Energy storage instead of heat exchanger

How effective is a heat exchanger?

As mentioned in Section 2.5, the effectiveness of heat exchanger is usually regarded as an ideal value in previous studies, that is, it is set to be equal in energy storage and energy release phases and is not affected by other parameters.

Can compact heat exchanger design overcome PCM thermal conductivity limitations?

Results show that reducing the PCM-encasement thickness yields substantially better performance than by improving the thermal conductivity, thereby demonstrating the potential for compact heat exchanger design to overcome the PCM thermal conductivity limitations. 1. Sol. Energy Mater.

What are the different types of thermal energy storage systems?

Thermal energy storage (TES) systems can store heat or cold to be used later, at different conditions such as temperature, place, or power. TES systems are divided in three types: sensible heat, latent heat, and sorption and chemical energy storage (also known as thermochemical).

What are the benefits of thermal energy storage?

Potential and Barriers – The storage of thermal energy (typically from renewable energy sources, waste heat or surplus energy production) can replace heat and cold production from fossil fuels, reduce CO 2 emissions and lower the need for costly peak power and heat production capacity.

Why is thermal energy storage more difficult than electricity storage?

Compared with electricity storage, the technology of TES is more difficult, because the thermal energy quality is lower than electric energy, and it is difficult to store, and the stored heat energy is not easy to use and the loss is large.

How does pressure affect heat exchanger performance?

The pressure loss in the effectiveness of heat exchanger also affects heat exchanger performance. In addition, due to changes in the pressure in compressed air storage during energy storage and release process and changes in operating conditions, the air mass flow also changes, which also leads to changes in the effectiveness of heat exchanger.