## 4 Calculating the Fuel Efficiency Indicator Using the WSM and the WPM
Ready-to-use slurries can be stored in land and underground reservoirs, whereas the initial components need to be stored in silos in containers or tanks, depending on the type of component. Slurries based on coal dust tend to laminate quickly, which requires stirring and using a stabilizer. The lamination rate of mixtures, based on waste with oils, is much lower; therefore, no frequent or continuous stirring is necessary. Consequently, coal and waste-derived slurries were assigned a normalized value of 0.8 for the criterion under consideration, whereas coal-water fuel was assigned a value of 0.5 (Table 9). Thus, using the data from Tables 9-11, we determined the integral efficiency indicators of five fuels for three countries using the WSM and the WPM. The calculation results are presented in Tables 12 and 13. \begin{table}
\begin{tabular}{c c} \hline
**Fuel** & \(T_{d}{}^{max}\) (\({}^{\circ}\)C) \\ \hline
100\% filter cake (wet) & 880 \\
55\% coal, 45\% water & 1035 \\
40\% filter cake (dry), 50\% water, 10\% waste turbine oil & 1050 \\
20\% coal sludge, 30\% filter cake, 10\% peat, 40\% water & 1023 \\
100\% coal & 1350 \\ \hline \end{tabular}
\end{table} 
Table 11: Maximum combustion temperatures of the fuels under study (at 700 \({}^{\circ}\)C). \begin{table}
\begin{tabular}{c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**No. of Fuel**} & \multirow{2}{*}{**Composition**} & \multicolumn{3}{c}{**Russia**} & \multicolumn{3}{c}{**Japan**} & \multicolumn{3}{c}{**China**} \\ \cline{3-11}  & & **700\({}^{\circ}\)C** & **800\({}^{\circ}\)C** & **900\({}^{\circ}\)C** & **700\({}^{\circ}\)C** & **800\({}^{\circ}\)C** & **900\({}^{\circ}\)C** & **700\({}^{\circ}\)C** & **800\({}^{\circ}\)C** & **900\({}^{\circ}\)C** \\ \hline
1 & 100\% filter cake (wet) & 0.628 & 0.644 & 0.562 & 0.600 & 0.622 & 0.535 & 0.618 & 0.644 & 0.551 \\
2 & 55\% coal, 45\% water & 0.354 & 0.353 & 0.335 & 0.290 & 0.291 & 0.275 & 0.354 & 0.357 & 0.337 \\
3 & 40\% filter cake (dry), 50\% water, 10\% waste turbine oil & 0.686 & 0.709 & 0.686 & 0.682 & 0.728 & 0.705 & 0.662 & 0.716 & 0.694 \\
4 & 20\% coal sludge, 30\% filter cake, 10\% peat, 40\% water & 0.604 & 0.622 & 0.599 & 0.553 & 0.586 & 0.582 & 0.546 & 0.584 & 0.589 \\
5 & 100\% coal & 0.319 & 0.296 & 0.296 & 0.268 & 0.230 & 0.236 & 0.321 & 0.268 & 0.278 \\ \hline \hline \end{tabular}
\end{table} 
Table 13: Integral efficiency indicators of the fuels using the WPM. \begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**No. of Fuel**} & \multirow{2}{*}{**Composition**} & \multicolumn{3}{c}{**Russia**} & \multicolumn{3}{c}{**Japan**} & \multicolumn{3}{c}{**China**} \\ \cline{3-11}  & & **700\({}^{\circ}\)C** & **800\({}^{\circ}\)C** & **900\({}^{\circ}\)C** & **700\({}^{\circ}\)C** & **800\({}^{\circ}\)C** & **900\({}^{\circ}\)C** & **700\({}^{\circ}\)C** & **800\({}^{\circ}\)C** & **900\({}^{\circ}\)C** \\ \hline
1 & 100\% filter cake (wet) & 0.725 & 0.745 & 0.714 & 0.690 & 0.720 & 0.677 & 0.711 & 0.745 & 0.697 \\
2 & 55\% coal, 45\% water & 0.566 & 0.564 & 0.553 & 0.521 & 0.523 & 0.511 & 0.561 & 0.564 & 0.552 \\
3 & 40\% filter cake (dry), 50\% water, 10\% waste turbine oil & 0.777 & 0.797 & 0.758 & 0.761 & 0.800 & 0.759 & 0.747 & 0.794 & 0.752 \\
4 & 20\% coal sludge, 30\% filter cake, 10\% peat, 40\% water & 0.675 & 0.690 & 0.681 & 0.626 & 0.648 & 0.660 & 0.618 & 0.643 & 0.664 \\
5 & 100\% coal & 0.526 & 0.505 & 0.535 & 0.490 & 0.434 & 0.471 & 0.532 & 0.462 & 0.502 \\ \hline \hline \end{tabular}
\end{table} 
Table 12: Integral efficiency indicators of the fuels using the WSM.