关键词: 大温升, 高温热泵, 储能系统, 策略优化

Abstract: Under the call of the carbon peaking and carbon neutrality goals, the industrial steam production process urgently requires reduction of CO2 emissions from fossil fuel combustion. As a highly promising low-carbon energy conversion system, high-temperature heat pumps not only efficiently produce high-temperature steam but also significantly reduce energy consumption and carbon emissions. To address the challenge of single-stage high-temperature heat pumps' inability to achieve large temperature lifts, this study proposes an efficient energy solution integrating high-temperature heat pumps with energy storage systems. This system leverages the characteristics of energy storage to reduce compressor pressure ratios, enabling efficient steam production under extreme operating conditions. A comprehensive variable operating condition regulation model incorporating energy, exergy, economic, and environmental benefits was established, and the application potential of the energy storage-integrated system was evaluated through comparison with conventional large temperature-lift heat pumps. Furthermore, an optimal strategy model for the integrated system was developed. Results demonstrate that under operating conditions where single-stage heat pumps become ineffective, the energy storage-coupled system maintains stable industrial steam output with at least 134.3% COP improvement and minimum 461.5% steam production enhancement. An optimal operational strategy exists for the energy storage system, where only through rational configuration under variable operating conditions can simultaneous improvement of system performance and economic efficiency be achieved.

Key words: Large temperature lift, high-temperature heat pump, thermal energy storage, strategy optimization