Pengaruh Variasi Jumlah Lubang Nozzle Bahan Bakar Terhadap Kinerja Turbin Gas Mikro

Abstract

This study aimed to investigate the effect of nozzle variations on the performance of a micro gas turbine engine using LPG fuel. Gas turbines are mechanical driving machines that utilize compressed air to generate mechanical energy. Micro gas turbines are gas turbines with electrical power below 200 kW. The main components of a gas turbine include a compressor, combustion chamber, turbine, and generator. The performance of a micro gas turbine depends on the control of fuel and air inputs, as well as the mass ratio between them. Parameters such as compressor work, turbine work, back work ratio, net work, and thermal efficiency are used to measure the performance of micro gas turbines. In this study, nozzle variations were performed on the micro gas turbine. The results showed that the single-hole nozzle variation exhibits higher ideal and net turbine performance compared to the 16-hole nozzle variations. However, the single hole variations have higher Back Work Ratios (BWR), indicating better efficiency. Additionally, thermal efficiency is influenced by the inlet and outlet temperatures of the turbine generated by each nozzle variation. The single-hole nozzle variation achieved the highest thermal efficiency of 182.7% at a fuel mass flow rate of 13.10 l/min, while the 16 hole nozzle variations reached the highest thermal efficiency of 45,38% at a fuel mass flow rate of 17,89 l/min. Keywords : Gas turbine, micro gas turbine, nozzle variation, thermal efficiency