ANALISIS KINERJA COOLING TOWER TIPE INDUCED DRAFT COUNTER FLOW PADA TEXTURIZING KAPASITAS 1467 kW

HUTABALIAN, ELKANA (2024) ANALISIS KINERJA COOLING TOWER TIPE INDUCED DRAFT COUNTER FLOW PADA TEXTURIZING KAPASITAS 1467 kW. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

Cooling tower is a heat transfer equipment where the working fluids are water and air. The function of the cooling tower is to reduce the temperature of the water by exchanging the heat energy of the water into the air so that the water at a certain temperature decreases and can be reused. Cooling tower that used at the Texturizing Plant PT. Wilmar Unit Serang has an induced draft counter flow type with a capacity of 1467 kW. This cooling tower functions as circulating cooling water on the plate heat exchanger to reduce the temperature of the RBD (refined, bleached, deodorized) palm oil. The cooling tower has never had its actual performance analyzed after operating for two years. Cooling tower performance data is very important as a reference in maintaining operational efficiency and reducing energy costs. To solve this problem, research was carried out by collecting operational data and calculating cooling tower performance parameters over a certain time. The analysis method used is to compare the effectiveness and cooling capacity values based on design data and operational data. From the processing and analysis of the data, an average effectiveness value of 71.3% was obtained, which is better than the design effectiveness of 67%. There were fluctuations in the cooling capacity values during the observation period, ranging from 1109.32 kW to 1245.87 kW, affected by changes in dry bulb air temperature. The evaporation rate during the cooling process is 0.495 kg/s, which matches the design data. It can be concluded that the actual performance of the cooling tower is already quite good and optimization can be achieved by reducing the fan rotation speed to 1310 rpm to reduce energy costs. Keywords: Cooling tower, performance, cooling capacity Cooling tower merupakan sebuah alat pemindah kalor dimana fluida kerja yang digunakan adalah air dan udara. Fungsi cooling tower yaitu menurunkan temperatur air dengan cara menukar energi kalor air ke udara sehingga air dengan temperatur tertentu tersebut mengalami penurunan dan dapat digunakan kembali. Cooling tower yang digunakan pada Texturizing Plant PT. Wilmar Unit Serang bertipe induced draft counter flow dengan kapasitas 1467 kW. Cooling tower ini berfungsi sebagai sirkulasi air pendingin pada plate heat exchanger untuk menurunkan suhu RBD (refned, bleached, deodorized) palm oil. Cooling tower tersebut belum pernah dianalisa kinerja aktualnya setelah beroperasi selama dua tahun. Data kinerja menara pendingin sangat penting sebagai acuan dalam menjaga efisiensi operasional dan mengurangi biaya energi. Untuk memecahkan masalah tersebut penelitian dilakukan dengan mengumpulkan data operasional dan menghitung parameter kinerja menara pendingin selama waktu tertentu. Metode analisis yang digunakan adalah membandingkan nilai efektivitas dan kapasitas pendinginan berdasarkan data desain dan data operasional. Dari hasil pengolahan dan analisis data diperoleh nilai efektivitas rata-rata sebesar 71,3%, yang lebih baik dibandingkan efektivitas desain, yaitu 67%. Terdapat fluktuasi pada nilai kapasitas pendinginan selama waktu pengamatan, dihasilkan sebesar 1109.32 kW sampai 1245.87 kW yang dipengaruhi oleh perubahan temperatur dry bulb udara. Laju evaporasi selama proses pendinginan sebesar 0.495 kg/s, dimana nilainya sesuai dengan data desain. Dapat disimpulkan bahwa kinerja aktual dari menara pendingin sudah cukup baik dan dapat dilakukan optimalisasi dengan menurunkan kecepatan putaran fan hingga 1310 rpm untuk mengurangi biaya energi Kata kunci: Cooling tower, kinerja, kapasitas pendinginan

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