In previous sections, we focused on large-scale heat storage devices. However, there is a whole variety of small scale heat storage devices. For example, residential roof-mounted solar water heaters are popular in many countries with high sunlight.
We will not discuss in detail the existing methods of small and intermediate scale thermal energy storage, but a good review of such technologies can be found in an article by Ioan Sarbu and C. Sebarchievici available at a research- gate.net Web page. After clicking on the link, one will see only the abstract but in the upper right corner of the screen there is an icon “Download full-text PDF”, after clicking on which the whole text will appear on the screen.