An intelligent solar phase-change collector
LIU Feng
DING Jinhong
LI Guanxin
Abstract：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.
Keywords：solar energythermal storage densityphase-change materialintegrated design
Publication Date：2025-09-25
Online Publishing Date：2025-11-10(First online date of this platform, not the publication date of the document)
Pages：4( 68-71 )