Analisa Termodinamika Pengaruh Penurunan Tekanan Vakum Pada Kondensor Terhadap Performa Siklus PLTU Menggunakan Software Gate Cycle (Studi Kasus PLTU Unit 4, PJB UP Gresik)

Hariyadi, Slamet (2014) Analisa Termodinamika Pengaruh Penurunan Tekanan Vakum Pada Kondensor Terhadap Performa Siklus PLTU Menggunakan Software Gate Cycle (Studi Kasus PLTU Unit 4, PJB UP Gresik). Other thesis, Insititut Teknologi Sepuluh Nopember.

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Abstract

Pembangkit listrik tenaga uap (PLTU) unit 4, PT. Pembangkit Jawa Bali Unit Pembangkitan Gresik (PT. PJB UP Gresik) mengalami derating, diduga salah satu penyebabnya adalah penurunan tekanan vakum pada kondensor. Hal ini mengakibatkan daya yang dihasilkan dan efisiensi siklus mengalami penurunan apabila dibandingkan dengan sebelum terjadinya penurunan tekanan vakum pada kondensor. Dimana pada saat ini, PLTU unit 4 hanya bisa mencapai load maksimal sebesar 185 MW dari desain sebesar 200 MW. Penelitian ini menganalisa akibat penurunan tekanan vakum pada kondensor terhadap performa siklus PLTU unit 4 PT. PJB UP Gresik dengan pendekatan analisa termodinamika serta dilakukan proses simulasi dengan membuat model pembangkit PLTU Unit 4 PT. PJB UP Gresik ke dalam software Gate Cycle, sehingga nantinya dapat diketahui pengaruh penurunan tekanan vakum pada kondensor terhadap nilai parameter operasional pada komponen utama power plant. Hasil yang didapatkan penelitian ini yaitu turunnya 0.1 % efisiensi pembangkit diakibatkan oleh penurunan tekanan vakum pada kondensor sebesar 6 mmHg dan menyebabkan hilangnya daya sebesar 663.36 kW. Sehingga pada saat operasional saat ini, dimana range tekanan vakum sebesar 670- 691 mmHg, maka efisiensi total turun sebesar 0.378 % dan daya total yang hilang sebesar 2.32 MW dari keadaan sesuai desain. Dari hasil simulasi, didapatkan penurunan tekanan vakum mengakibatkan kenaikan nilai parameter operasional yakni berupa kenaikan laju alir massa, suhu, tekanan dan entalpi pada Low Pressure Turbin, Kondensor, Condensate Pump dan Feed Water Heater 1.
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Steam power plant units 4, PT. PJB UP Gresik experienced a derating, allegedly one of the reasons is the vacuum pressure drop in the condenser. It will affects decreasing in the power generation and the cycle efficiency if it compared with the previous condition before vacuum pressure drop occurs. The current condition, the power plant unit 4 can only reach a maximum load of 185 MW from the design of 200 MW. This study shows a causal relationship between vacuum pressure drop in condenser and cycle performance of power plant unit 4 PT. PJB UP Gresik with thermodynamic analysis approach and simulation process will be done by creating a model of steam power plant Unit 4 PT . PJB UP Gresik to the Gate Cycle software, so it will find the influence of vacuum pressure in the condenser to the value of the operational parameters of the main components of the power plant. The results of this study found that 0.1 % decline in plant efficiency due to the decrease in the condenser vacuum pressure by 6 mm Hg. Any reduction in condenser vacuum pressure by 1 mmHg, resulting in a loss of power of 110.56 kW. Finally, in the current operation, where the range of 670- 691 mm Hg vacuum pressure, the total efficiency decreased by 0.378% and total power lost by 2.32 MW of condition appropriate design. From the simulation results, obtained vacuum pressure reduction resulted in an increase the value of the operational parameters, that is increase in mass flow rate, temperature, pressure and enthalpy at Low Pressure Turbine, Condenser, Condensate Pump and Feed Water Heater 1.

Item Type:	Thesis (Other)
Additional Information:	RSM 621.197 Har a-1, 2014
Uncontrolled Keywords:	ekanan vakum, kondensor, efisiensi, PLTU, rugi daya, gate cycle, vacuum pressure, condenser, efficiency, power plant, power loss, g
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ265.E23 Thermodynamics.
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	15 Jan 2024 04:37
Last Modified:	15 Jan 2024 04:37
URI:	http://repository.its.ac.id/id/eprint/105483

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