Construction and optimization analysis of multi-energy coordinated energy supply system for zero-carbon buildings in severe cold zone

Driven by the “carbon peaking and carbon neutrality” goals, the application of renewable energy in building energy supply systems is becoming increasingly widespread. However, there are issues such as insufficient stability and mismatch between supply and demand. To address these problems, this paper takes a zero-carbon building in Shenyang as an example and uses TRNSYS software to construct a wind-solar hybrid and heat pump multi-energy coordinated energy supply system to explore the system’s energy consumption and performance. On the GenOpt optimization platform, with the goals of power supply system coverage rate, carbon emission reduction, and levelized cost of energy, single-criterion optimization is conducted on the wind-solar hybrid and heat pump multi-energy coordinated energy supply system to discuss the energy, environment, and economic benefits. The technical feasibility of photovoltaic and wind power systems in severe cold zone is clarified. Through optimization of the wind-solar hybrid and heat pump multi-energy coordinated energy supply system, the power supply system coverage rate is increased by 22.9%, the maximum carbon emission reduction reaches 13 190 kg, and the lowest levelized cost of energy is 0.37 yuan/kWh, providing a basis for equipment selection in zero-carbon buildings in severe cold zone.