, increasing the flow rate of the heat exchange medium; and utilizing the waste heat of the heat exchange medium passing through the heat exchange unit. The working efficiency of the electrolytic cell is improved, and further utilization of heat is achieved. The invention further provides a heat integration system for the dynamic hydrogen production process.

Description

technical field [0001] The invention relates to the technical fields of renewable energy and hydrogen energy, in particular to a heat integration method and system for a dynamic hydrogen production process. Background technique [0002] With the increasing proportion of renewable energy such as wind power and photovoltaic in my country's energy supply, the impact of the volatility of renewable energy on the power grid has become an urgent problem to be solved. Using renewable energy to electrolyze water to produce green hydrogen and storing hydrogen is an effective means to realize large-scale renewable energy storage and relieve the pressure on the power grid. Electrolytic hydrogen production technology often works under stable power in traditional application scenarios, but for the unstable power input of fluctuating renewable energy, its system management has encountered many problems, and heat management is one of the more critical ones. [0003] Heat management has a g...

AI Technical Summary

Problems solved by technology

Under the conditions of fluctuating renewable energy and dynamic electrolytic hydrogen production, the change of electrolyzer load is accompanied by frequent changes of heat production. The current thermal management system of electrolyzer lacks sufficient dynamic response capability, and there are few temperature detection points. The temperature control of the internal reaction is not precise enough, and the overall thermal efficiency and waste heat utilization efficiency are not high

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