Global Journal of Researches in Engineering, A: Mechanical & Mechanics, Volume 22 Issue 1

Figure 2: Schematic diagram of the instrumented power unit [3] A large on-board battery pack is used to start the microturbine, and also to store energy when the microturbine decelerates to produce less power. To meet output power requirements automatically, the system can be configured in Auto Load mode. Auto Load ensures that the microturbine closes the output contactor to immediately produce the required output power once minimum engine load speed is reached. The output speed-power characteristic of the microturbine generator is reproduced in figure 3. Figure 3: c) Experimental facility and procedures LPG was supplied from an oil field to the test site by a tanker with a storage pressure ranged between 50 and 90 psia during the test; an intermediary damper tank was used to reduce pressure fluctuations due to consumption, and a bypass was used in the LPG supply line with its respective regulating valves before the entry of gaseous fuel to guarantee the pressure, as can be observed in the photographs of figure 4. The average ambient conditions at the time of the test were: temperature close to 14°C, 80,2% relative humidity, and 0,726 atmospheric pressure. Performance of a Capstone Gas Turbine based Power Plant Working on High Butane LPG © 2022 Global Journals Global Journal of Researches in Engineering (A ) Volume XxXII Issue I Version I 20 Year 2022 Microturbine speed at partial loads [3]