Energy storage module heating test

How to calculate thermal capacity of a test module?

To calculate the theoretical capacity of the test module, the mass of all integrated materials (containment, heat exchanger tubes, fins, end-plates, thermal oil and phase change material) has been determined and the thermal capacity has been calculated from the single masses times their specific heat capacities.

What is sensible and latent heat storage?

There, a three component storage system combining sensible and latent heat storage is advantageous. The heat needed for evaporating the water is stored in the latent heat storage, while the heat for preheating and superheating is stored in sensible concrete storage units. This technology is currently being developed by DLR, Ed.

Can latent heat energy storage systems be used for steam?

The current status of latent heat energy storage systems for steam results mainly from recent research projects at DLR aiming at the development of cost effective concepts intended for process heat applications with a pressure between 1 and 40 bar and for power generation with a pressure range of 20 to 130 bar.

What determines the heat transfer coefficient of a solid PCM?

During the discharge process, the energy released by solidification of the storage material must be transported from the solid-liquid interface through the growing solid layer to the heat exchanger surface (Figure 2). Therefore the heat transfer coefficient is dominated by the thermal conductivity of the solid PCM.

What is the storage capacity of a test module?

The relevant volume of the test module is 0.102 m3; it was calculated by deducing the volume of a head space that was unintentionally not filled from the "outer volume" of the module including the pipes to the flanges but not the pedestal. So the theoretical specific storage capacity is 83.3 kWh/m3.

What is high temperature latent heat storage with high capacity factors?

High temperature latent heat storage with high capacity factors was demonstrated at different temperature levels. The sandwich concept using fins made either from graphite or aluminum was proven as the best option to realize cost-effective latent heat energy storage.