Peak-valley electric heating energy storage device

Can thermal energy storage reduce peak-valley difference of energy consumption?

Introduction Thermal energy storage techniques have become a promising way to minimize the peak-valley difference of energy consumption. Latent thermal energy storage (LTES) is a major aspect of thermal energy storage due to its high thermal storage density, and it can maintain a constant temperature in the process of heat release .

Does the optimized device improve the heat storage performance?

Compared with the original device, the heat energy charged of the optimized device increases by 5.7% and the filling amount of PCM decreases by 7.4%, indicating that the heat storage performance of the optimized device has been improved.

How can a phase change heat storage device be evaluated?

For a phase change heat storage device, the melting-solidification processing can be evaluated by the melt fraction β quantity. The larger the value of melt fraction β at the end of the simulated heat charging process, the more PCM has melted and the more heat energy is stored, revealing a better heat transfer effect. 3.1.2.

What is latent thermal energy storage (LTEs)?

Latent thermal energy storage (LTES) is a major aspect of thermal energy storage due to its high thermal storage density, and it can maintain a constant temperature in the process of heat release . Therefore, phase change materials have received an increasing level of attention and have been widely applied to various heating systems.

What is a phase change heat storage device (PCM)?

In the studies of Li et al. , , PCM was filled in cylindrical tubes and all tubes were immersed in HTF of the storage tank. The structure forms of phase change heat storage devices can be broadly divided into two categories: shell and tube structure as well as encapsulated PCM structure, but the former is more common.

Which module has a larger heat energy discharged-charged ratio?

As can be seen in Fig. 7, whether focusing on the comparison of a single day or the comparison of the mean value, module 2 has a larger heat energy discharged-charged ratio. This result was also affected by the connection mode between modules.