Abstract
In recent years, thermal energy storage by means of phase change materials (PCMs) achieved considerable attention.This paper presented a new heat exchanger of composite shape-stabilize phase change material PEG/EG/SiO2. This heat exchanger can be applied to solar energy low temperature storage or indoor heating, which could make good use of electric power cost between peak and valley. The effect of inlet velocity and inlet temperatures in the heat ex-changer during a charging and discharging process has been simulated by CFD modelling. According contrast and analysis of the result, it is found that increasing inlet velocity and in-let temperature of working fluid can shorten the heat storage time. Exothermic process is consists of sensible heat release progress and latent heat release progress, of which time ac-counted for 8.9% and 91.1% respectively. The research provides a new idea for the development of phase change heat exchanger.
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