Multiple Energy Utilization Synergy Mechanism And Pathways For Promoting The Development Of Renewable Energy

In response to climate change,China has set the target to achieve carbon neutrality by 2060.Synergistic utilization of energy and large-scale development of renewable energy are crucial for achieving this target.To what extent will the transition pathways of energy synergistic utilization affect the development of renewable energy? Will it improve the economic and environmental benefits of the energy system? Therefore,this paper conducts a case study of Beijing,China,and designs sixteem transition pathways affecting renewable energy utilization using the "Avoid-Shift-Improve（A-S-I）" pathway setting theory,including only considering the heating sector decarbonization transition pathways,only considering the transport sector electrification transition pathways,and multi-sector synergistic transition pathways.In the heating sector,three transition strategies are considered including,the energy conservation,the technology substitution and the technical efficiency improvement.At the same time,the change of travel mode,the substitution of electric vehicles and the efficiency improvement strategies are considered in the transport sector.Using the Energy PLAN model,the hourly operation of Beijing’s power,heating and transport sectors under the business-as-usual and the transition pathways are simulated.In addition,based on the results of the Energy PLAN model,an energy system optimization model is constructed to solve the endogenous optimization of renewable energy technology installed capacity.The main findings of this study are as follows: firstly,the transition pathway of incorporating renewable energy into cogeneration technology can realize the complete substitution of renewable energy for fossil fuel and eliminate CO₂ emissions from the power and heating sectors at the root in the heating sector decarbonization transition pathways.The transition pathway of electric heating pump replacing fossil fuel technology has the lowest primary energy consumption.In the transition pathways where fossil fuel technology is being replaced,the significant increase in investment costs generated by infrastructure construction has led to an increase in the total energy system cost.Secondly,in the transport sector electrification transition pathways,the two transition pathways of new energy vehicles replacing traditional fuel vehicles can not only achieve complete substitution of renewable energy for fossil fuel in the transport sector but significantly improve the energy conservation effect of the power and transport sectors and improve the economy of the energy system by reducing the variable operation and maintenance costs caused by fossil energy consumption,resulting in a total cost reduction of 12.01% and 12.81% in the energy system.Thirdly,the synergistic transition pathways between renewable energy generation,heating,and transport sectors can achieve complete substitution of renewable energy for fossil energy,which has energysaving,emission reduction,and cost saving effects compared to the transition pathways of the power and heating sectors.Compared with the synergistic transition pathways of the power and transport sectors,it has energy-saving and emission reduction effects,but it will increase the total cost of the energy system.Finally,in the multi-sector synergistic transition pathways,the two endogenous pathways of renewable energy installed capacity can reduce 5.79% and 6.88% of primary energy consumption,as well as reduce 0.83%and 1.36% of the total energy system cost on the premise of large-scale reduction of renewable energy installed capacity.The research method of this paper can be extended to formulate decarbonization transition schemes in the regional integrated energy systems.