LITERATURE SUMMARY: A brief literature analysis should be given by reviewing the national and international literature in the field related to the project topic. In this analysis, the importance of the proposed research topic in the literature, its background, curent situation, problems experienced, deficiencies, gaps to be filled, etc. should be dearly and precisely presented. The literature review should provide a summarized analysis of the relevart literature, not a raw list of literature

The FDM groups shown in this table have some advantages and disadvantages in practice. Parameters such as phase change enthalpy, phase change temperature, thermal conductivity and thermal conductivity in solid and liquid state should be taken into account when selecting FDMs$.$ Candidate materials for use as FDMs are those that show phase change in the range $0-120C.$ These materials are classified as organic, inorganic and their mixtures. Examples of inorganic FDMs are salt hydrates and clathrate hydrates. Their advantages are: high melting temperature, good thermal conductivity, cheap and non$-$flammable, while their disadvantages are: corrosiveness, supercooling, phase separation and reduction in the number of hydrates. Examples of organic FDMs are paraffins and fatty acids. Their advantages are: chemically stable, little or no supercooling, non$-$corrosive and non$-$toxic, high melting temperature and low vapor pressure, while their disadvantages are low thermal conductivity, large volume change during phase change and flammability. Thermal energy storage is defined as high or low thermal energy stored for later use. It is a property that acts as a transition between the time between energy requirement and energy utilization. Latent Heat storage is a technique in which FDMs utilize phase change latent heat for energy storage. This phenomenon occurs during phase change over a certain temperature range. This is why this technique is called latent heat storage technique.

Citena for FDM selection

$1-$Thermodynamic citena: Suitable meling temperaturerange

$-$Have a high melting temperature per unit volume or mass to store a high percentage of energy using fewer FDMs

$-$It should have a high heat storage capacity and a high density so that it can be placed in small volume storages.

$-($In order to reduce the time required during storage and recovery$)2-$ As kinetic criteria, it should show little or no supercooling effect during solidification. For successful crystallization, the nucleation rate of the material should be high and the crystal formation rate should be large.

$3-$It should show chemical stability as chemical criteria. The melting and solidification process must be completely reversible. It should not undergo chemical degradation after a large number of melting and solidification processes, that is$,$ it should be long$-$lasting.

Latent heat storage method is one of the most effective thermal energy storage methods among different heat energy storage methods due to its high energy storage method. Substances show $4$ types of phase change.

$1-$Solid illquid

$2-$Solidgas

$3-$ Liquidas

$4-$Solid$-$solid phase change