Heat transfer and fluid flow through porous media have received great attention due to its wide applications in engineering fields, such as acoustics, filtrations, and thermal energy storage. Thermal energy storage (TES) is a technique to stock thermal energy for later use in many applications, such as district heating. TES is used to store solar thermal energy and excessive heat from non-natural sources to provide a reliable, stable, and cheap thermal energy. The present study considers a simple and inexpensive design which can easily be constructed using readily available porous media that are commonly found in nature. The applications of the present study can aid in decreasing the expenditures of heating spaces by reducing energy consumption and peak demand. The present study experimentally investigated the effect of grains size of used porous media (sand, gravel, and rocks) on the heat transfer through TES. Also, the experimental study was used to validate the numerical model which was implemented to investigate the effect of the design parameters, such as pipes burial depth and pipes spacing and the permeability of porous media, on the performance of TES during the charging and discharging processes. The present study showed that a shallow burial depth and placing pipes close together resulted in the maximized performance of TES. Moreover, the stored thermal energy can last longer during thermal discharging process when the used storage medium has low permeability. An experimental model can be used for future studies to optimize the performance during the discharging process to save time and money.
|Advisor:||Ngo, Chean C.|
|Commitee:||Azzazy, Medhat, Wang, Haowei|
|School:||California State University, Fullerton|
|School Location:||United States -- California|
|Source:||MAI 56/04M(E), Masters Abstracts International|
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