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PERBANDINGAN PERSAMAAN KOEFISIEN PERPINDAHAN KALOR KESELURUHAN UNTUK PERANCANGAN PENUKAR KALOR Indartono, Yuli Setyo; Pasek, Ari Darmawan
Mesin Vol 11, No 2 (1996)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.967 KB)

This paper concerns with comparison of various heat transfer equations which can be used in the design of a shell and tube heat exchanger for combustion gas and air. A computer programme which also includes the thermodynamics properties of the gas and air was made for that purpose. Characteristics of the heat exchangers are then compared with the existing industrial heatexchanger. It was found that the overall heat transfer coefï¬cient equation proposed by Babcock & Wilcock gives the best results .

Particle Size Distribution and Rheolog ical Characteristic of Trimethylolethane Treated by Cationic Surfactant Indartono, Yuli Setyo; Usui, Hiromoto; Suzuki, Hiroshi; Tanaka, Satoshi; Nakayama, Kousuke; Komoda, Yoshiyuki; Itotagawa, Tetsu
Mesin Vol 22, No 2 (2007)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (667.448 KB)

Trimethylolethane (TME) trihydrate particle suspended in water is a proper substance for latent heat transportation in cooling systems, since it has high heat transfer and thermal capacity. Additives, oleyl bishydroxyethyl methyl ammonium chloride as surfactant and sodium salicylate as counter-ion, were added into TME slurry to reduce its friction factor. Aditives influence on particle size distribution and rheological characteristic of TME are investigated in this study. It is found that the additives do not influence particle size at crystallization point, but they clearly inhibit further particle growth. By increasing molar ratio of counter-ion to surfactant, the particles do not grow at all. Increasing TME concentration reduces the apparent viscosity of TME with surfactant and increases critical shear rate for Shear Induced Structure (SIS) occurrence. By connecting this SIS phenomenon with previous data, it is found that there is a relation between the SIS and drag reduction for this drag-reducing TME suspension system.

STUDY ON APPLICATION OF DRAG-REDUCING TRIMETHYLOLETHANE SLURRY IN DISTRICR COOLING SYSTEM Usui, Hiromoto; Suzuki, Hiroshi; Komoda, Yoshiyuki; Indartono, Yuli Setyo
Mesin Vol 23, No 1 (2008)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5406.988 KB)

Trimethylolethane (TME) trihydrate slurry is a proper phase-change material for latent heat transportation in cooling systems since it has excellence heat transfer performance and high thermal capacity. Additives, oleyl bishydroxyethyl methyl ammonium chloride (as surfactant) and sodium salicylate (as counter-ion), were used as drag-reducer substance. These additives not only induce drag reduction in TME slurry, but also control particle growth and agglomeration. In this study, energy saving estimation of drag-reducing TME slurry application in district cooling system is invesitgated. It is found that drag-reducing TME slurry gives remarkable pumping power suppresion in the district cooling system. To maintain high performance of heat exchangers, heat transfer enhancement technique may be needed in those exchangers.

Peningkatan Effisiensi Elektrik Modul Surya Menggunakan Bahan Berubah Fasa dan Maximum Power Point Tracking (MPPT) Hidayat, Fery; Indartono, Yuli Setyo; Suwono, Aryadi
Jurnal Rekayasa Hijau Vol 1, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Institut Teknologi Nasional

ABSTRAKPemanfaatan Modul Surya (Photovoltaic-PV) untuk membangkitkan daya elektrik terkendala oleh efisiensi yang masih rendah. Efisiensi elektrik tersebut juga akan turun seiring dengan peningkatan temperatur sel PV selama PV beroperasi. Penggunaan Crude Palm Oil (CPO) sebagai bahan berubah fasa (Phase Change Material-PCM) bertujuan untuk menghambat kenaikan temperatur sel-PV, sedangkan untuk mendapatkan daya maksimum dengan menggunakan Maximum Power Point Tracking (MPPT). Jurnal ini memuat hasil pengujian penggunaan PCM dan MPPT untuk meningkatkan efisiensi elektrik PV, dan dari hasil pengujian menunjukkan bahwa kombinasi antara PCM dan MPPT pada PV mampu meningkatkan efisiensi PV secara sigifikan dari 9,64% menjadi 16,27%.Kata kunci: Modul surya (PV), Bahan Berubah Fasa (PCM), Maximum Power Point Tracking (MPPT). ABSTRACT Utilization of Photovoltaic-PV to generates electric power is constrained by low efficiencies of the PV system. The electrical efficiensies will decrease by increasing PV cells temperature during operations. Crude Palm Oil as Phase Change Material (PCM) are used to prevent temperature rising of PV cells, wherease to get the maximum power of PV by using Maximum Power Point Tracking (MPPT). This journal coutains the result of testing the use of PCM and MPPT can improve electrical efficienciy of PV, and from the test result showed used both PCM and MPPT on PV is able to improve electrical efficiency around 9.64% to 16.27 %.Keywords: Photovoltaic-P), Phase Change Material (PCM), Maximum Power Point Tracking (MPPT).

PERBANDINGAN PERSAMAAN KOEFISIEN PERPINDAHAN KALOR KESELURUHAN UNTUK PERANCANGAN PENUKAR KALOR Yuli Setyo Indartono; Ari Darmawan Pasek
Mesin Vol. 11 No. 2 (1996)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

This paper concerns with comparison of various heat transfer equations which can be used in the design of a shell and tube heat exchanger for combustion gas and air. A computer programme which also includes the thermodynamics properties of the gas and air was made for that purpose. Characteristics of the heat exchangers are then compared with the existing industrial heatexchanger. It was found that the overall heat transfer coefï¬cient equation proposed by Babcock & Wilcock gives the best results .

Particle Size Distribution and Rheolog ical Characteristic of Trimethylolethane Treated by Cationic Surfactant Yuli Setyo Indartono; Hiromoto Usui; Hiroshi Suzuki; Satoshi Tanaka; Kousuke Nakayama; Yoshiyuki Komoda; Tetsu Itotagawa
Mesin Vol. 22 No. 2 (2007)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Trimethylolethane (TME) trihydrate particle suspended in water is a proper substance for latent heat transportation in cooling systems, since it has high heat transfer and thermal capacity. Additives, oleyl bishydroxyethyl methyl ammonium chloride as surfactant and sodium salicylate as counter-ion, were added into TME slurry to reduce its friction factor. Aditives influence on particle size distribution and rheological characteristic of TME are investigated in this study. It is found that the additives do not influence particle size at crystallization point, but they clearly inhibit further particle growth. By increasing molar ratio of counter-ion to surfactant, the particles do not grow at all. Increasing TME concentration reduces the apparent viscosity of TME with surfactant and increases critical shear rate for Shear Induced Structure (SIS) occurrence. By connecting this SIS phenomenon with previous data, it is found that there is a relation between the SIS and drag reduction for this drag-reducing TME suspension system.

STUDY ON APPLICATION OF DRAG-REDUCING TRIMETHYLOLETHANE SLURRY IN DISTRICR COOLING SYSTEM Yuli Setyo Indartono; Hiromoto Usui; Hiroshi Suzuki; Yoshiyuki Komoda
Mesin Vol. 23 No. 1 (2008)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Trimethylolethane (TME) trihydrate slurry is a proper phase-change material for latent heat transportation in cooling systems since it has excellence heat transfer performance and high thermal capacity. Additives, oleyl bishydroxyethyl methyl ammonium chloride (as surfactant) and sodium salicylate (as counter-ion), were used as drag-reducer substance. These additives not only induce drag reduction in TME slurry, but also control particle growth and agglomeration. In this study, energy saving estimation of drag-reducing TME slurry application in district cooling system is invesitgated. It is found that drag-reducing TME slurry gives remarkable pumping power suppresion in the district cooling system. To maintain high performance of heat exchangers, heat transfer enhancement technique may be needed in those exchangers.

Peningkatan Effisiensi Elektrik Modul Surya Menggunakan Bahan Berubah Fasa dan Maximum Power Point Tracking (MPPT) Fery Hidayat; Yuli Setyo Indartono; Aryadi Suwono
Rekayasa Hijau : Jurnal Teknologi Ramah Lingkungan Vol 1, No 2 (2017)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/jrh.v1i2.1636

ABSTRAKPemanfaatan Modul Surya (Photovoltaic-PV) untuk membangkitkan daya elektrik terkendala oleh efisiensi yang masih rendah. Efisiensi elektrik tersebut juga akan turun seiring dengan peningkatan temperatur sel PV selama PV beroperasi. Penggunaan Crude Palm Oil (CPO) sebagai bahan berubah fasa (Phase Change Material-PCM) bertujuan untuk menghambat kenaikan temperatur sel-PV, sedangkan untuk mendapatkan daya maksimum dengan menggunakan Maximum Power Point Tracking (MPPT). Jurnal ini memuat hasil pengujian penggunaan PCM dan MPPT untuk meningkatkan efisiensi elektrik PV, dan dari hasil pengujian menunjukkan bahwa kombinasi antara PCM dan MPPT pada PV mampu meningkatkan efisiensi PV secara sigifikan dari 9,64% menjadi 16,27%.Kata kunci: Modul surya (PV), Bahan Berubah Fasa (PCM), Maximum Power Point Tracking (MPPT). ABSTRACT Utilization of Photovoltaic-PV to generates electric power is constrained by low efficiencies of the PV system. The electrical efficiensies will decrease by increasing PV cells temperature during operations. Crude Palm Oil as Phase Change Material (PCM) are used to prevent temperature rising of PV cells, wherease to get the maximum power of PV by using Maximum Power Point Tracking (MPPT). This journal coutains the result of testing the use of PCM and MPPT can improve electrical efficienciy of PV, and from the test result showed used both PCM and MPPT on PV is able to improve electrical efficiency around 9.64% to 16.27 %.Keywords: Photovoltaic-P), Phase Change Material (PCM), Maximum Power Point Tracking (MPPT).

Study of an Indirect Injection Diesel Engine Using Pure Coconut Oil, Pure Tamanu Oil and B-20 as Fuel for Smart Microgrid Applications. Part I: Laboratory Testing Iman Kartolaksono Reksowardojo; Aji Ardiansyah; Tobat Martin Leonardo; Dini Permatasari; Yuli Setyo Indartono; Fariza Almira Ghany
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.2

Smart Microgrid (SMG) is a hybrid system based on renewable energy which can use biofuel, taking advantage of local resources, as one of its energy sources. This study was conducted to determine the effect of using pure tamanu oil and pure coconut oil on engine performance, emissions, as well as their effects on particular components before and after endurance testing. The experiments were done using a diesel engine at speeds of 2200 rpm. In this study, engine performance and emission tests were done before and after the accelerated endurance tests, with loads of 800 W to 4000 W. The dimensions of the fuel injector nozzle needle and plunger pump were also measured. The fuel performance and emissions results showed slight differences between, before, and after endurance testing. The emissions tests also showed that the two biofuels, especially tamanu, are cleaner than B-20 and have better dimensional measurement results, compared to B-20. Therefore, these biofuels are feasible for replacing B-20, as shown in laboratory testing

Study of an Indirect Injection (IDI) Diesel Engine Using Pure Coconut Oil, Pure Tamanu Oil and B-20 for Smart Microgrid Applications Part II: Pilot Testing Iman Kartolaksono Reksowardojo; Aji Ardiansyah; Tobat Martin Leonardo; Dini Permatasari; Yuli Setyo Indartono; Fariza Almira Ghany
Mesin Vol 29 No 1 (2023)
Publisher : Faculty of Mechanical and Aerospace Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/MESIN.2023.29.1.3

The Smart Microgrid (SMG) can be used as a solution to overcome problems with electrical distribution on remote islets. The SMG system allows for a combination of conventional and renewable energy for power generation. Biofuel was chosen as a renewable energy source because of its abundant availability and ease of mobilization. This study examined the performance of B-20, Pure Tamanu Oil (PTO), and Pure Coconut Oil (PCO) in an IDI diesel engine that acts as a backup for SMG systems in the Karimunjawa Islands. The entire SMG system consists of: diesel engine, stabilizer, inverter, PV, batteries, ice maker, and a channel to the electrical grid. The results show that PTO has the highest value of thermal efficiency, that of 17.38%, but with a higher BSFC of 0.54 kg/kWh when compared to B-20 usage (14.69% and 0.51 kg/kWh). According to performance test results, their performance can be compared to the first part of this twin paper, which is laboratory testing, with a range of 2400-3200 W loads. Therefore, it can be said that biofuels are feasible for replacing B-20, as shown in pilot testing.

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