cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota denpasar,
Bali
INDONESIA
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 16 Documents
 1   2 
Search results for , issue "Vol 3, No.2 Oktober 2009" : 16 Documents clear
Transient Performance of Radiator on Engine Rpm Variation with AC Loading Made Ricki Murti
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (469.313 KB)

Abstract

Radiator is one of heat exchanger applications that has a function to remove out of heat must be able to operate properly for allowed engine temperature limit. Vehicles that operate on the street usually driving with varying rpm so that the heat produced by the combustion process is not constant and then this study analyze the performance of radiators as a function of time (transient condition). Tests is done on the condition of operating the engine with five rpm variations, each for one hour with air conditioning load and without air-conditioning load. The data to be collected includ the inlet and outlet temperature of radiator and radiator fluid volume flow. The results obtained is heat exhausted rate as a performance radiator is increasing as with increasing of engine rpm and at load conditions with the AC produces heat exhausted rate is greater than AC without AC load. The heat exhausted rate in an hour of machine operation still shows the system operates at a transient condition due to there still exists a numerical increase in the heat exhausted rate as a function of time.
Fatigue Characteristic of Chopped Strand Mat/Polyester Composite I Made Astika
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (332.506 KB)

Abstract

The application of composite as an alternatif material to substitute of metal has better properties than metal such as light, high elasticity, corrosion and fatigue resistance. Some components in its application are subjected to millions of varying stress cycles that initiated to fatigue failure such as crack, delamination and fracture. The strength of composite is influenced by construction, fiber type, orientation and fiber fraction. The objective of this experiment is to investigate the fatigue characteristic on SCM composite. Material composite to be used is glass fiber with chopped strand mat (CSM) as fiber and Yukalac 157 BQTN-EX with 1% hardener (Mexpox) as matrix. The mold process was built with hand lay-up. Fiber volume fractions in composite are 40, 32 and 24 %. The tests to be done on composite are fatigue and tensile test. The research show that the increasing of fiber fraction in composite affects increasing of fatigue life, endurance limit and tensile strength. Fatigue failure modes of composite are debonding, matrix cracking, delamination and fiber fracture.
Appraisal of Technical and Economic Potential Micro Hydro Power in Bali Made Suarda
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (357.644 KB)

Abstract

Energy consumption particularly on electrical energy is continuously rising as a result of economical rising and community development. Therefore it needs to be responded about this condition by developing renewable energy utilization which is available. Renewable energy resources are possibly developed in Bali such as solar energy, wind energy, hydropower, sea energy, and biomass. However, one of renewable energy resources that is mostly possible to be developed in Bali is hydropower in micro scale wich is named microhydro. The microhydro works by using water flow which has debit and head. However, it needs an analysis both on technical and financial analysis. Technical analysis is carried out by checking debit and head of the water flow, and then calculates power would be generated, as well as the microhydro equipments such as a suitable choosen of turbine, generator, and control system. In other hand, financial analisis is carried out by estimating cost for construction the microhydro system, then by using Net Present Value (NPV) analysis to check that the system is profitable to be constructed. The result noted that Bali has some potential microhydros or pycohydros that are profitable to be developed both on rivers and irrigations system. Financial analyses show that microhydro systems are profitable to be constructed (NPV is positive) as long as their heads are at least 10 meters, in other side, debit are more affected their generated powers. However, in their implementations, there are some barriers in utilize those water flow resources as microhydro systems, such as those sites were used for other objects for instant as tourism destinations, or for cultures conservation, and the communities have not knew the advantages of microhydro yet therefore it needs socialization to the communities.
Technical Appraisal of Continuous Destilator Type as Alternative Fuel Producer from Basic Materials of Arak Bali Sukadana -; Bandem A.; Tenaya -
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (190.511 KB)

Abstract

Arrack Bali which is produced from traditional process has low quality (<40%). With controlling of operational variable such as evaporation temperature, will improve arrack Bali quality. Arrack Bali with quality more than 80 % has octane number more than 108,6, higher then petroleum octane number (80 until 90), easy burning and evaporation, very good to be alternative fuel to engine. In order to product height quality any operational variables like temperature, step, and sprayer models should be noticed. This experiment is to obtain operational variables of distillatory to product arrack Bali as an alternative fuel and it is tested in motor cycle engine at speed and compression ratio variables toward performance like emission. The higher evaporation temperature is the higher capacity of product to be obtained, on the other hand, the lower quality to be reached. Generally, comparing with petroleum, arrack Bali yields lower emission.
Wasted Heat Engine Utilization in Central AC Condenser Type Water Chiller for Economical Energy Water Heaters I Made Rasta
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (336.964 KB)

Abstract

Central AC type water chiller is a refrigeration machine that release heat to environment. Heat energy that released to environment comes from room heat load that absorbed by machine and heat from compressor. The best form in using this loss energy is heat recovery water heater technology, where this machine will take heat from condenser by a heat exchanger to heating water. Refrigerant will flow in the heat exchanger before entering condenser, after that refrigerant flow to other components such as, expansion valve, evaporator, compressor and than return again to condenser, this process will be cycling regularly (closed cycle). Based on experimental and analysis result especially for AC with capacity 2 Pk, and tank capacity 75 liter, with water heater recovery device obtained that: (1) Compressor power consumption decrease from 1.66 kW to 1.59kW. (2) Heat rejected from condenser and used by water heater has ratio 4.683 kJ/s and 1.59 kJ/s, with water heater efficiency is 32.2%. (3) Maximum water temperature can be reached are in range 34oC – 47.5oC in 10-150 minutes and flow rate is 0.5 – 2.5 liter /min
Performance Analysis of Window Type Air Conditioning with Addition of Heat Exchanger Equipment I Ketut Gede Wirawan
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (436.839 KB)

Abstract

One manner to be used to increase refregration effect is by flowing hot refrigerant out from condensor, it is then touched with the refrigerant out from evaporator on a heat exchanger of counterflow type. Experiment was done by taking samples of pressure at suction (p1) and discharge (p2) of compressor and box temperature (Tr1, Tr2, Tr3, Tr4). By knowing of pressure at suction (p1), the enthalpy into compressor is known. By assuming the process is isentropic (compressor), isobar (condenser and evaporator), and isenthalpy (expansion valve), the enthalpy into condensor, expansion valve and evaporator were known. In 60 minutes, compression work of air conditioning with heat exchanger is 31,588 kJ/kg, and without heat exchanger is 33,796 kJ/kg. Effect refrigeration average with modification is 155,55 kJ/kg and without modification was 153,40 kJ/kg so that coefficient of performance with modification more than without modification. Air conditioning with modification had initial refrigration rate was 67,193 J/s and 0,043 J/s at the end minute, meanwhile, refrigeration without modification had cooling rate at start 66,538 J/s and 0,935 J/s at the end.
Experimental Study of Acceleration Effect To Hydram Pump Performance A.A. Adhi Suryawan; Made Suarda
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (324.26 KB)

Abstract

The hydram pump is a motorless pump, which is its working mechanism use potential energy only. The hydram pump consists of a component called an air vessel. Until now, it is not exactly known yet what is the effect of air vessel to performance of hydram pump. To get the effect of air vessel to performance of hydram pump can be used indicator diagram. This research carried out by use of head and the length variation of drive pipe of the hydram pump. Then, characteristic in drive pipe and delivery pipe of the hydram pump were observed. The results show that the use of the air vessel in the hydram pump able to decrease the acceleration head significantly which happened in delivery pipe, that is 0,35 meters to 0,04 meters, so that the pumped water to the reservoir through delivery pipe is more stable. In addition, the efficiency increase from 17,03% up to 52,99%. So, the air vessel gives a big effect to the performance of hydram pump.
Study Experimental Distance to Pressure Coefficient Double Cylinders Positioned Alined Ketut Astawa; Sukadana -; Karnata -
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282 KB)

Abstract

Factors affecting of coefficient of pressure are fluid velocity, fluid density, fluid viscosity and geometry of surface which is pasted by fluid. This research is conducted by variation of some factors affecting value of pressure coefficient that are surface geometry including cylindrical shape and bluff body, and variation of free stream. The pressure to be measured is based by change of oil column length (r, mm) at incline manometer which is connected to pressure tap located on cylindrical surface. Pressure data collected based on three types of space tube variation, there are 1.2D, 1.7D, and 2.2D, and three types of cylindrical diameter variation there are 2”, 2.5” and 3”, and free stream is kept to be constant at 6 m/s. The results of research show that, the higher space tube affecting on the value and position of maximum pressure on the back cylindrical. Value and position of separation point is more to be back direction as increasing of free stream. Pressure drop happen on back cylindrical at high free stream.
Influence of Electric Current and Hard Anodizing Process Time of Aluminium toward Hardness and Layer Thickness I Gst. Ngr. Nitya Santhiarsa
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1224.503 KB)

Abstract

Influence of Electric Current and Hard Anodizing Process Time of Aluminium toward Hardness and Layer Thickness
Effect of Fiber Volume Fraction and Water Absorption toward Bending Strength of Coconut Filters/ Polyester Composite I Putu Lokantara; Ngakan Putu Gede Suardana; I Made Gatot Karohika
Jurnal Energi Dan Manufaktur Vol 3, No.2 Oktober 2009
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.291 KB)

Abstract

The variation of fibre volume and the duration of water soaking take influence on the mechanical properties of composite. This research aim is to know the influence of fraction volume fibre and soaking duration on the mineral watertoward the tensile strength and flexural of polyester-coconut-tapis composite. This research used coconut-tapis fibre which is cut 1 cm in length with 0%, 5%, 7,5%, and 10% fiber volume fraction, unsaturated-polyester (UPRs) matrix resin type Yucalac 157 BQTN-EX, and MEKPO hardener. The flexure specimen are made by press hand lay-up method and cut according ASTM D790-03 for the flexure test. The result of flexure test shows that the duration of soaking and the fiber volume fraction give a significant effect on the flexural strength of composite. The highest strength are reached by composite with 10% fibre volume on 48 hour soaking time equal to 41.994 MPa. The flexure modulus happenend shows increasing until 24 hour soaking time. The highest modulus are reached by composite with 10% fibre volume equal to 7.114 GPa while the lowest are reached by composite with 0% fibre volume equal to 3,023 GPa.

Page 1 of 2 | Total Record : 16

 1   2 

Filter by Year

2009 2009


Reset
Filter By Issues
All Issue Vol 6 No 01 (2023): April 2023 Vol 6 No 2 (2023): Oktober 2023 Vol 15 No 2 (2022) Vol 15 No 1 (2022) Vol 14 No 2 (2021) Vol 14 No 1 (2021) Vol 13 No 2 (2020) Vol 13 No 1 (2020) Vol 12 No 2 (2019) Vol 12 No 1 (2019) Vol 11 No 2 (2018): Published in Oktober 2018 Vol 11 No 1 (2018): Published in April 2018 Vol 10 No 2 (2017): Oktober 2017 Vol 10 No 1 (2017): April 2017 Vol 9 No 2 (2016): Oktober 2016 Vol 9 No 1 (2016): April 2016 Vol 8 No 2 (2015): Oktober 2015 Vol 8 No 1 (2015): April 2015 Vol 7 No 2 (2014): Oktober 2014 Vol 7 No 1 (2014): April 2014 Vol 6 No 2 (2013): Oktober 2013 Vol 6 No 1 (2013): April 2013 Vol 5 No 1 (2012): Oktober 2012 Vol 5, No.1 April 2011 Vol 4, No.2 Oktober 2010 Vol 4, No.1 April 2010 Vol 3, No.2 Oktober 2009 Vol 3, No.1 April 2009 Vol 3, No.2 Desember 2008 Vol 3, No.1 Juni 2008 Vol 2, No.2 Desember 2007 Vol 2, No.1 Juni 2007 Vol 1, No.2 Desember 2006 Vol 1, No 1 Juni 2006 More Issue