Analisis Kinerja Turbin Uap Sebelum dan Setelah Proses Overhaul di PT PERTAMINA GEOTHERMAL ENERGY Area Kamojang

Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Pub Date : 2022-01-31 DOI:10.32493/jitk.v6i1.14492

Elli Prastyo, Indah Dhamayanthie

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Abstract

One of the important components in geothermal power generation is steam turbines. One of the decreases in steam turbine performance is caused by excessive workload due to continuous operation. Maintenance of steam turbines through important overhauls is carried out to improve the performance of steam turbines. Actual conditions with ideal conditions are important to know and analyze to know the performance of steam turbines. The operational performance of steam turbines at PT Pertamina Energi Geothermal Area Kamojang can be seen from the value of turbine working specifications (Wt), and isentropic efficiency (ηt). Parameters in the form of inlet pressure (P1), outlet pressure (P2), inlet temperature (T1), outlet temperature (T2), and flow rate (m/s) are searched using the ChemicalLogic SteamTab application and linear interpolation methods to determine the value of enthalpy and entropy. The results were obtained that the value of isentropic enthalpy (h2s) before the overhaul amounted to 2,127.41 kJ/kg and after an overhaul of 2,145.91 kJ/kg. Turbine power value (Ẇt) before overhaul was 30,702.88 kW and after overhaul was 36,304.7 kW. Efficiency after overhaul decreased ±1.4% of efficiency before the overhaul.

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PT PERTAMINA geomal ENERGY Kamojang对蒸汽机性能的分析前后

汽轮机是地热发电的重要部件之一。汽轮机性能下降的原因之一是由于连续运行造成的负荷过大。通过重要的大修对汽轮机进行维护，以提高汽轮机的性能。了解和分析汽轮机的实际工况和理想工况是了解汽轮机性能的重要途径。从汽轮机工作规格(Wt)和等熵效率(ηt)的值可以看出Kamojang PT Pertamina Energi地热区汽轮机的运行性能。使用ChemicalLogic SteamTab应用程序和线性插值方法搜索进口压力(P1)、出口压力(P2)、进口温度(T1)、出口温度(T2)和流量(m/s)形式的参数，以确定焓和熵的值。结果表明，大修前等熵焓(h2s)为2127.41 kJ/kg，大修后等熵焓为2145.91 kJ/kg。涡轮功率值(Ẇt)大修前为30702.88 kW，大修后为36304.7 kW。大修后的效率比大修前的效率下降±1.4%。

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Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia

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