While determining the optimal conditions, GA tends to replace fossil fuel-based heating with low-carbon electricity generated from sources deploying carbon capture and storage. However, we anticipate that there might exist several techno-economic limitations towards a complete substitution of heating by decarbonized electricity sources. Hence, we performed a set of scenario analyses for the heating substitution regarding the upper bound for substituting heating utility is set as 0, 25%, 50%, 100%. The optimization is performed respectively for them (optimization progresses can be referred to Figure and optimal operating condition in Table ). After optimization, the GHG emissions can be reduced, ranging from 13% to 47%, while all the substitution percentages to low-carbon electricity tend to approach the upper bounds (Table ). Figure shows the breakdowns of sources for GHG emissions in the industrial park. The largest source is heating, followed by NG, CO2 emissions via vent gas and electricity, etc.