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Jurnal Energi Dan Manufaktur
Published by Universitas Udayana
ISSN : 23025255     EISSN : 25415328     DOI : -
Core Subject : Science, Engineering,
Energy Industrial & Manufacturing Engineering
"Jurnal Energi dan Manufaktur" is a journal published by Department of Mechanical Engineering, University of Udayana, Bali since 2006. During 2006-2011 the journal's name was "Jurnal Ilmiah Teknik Mesin CAKRAM" (Scientific journal in mechanical engineering, CAKRAM). "Jurnal Energi dan Manufaktur" is released biannually on April and October, respectively. We invite authors to submit papers from experimental research, review work, analytical-theoretical study, applied study, and simulation, in related to mechanical engineering (energy, material, manufacturing, design) to be published through "Jurnal Energi dan Manufaktur".
Arjuna Subject : -
Articles 387 Documents
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Kekuatan Tarik dan Lentur pada Material Komposit Berpenguat Serat Jelatang I Gede Putu Agus Suryawan; NPG Suardana; I Ketut Suarsana; I Putu Lokantara; I Ketut Jaya Lagawa
Jurnal Energi Dan Manufaktur Vol 12 No 1 (2019)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (525.669 KB) | DOI: 10.24843/JEM.2019.v12.i01.p02

Abstract

Material komposit telah dikembangkan sebagai material alternatif pengganti logam dan kayu. Komposit dari matrik epoksi dengan penguat serat alam sedang dikembangkan, karena serat sintetis sulit terurai secara alami. Komposit dengan penguat serat alam lebih ramah lingkungan. Tanaman jelatang (stinging nettle) merupakan tanaman yang memiliki serat pada kulit batang. Tanaman jelatang tumbuh di seluruh wilayah Indonesia yang beriklim sedang. Di Bali banyak tumbuh di daerah Pupuan-Tabanan. Sifat yang khusus dari serat jelatang adalah kuat dan ringan. Penelitian ini bertujuan untuk mengetahui kekuatan tarik dan lentur komposit epoksi dengan penguat serat jelatang dengan fraksi volume 10%, 15%, dan 20% serat, perlakukan serat dengan NaOH 6% direndam selama 2 jam, panjang serat 5 mm dengan orientasi acak. Komposit dicetak dengan metode hand lay up. Hasil yang didapat dari penelitian ini adalah kekuatan tarik komposit mengalami kenaikan dengan bertambahnya fraksi serat. Nilai kekuatan lentur tertinggi didapatkan pada fraksi volume serat 20% sebesar 46,693 MPa. Composite material has been developed as an alternative material, it is substitute for metal and wood. Composites from epoxy with natural fiber reinforcement are being developed, because synthetic fibers are difficult to decompose naturally. Composite with natural fiber reinforcement is more environmentally friendly. Stinging nettles are plants that have fiber on the bark. Nettle plants grow in sub-district of Indonesia with temperate climates. In Bali many grow in the Pupuan-Tabanan area. The special properties of nettle fibers is strong and light. This study aims to determine the tensile and flexural strength of epoxy composites reinforcement nettle fibers with a volume fraction of fibers 10%, 15%, and 20%, treatment fibers with 6% NaOH, soaked for 2 hours, 5 mm fiber length with random orientation. Composites are product using the hand lay up method. The results obtained from this study are that the composite tensile strength increases with rise fiber fraction. The highest flexural strength value was obtained at 20% fiber fraction of 46.693 MPa.
Penerapan european foundation for quality management’s (efqm) excellence model pada sistem pengukuran kinerja jurusan Teknik Mesin Universitas Udayana I Made Dwi Budiana Penindra
Jurnal Energi Dan Manufaktur Vol 10 No 2 (2017): Oktober 2017
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak Globalisasi merupakan fenomena yang tidak dapat dihindari dalam tata kehidupan kita dimana persaingan antar negara semakin terbuka terutama pada bidang sumber daya manusia. Untuk menghadapi keadaan tersebut maka perguruan tinggi diharapkan menjadi pusat penyelenggaraan dan pengembangan pendidikan tinggi yang menghasilkan manfaat dan meningkatkan mutu kehidupan bermasyarakat, berbangsa dan bernegara. Jurusan Teknik Mesin adalah salah satu jurusan yang telah mendapatkan akreditasi A dari BAN PT dimana saat ini baru 20% jurusan yang terakreditasi di lingkungan Unuversitas Udayana. Didalam meningkatkan kinerja perlu kiranya dirancang suatu sistem pengukuran kinerja yang terintegrasi dimana saat ini Jurusan Teknik Mesin belum memiliki sistem pengukuran kinerja yang baik. Dalam menyempurnakan sistem pengukuran kinerja yang telah ada, maka akan dilakukan Analisis, perancangan dan implementasi sistem pengukuran kinerja dengan European Foundation for Quality Management’s (EFQM) Execellence Model dimana metode tersebut diintregasikan dengan beberapa metode yaitu Metode Objectives Matrix (OMAX), Integrated Performance Measurement Systems (IPMS), dan Analytical Hierarcy Process (AHP) pada Jurusan Teknik Mesin Universitas Udayana. Langkah-langkah atau rincian dari metode penelitian yang diharapkan adalah mengikuti tahapan sebagai berikut : Pemilihan Metode Pengukuran Produktivitas, Jenis dan Metode Pengumpulan Data, Identifikasi Indikator-Indikator atau Kriteria Produktivitas yang Akan Diukur, Pemberian Bobot Dari Masing-Masing KPI Yang Diukur, Pengolahan Data Atau Pengukuran Kriteria Produktivitas, Evaluasi Produktivitas. Dari hasil penelitian dapat disimpulkan bahwa Implementasi Sistem Pengukuran Kinerja dengan European Foundation for Quality Management’s (EFQM) Execellence Model yang diintegrasikan Integrated Performance Measurement Systems (IPMS) dan Metode Objectives Matrix (OMAX) memiliki perbedaan pandangan pada penentuan stakeholder requirement, dari 40 stakeholder requirement dijabarkan menjadi 15 KPI. Implementasi pada semester genap 2014/2015 menunjukkan peningkatan sebesar 83,92 % dari periode sebelumnya dengan Indeks Performance Indicator sebesar 773,35. Kata kunci: Pengukuran kinerja, European Foundation for Quality Management’s (EFQM) Execellence Model, Metode Objectives Matrix (OMAX), Integrated Performance Measurement Systems (IPMS), dan Analytical Hierarcy Process (AHP) Abstract Globalization is a phenomenon that can not be avoided in the governance of our lives where competition between countries become more open, especially in the field of human resources. To deal with the situation, the college is expected to be the center of the implementation and development of higher education that generate benefits and improve the quality of life of society, nation and state. Department of Mechanical Engineering is one of the departments that have earned accreditation from BAN PT where currently only 20% of accredited departments in the university. In order to improve its performance, it would need to design an integrated performance measurement system which is now the Department of Mechanical Engineering has not had a good performance measurement system yet. Enhancing performance measurement systems that already exist, analysis, design and implementation of performance measurement system will be done with the European Foundation for Quality Management's (EFQM) excellence model wherein the method is integrated by several methods, namely Methods Objectives Matrix (OMAX), Integrated Performance Measurement Systems (IPMS), and Hierarcy Analytical Process (AHP) in the Department of Mechanical Engineering University of Udayana. Steps or details of the research methods to be expected is as following steps: Selection Method of Measuring Productivity, Types and Data Collection Methods, Identification Indicators or the Criterion productivity will be measured, Giving Weights From Each KPI The Measured, Data Processing or Measurement Criteria Productivity, Productivity Evaluation. The results of this research concluded the implementation of Performance Measurement System with the European Foundation for Quality Management's (EFQM) excellence model integrated Integrated Performance Measurement Systems (IPMS) and Methods Objectives Matrix (OMAX) have differing views on the determination of stakeholder requirements, from 40 stakeholder requirements outlined to 15 KPI. Implementation of the second semester of 2014/2015 showed an increase of 83.92% from the previous period with Performance Indicator index of 773.35 Keywords: Productivity Measurement, European Foundation for Quality Management's (EFQM) excellence model integrated Integrated Performance Measurement Systems (IPMS) and Methods Objectives Matrix (OMAX), dan Analytical Hierarcy Process (AHP)
Analysis of Cutting Tool Modification Effect toward Force, Power and Temperature at Cutting of Material St 42 I Gusti Komang Dwijana
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Until now, research by using of a standard cutting tool at lathe process is still become a subject of many studies in order to reduce of the force, cutting power and temperature. However, there are no satisfactory results yet as expected. In order to participate in overcoming these problems, it is conducted a study on the cutting process by using of standard cutting tool which is modified become double-edged chisel cutting tool. Variables selected in the machining process are cutting speed, feed and depth of pieces motion, due to these variables influence the change in style, cutting power and temperature will be researched. Research procedure was conducted by measuring the amount of cutting force, machining power and cutting temperature in each process multiple pieces of lathe with double-edged chisel cutting tool and then compared with using cutting tool standard. Data collected use of the data acquisition system so that the results obtained can be directly read on a computer screen. The statistical testing to be done is using a procedure paired-samples T test to determine whether use of double-edged chisel cutting tool (modified) will be better when compared with using of standard cutting tool. The result of research show that by use of double-edged chisel cutting tool can be obtained lower of the force, cutting power and temperature.
Analisa Kekuatan Sambungan Pipa Baja Karbon dan Besi Cor Berbasis Teknologi Las Gesek (Friction Welding) Nur Husodo Nur Husodo; Budi Luwar S1 Budi Luwar S1; Hagi Astono P. Hagi Astono P.; Sri Bangun S. Sri Bangun S.; Rachmad Hidayat Rachmad Hidayat
Jurnal Energi Dan Manufaktur Vol 8 No 2 (2015): Oktober 2015
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak :Adanya kesulitan yang akan terjadi manakala dilakukan proses penyambungan dua buah logam yang berbeda komposisi. Namun ada alternative metode proses penyambungan logam baja yang berbeda komposisi dengan metode las gesek. Selain itu metode las gesek ini mempunyai banyak keunggulan antara lain waktu proses cepat, tidak perlu logam pengisi, panas yang terjadi tidak sampai logam mencair, panas yang terjadi tidak terlalu tinggi juga mudah diterapkan karena dapat memanfaatkan mesin perkakas. Oleh karena itu perlu dilakukan proses penyambungan dengan metode las gesek untuk alternative proses pembuatan produk stang sepeda motor.. Penelitian dilakukan dengan memvariasi tekanan tempa sebesar 375, 437,5 dan 500 kgf/cm2, tekanan gesek 62,5 kgf/cm2 dan durasi waktu gesek 120 detik. Sampel uji yang dihasilkan dilakukan pengujian struktur mikro dengan metallografi sedangkan sifat mekanik dilakukan dengan pengujian kekerasan dan kekuatan tarik. Analisa dilakukan untuk mengetahui peluang las gesek dipakai sebagai alternative proses produksi produk stang sepeda motor. Dapat ditarik kesimpulan bahwa metode las gesek dapat digunakan menyambung dua buah logam baja yang berbeda kompisi yaitu pipa baja karbon rendah dengan besi cor. Kekuatan las akan meningkat ketika tekanan tempa juga meningkat. Kekuatan sambungan tertinggi sebesar 546,66 N/mm2. Kata kunci: las gesek, pipa baja karbon rendah, besi cor, tekanan tempa, tekanan gesek.Abstract :The difficulties that will occur when the process of joining two pieces made of different metal compositions. However, there are alternative methods of process connection of different steel metal composition with friction welding method. Besides this friction welding method has many advantages such as faster processing time, do not need filler metal, the heat does not occur until the metal melts, heat is happening is not too high is also easy to implement because it can take advantage of machine tools. Therefore, it is necessary to the process of switching to an alternative method for friction welding manufacturing process motorcycle handlebar .. The study was conducted with three variations of pressure wrought by 375, 437.5 and 500 kgf / cm 2, while the frictional pressure of 62.5 kgf / cm 2 and the length of time string 120 seconds. The resulting test samples tested microstructure with metallografi done while the mechanical properties hardness testing and tensile strength. The analyzes were performed to determine the chances of friction welding is used as an alternative production process motorcycle handlebar. It can be deduced that the friction welding method can be used to connect two pieces of metal of different steel compositions, namely low carbon steel pipe with cast iron. Weld strength will increase when the pressure forging also increased. The highest weld strength was 546.66 N / mm2. . Keywords: friction weldingl, low carbon steel pipe, cast iron, forging pressure, friction pressure
Analisis Koefisien Absorpsi Bunyi Pada Komposit Penguat Serat Alam Dengan Menggunakan Alat Uji Tabung Impedansi 2 Microphone Cok Istri Putri Kusuma Kencanawati; I Ketut Gede Sugita; I Gusti Ngurah Priambadi
Jurnal Energi Dan Manufaktur Vol 9 No 1 (2016): April 2016
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Abstrak:Dalam perambatannya gelombang bunyi dapat di halangi dengan menggunakan suatu medium yang memiliki sifat-sifatkedap suara, sehingga energi yang ditransmisikan akan mampu dikurangi/dihambat oleh medium tersebut. Salah satumetode yang dapat dipergunakan untuk mengetahui kemampuan peredaman (koefisien absorpsi) suatu mediumterhadap gelombang bunyi yang datang dapat diketahui dengan menggunakan Tabung Impedansi 2 Microphone.Sedangkan sebagai mediumnya adalah panel komposit. Mengingat dalam perkembangan ilmu bahan saat ini banyak digunakan komposit dengan penguat serat alam, dan salah satu sifat yang dikaji adalah sifat akustiknya. Kajian ini lebihmenitik beratkan sifat akustik komposit berpenguat serat alam, mengingat selama ini banyak serat alam yang terbuangpercuma menjadi limbahsehingga mencemari lingkungan. Jenis-jenis serat alam yang digunakan sebagai penguatantara lain : serat serabut kelapa, serat jerami, serat batang pisang, serat nenas, serat kapuk dan serat batang kelapasawit, sedangkan frekuensi pengukuran koefisien absorpsi terhadap medium ini berkisar anatra 200 hz sampai dengan1400 hz, dengan ketebalan spesiemn uji antara 2 mm sampai dengan 4 mmdengan menggunakan metode pengujianTabung impedansi 2 mikrophone, sesuai dengan standart ISO 10534-2:1998 and American Standart forTestingMaterials (ASTM) E1050-98. Dalam kajian ini diperoleh kesimpulan bahwa pada frekuensi rendah koefisienabsorpsi bahan cukup tinggi antara 0,4 sampai dengan 0,6 dan kemampuan serap bunyi ini akan menurun denganmeningkatnya frekuensi, sedangkan pengaruh ketebalan bahan juga mempengaruhi sifat akustiknya.Kata kunci: komposit, serat alam, koefisien absorpsi, tabung impedansiAbstract:In the propagation of sound waves can be prevented by using a medium that has properties soundproofed, so that thetransmitted energy to be able to be reduced / inhibited by the medium. One method that can be used to determine theability of damping (absorption coefficient) of a medium to a sound wave that comes can be determined by using theImpedance Tube 2 Microphone. Meanwhile, as the medium is a composite panel. Given the development of materialsscience is currently widely used composites with natural fiber amplifier, and one trait studied is its acoustic properties.This study focuses Composite acoustic properties of natural fibers, considering that many natural fiber is wasted intolimbahsehingga pollute the environment. The types of natural fibers used as reinforcement include: fiber coconut fiber,fiber straw, fiber trunks of banana, pineapple fiber, cotton fiber and fiber rod palm oil, while the frequency ofmeasurement of the absorption coefficient of the medium range anatra 200 hz to 1400 hz, with test spesiemn thicknessbetween 2 mm to 4 mmdengan impedance tube testing using two microphones, according to standard ISO 10534-2:1998 and American standard for TestingMaterials (ASTM) E1050-98. In this study we concluded that low-frequencyhigh enough absorption coefficient of materials between 0.4 up to 0.6 and the sound absorption capability will decreasewith increasing frequency, while the influence of the thickness of the material also affects its acoustic properties.Keywords: composites, natural fibers, the absorption coefficient, impedance tube
Unjuk Kerja Destilasi Air Energi Surya I Gusti Ketut Puja; FA. Rusdi Rusdi Sambada
Jurnal Energi Dan Manufaktur Vol 5 No 1 (2012): Oktober 2012
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Clean water is daily needs for society, especially for drinking and cooking. Existing water sources oftenalready contaminated with dirt, salt (sea water), heavy metals, bacteria or other harmful materials. Thewater in this condition can be detrimental to health if used for drinking or cooking, hence the water has tobe rarefied first. There are many ways to purify contaminated water, one way is by distillation. Distillationprocess requires heat to evaporate the contaminated water before condensed and produce clean water.Thermal energy for distillation process can come from many sources, one of which is solar energy. Thepurpose of this study is to investigate the performance difference between solar powered water distillationthat uses parabolic collector and reflector with solar powered water distillation without the use of paraboliccollector and reflector (basic form). Distillated water will be tested in the laboratory to determine whetherthe water quality qualifies as drinking water or not after distillation process. Equipment which used in thisstudy consisted of contaminated water tanks, distillation apparatus and distillated water storage. Distillationapparatus has a length of 1 meter and 0.5 meters wide. There are three variations on the distillationapparatus used i.e. distillation with reflector, distillation with parabolic collector and distillation withoutreflector and collector (basic form). Distillation appliance is equipped with water depth indicator. Waterdepth inside the distillation varied i.e. 5 mm, 7.5 mm, and 10 mm. The results showed a maximum ofdistilled water produced is 0.850 liter in 2 hours with an average efficiency of 49.2% produced by thedistillation using reflector with 5 mm water depth. Maximum of distilled water yield with 10 mm water depthis 0.20 liter in 2 hours produced by distillation using parabolic collectors. Laboratory test stated that qualityof distilled water can be accepted as drinking water.
Analisis penggunaan media pendingin pada proses pendinginan perunggu gamelan Bali I Ketut Gede Sugita; IGN Priambadi; Cok Istri Putri Kusuma K
Jurnal Energi Dan Manufaktur Vol 2, No.1 Juni 2007
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

The process of making Bali Music Instrument (Gamelan Bali) included moulding, forging, adjustment of harmony (called sruti), and finally finishing process. In commonly application, there were some different media that used in the cooling process, however generally water was used as cooling media. The cooling media has an important effect on mechanical property of the materials. The aim of this research is to investigate the effect of cooling media on mechanical properties of Gamelan Bali. The specimens are the casting product between copper and tin with compotition 80%Cu – 20%Sn. The treatment on specimen comprised machining process, heating to 500°C in an electrical furnace followed by 60 minute holding time. The cooling process was conducted with the cooling media of water, oil, and air, respectively. The crack toughness testing was then applied by using an ASTM E 399-90 standard test machine. The results showed that the cooling with water resulted in the highest crack toughness; on the contrary the air resulted in the lowest.
Koefisien Perpindahan Panas dan Kerugian Jatuh Tekanan Aliran di Dalam Pipa Rr. Sri Poernomo Sari; T. Aswinsyah Hassan; D. Saputra; R. Malau
Jurnal Energi Dan Manufaktur Vol 7 No 2 (2014): Oktober 2014
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Perpindahan panas dan kerugian jatuh tekanan di dalam sistem perpipaan sangat pentingdiketahui untuk menentukan kapasitas tenaga pompa dalam penggunaan di dunia industri. Pipabulat bentuk lilitan spiral terbuat dari tembaga dialiri oleh fluida panas didalamnya, dimasukkan kedalam bejana dengan temperatur air konstan pada 0°C. Tujuan penelitian mengukur nilai koefisienperpindahan panas dan kerugian jatuh tekanan pada lilitan pipa. Variasi temperatur air panas danvariasi kecepatan aliran di dalam pipa sebagai variabel pengambilan data. Nilai variasi koefisienperpindahan panas dan kerugian jatuh tekanan menentukan unjuk kerja yang optimal dari sistemini.Kata kunci: koefisien perpindahan panas, kerugian jatuh tekanan, pipa lilitan spiralHeat transfer and pressure drop losses in the piping system is very important to be known for thedetermination of the capacity of pump power in use in the industrialized world. Round pipe with aspiral coil made of copper fed by hot fluid in it is introduced into a vessel with a constant watertemperature at 0 ° C. The purpose of the research is to measure the coefficient of heat transferand pressure drop losses in the winding pipe. The variation temperature of Hot water and variationsin flow velocity in the pipe as variable data retrieval. The value of the variation coefficient of heattransfer and pressure drop loss determine optimal performance of this system.Keywords: heat transfer coefficient, pressure drop losses, spiral coil pipe
Studi Sifat Impak Ketahanan Aus dan Koefisien Gesek Bahan Komposit Arang Limbah Serbuk Gergaji Kayu Glugu Dengan Matrik Epoxy I Gusti Ketut Puja
Jurnal Energi Dan Manufaktur Vol 4, No.2 Oktober 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Waste of sawdust materials of coconut wood is potential to be used as engineering materials of technology products, such asbrake pad for light vehicle. Some important properties of materials to be used as a brake pad is wear resistance, impactstrength and the friction coefficient. This study aims to investigate the coefficient of friction, wear and impact properties ofcomposite materials of coconut wood charcoal sawdust with epoxy matrix. Coconut wood charcoal sawdust produced attemperatures varies from 200, 300, 400 and 500 degrees Celsius for 2 hours respectively. The charcoal was tested for carboncontent. The charcoal with high carbon content then is used as filler composites. Composite is manufactured by hydraulic presscast method with content of filler (particle) varies from 28, 37, 46 and 55 percent (v/v). Testing was conducted on the coefficientof friction, wear, and Charpy impact. The results are verified with the properties of the commercial brake pad. Charcoal isproduced at a temperature of 200 and 300 degrees Celsius has the highest carbon content (91.98% and 89.64%). Compositefriction coefficient increases with increasing particle content. The largest friction coefficient (0.445) occurred in the compositewith particles content about 55 percent (v/v). Composite friction coefficient increases with increasing content of particleswhere the value is greater than the commercial brake pad (0.34). Composite with particle content of 46 percent has the lowestspecific wear rate, about 4.13 mm2/kg (the best wear resistance). This value still higher than the commercial brake pad (2.04mm2/kg). Composite with particles content of 37 percent has the fracture energy about 0.27 joules, and the thoughness about2.87 kJ/mm2. Composite with particle content of 37 percent was likely can as a brake pad, but the wear resistance still lowerthan the commercial products
Experimental Analysis of Volume Flow Rate in Water Chiller Type of Central AC System IGAB Wirajati
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

Central AC chilled water system is an air conditioning system that has cooling ability in more than one room. The system has two cycles consist of primary and secondary cycles. When primary cycle works, the refrigerant is used as a working fluid while in the secondary cycle process, the water is used as working fluid. To determine the heat absorbed by water, it can be done by analyzing NTU (Number of Transfer Unit) of the water chiller system. The variation of the chilled water volume rate applied in this research was from 13 l/min to 5 l/min, with the interval of 0.5 l/min. As a result, it was founded that the maximum value of NTU was 2.01, at chilled water volume rate of 12 l/min. Below that chilled water volume rate, values of NTU would decrease and stable. It can be concluded that the volume rate of chilled water influenced the value of NTU in the FCU (Fan Coil Unit) of the water chiller AC system.

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