摘要
针对传统太阳能集热系统存在的间歇性供能、储热密度低及依赖水箱等技术问题,提出一种基于复合相变材料与真空集热管耦合的智能型集热器,旨在实现高密度储热与全天候稳定供热。通过集成双级相变材料(PCM1/PCM2),构建阶梯式储热单元,形成无水箱一体化结构;结合预判未来24 h辐照强度与温度变化,动态调控相变材料储热进程,并利用谷电时段辅助储能。结果表明,集热器单次储热量达12.50 MJ,放热能力为9.45 MJ,日平均热效率75.6%;通过谷电储热补偿阴雨天热能缺口,可实现连续稳定供热(出水温度≥40℃)。该一体化设计通过双级相变材料协同作用与智能调控策略,突破了太阳能时空不连续的限制,其高储热密度与低运行成本特性为清洁能源利用提供了方案。
Aiming at the technical problems existing in traditional solar thermal collection systems,such as intermittent energy supply,low heat storage density and reliance on water tanks,an intelligent collector based on the coupling of composite phase-change materials and vacuum heat collection tubes is proposed,aiming to achieve high-density heat storage and stable heating throughout the day.By integrating two-stage phase-change materials(PCM1/PCM2),a stepped heat storage unit is constructed to form a tankless integrated structure.By predicting the changes in irradiance and temperature over the next 24 h,the heat storage process of phase-change materials is dynamically regulated,and the off-peak electricity period is utilized to assist in energy storage.The results show that the single heat storage capacity of the collector reaches 12.50 MJ,the heat release capacity is 9.45 MJ,and the average daily thermal efficiency is 75.6%.By compensating for the heat shortage on rainy days through off-peak electricity storage,continuous and stable heating can be achieved(outlet water temperature≥40℃).This integrated design,through the synergistic effect of two-stage phase-change materials and intelligent regulation strategies,breaks through the spatio-temporal discontinuity limitations of solar energy.Its high heat storage density and low operating cost characteristics provide a solution for the utilization of clean energy.
作者
刘锋
丁锦宏
李冠新
LIU Feng;DING Jinhong;LI Guanxin
出处
《节能》
2025年第9期68-71,共4页
Energy Conservation
基金
广东省热泵产业协会科技项目(项目编号:RBKY2024011)。
关键词
太阳能
储热密度
相变材料
一体化
solar energy
thermal storage density
phase-change material
integrated design
