## 2 Literature Review
### LHTES Systems in Greenhouses
#### 2.1.4 Categorization of Previous Works on Greenhouse LHTES System Based on Efficient Factors
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Author** & **Year** & **Method** & \multicolumn{2}{c}{**Factors**} & \multicolumn{1}{c}{**Outcomes**} \\ \cline{4-5}  & & **PCM** & **Product** & **Evaluated Parameters** & \\ \hline Ziapour and & & & & Cucumber, & \\ Hashroud [33] & 2017 & Analytical & Paraffin & Cucumber, & \\  & & & grape, and & \\  & & & strawberry & \\ \hline \multirow{4}{*}{[PERSON] et al. [27]} & \multirow{4}{*}{2018} & \multirow{4}{*}{Experimental} & \multirow{4}{*}{\begin{tabular}{c} Shape- \\ stabilizedPCM, \\ paraffin wax, \\ polyethylene, and \\ graphite \\ \end{tabular} } & \multirow{4}{*}{NA} & \begin{tabular}{c} Comparing the results of both cases of the proposed \\ walls for the greenhouse with PCM and the \\ conventional walls. \\ \end{tabular} & Increased heat storage capacity of the wall & Increased heat & \\  & & & & by 35.27-47.89\% and the heat release \\ \cline{1-1}  & & & & capacity by 49.93–60.21\% \\ \hline \multirow{2}{*}{[PERSON] et al. [54]} & \multirow{2}{*}{2019} & \multirow{2}{*}{Experimental} & \multirow{2}{*}{\begin{tabular}{c} Calcium chloride \\ hexhydrate (CaCl\({}_{2}\)-6H\({}_{6}\)O) \\ \end{tabular} } & \multirow{2}{*}{Barley} & \begin{tabular}{c} Evaluation of the viability of a novel hydroponic \\ greenhouse and a brand-new solar air heater with latent \\ storage energy for heating the greenhouse at night. \\ \end{tabular} & \begin{tabular}{c} The hydroponic greenhouse’s overnight \\ temperature increased by 6 \({}^{\circ}\)C, and the \\ nocturnal temperature was often over \\ 15 \({}^{\circ}\)C. \\ \end{tabular} & \begin{tabular}{c} The average thermal efficiency of the \\ dry with and without PCM is \\ 30.34\% and 23.25\% for drying \\ banana and 30.28\% and 42.86\% for drying \\ driving pineapple, respectively. \\ - & With PCM thermal storage, drying \\ efficacy is increased by 72\%. \\ \end{tabular} & \begin{tabular}{c} The average thermal efficiency of the \\ dry with and without PCM is \\ 30.34\% and 23.25\% for drying \\ banana and 30.28\% and 42.86\% for drying pineapple, respectively. \\ - & With PCM thermal storage, drying \\ efficacy is increased by 72\%. \\ \end{tabular} & \
\begin{tabular}{c} The average thermal efficiency of the \\ dry with and without PCM is \\ 30.32\% and 23.25\% for drying \\ banana and 30.28\% and 42.86\% for drying pineapple, respectively. \\ - & With PCM thermal storage, drying \\ efficacy is increased by 72\%. \\ \end{tabular} &
\begin{tabular}{c} The average thermal efficiency of the \\ dry with and without PCM is \\ 30.34\% and 23.25\% for drying \\ banana and 30.28\% and 42.86\% for drying pineapple, respectively. \\ - & With PCM thermal storage, drying \\ efficacy is increased by 72\%. \\ - & The air temperature inside a solar \\ greenhouse with a PCM of \\ approximately 7.5 \({}^{\circ}\)C greater than \\ other dries during the night. \\ - & The relative humidity in the drying room with PCM is roughly 18.6\% lower than the surrounding air \\ at night. \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 1: _Cont._  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Author**} & \multirow{2}{*}{**Year**} & \multirow{2}{*}{**Method**} & \multicolumn{4}{c}{**Factors**} & \multirow{2}{*}{**Outcomes**} \\ \cline{3-4} \cline{6-7}  & & & **FCM** & & **Product** & & **Evaluated Parameters** \\ \hline [PERSON] et al. [37] & 2022 & Experimental & Beeswax & Groundut & \begin{tabular}{c} Simple greenhouse dryer (SGHD) and modified \\ greenhouse dryer with PCM (MGHD). \\ \end{tabular}  & About 23.45\% more moisture evaporated \\  & & & & & & & from the groundnut sample drying under \\  & & & & & & & MGHD than under SGHD. \\ \hline [PERSON] et al.