cover
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota bengkulu,
Bengkulu
INDONESIA
Teknosia
Published by Universitas Bengkulu
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Arjuna Subject : -
Articles 52 Documents
performance evaluation of the signalized intersection of Jalan Danau Bengkulu City Bahri, Samsul; Mawardi, Mawardi; Lestarida, Lestarida
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

This study aims to evaluate the performance of the signalized intersection of Danau street Bengkulu City. The Evaluation method is using Indonesian Highway Capacity Manual (MKJI) 1997. The results show  the approach of Danau 01 street has a degree of saturation (DS) of 0.96 with the level of service (LOS) D;  the approach of  Zainul Arifin street has a DS of 1.42 with the LOS F;  the approach of  Danau 02 street  has a DS of 0.90 with the LOS C and  the approach of  Jaya Wijaya street has a DS 0.72 with the LOS B. This condition needs the optimization of traffic signal by adding the width of the intersection of the approach so that the DS ? 0.75. The optimization results conslude that the approach of Danau 01 street has a DS of 0.75 with the LOS D;  the approach of  Zainul Arifin street has a DS of 0.75 with the LOS C;  the approach of  Danau 02 street  has a DS of 0.75 with the LOS B and the approach of  Jaya Wijaya street has a DS 0.75 with the LOS B.
the influence of surface crudity of coarse aggregate to concrete strength Mawardi, Mawardi
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

The aim of this research was to find out the influence of  surface cruduity  value of coarse aggregater  to pressure strength  of concrete. The water ratio  that aplicated was 0,5. The percentation of surface cruduity  value  were 100%, 50%, and 0%  of the specimen. 9  cylinders of 150 x 300 mm specimens  had been tested. It was showed the surface cruduity  value  to the concrete cause  the strengths gettinglower as the percentation getting smaller (average 12 %)
experimental study of refrigeration system employing 134a refrigerant type Puspawan, Angki
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

Developments in science and technology so rapidly, so many tools and technologies that industry can be created for human needs. Refrigerant is the basic ingredient used in refrigeration systems. Refrigerants containing CFC (Chloro Fluoro Carbon) and HCFC (Hydro Chloro Fluoro Carbon) in fact have a negative iMPact on the environment which could reduce the ozone layer can cause global warming. Due to the above then be made to regulations that prohibit the use of a compound containing CFC and HCFC. As an alternative substitute materials used R-134a refrigerant is environmentally friendly (without CFC).Refrigeration is the process of taking heat from one object / part, which causes the temperature of the object/part becomes lower than the ambient temperature in which the object is located.To find out COP at Refrigerant (Coefficient of Performance at Refrigeration) conducted several phases of pressure knowing that the calculation of (P) and temperature (T) so obtained enthalpy (h) any condition which is used to find heat at evaporator (qEvaporator), work of compresor (Wcompresor), heat at kondensor (qCondensor). In the process of testing apparatus used in the refrigeration system has not changed.From the test results, more time is needed then the COP at refrigerant price increases, which amounted to 4.355448 highest COP at refrigerant price at the time (minutes) 80 and 100 while the lowest price for 4.079035 COP at refrigerant at the time (minutes) 10.
Ini Judul Lubis, Amwaluddin
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
effect of valve gap on four strokes engine performance Nuramal, Agus; Witanto, Yovan
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

Valve adjustment aims to provide sufficient space expansion for valves so that when the engine at operating temperature, valves can be fixed and sealed. Result of the improper valve gap can is decreasing engine performance. This study aims to analyze the reduction of engine performance as a result of improper valve gap. The study was conducted by operating the engine in two stages, without heating and with heating at various slit valve. Engine performance is measured by the maximum achievable revolution of machine. The results showed that the exhaust valve gap gives greater influence than the intake valve gap. This is evident from result showed that after heating process, the engine achieved higher revolution compared by unheating process. Another result of the study showed that wider valve gap provided positive effect on the heating process. The heating effect can be minimized by widening valves gap, which the maximum revolution of the engine before heating process is about 83% of the maximum engine revolution by heating process
failure analysis of crank case faced-milling in rotary milling machine van Hoten, Hendri
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

Crank case as the foundation for almost all engine parts are mounted her machine. Such as transmission gear shaft, crank shaft, shaft coupling, bushing and various other components. All of components are related to each other, if components are not installed with precision, the machine rejected. Manufacturing of the crank case important process is the face milling. Face milling is done on both sides of the crank case R & L, which will both be united. Therefore, it begins with the die casting process, face milling, drilling, boring, reaming, spot facing and tapping. The most takes surface roughness 12.5 ?m, flat and level, because if there are scratches on the crank case surface after combined oil seepage will occur. It is already a reject. It required an analysis of the failure of face milling process by considering several things, namely machining parameters are used, the condition of the cutting tool,the installation of the crank case on the jig and the coolant used. Analyzing the four factors above, it is hoped will be able to optimize the face milling process as well as reduced product reject.
Designing the device to detect an early warning of the earthquake potentially causing tsunami via audio signal transmision through electrical circuitry medium Priyadi, Irnanda; Wijaya, Meiky Enda
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

Tsunami can be known using detect of earthquake magnitude that cause of tsunami (>6.3 RS, on shallow water) . The earthquake of detection process that cause of tsunami still using manually seismograf device which not quite effectively as information present before tsunami happened. The solution of the problem above is by using magnetic levitation concept as a vibration sensor of earthquake detection. Furthermore that information of earthquake directly delivered to microcontroller system by electricity medium and it giving of warning that tsunami will be happened. The information of detection designing and earthquake warning cause of tsunami by electricity medium can be used as early warning system of earthquake
analysis of characteristic and peak discharge at the watershed Kungkai river of Kabupaten Seluma Amri, Khairul
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

This study aims to determine the value of cracteristic and determine the peak discharge at the watershed Kungkai water . Analysis of rainfall frequency analysis to determine the design rainfall and peak discharge calculations using the rational method . Tofografi maps derived from soil slopes > 8 % had extensive 16208.7262 ha ( 48.987 % ) , 8-15 % slope has an area of 4700.8116 ha ( 14.207 % ) , 15-25 % slope has an area of 5769.5998 ha ( 17.437 % ) , 25-40 % slope has an area of 5270.7641 ha ( 15.930 % ) , slope > 45 % by having broad 1138.1056 ha ( 3.44 % ) . Land use in the watershed area Kungkai based on each type of land cover , land cover types dominated by rubber plantations of 9406.143 hectares ( 28.428 % ) , and oil palm plantations for 6684.0746 hectares ( 20.20 % ) . For the distribution of soil types in the watershed is dominated by the type of soil Dystropepts Kungkai , hydraquents and tropopsamments . Rainfall annual average 1797,63 m. The watershed Kungkai is the right pattern of rainfall distribution is the distribution of water in the watershed People Kungkai Log III and rain design for maximum rainfall data for a period of between 2 , 5 , 10 , 20 , 50 , 100 years is 61.98 mm , 04:04 mm , 136.89 mm , 183.87 mm , 222.77 mm and 265.04 mm . Peak discharge that occurs when the 2 -year anniversary is m3/second 83.075 , 152.580 m3/second was 5 years old , 10 years is m3/second 215.286 m3/second was 25 years , 50 years is 412.142 m3/second , 100 years is 526.564 m3 / sec .
the effect of volume fraction and fiber Pandan Laut (Pandanus Tectorius) setting on composit mechanics with epoxy resin as the matrix Hestiawan, Hendri; Kurniawanto, Dwi
Teknosia Vol 2, No 12 (2013): VII, September
Publisher : University of Bengkulu

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

Abstract

abc
Analisa Pengolahan Kelapa Sawit dengan Kapasitas Olah 30 ton/jam Di PT. BIO Nusantara Teknologi Suandi, Nurul Iman Supardi, Angky Puspawan, Agus
Teknosia Vol 2, No 17 (2016): X, September
Publisher : University of Bengkulu

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

Abstract

Palm oil is one commodity that has a large contribution to the Indonesian economy. Nowadays, Indonesia is the largest CPO producer in the world. The many benefits of Crude Palm Oil (CPO) and Palm Kernel (PK) for the industry and the increasing demand for world markets, the processing industry of CPO and PK has good prospects in the future. Knowing the percentage obtained from each stage of the production process into oil palm and palm kernel becomes very important to maintain stability of production conducted. Where, determine the percentage yield of the treatment will be a benchmark in getting maximum results from processing without many losses.The main purpose of palm oil factory is to produce high CPO and PK, and the achievement of quality of product. Research carried out by observation, data collection as an input in calculating the result production process of palm oil mill PT. Bio Technology Nusantara (PT. BNT) with a production capacity of 30 tons / hour. Study of the production process and the calculation results of the factory production referable in estimating the achievements of PT. BNT and correction when needed. Palm Oil Factory PT. BNT is estimated to produce 21.97% CPO and Kernel 6.4% of FFB processing capacity of 30 tons / hour.