Thermal Energy Storage

Thermal energy storage (TES) involves the capture of thermal energy generated during one time period for later use during another. TES has been used for decades in one form or another for space and process heating and cooling applications. There are many types of TES applications. Examples include storage of solar heat for night heating, storage of heat recovery-generated hot water for use as needed for fluctuating loads, storage of ice in winter for use in summer, and storage of a cooling medium generated by an electric chiller during off-peak periods for use during peak periods.

TES may involve sensible or latent storage. Sensible storage is accomplished by raising or lowering the temperature of storage media, such as water or solids, without producing a phase change. Latent storage is accomplished by a phase change of the storage media, typically from liquid to solid, such as water/ice or salt hydrates.

For heating applications, water, oils, phase change media (such as eutectic salts), and solids (such as rock or brick) are most commonly used. For cooling applications, water and phase change media, including both ice and eutectic salts, are typically used. Other latent-heat types of cool storage media include carbon dioxide (CO2), which is used for applications such as low-temperature food freezing, and liquid nitrogen, which is used for cryogenic operation conditions.

Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

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