Studi Exergy Destruction Pengaruh Temperatur Udara Inlet Compressor Gas Turbine Pada Combine Cycle

Marzuki, Marzuki (2021) Studi Exergy Destruction Pengaruh Temperatur Udara Inlet Compressor Gas Turbine Pada Combine Cycle. Masters thesis, INSTITUT TEKNOLOGI SEPULUH NOPEMBER.

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Abstract

PLTGU merupakan pembangkit listrik combine cycle, yang merupakan gabungan dari siklus brayton dan siklus rankine. Salah satu faktor yang mempengaruhi efisiensi adalah temperature ambient udara inlet compressor gas turbine. Semakin rendah temperatur udara, maka semakin tinggi massa jenisnya, sehingga berpengaruh terhadap efisiensi thermal. Penelitian exergy destruction ini dilakukan di PLTGU Tambak Lorok PT. Indonesia Power Semarang PGU Blok 2 yang memiliki 3 unit Gas Turbine, 3 unit HRSG dan 1 unit Steam Turbine dimana beroperasi continuous 24 jam dengan temperature udara ambient bervariasi antara 24 0C s.d 33 0C. Exergy adalah kerja maksimum teoritis yang mampu diperoleh saat system tersebut berinteraksi dalam mencapai kesetimbangan. Tujuan analisis exergy untuk megidentifikasi terjadinya pemusnahan exergy dan timbulnya kerugian serta mengurutkannya terhadap tingkat kepentingan. Peralatan yang dilakukan analisa adalah PLTGU Blok 2 dengan pola operasi 3-3-1 dan GTG-HRSG 2.2 dengan variasi temperatur ambient inlet compressor 24 0C s.d 33 0C. Hasil Penelitian pola 3-3-1 Blok 2 menunjukan bahwa total kehancuran exergi pada GTG 2.1 sebesar 13.209 MW, GTG 2.2 sebesar 13.279 MW, GTG 2.3 sebesar 11.952 MW, sedangkan HRSG 2.1 sebesar 19.294 MW, HRSG 2.2 sebesar 12.514 MW, HRSG 2.3 sebesar 16.399 MW, dan STG 2.0 sebesar 44.42 MW. Selanjutnya hasil perhitungan kehancuran exergi GTG-HRSG 2.2 pada temperatur ambient 24 0C sebesar 15.568 MW, pada temperatur ambient 28 0C sebesar 16.092 MW dan pada temperatur ambient 33 0C sebesar 17.620 MW, hal ini dapat disimpulkan bahwa semakin tinggi temperatur ambient inlet compressor maka semakin meningkat laju kehancuran exerginya. ====================================================================================================== PLTGU is a combine cycle of power plant, which is a combination of the Brayton cycle and the Rankine cycle. One of the factors that affect efficiency is the ambient air temperature of the compressor gas turbine inlet. The lower the air temperature, the higher the density, so that it affects the thermal efficiency. This exergy destruction research was conducted at PLTGU Tambak Lorok PT. Indonesia Power Semarang PGU Block 2 which has 3 units of Gas Turbine, 3 units of HRSG and 1 unit of Steam Turbine which operate continuously 24 hours with ambient air temperature varying between 24 0C to 33 0C. Exergy is the theoretical maximum work that can be obtained when the system interacts to reach equilibrium. The purpose of exergy analysis is to identify the occurrence of exergy annihilation and the occurrence of losses as well as to sort them into the level of importance. The equipment analyzed was PLTGU Block 2 with an operating pattern of 3-3-1 and GTG-HRSG 2.2 with a variation of ambient temperature inlet compressor 24 0C to 33 0C. The results of the research pattern 3-3-1 Block 2 showed that the total exergy destruction in GTG 2.1 was 13.209 MW, GTG 2.2 was 13.279 MW, GTG 2.3 was 11.952 MW, while HRSG 2.1 was 19.294 MW, HRSG 2.2 was 12.514 MW, HRSG 2.3 was 16.399 MW, and STG 2.0 was 44.42 MW. Furthermore, the calculated results of the exergy destruction of GTG-HRSG 2.2 at an ambient temperature of 24 0C was 15,568 MW, at an ambient temperature of 28 0C was 16,092 MW and at an ambient temperature of 33 0C was 17,620 MW. Thus, it could be concluded that the higher the ambient inlet temperature of the compressor, the higher the exergy rate destruction.

Item Type: Thesis (Masters)
Uncontrolled Keywords: KCombine Cycle Power Plant, Efisiensi, Exergy Destruction, Gas Turbine, HRSG, Steam Turbin. Combine Cycle Power Plant, Efisiensi, Exergy Destruction, Gas Turbine, HRSG, Steam Turbin.
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction
T Technology > TJ Mechanical engineering and machinery > TJ265.E23 Thermodynamics.
T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User: MARZUKI MARZUKI
Date Deposited: 26 Aug 2021 05:30
Last Modified: 26 Aug 2021 05:30
URI: https://repository.its.ac.id/id/eprint/90040

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