Abstract
Process intensification (PI) technologies represent all approaches leading to size reduction and efficiency improvement of process equipment. Thermal Energy Storage (TES) systems are key elements in renewable and recovery thermal energy deployments and their performance can benefit from PI principles. This study covers a brief analysis and state of the art of several PI technologies applied to TES systems. All sensible, latent and thermochemical storage systems are covered. Two surface-to-volume ratios closely related to component size and system performance are first analysed. They theoretically show how PI principles may inspire the performance enhancement of TES systems. Then, a brief synthesis on successful PI applications in sensible, latent and thermochemical storages is given. Their approaches mainly consist of thermal stratification preservation, modular design, heat and mass transfer enhancement as well as material properties modification. Finally, potential TES system improvement directions based on PI principles are recommended.
Highlights
Waste energy recovery and renewable energy development in the building sector reduce fossil energy dependence and its environmental impact
We introduce various principles of process intensification (PI), extensively used in the field process engineering, to the function improvement of sensible, latent, and thermochemical Thermal energy storage (TES) systems
The most known TES system is perhaps hot water tanks sizing around a 100 L, generally installed in individual homes
Summary
This study covers a brief analysis and state of the art of several PI technologies applied to TES systems. Latent, and thermochemical storage systems are covered. Two surface-to-volume ratios closely related to component size and system performance are first analyzed. They theoretically show how PI principles may inspire the performance enhancement of TES systems. A brief synthesis on successful PI applications in sensible, latent, and thermochemical storages is given. Their approaches mainly consist of thermal stratification preservation, modular design, heat and mass transfer enhancement, as well as material properties modification.
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