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

Microturbine generator exhibits the variation of rotational speed versus power output described in figure 10 by the experimental values and the adjusted trend line. Figure 10: MTG rotational speed as a function of power output IV. R esults of the E lectrical E nergy G enerated The quality of the energy generated could be influenced by the quality of combustion process of the fuel. MTG with the Capstone microturbine meets the specifications demanded for class G1 generators, in terms of frequency and voltage deviations during transient processes. Observation of the voltage at the load banks during the test showed a small sensitivity to load level. There is little change in the balance of the three-phase voltages. There is no discernable pattern to the changes in the bus voltage; all three phases respond equally to the load changes. V. C onclusions Microturbine pilot test was carried out to determine performance characteristics, and to assess the possible inconveniences of using the particular high- butane-content LPG. To achieve the technical goals, it was considered a short test based on a two-step sequence of loads. The main conclusion drawn from the study is that, under the scope of this study, the output of the turbine generator was satisfactory, showing its adaptability to the change in fuel. The limited amount of testing done here restricts the applicability of these conclusions to the specific type of LPG used. Cold and warm starts performed well. The estimated efficiency of power generation appeared to be unchanged, as compared to the values indicated by the manufacturers. It can be stated that, based on the short test carried out, gas turbines are an advantageous alternative to the use of reciprocating engines, due to their adaptability to the fuel, their low noise and vibration levels, their compact structure and their efficiency close to that of the diesel engine. The tests showed a higher- than-expected performance and it is about to find out with the supplier how close this value is, since in the literature itself a performance of more than 30% is not expected, while the conducted test showed an efficiency close to 40% for 66% of the load. It is yet to be proven. Gas turbines are an excellent alternative and their technology is very mature for generation and cogeneration standalone applications; in the commercial and industrial sectors, microgrid power parks, remote off-grid locations, presenting only the defect of greater starting time (close to 2 minutes, value obtained from the literature). R eferences R éférences R eferencias 1. ECOPETROL, “Consultancy to Determine the Schemes for Use of Derived Liquid Petroleum Gas Surplus for Electricity Generation in Oil Fields”, April 18, 2013, Bogotá. 2. National Fire Protection Association. NFPA 58:2011. Liquefied petroleum gas code. 2011. 3. Rosa do Nascimento, et al. “Micro Gas Turbine Engine: A Review,” Federal University of Itajubá, Brazil, 2014.Development of Ceramic Gas Turbines in Japan. Techno Japan. Vol. 30, Nº 11, pg. 10-22. Tokio, 1997. 4. Oyakawa K. Development of Ceramic Gas Turbines. JICA. Tsukuba, 1994. 5. Itoh T., Kimura H. Status of the Automotive Ceramic Gas Turbine Development Program. Artículo ASME 92-GT-2. ASME Journal. New York, 1992. 6. Nishiyama T., IWAI M. Status of the Automotive Ceramic Gas Turbine Development Program, Year 0 20 40 60 80 100 120 0 5 10 15 20 25 Speed [min-1/1000] Power output [kW] Engine Speed [min-1] 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 26 Year 2022