Penelitian ini mengangkat topik “Analisis Pengaruh Temperatur Gas Buang Terhadap Potensi Peningkatan Daya Pada PLTG Batanghari Unit 1 Kapasitas 30 MW”. Pembangkit listrik berbahan bakar gas atau PLTG, secara umum memiliki efisiensi sebesar 25 - 30%, yang artinya memiliki rugi-rugi mencapai 70%. Hal tersebut dikarenakan prinsip kerja PLTG menggunakan siklus terbuka (open cycle) dimana panas pada gas buang yang masih memiliki temperatur sangat tinggi langsung dilepas ke atmosfer. Penelitian dilakukan untuk mengetahui pengaruh temperatur gas buang terhadap potensi peningkatan daya melalui simulasi permodelan siklus gabungan (combined cycle). Berdasarkan data perhitungan, didapatkan aliran energi pada gas buang paling tinggi sebesar 51,99 Mega Watt, sedangkan yang paling rendah sebesar 46,49 Mega Watt. Dari simulasi permodelan menggunakan program Cycle Tempo, potensi peningkatan daya tertinggi dari pemanfaatan kembali gas buang adalah sebesar 13,03 Mega Watt atau mengalami peningkatan daya gabungan sebesar 42,86%. Sedangkan yang terendah adalah sebesar 11,89 Mega Watt atau setara dengan peningkatan daya gabungan sebesar 39,76%. Dari hasil pembahasan diketahui bahwa nilai temperatur gas buang PLTG memberikan pengaruh fluktuatif terhadap potensi peningkatan daya keluaran generator PLTU. Selain temperatur gas buang, peningkatan daya juga dipengaruhi oleh laju aliran massa gas buang dan beban PLTG, serta laju aliran massa pada main steam.

This research raises the topic of “Analysis Of The Effect Of Exhaust Gas Temperature On Power Enhancement Potential At 30 MW Gas Turbine Power Plant Batanghari Unit 1”. Gas-fired power plants or called PLTG, generally have an efficiency of 25 - 30%, which means that they have losses of up to 70%. This is because the working principle of PLTG uses an open cycle, where the heat in the flue gas which still has a very high temperature is directly released into the atmosphere. The research was conducted to determine the effect of exhaust gas temperature on the potential for increasing power through a combined cycle modeling simulation. Based on the calculation data, the highest energy flow in the exhaust gas is 51.99 Mega Watts, while the lowest is 46.49 Mega Watts. From the modeling simulation using the Cycle Tempo, the highest potential increase in power from exhaust gas reuse is 13.03 Mega Watts or an increase in combined power of 42.86%. While the lowest was 11.89 Mega Watt or equivalent to an increase in combined power of 39.76%. From the results of the discussion, it is known that the value of the exhaust temperature of gas turbine has a fluctuating effect on the potential for increasing the output power of the steam turbine generator. In addition to the exhaust gas temperature, the increase in power is also influenced by the mass flow rate of the exhaust gas and the load of gas turbine, as well as the mass flow rate of the main steam.