# Water Heating and Circulating Heating System with Energy-Saving Optimization Control
## 5 Following the Experimental Study
### Experimental Data Comparison  
A summary of the experimental results for different target temperatures and pot volumes is provided in this section. These results are shown in Tables 2-4. The results of the experiments demonstrate the LPPT method can enhance the overall efficiency of the heating system by integrating temperature control and reducing the power input requirements. Table 2 shows the improvement effect of input power under conditions where the pot is 5 L in volume, and the temperature targets are 55, 65, and 75 \({}^{\circ}\)C, respectively. LPPT can increase power by 17.5%, 11.4%, and 6.4% at 55, 65, and 75 \({}^{\circ}\)C, respectively, compared with the traditional control method. In general, the higher the target temperature, the lower the improvement effect will be. Table 3 shows the improvement effect of the input power under conditions where the pot is 10 L in volume and the temperature targets are 55, 65, and 75 \({}^{\circ}\)C, respectively. Compared with the traditional control method of LPPT, when the water temperature is 55, 65, and 75 \({}^{\circ}\)C, the power is increased to 8.3%, 6.1%, and 2.9%, respectively. Table 4 shows the improvement effect of input power under conditions where the pot is 15 L in volume and the temperature targets are 55, 65, and 75 \({}^{\circ}\)C, respectively. Compared with the traditional control method of LPPT, when the water temperature is 55, 65, and 75 \({}^{\circ}\)C, the power is increased to 5.5%, 2.9%, and 1.0%, respectively. When volume increases, efficiency increases by a lower amount, and in low-temperature environments, efficiency increases by a higher amount. The above experimental results show the LPPT method can effectively reduce the steady-state input power, and the smaller the pot and lower the target temperature, the greater the reduction. Further, the results of comparative experiments indicate the LPPT method is appropriate for water heating and circulating systems and is a significant improvement on the heating pots used on a regular basis. In this system, food is cooked by sealing it in a vacuum bag and immersing it in water. Introducing LPPT not only increases cooking accuracy but also allows food to reach a more \begin{table}
\begin{tabular}{c c c c} \hline
**15 L** & **Traditional Control** & **LPPT Control** & **Improvement Percentage** \\ \hline
55 \({}^{\circ}\)C & 243 & 230 & 5.5\% \\
65 \({}^{\circ}\)C & 280 & 272 & 2.9\% \\
75 \({}^{\circ}\)C & 320 & 317 & 1.0\% \\ \hline \end{tabular}
\end{table} 
Table 4: Input wattage and energy-saving ratio for temperature of 55 \({}^{\circ}\)C, 65 \({}^{\circ}\)C, and 75 \({}^{\circ}\)C (pot volume 15 L). \begin{table}
\begin{tabular}{c c c c} \hline
**5 L** & **Traditional Control** & **LPPT Control** & **Improvement Percentage** \\ \hline
55 \({}^{\circ}\)C & 206 & 170 & 17.5\% \\
65 \({}^{\circ}\)C & 220 & 195 & 11.4\% \\
75 \({}^{\circ}\)C & 235 & 220 & 6.4\% \\ \hline \end{tabular}
\end{table} 
Table 2: Input wattage and energy-saving ratio for temperature of 55 \({}^{\circ}\)C, 65 \({}^{\circ}\)C, and 75 \({}^{\circ}\)C (pot volume 5 L). \begin{table}
\begin{tabular}{c c c c} \hline
**10 L** & **Traditional Control** & **LPPT Control** & **Improvement Percentage** \\ \hline
55 \({}^{\circ}\)C & 222 & 204 & 8.3\% \\
65 \({}^{\circ}\)C & 247 & 232 & 6.1\% \\
75 \({}^{\circ}\)C & 275 & 267 & 2.9\% \\ \hline \end{tabular}
\end{table} 
Table 3: Input wattage and energy-saving ratio for temperature of 55 \({}^{\circ}\)C, 65 \({}^{\circ}\)C, and 75 \({}^{\circ}\)C (pot volume 10 L). precise temperature, resulting in better cooking results. Water temperature is easier to control than air temperature, and once the water reaches the desired temperature, the food also reaches the same temperature. The vacuum-sealed bag prevents food moisture loss, thus preserving its original flavor and texture and providing low-temperature cooking benefits. Cooking food in water reduces energy waste, as water can transfer and retain heat more efficiently than air, leading to a reduction in energy consumption.