基于低品位余热利用的热化学再吸附发电、制冷及储能特性研究

针对低品位余热转换与储能过程中存在的工作效率较低、热量损失较大等瓶颈问题，本项目提出了一种基于低品位余热利用的热化学再吸附发电、制冷及储能循环，该循环以两种不同反应平衡温度的碱金属卤化物为研究对象，着重分析不同热力学参数条件下的循环性能，揭示了再吸附热功转换与能量存储过程中的相互制约规律，从而实现多种模式下的发电、制冷、供热以及储能协调优化，涵盖了冷热电联供、能量品位提升以及冷热复合储能为一体。研究内容主要包括热化学再吸附发电、制冷及储能循环构建与热力学参数优化匹配、新型碱金属卤化物的研制与吸附反应动力学、再吸附碱金属卤化物复合吸附剂表征与热质耦合强化、变压工况下涡旋式膨胀机的动态性能响应。本项目利用低品位余热与热化学吸附势能之间的相互转换实现热量的高效利用，具有发电效率高、储能密度大、冷热电联供以及长效储存等优点。

To overcome the bottleneck problems of the low working performance and large heat loss in the process of energy conversion and storage, thermochemical resorption cycle for power, cooling and energy storage cogeneration of low grade heat utilization is proposed in this project. Two kinds of metal halides with different equilibrium reaction line are involved in the resorption cycle. Cycle performance of different thermodynamic parameters is analyzed for revealing the restraint law of energy conversion and storage to realize the optimization of multimode power, cooling, heating and energy storage. It covers combined cooling heating and power, integrated energy upgrade and combined heat and cold energy storage. The research contents mainly include cycle establishment and thermodynamic parameters optimization, development of novel metal halides composite adsorbents and adsorption kinetics, heat and mass transfer enhancement and the configuration description of novel metal halides composite adsorbents, dynamic performance response of scroll expander on the pressure swing condition. This project takes advantage of high power generation efficiency, high energy storage density, combined cooling and heating and long-term energy storage based on the conversion between low grade heat and chemical sorption potential for efficient use of heat.