Prasetyo, Ridwan (2021) Laporan Magang Industri Rencana Otomatisasi Sistem Pendingin Marine Diesel Berbasis Cooling Tower Pada Bengkel Uji Motor. Project Report. [s.n.], [s.l.]. (Unpublished)
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Abstract
Proses diawali dengan menyalakan pompa HW. Hal ini dilakukan dengan tujuan untuk mengisi water basin yang terdapat pada cooling tower. Setelah water basin terisi maka langkah selanjutnya yaitu menyalakan pompa CW, hal ini dimaksudkan agar air yang terdapat pada water basin dapat didistribusikan ke service tank, heat exchanger dan main engine. Setelah perangkat – perangkat tersebut teraliri air, langkah selanjutnya yaitu menyalakan engine dan pengujian dilaksanakan dengan memberikan variasi pembebanan pada engine. Akibat dari peningkatan pembebanan, temperatur engine meningkat menyebabkan beban pendinginan juga meningkat. Hal tersebut dapat menyebabkan kenaikan temperatur air pendingin. Operator sebagai pengendali proses selalu memantau temperatur air pendingin supaya tetap berada pada rentang temperatur 30 – 34°C (Standar temperatur dari BKI (Biro Klasifikasi Indonesia) adalah 32°C, dengan beberapa penyesuaian dari pihak bengkel, maka diberi toleransi ±2°C). Jika rentang temperatur yang sudah ditetapkan tercapai maka proses record data dapat dilakukan, namun apabila temperatur air melebihi standar yang sudah ditetapkan, maka operator ruang kendali perlu mengambil langkah menyalakan fan cooling tower untuk menurunkan temperatur air agar standar temperatur bisa tercapai baru kemudian bisa dilakukan record data dengan mencatatkannya pada lembar hasil pengujian yang diberikan owner engine. Langkah selanjutnya setelah record data yaitu analisa hasil, maksudnya dari data – data yang sudah diperoleh, dilakukan analisis untuk mengetahui performa engine. Jika hasil yang diperoleh belum memenuhi maka perlu dilakukan pengujian ulang.
Melalui penjelasan alur kerja sistem pendingin diatas, dapat diidentifikasi permasalahan yang terjadi pada proses tersebut. Permasalahan terletak pada temperatur air pendingin yang mana pada praktiknya seringkali tidak sesuai dengan standar yang sudah ditetapkan. Namun, dari hasil wawancara dengan pegawai bengkel, permasalahan tersebut seringkali diabaikan karena memang adanya keterbatasan kemampuan komponen yang ada di fasilitas tersebut. Padahal sistem pendinginan engine merupakan hal yang vital dan sangat mempengaruhi nilai performa engine yang dihasilkan.
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The process begins by turning on the HW pump. This is done with the aim of filling the water basin contained in the cooling tower. After the water basin is filled, the next step is to turn on the CW pump, this is so that the water contained in the water basin can be distributed to the service tank, heat exchanger and main engine. After the devices are filled with water, the next step is to start the engine and the test is carried out by varying the load on the engine. As a result of increased loading, the engine temperature increases causing the cooling load to increase as well. This can cause an increase in the temperature of the cooling water. The operator as the process controller always monitors the cooling water temperature so that it remains in the temperature range of 30 – 34°C (the temperature standard from BKI (Indonesian Classification Bureau) is 32°C, with some adjustments from the workshop, a tolerance of ±2°C is given) . If the set temperature range is reached, the data recording process can be carried out, but if the water temperature exceeds the predetermined standard, the control room operator needs to take steps to turn on the cooling tower fan to lower the water temperature so that the temperature standard can be achieved and then record data. by recording it on the test result sheet provided by the engine owner. The next step after the data record is the analysis of the results, meaning that from the data that has been obtained, an analysis is carried out to determine engine performance. If the results obtained do not meet the need for retesting.
Through the explanation of the cooling system workflow above, problems that occur in the process can be identified. The problem lies in the temperature of the cooling water which in practice is often not in accordance with the standards that have been set. However, from the results of interviews with workshop employees, these problems are often ignored because of the limited capabilities of the components in the facility. Whereas the engine cooling system is a vital thing and greatly affects the value of the resulting engine performance.
| Item Type: | Monograph (Project Report) |
|---|---|
| Uncontrolled Keywords: | sistem pendinginan, rangkaian sekunder, menara pendingin, PT. PAL Indonesia (Persero),marine diesel, cooling system, otomatization, cooling tower |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ174 Maintenance and repair of machinery |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Ridwan Prasetyo |
| Date Deposited: | 14 Aug 2021 15:19 |
| Last Modified: | 14 Aug 2021 15:19 |
| URI: | http://repository.its.ac.id/id/eprint/86102 |
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