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WHAT IS THERMAL ENERGY STORAGE (TES)?

Frequently asked questions about Thermal Energy Storage (TES)

1. What is Thermal Energy Storage (TES)?

Thermal Energy Storage (TES) is the temporary storage of high or low temperature energy for later use. It bridges the gap between energy requirement and energy use. A thermal storage application may involve a 24 hour or alternatively a weekly or even a seasonal storage cycle depending on the system design requirements. While the output is always thermal, the input energy may be either thermal or electrical.


2. How many types of TES techniques?

Generally speaking, there are two types of TES techniques:


Sensible Heat TES Techniques

This technique uses chilled/hot water as storage medium. 

Latent Heat TES Techniques

These techniques use either ice or phase change material as storage media.



3. Some examples on Sensible TES?


Sensible Heat C Water TES

4. Some examples on Latent TES?


Latent Heat C Ice TES





Latent Heat - PCM TES




5What are the advantages and disadvantages of organic versus inorganic (salt-based) PCM?

Please refer to table below for a summary:


6. What are the benefits of TES?

Thermal Energy Storage not only provides the end user with an environmentally friendly design but also the following additional benefits can be obtained:

• Reduced and No Refrigeration Equipment

• Capital Cost Saving

• Reduced Maintenance.

• Energy Cost Saving

• Reduced CO2 Emission

• Environmentally Friendly Installation

• Improved System Operation / Reliability

• Flexibility for the Future Capacities Changes



 The following documents are available for download: