German household solar thermal storage materials

What are the components of a solar thermal energy storage system?

The performances of solar thermal energy storage systems A TES system consists of three parts: storage medium, heat exchanger and storage tank. Storage medium can be sensible, latent heat or thermochemical storage material . The purpose of the heat exchanger is to supply or extract heat from the storage medium.

Which materials are used in thermal energy storage?

In high temperature side, inorganic materials like nitrate salts are the most used thermal energy storage materials, while on the lower and medium side organic materials like commercial paraffin are most used. Improving thermal conductivity of thermal energy storage materials is a major focus area.

What is a sensible heat thermal energy storage material?

Sensible heat thermal energy storage materials store heat energy in their specific heat capacity (C p). The thermal energy stored by sensible heat can be expressed as Q = m ⋅ C p ⋅ Δ T, where m is the mass (kg), C p is the specific heat capacity (kJ kg −1 K −1) and Δ T is the raise in temperature during charging process.

What are the properties of solar thermal energy storage materials?

2. The properties of solar thermal energy storage materials Applications like house space heating require low temperature TES below 50 °C, while applications like electrical power generation require high temperature TES systems above 175 °C .

How much does thermal energy storage cost?

They estimated that resulting unit cost of energy stored is $4.50/kW h and $0.88/kW h for molten salt and concrete respectively. They concluded that significant reduction in thermal energy storage cost can be derived from the use of concrete as a storage medium. 3.2. Latent heat storage systems

How much does solar heat cost in Germany?

The solar heat costs that have been reached today by CSHPSS-systems in Germany are, depending on the size of the system, between 16 and 42 EuroCt/kWh. In Germany, this is still more than 3 times higher than heat supply from fossil fuels.