Indonesia Conference Directory

Corresponding Author
DPPJ UMMagelang

Institutions
(a) Automotive Engineering Department, Universitas Muhammadiyah Magelang, Magelang, Indonesia
(b) Jurusan Teknik Mesin dan Industri, Fakultas Teknik, Universitas Gadjah Mada Jl. Grafika No. 2, Yogyakarta 55281
*Corresponding author: saifudin[at]ummgl.ac.id

Abstract
HSS tool steel usually used on engineering aplication especially as cutters. This material has some weaknesses such as wear easily and corrosion, and that weaknesses can be reduce by giving certain coating on the surface. The purpose of this research is to know the effects of Diamond Like Carbon (DLC) coating and also quenching heating treatment and tempering to the characterization of physical and mechanism of the HSS steel surface. The physical characterization which will be elaborate is the micro structur, whether the mechanism characters which will be know are hardness and wear rate. HSS steel has chemical compotition variation (% mass) : 0,75-1,5 C; Co >12; V > 5; 4-4,5 Cr; 10-20 W and Mo. DLC coating uses Plasma Assisted Chemical Vapor Deposition (PACVD) techniques with coating duration variation (1,2,3,4,5 and 6 hours) on 300 temperature with pressure variation 1,0; 1,2; 1,4; 1,6; 1,8 and 2,0 mbar. DLC coating material get from methane gas or ethane which is streamed into fire with Argon (Ar). The surface hardness can be know using Vickers micro hardness tool, wear rate can be know using wear tool while the micro structure using optic microscop. The result of this research showed the variation of DLC coating hardness grade depends on coating time process and pressure variation. DLC coating with 4 hours coating process and 1,8 mbar pressure can reduce the surface hardness of HSS tool steel for 62% accompanied by ductile increasing.

Keywords
Tool steel; hardness; wear rate

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/JBTYhMV3QdRW

Corresponding Author
R Edy Purwanto

Institutions
Politeknik Negeri Malang

Abstract
Heat loss occurs due to the temperature difference between the fluid flowing in the pipe and the temperature outside the pipe, it can also occur due to inappropriate material selection and insulation thickness. Insulation is a method for reducing the rate of heat transfer from inside a pipe to the outside of the pipe. Valve is an object that is often encountered in un-insulated conditions so that there is a lot of heat loss in this section. Therefore, an insulation method and the right insulation material are needed to prevent heat loss. The study was conducted to see the effect of two glass wool and rock wool insulation materials on heat loss. The study used a simulation method using NAIMA 3E Plus software. The output of the simulation is the value of heat loss on glass wool and rock wool material. Data analysis using two-way ANOVA method assisted by Minitab software. The results show that the higher the temperature, the greater the heat loss value and the thicker the insulation layer, the smaller the heat loss value. Insulation material is better to use rock wool.

Keywords
thermal insulation, heat loss, valve, glass wool, rock wool

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/n9AqzQZKgcr2

Corresponding Author
Ratu Amilia Avianti

Institutions
Departement of Mechanical Engineering Education, Engineering Faculty, State University of Jakarta
*email : avianti.raa[at]gmail,com

Abstract
The development of increasingly sophisticated technology will have positive and negative impact, some equipment will result in greater heat compensation. This heat dissipation must be removed immediately to keep the device working properly. Therefore, equipment is needed that can move this heat quickly and large capacity. In addition to be discarded, heat from potential sources can also be utilized. One heat transfer device that does not require energy as a driver is a heat pipe. This tool is very potential for the application, but not yet widely used especially in Indonesia, then in this paper will be described the process from planning to testing. The heat pipe in the material selection is strongly influenced by the plan of its use, both its physical components on the form of pipes, axis structures, and working fluids as well as the operating range of the heat pipe. Some types of heat pipe and the use of materials will be different to the manufacturing process. One of the heat pipe tests applied to the solar collector showed a positive result.

Keywords
heat transfer; fast; pipe

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/bzCnLHc3JADT

Corresponding Author
Nazaruddin Sinaga

Institutions
Mechanical Engineering Department of Diponegoro University

Abstract
The heat transfer on a motorcycle engine block is quite complicated but can be solved computationally. To simulate the calculation, an appropriate turbulence model is required. In this study, the effect of eleven turbulence models was analyzed in the simulation of a motorcycle engine block cooling using finite volume method. The turbulence models tested were Spalart-Allmaras (vorticity-based and strain/vorticity-based), k-e standard, k-e RNG, k-e realizable (all with standard wall functions and enhanced wall treatments), k-omega standards, transition k-kl-omega, and transition SST. The engine block was considered as a cylindrical finned tube with a specified size. In this work, several essential parameters were observed, such as the heat transfer coefficient, wake area, horseshoe vortex, and pressure drop. The calculation results were analyzed and compared with the results of previous studies. Based on the heat transfer coefficient results, it was found that all turbulence models agreed well with the experimental results, but there were significant differences in the pressure loss calculation. Based on the accuracy and computational cost, it can be concluded that the Spalart-Allmaras and the transition SST are the turbulence models which give optimum result for calculating the heat transfer in a motorcycle engine block.

Keywords
engine block; heat transfer; numerical method; turbulence model

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/rtbYCgKMQ72f

Corresponding Author
Juniono Raharjo

Institutions
(1)Pusat Unggulan Iptek - Sistem Kontrol Otomotif
Institut Teknologi Sepuluh Nopember Surabaya

Abstract
Modular design of battery pack for electric vehichle (EV) is an important things to consider. Because in modular battery pack, cost to manufacture can be reduced also easiness in handling. Modular battery pack also meant to be easily swapped between every modules. In this paper were presented the thermal analysis of modular battery pack that generate heat during charging and discharging process. heat flux generated by the batteries will affect its surrounding thus increase the temperature of the batteries. Thermal analysis simulation were conducted to ensure the heat generated not exceed the maximal operational temperature of the battery cells that can reduce the battery life. The simulation is done by analyzing the heat power generated by the cells, the effect on surrounding, and heat generated by the current flow in the circuit. Simulation result were showing that the temperature rise in the battery pack not exceed 60°C, in the surrounding or even in the battery cell. It is found that these two parameter, lower cost to manufacture, and thermal stability having the largest effect on reliability. Hopefully futher studies of thermal management on battery pack conducted to generate reliable design of modular battery packs

Keywords
: Modular Battery Pack, Electric Vehicle, Low Cost Manufacture, Thermal Stability

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/LY2bnM9kRhKz

Corresponding Author
Muhammad Amin

Institutions
a) Department of Mechanical Engineering, Universitas Samudra, Kota Langsa, 24416, Indonesia
b) Department of Mechanical Engineering, University of Syiah Kuala, Banda Aceh, 23111, Indonesia

Abstract
Thermal energy storage using Phase Change Materials (PCM) is now widely applied to wall builds. Generally, PCM used for applications on walls building has a melting point of 0-65 oC. Beef tallow and coconut oil is a type of organic PCM known as Bio PCM needs to characterize by using the T-History Method. The T-History method is more accurate than DSC. This study aimed to determine the thermal properties of beef tallow/coconut oil PCM using the T-History method. The beef tallow and coconut oil as bio PCM material used in this study with the variation is respectively: 100%, 70+30%, 60+40%, and 50+50%. Tests are carried out using the T-History method. From the results of testing and analysis obtained supercooling temperature, melting temperature, specific heat, and latent heat for bio PCM beef tallow/coconut oil. The effect of adding coconut oil mixture to beef tallow caused a decrease in melting temperature and supercooling temperature, while the specific heat and latent heat of bio PCM of beef tallow/coconut oil ranged from 2.96-2.19 kJ/kg.oC and 101.05-72.32 kJ/kg. The result obtained that this bio PCM material of cow beef tallow/coconut oil can apply, as additional material in wall building applications.

Keywords
Thermal properties, Beef tallow/coconut oil, T-History method, Phase change material (PCM)

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/LMBmxzHZhPyt

Corresponding Author
Bambang Iskandriawan

Institutions
Institut Teknologi Sepuluh Nopember

Abstract
Air conditioning systems constitute one kind of essential utility at a building. They still could be decreased its electrical cost consumption by way of insistent to continue the performance of its room air cooler. The achievement of air conditioning system mentioned is very determined by the airflow pattern inner the room. Based on the airflow pattern which is raised furthermore it will be deliberated the cooling load which is determine cooling electricity costs. Construction elevation consideration will be carried out in the framework to obtain the air conditioning system within the most economical of energy consumption. The parameter mentioned is interesting to analyses due to the effect of sun heat will very dependent to the constructions elevation. Methodology which is to be used remains within practice the numeric simulation. The measuring of air temperature directly by means of censors also implemented within several level of construction elevation. The outcome of air temperature measurement will be used as the input value to the numeric simulation execution in the apartment unit with the local air conditioning system. It is obtained cooling load of local air conditioning system in the apartment building unit within 8 (eight) altitude.

Keywords
thermal simulation; cooling load; apartment unit; and building construction elevation

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/PUAEWDYuVfeg

Corresponding Author
Razali Thaib

Institutions
(a) Department of Mechanical Engineering, Faculty of Engineering, Universitas Samudra, Kota Langsa, 24416, Indonesia
(b) Department of Mechanical Engineering, Faculty of Engineering, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia
(*) azuarrizal[at]unsam.ac.id

Abstract
This study investigates the use of biodiesel (pangium edule reinw and cocos nucifera) in diesel engines as alternative fuels. A direct injection diesel engine was simulated via a thermodynamic cycle model for investigation. Thermodynamic and performance parameters and compared for diesel, biodiesel (pangium edule reinw and cocos nucifera) fuels at two different states. The results showed that pangium edule reinw and cocos nucifera presented a lower cylinder temperature and pressure, and thus a lower engine performance than diesel fuel for the equal injection conditions. The brake power declines about 29.3% and 28.2% at 3200 rpm while brake specific fuel consumption increases about 34.3% and 19.8% at 2200 rpm for pangium edule reinw and cocos nucifera, respectively. Engine performance for pangium edule reinw and cocos nucifera, respectively. extensively improves for the same equivalence ratio condition, but a more amount of fuel is needed about 44% for cocos nucifera and 36% for pangium edule reinw. The gains in the brake power by cocos nucifera and pangium edule reinw are about 13.6% and 6% at 3200 rpm compared to diesel fuel. The brake specific fuel consumption is also higher about 42.2% for cocos nucifera and 24.3% for pangium edule reinw than diesel fuel. The brake thermal efficiency for pangium edule reinw and cocos nucifera is generally better than diesel fuel.

Keywords
Thermodynamic, Performance, Diesel Engine, Pangium edule reinw, Cocos nucifera

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/Jw7V4Rxgate3

Corresponding Author
Jaelani Sidik

Institutions
a)Departement of Mechanical Engineering, University of Wahidiyah, Faculty of Engineering, Kediri, Indonesia
*jaelanisidik2772[at]gmail.com
b)Educational Construction Building, State University of Jakarta, Indonesia
*arthur[at]unj.ac.id

Abstract
ABSTRAK Wind energy utilization for area with low wind speed potential such as Indonesia remains low due to its low efficiency value. Therefore This research aim to designing and simulation of small wind turbine that can be use in indonesia. We considered for this wind turbin blade are 3. NACA airfoil 4412 was selected and 1.13 of coefficient lift maximum .We designing the blade of wind turbin using software solidworks. The simulation using software Q-blade for the blade radius 1.3 m with various angle of attack 0°, 10°,15°.

Keywords
Wind turbine blade, Airfoil, Q-blade, SolidWorks

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/LVFUqX7MAGkW

Corresponding Author
Muhammad Haekal Habibie

Institutions
Pusat Riset dan Pengembangan SDM - Badan Standardisasi Nasional

Abstract
Conformity assessment is a process commonly used in calibration activities to ensure the validity of the results of measurements or calibrations with specific requirements or standards. In this research the use of conformity assessment was carried out on long gauge block calibration activities in National Metrology Institute of Indonesia by determining objective criteria called decision rule which aims to determine the limit of conformity assessment, conformance zone, and specification zone requested by the calibration customer. Decision rules are made by referred in statistical acceptance sampling based on go/no-go decisions with Gaussian Probability Density Function for the measured quantity. From this research, it was found that in the calibration process of long gauge block, the use of the decision rule concept was to use tolerance interval with a guard band. The guard band value is obtained from the uncertainty measurement analysis of the long gauge block calibration, while the acceptance zone value is obtained from the limit deviation of long gauge block based on ISO 3650.

Keywords
decision rule, conformity assessment, long gauge block, calibration, statistic

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/KZxJ8Br3NR2b

Corresponding Author
Razali Thaib

Institutions
(a) Department of Mechanical Engineering, Faculty of Engineering, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia

* hamdani[at]unsyiah.ac.id

(b) Department of Mechanical Engineering, Faculty of Engineering, Universitas Samudra, Kota Langsa, 24416, Indonesia

Abstract
Indonesias energy consumption pattern for housing sector for heating or cooling reached 43%, water heater 27%, lighting 3.4%, appliances 26.6%. As for the use of electrical energy, reaching 50% of the total energy needs is absorbed in the building sector. Therefore, the residential sector has a very dominant role in electricity consumption, whether for lighting purposes, the use of household appliances as well as for conditioning the room. Indonesia, as a developing country, will undoubtedly move to improve the lives of its population. It will affect and induced a shift in energy pattern used by the community, whereby most of it will be used to increase the comfort of the space, whether by improving the air conditioning system, the lighting system, or water heater. On the other side, the current energy consumption pattern for the commercial building sector reaches 50-60% for air conditioning systems, 30% for lighting and the rest to drive other machines. The combination of building materials and Phase Change Materials (PCM) is an efficient way to increase the thermal energy storage capacity of building components. The technique of combining with encapsulation-PCM composite form is the most straightforward method, practical and economical method, and has attracted the interest of many researchers in the last decade. This paper will discuss the results of developing numerical modeling for simulation of thermal energy storage on composites equipped with macro-encapsulation PCM. The simulation is conducted using the EnergyPlus software. Furthermore, the validation of modeling result will later be conducted through comparison of simulation result with field test result. In this study used beeswax as a phase change material. Beeswax has a moderate melting temperature, which is placed within the indoor thermal comfort range and the bentonite clay will be used as a binder. From the results of numerical analysis of the use of PCM on the walls of the building can be concluded that PCM is able to store heat energy from solar radiation, thus reducing energy consumption for cooling the room. Increasing the thermal conductivity of PCM will increase the value of the overall heat transfer coefficient of the wall resulting in increased energy consumption for room cooling

Keywords
Phase change material, Beeswax, Bentonite, Heat storage

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/7ZKWhCxg3rMA

Corresponding Author
Mochamad Rizkya Firmansyah

Institutions
Faculty of Technology and Vocational Education, Indonesia University of Education

Abstract
Situgede Village, Karangpawitan District, Garut Regency is one of the villages in Garut West Java that has the advantage of having the potential to produce crops, especially dry corn. However, the authors observations state that there has been no processing of dried corn kernels, especially for poultry feed, which incidentally is abundant in the Situgede Village and surrounding areas. The authors observations also state that ungags in the Situgede Village and surrounding areas received feed supplies from outside the region, for example from East Java and Central Java. This was felt to be ineffective given the potential for abundant sources of feed ingredients in the area, namely corn kernels. Therefore, through the tasks of the Analysis and Design Course, the author designed and built a Corn Seed Crusher Machine to meet the needs of poultry feed in the area and its surroundings independently. By collaborating with the Koperasi Unit Desa Situgede Village as a vendor for writers, it is hoped that this goal can be achieved. The method used is the observation of the area around the Situgede Village and its surroundings, interviews with several related figures, study of literature with several sources such as books and journals, and analysis and design to design machines according to needs. With the results of the design of the machine made by the author obtained Corn Seed Crusher Machine with a capacity specification of 10 kg / hour.

Keywords
utilization, crusher machine, corn seed, poultry

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/K6exDCcaNkJR

Corresponding Author
Alvera Apridalianti Melkias

Institutions
Department of Energy Conversion Engineering, Politeknik Negeri Bandung Jalan Gegerkalong Hilir, Ciwaruga 40012, Jawa Barat, Indonesia

Abstract
A specially designed low speed generator has been developed in order to be used on low speed turbines. The axial flux permanent magnet (AFPM) generator type was chosen to meet these needs. The generator consists of a stator and a rotor. To determine the characteristics of the AFPM generator, we conducted a study of the effect of the distance between the stator and rotor, and the effect of rotational speed on the output voltage. The stator armature was made of copper wire with a diameter of 0.2 mm. The number of turns of a winding was 200 turns which produced a resistance of 100 ohms. The shape of the armature was adjusted to the shape of the magnet. The rotor disc was occupied by 18 magnets arranged symmetrically. The size of the magnet was 50 mm long, 30 mm wide and 10 mm thick. The laboratory test was conducted by placing the rotor ranging from 23 mm to 15 mm, with changes in distance of 2 mm each, from the stator. From the measurement, the linear equation of output voltage vs rpm curve was obtained as well as the output vs stator-rotor equation. From the result, it can be seen that increase of rpm and the closer the rotor-stator distance, the higher the output voltage.

Keywords
AFPM generator, characteristics, output voltage, rotor, low speed generator

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/8NYAZDQbL7mf

Corresponding Author
DADANG HAFID HAFID

Institutions
Technological and Vocational Education Students Programs Graduate School, Universitas Pendidikan Indonesia.
Jl. Dr. Setiabudhi no 229, Bandung, West Java, Indonesia.

Abstract
Abstract- This research conducted with the aim of analyzing the application of work-based learning models that are being carried out in vocational school (SMK). The scope of this research relates to the frame work used, weaknesses, strengths and characteristics of industrial involvement in the education process. This research was conducted by survey method, namely by directly observing the work-based learning process, with data obtained from the results of observations, interviews and literature studies from the program implementation manual. The object of his research is a school that carries out a work-based learning model in West Java, among others, Bandung Vocational High School with the name Toyota Tehcnician Education Program (T-TEP) and ASTRA Motor Guidance, 2 Subang Vocational School with the name Teaching Factory program, and Weak Abang Vocational High School under the name of the Yamaha Fostered Class Program. From the results of this research, it was found that the three schools that applied work-based learning models had their respective characteristics, and had their respective weaknesses and strengths, but from the three schools there was one similarity, namely using frame work synchronization, namely the curriculum arranged based on synchronization between compulsory competencies in school with industry competencies.

Keywords
Keyword; a learning approach that leverages the workplace to structure the experience gained in the workplace

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/mKtFHp2aVjMz

Corresponding Author
Apip Badarudin

Institutions
a) Refrigeration and Air Conditioning, Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Ciwaruga, Kab. Bandung-Barat, 40012, Indonesia
* apipbdr[at]polban.ac.id

Abstract
The point on the psychrometric chart shows 7 properties of certain air conditions. If two properties are known then 5 other properties can be calculated. Air treatment will change properties of air conditions. Changes in air condition can be determined by measuring each air condition and plotted on a psychrometric chart. One of the uses of psychrometric analysis is to determine the amount of cooling capacity used in air conditioning systems. To show the condition of the air at any time needed a system that is integrated between the data acquisition device and data display. This research designs and develops applications that are ready to display data and air psychrometric charts that can later be integrated with hardware equipped with sensors through an interface. Psychrometric applications are designed using the JavaScript programming language, so they can be opened using any web browser. Psychrometric charts are drawn using iteration calculation methods. The appearance of the air psychrometric chart is in the form of air processing points, namely outside air (OA), air mixing (EA) and indoor air condition (RA) and other air processing lines.

Keywords
psychrometric; air conditions; properties

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/xMCdKkTVw6v3

Corresponding Author
Yusuf Dewantoro Herlambang

Institutions
Politeknik Negeri Semarang

Abstract
This study examines a 5-blade Horizontal Axis Wind Turbine to obtain the best performance at different wind speeds. The dimensions of this wind turbine have a rotor diameter of 1200 mm, blade length of 600 mm, number of blades 3 pieces, and blade material made of fiberglass. The research method uses different wind speed test parameters. The speed test using a blower is 4 m / s, 5.1 m / s, 6.5 m / s, and 7.5 m/s with the load of the lamp is 10 W, 20 W, 30 W, 40 W, 50 W, and 60 W. Subsequently analyze the characteristics of the wind turbine. The results of testing the wind turbine at a speed of 4 m/s obtained a maximum efficiency of 36.4% at 496.3 rpm turbine rotation. Power generator 15.8 W at a voltage of 20V and current 0.79 A. Keywords: 5-blade HAWT wind turbines, wind speed, system efficiency, generator power, tip speed ratio.

Keywords
Blade turbines; wind speed; efficiency of system; tip speed ratio; turbine power

Topic
Mechanical Engineering

Link: https://ifory.id/abstract/EMRgG9LBHYan