Eky Novianarenti - Academia.edu (original) (raw)

Papers by Eky Novianarenti

Infotekmesin

This article discusses a preliminary study of developing a paddlewheel aerator for shrimp ponds u... more This article discusses a preliminary study of developing a paddlewheel aerator for shrimp ponds using an integrated intelligent aquaculture system to support intensification. Two paddlewheel aerators with different phases have been successfully installed. The test was carried out on two different types of motors, which were intended to comprehend the performance of every motor on a paddlewheel aerator. The ratio of the speed values for a single-phase motor was 102 rpm and for a 3-phase motor was 110.3 rpm. The data from the performance observation of the aeration wheel motor can be viewed via a smartphone using a website application. The data displayed from the observations are in the form of data on voltage, current, frequency, power, power factor, and the power generated by the pinwheel motor. The test results show the performance of the aeration wheel motor that works under normal conditions with an average measurement error of 0.23%, below the acceptable error limit of 0.5%. Thi...

Journal of Mechanical Engineering, Science, and Innovation

Axial fans are widely applied in the industrial sector. Axial fans are used for ventilation syste... more Axial fans are widely applied in the industrial sector. Axial fans are used for ventilation systems and other cooling systems. The blade design of the axial fan requires an airfoil study. Unfortunately, there are not many articles that discuss in detail about airfoils, especially on noise and vibration that can have an impact on axial fan performance using computational fluid methods or software. This study performs axial fan analysis using computational methods with ANSYS Fluent, Static Structural, Modal and Harmonic Response software to obtain the values of stress, vibration and fluid flow. The experimental design used is using NACA 1412, 4142, and 6412 airfoils on the tip with variations in angles of 60, 74, and 80. While on the hub uses NACA 9312, 9412, and 9512 airfoils with angle variations of 20, 30, and 60 and simulated to find the value of vibration and stress analysis. The 3D axial fan design is imported into the ANSYS Fluent, Static Structural, Modal and Harmonic Response...

Mayoritas nelayan tradisional menggunakan tempat penyimpanan sederhana seperti kotak styrofoam, p... more Mayoritas nelayan tradisional menggunakan tempat penyimpanan sederhana seperti kotak styrofoam, peti kayu, dan palka sederhana dengan media pendinginan es balok. Penyimpanan tersebut belum memiliki insulasi yang baik sehingga berakibat pada kualitas ikan yang menurun. Belum lagi keluhan terkait cepat rusaknya box ikan yang terbuat dari styrofoam tersebut. Kekurangan kotak ikan berbahan styrofoam adalah sangat mudah rusak dan berlumut. Beberapa penelitian memberikan solusi untuk menginsulasi palka dengan beberapa bahan insulasi seperti polyurethane, sekam padi, aluminium dan sebagainya. Penelitian ini bertujuan untuk menurunkan laju perpindahan panas pada palka ikan kapal 7GT dengan variasi kevakuman dan persentase es terhadap ikan. Konstruksi insulasi dibuat sedemikian hingga dengan variasi fiberglass dan polyurethane dengan ketebalan tertentu diharapkan dapat meningkatkan masa pemakaian fish hold menjadi lebih lama

Seminar Nasional Sains dan Teknologi Terapan V, Oct 17, 2017

Novateur Publication, Apr 22, 2021

Jurnal Teknik ITS, 2013

Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari ... more Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari energi alternatif yang potensial untuk dikonversikan menjadi energi listrik. Hal ini yang melatarbelakangi suatu simulasi energi gelombang dengan penggerak sistem bandul yang ditempatkan di dalam sebuah tangki. Tugas akhir ini difokuskan pada respon kecepatan gerak bandul dengan variasi massa dan panjang bandul untuk memperoleh energi maksimal dari sebuah bandul yang berosilasi secara harmonik terhadap goncangan air. Diawali dengan pemodelan matematis pada sistem ponton-bandul dengan tiga derajat kebebasan kemudian dilakukan analisa terhadap respon gerakan ponton. Tujuannya adalah untuk mendapatkan satu model yang paling optimum. Hasil dari analisa tersebut menunjukkan bahwa nilai kecepatan tertinggi didapatkan pada amplitudo 6cm dengan panjang lengan bandul 9 cm dan massa bandul 300 gr yaitu sebesar 783,8x10-3 m/s dan kecepatan minimum didapatkan pada panjang lengan bandul 17 cm dan mas...

Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari ... more Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari energi alternatif yang potensial untuk dikonversikan menjadi energi listrik. Hal ini yang melatarbelakangi suatu simulasi energi gelombang dengan penggerak sistem bandul yang ditempatkan di dalam sebuah tangki. Tugas akhir ini difokuskan pada respon kecepatan gerak bandul dengan variasi massa dan panjang bandul untuk memperoleh energi maksimal dari sebuah bandul yang berosilasi secara harmonik terhadap goncangan air. Diawali dengan pemodelan matematis pada sistem ponton-bandul dengan tiga derajat kebebasan kemudian dilakukan analisa terhadap respon gerakan ponton. Tujuannya adalah untuk mendapatkan satu model yang paling optimum. Hasil dari analisa tersebut menunjukkan bahwa nilai kecepatan tertinggi didapatkan pada amplitudo 6cm dengan panjang lengan bandul 9 cm dan massa bandul 300 gr yaitu sebesar 783,8x10-3 m/s dan kecepatan minimum didapatkan pada panjang lengan bandul 17 cm dan mas...

VANOS Journal of Mechanical Engineering Education, 2018

There are many important reviews about the flow characteristics in the body of the racing bike he... more There are many important reviews about the flow characteristics in the body of the racing bike helmet caused by the relative motion of the air along the Trailing Edge shape. The lines formed in such a way in the speed field will form a streamline stream so that the lines are in line with the flow at each point in the flow field. Thus, the streamline will form a pattern of airflow around the helmet. This aerodynamic characteristic study was performed on time meter helmet body visualized numerically using Computational Fluid Dynamics (CFD) with Solid Work Flow Simulation software. With variation of Trailing Edge 25 mm, 75 mm, 125 mm. Urgency research about helm time trial is believed to provide information about the flow that occurred. The result shows that the drag coefficient reduction that occurs on the cut variation of 75 mm compared with other variations on the Reynolds number 1.16 x 105 of 0.395.

JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK), 2018

Kota Surabaya merupakan salah satu kota yang terkenal dengan sebutan kota banjir ketika musim huj... more Kota Surabaya merupakan salah satu kota yang terkenal dengan sebutan kota banjir ketika musim hujan tiba dan memiliki sungai yang kotor dipenuhi sampah. Beberapa tahun ini, pemerintah kota Surabaya mulai membenahi dan menata serta membuat program – program yang bertujuan untuk merdeka dari sampah. Salah satu usaha yang dilakukan Pemerintah kota Surabaya untuk mengatasi banjir dan penumpukan sampah yaitu menciptakan program bank sampah di beberapa wilayah. Tujuan dari pengabdian ini adalah (1) untuk mendeskripsikan manfaat dan peningkatan nilai ekonomi sampah. (2) untuk mengarahkan warga menjadi nasabah bank sampah. Kegiatan ini melalui 3 tahapan yaitu crafting kepada anak-anak Rumah Bangkit, training manajemen bank sampah kepada petugas bank sampah dengan pesertanya yaitu karang taruna dan sosialisasi dan peresmian pada tanggal 19 Agustus 2018 yang diikuti oleh warga RW 10 yang berjumlah sekitar 300 orang dan diresmikan oleh Walikota Surabaya. Kegiatan ini diawali dengan pengarahan ...

Applied Mechanics and Materials, 2014

Sepuluh November Institute of Technology (ITS) encourages the ECO Campus program. The program ena... more Sepuluh November Institute of Technology (ITS) encourages the ECO Campus program. The program enables ITS to systematically identify, evaluate, manage and improve their environmental performance and practices. One of the program issue is energy saving in building. The energy saving effect of an air-conditioning system retrofit project is analyzed by Energy Conservation Opportunities (ECOs) Method. These ECOs are assessed in terms of their costs and benefits, and an economic comparison to rank the various refrigerants. Finally, an Action Plan is created where certain ECOs are selected for implementation. Civil Engineering Department has a responsibility to design infrastructure and green building concept planning. This department also has the largest energy consumption in this faculty comparing the other department. The energy consumption on this Department is 60829 kWh/month. The value of IKE is 13.39 per month with the largest electrical energy consumption in air-conditioning syste...

Advanced Materials Research, 2015

Reducing energy consumption in buildings has been an important and growing concern in most countr... more Reducing energy consumption in buildings has been an important and growing concern in most countries since the Kyoto Protocol was entered into force in 2005. For instance, ITS has set the target reduction of greenhouse gases in building and support act as a legal framework for promoting ECO Campus program. Design concept using glass layering construction with bubble wrap can contribute significantly in reducing the required air conditioning system size so annual energy cost decrease too. The objective of this paper is to present an overview of the basic principles of thermal insulation, the example of building energy modeling using polyethylene insulation materials, and to survey the most commonly used building insulation materials as well as their performance characteristics. A “bubble wrap” with a reflective insulation helps to reduce heat loss by reflecting away up to 97% radiant energy with less than 0.05 emittance. The result from this study is 3% to 6% annual energy savings wa...

Research to determine the characteristics of heat transfer outside a pipe in cross flow has been ... more Research to determine the characteristics of heat transfer outside a pipe in cross flow has been progressing very rapidly. One of them by modifying or rearrangement composition of the tube in the condenser to reduce the dynamic forces from the impact of fluid flow in critical region without missing the purpose design of surface condenser to condense an exhaust steam from steam turbine to reach a maximum efficiency and change exhaust steam become pure water (condensate water) that may be returned to the steam generator as boiler feed water. This become important because of the presence of condensation of exhaust steam below atmospheric pressure, vapor pressure drop between inlet and exhaust turbine increases which increases the amount of heat available for conversion into mechanical power. The optimal angle to cope in high pressure in critical area is the main object from this research. 3D numerical model using CFD software ANSYS 14.5 with k-ε standard solver pressure based solution....

IOP Conference Series: Materials Science and Engineering, 2019

JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK), 2020

Bank sampah adalah sebuah sarana bagi masyarakat untuk mengelola sampah yang bernilai ekonomi. Pr... more Bank sampah adalah sebuah sarana bagi masyarakat untuk mengelola sampah yang bernilai ekonomi. Program bank sampah telah menjadi suatu bentuk paradigma baru bagi masyarakat untuk lebih peduli terhadap lingkungan. Pada dasarnya, sistem manajemen bank sampah mengadopsi sistem manajemen perbankan sederhana. Umumnya, para nasabah menyetor sampah kepada bank sampah, kemudian sampah tersebut akan dikonversi menjadi saldo sesuai nilai ekonomis penjualannya. Di Surabaya, bank sampah sudah diinisiasi dan berkembang di berbagai daerah. Salah satu bank sampah yang ada di Surabaya adalah bank sampah di Simojawar, Kecamatan Jambangan. Bank sampah yang terbentuk pada tahun 2018 ini masih belum berjalan secara maksimal karena berbagai kendala dan masalah. Melalui penelitian ini, hendak dilakukan identifikasi dan analisis kendala selama proses keberlangsungan bank sampah di Simojawar. Selain itu, juga dilakukan perumusan strategi yang sebaiknya dilakukan agar bank sampah tetap berkelanjutan. Berdas...

Proper processing to overcome the abundance of plastic waste is needed. Currently, pyrolysis tech... more Proper processing to overcome the abundance of plastic waste is needed. Currently, pyrolysis technology is one method that can overcome plastic waste. Pyrolysis is a thermochemical process, which breaks down long alkyl chains into hydrocarbons at high temperatures. This study aims to determine the effect of temperature on yield and heating value using the analysis of variance (ANOVA) method. The pyrolysis of plastic waste is carried out with HDPE plastic material. The pyrolysis process is carried out in a reactor with 50 grams of feed at various temperatures of 500, 550, 600 and 650⁰C. The conclusion that can be drawn from this research is that there is a decrease in yield and calorific value with increasing temperature. The results of the analysis concluded that temperature had an effect on the yield produced and the calorific value of the product. The best yield was obtained at 35.86% and a heating value of 10530.461cal / g at a temperature of 100oC. Based on the results of data a...

Journal of Mechanical Engineering, Science, and Innovation

A numerical study to reduce the condenser pressure in critical areas of a power plant surface con... more A numerical study to reduce the condenser pressure in critical areas of a power plant surface condenser has been carried out. Numerically, effects are considered through a three-dimensional simulation approach. Modifying by adding a guide plate with a three variation of angle, (?) 15?, 30?, 45? in the surface condenser area to reduce the dynamic forces and pressure due to the collision of fluid flow in the critical pipeline without reducing the purpose of the design of shell and tube heat exchanger results in transferring heat. The drag force caused by the interaction of the shear layer with the surface of the body is very undesirable, so that the control of the flow fields is needed, one of which is by optimal angle guide plate of the pipe arrangement in the critical area. This study aims to determine the optimal plate angle to overcome high pressure in the critical area. This research was numerically conducted using 3D CFD ANSYS 14.5 software with a turbulence model using a standa...

IOP Conference Series: Materials Science and Engineering

The aim of this research is designing and testing an Induced Draft Cooling Tower (IDCT). The Cool... more The aim of this research is designing and testing an Induced Draft Cooling Tower (IDCT). The Cooling tower is the main instrument which used to cool the hot water from the condenser and release heat into the atmosphere at a power plant. Temperature is maintaining as cool as original condition. One of the components of the cooling tower is filler. It is very influential on IDCT performance, where the contact surface between water and air is expanded and the contact time is extended. An experimental study to evaluated the heat and mass transfer coefficient is conducted. A heat transfer correlation is developed; a new variable is defined. The effect of controlling parameters such as range of temperature, heat rejected rates, effectiveness has been analysed. IDCT was filled with a straight, zigzag and wave filler. The results indicate that the tower characteristics increase with increase cold air velocity, with the variation of filler, the highest tower characteristics get from wave filler arrangement.

Journal of Applied Sciences, Management and Engineering Technology

Nowadays, waste is a serious problem, especially plastic waste, which is quite alarming in the wo... more Nowadays, waste is a serious problem, especially plastic waste, which is quite alarming in the world. Plastic is waste that is difficult to degrade and takes hundreds of years to decompose. One of the promising technologies for recycling plastics is pyrolysis. This is the process of breaking long chains of polymers into hydrocarbons which are carried out at high temperatures. The purpose of this paper was to know the effect of using catalysts and non-catalysts on yield and calorific value. In this study, the pyrolysis process used a natural zeolite catalyst with a temperature of 500ºC. 50 grams of HDPE Plastic feed was put into the reactor for 3 hours. The variations in the addition of Zeolite catalyst were 1.5, 2.5, 3.75 and 5%wt. The results goals that the highest yield was 44.36% and the heating value of 10230.295 cal/g for the addition of 5 grams of catalyst. The addition of a catalyst can increase the conversion of plastic to fuelKeywords: Catalyst, Plastic, HDPE, energy, pyrol...

R.E.M (Rekayasa Energi Manufaktur) Jurnal

Infotekmesin

This article discusses a preliminary study of developing a paddlewheel aerator for shrimp ponds u... more This article discusses a preliminary study of developing a paddlewheel aerator for shrimp ponds using an integrated intelligent aquaculture system to support intensification. Two paddlewheel aerators with different phases have been successfully installed. The test was carried out on two different types of motors, which were intended to comprehend the performance of every motor on a paddlewheel aerator. The ratio of the speed values for a single-phase motor was 102 rpm and for a 3-phase motor was 110.3 rpm. The data from the performance observation of the aeration wheel motor can be viewed via a smartphone using a website application. The data displayed from the observations are in the form of data on voltage, current, frequency, power, power factor, and the power generated by the pinwheel motor. The test results show the performance of the aeration wheel motor that works under normal conditions with an average measurement error of 0.23%, below the acceptable error limit of 0.5%. Thi...

Journal of Mechanical Engineering, Science, and Innovation

Axial fans are widely applied in the industrial sector. Axial fans are used for ventilation syste... more Axial fans are widely applied in the industrial sector. Axial fans are used for ventilation systems and other cooling systems. The blade design of the axial fan requires an airfoil study. Unfortunately, there are not many articles that discuss in detail about airfoils, especially on noise and vibration that can have an impact on axial fan performance using computational fluid methods or software. This study performs axial fan analysis using computational methods with ANSYS Fluent, Static Structural, Modal and Harmonic Response software to obtain the values of stress, vibration and fluid flow. The experimental design used is using NACA 1412, 4142, and 6412 airfoils on the tip with variations in angles of 60, 74, and 80. While on the hub uses NACA 9312, 9412, and 9512 airfoils with angle variations of 20, 30, and 60 and simulated to find the value of vibration and stress analysis. The 3D axial fan design is imported into the ANSYS Fluent, Static Structural, Modal and Harmonic Response...

Mayoritas nelayan tradisional menggunakan tempat penyimpanan sederhana seperti kotak styrofoam, p... more Mayoritas nelayan tradisional menggunakan tempat penyimpanan sederhana seperti kotak styrofoam, peti kayu, dan palka sederhana dengan media pendinginan es balok. Penyimpanan tersebut belum memiliki insulasi yang baik sehingga berakibat pada kualitas ikan yang menurun. Belum lagi keluhan terkait cepat rusaknya box ikan yang terbuat dari styrofoam tersebut. Kekurangan kotak ikan berbahan styrofoam adalah sangat mudah rusak dan berlumut. Beberapa penelitian memberikan solusi untuk menginsulasi palka dengan beberapa bahan insulasi seperti polyurethane, sekam padi, aluminium dan sebagainya. Penelitian ini bertujuan untuk menurunkan laju perpindahan panas pada palka ikan kapal 7GT dengan variasi kevakuman dan persentase es terhadap ikan. Konstruksi insulasi dibuat sedemikian hingga dengan variasi fiberglass dan polyurethane dengan ketebalan tertentu diharapkan dapat meningkatkan masa pemakaian fish hold menjadi lebih lama

Seminar Nasional Sains dan Teknologi Terapan V, Oct 17, 2017

Novateur Publication, Apr 22, 2021

Jurnal Teknik ITS, 2013

Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari ... more Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari energi alternatif yang potensial untuk dikonversikan menjadi energi listrik. Hal ini yang melatarbelakangi suatu simulasi energi gelombang dengan penggerak sistem bandul yang ditempatkan di dalam sebuah tangki. Tugas akhir ini difokuskan pada respon kecepatan gerak bandul dengan variasi massa dan panjang bandul untuk memperoleh energi maksimal dari sebuah bandul yang berosilasi secara harmonik terhadap goncangan air. Diawali dengan pemodelan matematis pada sistem ponton-bandul dengan tiga derajat kebebasan kemudian dilakukan analisa terhadap respon gerakan ponton. Tujuannya adalah untuk mendapatkan satu model yang paling optimum. Hasil dari analisa tersebut menunjukkan bahwa nilai kecepatan tertinggi didapatkan pada amplitudo 6cm dengan panjang lengan bandul 9 cm dan massa bandul 300 gr yaitu sebesar 783,8x10-3 m/s dan kecepatan minimum didapatkan pada panjang lengan bandul 17 cm dan mas...

Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari ... more Perkembangan ilmu pengetahuan dan teknologi mendorong manusia untuk terus berinovasi dan mencari energi alternatif yang potensial untuk dikonversikan menjadi energi listrik. Hal ini yang melatarbelakangi suatu simulasi energi gelombang dengan penggerak sistem bandul yang ditempatkan di dalam sebuah tangki. Tugas akhir ini difokuskan pada respon kecepatan gerak bandul dengan variasi massa dan panjang bandul untuk memperoleh energi maksimal dari sebuah bandul yang berosilasi secara harmonik terhadap goncangan air. Diawali dengan pemodelan matematis pada sistem ponton-bandul dengan tiga derajat kebebasan kemudian dilakukan analisa terhadap respon gerakan ponton. Tujuannya adalah untuk mendapatkan satu model yang paling optimum. Hasil dari analisa tersebut menunjukkan bahwa nilai kecepatan tertinggi didapatkan pada amplitudo 6cm dengan panjang lengan bandul 9 cm dan massa bandul 300 gr yaitu sebesar 783,8x10-3 m/s dan kecepatan minimum didapatkan pada panjang lengan bandul 17 cm dan mas...

VANOS Journal of Mechanical Engineering Education, 2018

There are many important reviews about the flow characteristics in the body of the racing bike he... more There are many important reviews about the flow characteristics in the body of the racing bike helmet caused by the relative motion of the air along the Trailing Edge shape. The lines formed in such a way in the speed field will form a streamline stream so that the lines are in line with the flow at each point in the flow field. Thus, the streamline will form a pattern of airflow around the helmet. This aerodynamic characteristic study was performed on time meter helmet body visualized numerically using Computational Fluid Dynamics (CFD) with Solid Work Flow Simulation software. With variation of Trailing Edge 25 mm, 75 mm, 125 mm. Urgency research about helm time trial is believed to provide information about the flow that occurred. The result shows that the drag coefficient reduction that occurs on the cut variation of 75 mm compared with other variations on the Reynolds number 1.16 x 105 of 0.395.

JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK), 2018

Kota Surabaya merupakan salah satu kota yang terkenal dengan sebutan kota banjir ketika musim huj... more Kota Surabaya merupakan salah satu kota yang terkenal dengan sebutan kota banjir ketika musim hujan tiba dan memiliki sungai yang kotor dipenuhi sampah. Beberapa tahun ini, pemerintah kota Surabaya mulai membenahi dan menata serta membuat program – program yang bertujuan untuk merdeka dari sampah. Salah satu usaha yang dilakukan Pemerintah kota Surabaya untuk mengatasi banjir dan penumpukan sampah yaitu menciptakan program bank sampah di beberapa wilayah. Tujuan dari pengabdian ini adalah (1) untuk mendeskripsikan manfaat dan peningkatan nilai ekonomi sampah. (2) untuk mengarahkan warga menjadi nasabah bank sampah. Kegiatan ini melalui 3 tahapan yaitu crafting kepada anak-anak Rumah Bangkit, training manajemen bank sampah kepada petugas bank sampah dengan pesertanya yaitu karang taruna dan sosialisasi dan peresmian pada tanggal 19 Agustus 2018 yang diikuti oleh warga RW 10 yang berjumlah sekitar 300 orang dan diresmikan oleh Walikota Surabaya. Kegiatan ini diawali dengan pengarahan ...

Applied Mechanics and Materials, 2014

Sepuluh November Institute of Technology (ITS) encourages the ECO Campus program. The program ena... more Sepuluh November Institute of Technology (ITS) encourages the ECO Campus program. The program enables ITS to systematically identify, evaluate, manage and improve their environmental performance and practices. One of the program issue is energy saving in building. The energy saving effect of an air-conditioning system retrofit project is analyzed by Energy Conservation Opportunities (ECOs) Method. These ECOs are assessed in terms of their costs and benefits, and an economic comparison to rank the various refrigerants. Finally, an Action Plan is created where certain ECOs are selected for implementation. Civil Engineering Department has a responsibility to design infrastructure and green building concept planning. This department also has the largest energy consumption in this faculty comparing the other department. The energy consumption on this Department is 60829 kWh/month. The value of IKE is 13.39 per month with the largest electrical energy consumption in air-conditioning syste...

Advanced Materials Research, 2015

Reducing energy consumption in buildings has been an important and growing concern in most countr... more Reducing energy consumption in buildings has been an important and growing concern in most countries since the Kyoto Protocol was entered into force in 2005. For instance, ITS has set the target reduction of greenhouse gases in building and support act as a legal framework for promoting ECO Campus program. Design concept using glass layering construction with bubble wrap can contribute significantly in reducing the required air conditioning system size so annual energy cost decrease too. The objective of this paper is to present an overview of the basic principles of thermal insulation, the example of building energy modeling using polyethylene insulation materials, and to survey the most commonly used building insulation materials as well as their performance characteristics. A “bubble wrap” with a reflective insulation helps to reduce heat loss by reflecting away up to 97% radiant energy with less than 0.05 emittance. The result from this study is 3% to 6% annual energy savings wa...

Research to determine the characteristics of heat transfer outside a pipe in cross flow has been ... more Research to determine the characteristics of heat transfer outside a pipe in cross flow has been progressing very rapidly. One of them by modifying or rearrangement composition of the tube in the condenser to reduce the dynamic forces from the impact of fluid flow in critical region without missing the purpose design of surface condenser to condense an exhaust steam from steam turbine to reach a maximum efficiency and change exhaust steam become pure water (condensate water) that may be returned to the steam generator as boiler feed water. This become important because of the presence of condensation of exhaust steam below atmospheric pressure, vapor pressure drop between inlet and exhaust turbine increases which increases the amount of heat available for conversion into mechanical power. The optimal angle to cope in high pressure in critical area is the main object from this research. 3D numerical model using CFD software ANSYS 14.5 with k-ε standard solver pressure based solution....

IOP Conference Series: Materials Science and Engineering, 2019

JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK), 2020

Bank sampah adalah sebuah sarana bagi masyarakat untuk mengelola sampah yang bernilai ekonomi. Pr... more Bank sampah adalah sebuah sarana bagi masyarakat untuk mengelola sampah yang bernilai ekonomi. Program bank sampah telah menjadi suatu bentuk paradigma baru bagi masyarakat untuk lebih peduli terhadap lingkungan. Pada dasarnya, sistem manajemen bank sampah mengadopsi sistem manajemen perbankan sederhana. Umumnya, para nasabah menyetor sampah kepada bank sampah, kemudian sampah tersebut akan dikonversi menjadi saldo sesuai nilai ekonomis penjualannya. Di Surabaya, bank sampah sudah diinisiasi dan berkembang di berbagai daerah. Salah satu bank sampah yang ada di Surabaya adalah bank sampah di Simojawar, Kecamatan Jambangan. Bank sampah yang terbentuk pada tahun 2018 ini masih belum berjalan secara maksimal karena berbagai kendala dan masalah. Melalui penelitian ini, hendak dilakukan identifikasi dan analisis kendala selama proses keberlangsungan bank sampah di Simojawar. Selain itu, juga dilakukan perumusan strategi yang sebaiknya dilakukan agar bank sampah tetap berkelanjutan. Berdas...

Proper processing to overcome the abundance of plastic waste is needed. Currently, pyrolysis tech... more Proper processing to overcome the abundance of plastic waste is needed. Currently, pyrolysis technology is one method that can overcome plastic waste. Pyrolysis is a thermochemical process, which breaks down long alkyl chains into hydrocarbons at high temperatures. This study aims to determine the effect of temperature on yield and heating value using the analysis of variance (ANOVA) method. The pyrolysis of plastic waste is carried out with HDPE plastic material. The pyrolysis process is carried out in a reactor with 50 grams of feed at various temperatures of 500, 550, 600 and 650⁰C. The conclusion that can be drawn from this research is that there is a decrease in yield and calorific value with increasing temperature. The results of the analysis concluded that temperature had an effect on the yield produced and the calorific value of the product. The best yield was obtained at 35.86% and a heating value of 10530.461cal / g at a temperature of 100oC. Based on the results of data a...

Journal of Mechanical Engineering, Science, and Innovation

A numerical study to reduce the condenser pressure in critical areas of a power plant surface con... more A numerical study to reduce the condenser pressure in critical areas of a power plant surface condenser has been carried out. Numerically, effects are considered through a three-dimensional simulation approach. Modifying by adding a guide plate with a three variation of angle, (?) 15?, 30?, 45? in the surface condenser area to reduce the dynamic forces and pressure due to the collision of fluid flow in the critical pipeline without reducing the purpose of the design of shell and tube heat exchanger results in transferring heat. The drag force caused by the interaction of the shear layer with the surface of the body is very undesirable, so that the control of the flow fields is needed, one of which is by optimal angle guide plate of the pipe arrangement in the critical area. This study aims to determine the optimal plate angle to overcome high pressure in the critical area. This research was numerically conducted using 3D CFD ANSYS 14.5 software with a turbulence model using a standa...

IOP Conference Series: Materials Science and Engineering

The aim of this research is designing and testing an Induced Draft Cooling Tower (IDCT). The Cool... more The aim of this research is designing and testing an Induced Draft Cooling Tower (IDCT). The Cooling tower is the main instrument which used to cool the hot water from the condenser and release heat into the atmosphere at a power plant. Temperature is maintaining as cool as original condition. One of the components of the cooling tower is filler. It is very influential on IDCT performance, where the contact surface between water and air is expanded and the contact time is extended. An experimental study to evaluated the heat and mass transfer coefficient is conducted. A heat transfer correlation is developed; a new variable is defined. The effect of controlling parameters such as range of temperature, heat rejected rates, effectiveness has been analysed. IDCT was filled with a straight, zigzag and wave filler. The results indicate that the tower characteristics increase with increase cold air velocity, with the variation of filler, the highest tower characteristics get from wave filler arrangement.

Journal of Applied Sciences, Management and Engineering Technology

Nowadays, waste is a serious problem, especially plastic waste, which is quite alarming in the wo... more Nowadays, waste is a serious problem, especially plastic waste, which is quite alarming in the world. Plastic is waste that is difficult to degrade and takes hundreds of years to decompose. One of the promising technologies for recycling plastics is pyrolysis. This is the process of breaking long chains of polymers into hydrocarbons which are carried out at high temperatures. The purpose of this paper was to know the effect of using catalysts and non-catalysts on yield and calorific value. In this study, the pyrolysis process used a natural zeolite catalyst with a temperature of 500ºC. 50 grams of HDPE Plastic feed was put into the reactor for 3 hours. The variations in the addition of Zeolite catalyst were 1.5, 2.5, 3.75 and 5%wt. The results goals that the highest yield was 44.36% and the heating value of 10230.295 cal/g for the addition of 5 grams of catalyst. The addition of a catalyst can increase the conversion of plastic to fuelKeywords: Catalyst, Plastic, HDPE, energy, pyrol...

R.E.M (Rekayasa Energi Manufaktur) Jurnal