# Impact of Plasma Combustion Technology on Micro Gas Turbines Using Biodiesel Fuels
## 3 Results and Discussion
### Gas Turbine Compressor Inlet/Outlet Temperature  
The temperature of the assembled unit was taken using several 2 m length specialized thermometer instruments (model no: MT-TCE 50 and Part No: MT-TCE 50 K) installed strategically on the fabricated MGT engine and other auxiliary devices to monitor several temperature readings, including the surrounding ambient temperature, the temperature before the compression process, the temperature after the compression process, the exhaust temperature, and the engine oil-cooled kerosene and biodiesel fuel temperatures. The impact of the external integrated plasma technology on the compressor inlet temperature is reflected in the 10 \({}^{\circ}\)C increase recorded across all applied fuels compared with GTE operation under normal conditions, as highlighted in Table 3. The result supports the need for increased temperature of the combustion chamber for the effective performance of the engine. A slight increase in firing temperature significantly impacted the produced horsepower and engine efficiency. Continuous heating is achieved with plasma technology compared with regular GTE operation without plasma technology under the three different loading conditions in Table 4. The increased inlet temperature supports the combustion chamber temperature buildup for effective combustion performance of the engine in order to achieve continued heating. The B20 biofuel blend recorded the highest inlet temperature under low and medium loading, with an increase in loading conditions across all biodiesel blended fuels. Under the external integrated plasma technology, B75 and B100 recorded the highest inlet temperatures at the most elevated loading conditions (Figure 8a). This may be due to the high-temperature characteristics of plasma technology, which influence the spectacular increase in the load. The impact of load increase affected the change in temperature measured at the compressor inlet, as observed for all fuel temperature measurements. The higher the loading, the greater the compressor inlet temperature. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Mini GTE Loading**} & \multirow{2}{*}{**GTE Operation Scenarios**} & \multicolumn{4}{c}{**Compressor Inlet Temperature Across Fuel Samples (\({}^{\circ}\)C)**} \\ \cline{3-7}  & & **Diesel** & **Kerosene** & **B20** & **B50** & **B75** & **B100** \\ \hline \multirow{2}{*}{Low} & Normal Operation & 31.9 & 30.1 & 28.9 & 28 & 28.9 & 31.6 \\ \cline{2-7}  & Plasma + Rich Mixture & 32.5 & 32.1 & 39.8 & 32.8 & 31.9 & 35.4 \\ \hline \multirow{2}{*}{Medium} & Normal Operation & 32.5 & 30.7 & 30.7 & 30.5 & 30.5 & 28.6 \\ \cline{2-7}  & Plasma + Rich Mixture & 37.9 & 30 & 40.1 & 39.4 & 37.4 & 39.3 \\ \hline \multirow{2}{*}{High} & Normal Operation & 32.3 & 29 & 31 & 31 & 31.6 & 33.1 \\ \cline{2-7}  & Plasma + Rich Mixture & 43.9 & 41.6 & 35.4 & 41.9 & 44.9 & 45.5 \\ \hline \hline \end{tabular}  
* In the Table 4, yellow highlights indicate the biodiesel improved value from integrated plasma and rich fuel mixture.  
\end{table} 
Table 4: Compressor inlet temperature under different loading conditions. Figure 8: (**a**) Compressor inlet temperature comparison plot. (**b**) Compressor outlet temperature comparison plot. The integrated hybrid plasma-rich fuel mixture technology also increases the compressor outlet temperature of the MGT with increased loading, as displayed in Table 4. The highest compressor outlet temperature in the fabricated GTE was recorded under integrated hybrid plasma-rich fuel mixtures B75 and B100 under low and high loading conditions, as displayed in Table 5. A temperature incremental percentage value of 100.6% for B75 and 87.6% for B100 was observed across the three loading states of the GTE for the six deployed fuel results highlighted in Table 5. The highest compressor outlet temperature of 206 \({}^{\circ}\)C was recorded under the highest loading condition by adopting a B75 blend mixture.