An iterative method for designing hydrogen networks with purification units is presented.First

the purified source flow rate is assumed to be large enough

regarding the purified source as a new source.And then

the initial hydrogen network with purification units is constituted.By using the source matching method

the hydrogen network is designed

the purified source amount Freg that can be used and the purified source amount Fregtotal from purifying all internal sources that have not been reused are obtained.When Fregtotal<Freg

Fregtotal is regarded as the initial value of the purified source in the next iteration

and the final design is obtained by only a few iterations.When Fregtotal≥Freg

Freg is used as the value of the purified source of the final design

and the internal source with the lowest impurity concentration that has not been reused for purification is selected.In the latter case

the final design is obtained without further iterations.By examining some examples reported in literatures

it is found that the method are simple and effective

moreover

not only the hydrogen consumption target value but also the specific design of hydrogen network can be obtained by using this method.