The increase of climate disasters and air pollution has caused an urgent need for the clean and low carbon energy transition. In this background, polygeneration represents an innovative and promising concept. The purpose of this study is to provide a generic modelling and optimization strategy to evaluate the polygeneration systems in urban areas. A biomass polygeneration integrated energy system, providing electricity, heating and cooling as well as chemical product, is proposed and evaluated in this work. The feasibility of biomass polygeneration integrated energy system in different regions is also investigated by case study. A mixed-integer nonlinear programming approach has been formulated in General Algebraic Modeling System to address the following issues: a) selection of technologies, types and numbers of equipment to match the energy demand of end users; b) strategic planning and process designing from both economic and environmental perspectives; c) representation of the relationships and trade-offs between the trigeneration and chemical conversion steps; d) operation strategies for biomass polygeneration integrated energy system with time dependent process and boundary conditions. Moreover, the proposed biomass polygeneration integrated energy system is compared to the conventional natural gas-based combined cooling heating and power system as the reference.

气候灾害和空气污染的增加已引起对清洁和低碳能源过渡的迫切需求。在这种背景下，多代发电代表着创新和有前途的概念。这项研究的目的是提供一种通用的建模和优化策略，以评估城市地区的多联产系统。这项工作提出并评估了一种生物质多联产综合能源系统，该系统可以提供电力，供暖和制冷以及化学产品。通过案例研究，研究了生物质多联产综合能源系统在不同地区的可行性。通用代数建模系统中已经提出了一种混合整数非线性规划方法，以解决以下问题：a）技术选择，符合终端用户能源需求的设备类型和数量；b）从经济和环境的角度进行战略规划和过程设计；c）表示三代和化学转化步骤之间的关系和权衡；d）具有时间依赖性过程和边界条件的生物质多联产综合能源系统的运行策略。此外，将拟议的生物质多联产综合能源系统与传统的基于天然气的联合冷却供热和发电系统进行了比较。d）具有时间依赖性过程和边界条件的生物质多联产综合能源系统的运行策略。此外，将拟议的生物质多联产综合能源系统与传统的基于天然气的联合冷却供热和发电系统进行了比较。d）具有时间依赖性过程和边界条件的生物质多联产综合能源系统的运行策略。此外，将拟议的生物质多联产综合能源系统与常规的基于天然气的联合冷却供热系统进行了比较。