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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
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Sintesis Biopelumas Dari Minyak Biji Karet : Pengaruh Rasio Molar Antara Etilen Glikol Dan Asam Lemak Serta Waktu Reaksi Esterifikasi Terhadap Yield Biopelumas Fenny Lasma Hilde S; Irdoni Irdoni; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Lubricants used to protect engine components from worn-out. Rubber seed oil is an oil that can not be consumed cause toxicthus potentially used as raw material for biolubricants. This research purposes to study the synthesis of biolubricants from rubber seed oil to observe the effect of rasio mol between fatty acid and time of esterification reaction to the yield of the product. The research was begun with the extraction of rubber seed to get the oil. Then, the oil was degumming to purify the oil from the gum. Next, the oil was hydrolysis to make fatty acid and glycerol. Furthermore, fatty acids will be esterified with etylen glycol on a mole ratio of 3:1, 6:1 and 9:1, and time reaction for 2,3 and 4 hours, stirring speed 180 rpm, and the reaction temperature is 150 oC. The yield raised with the increase of fatty acid rasio mol and time of reaction. The highest yield is 79,772 % at 4 hours time of reaction with 9:1 rasio mol fatty acid and etylene glycol at stirring speed of 180 rpm. Flash point of the biolubricant is 387°C, pour point 7°C, density 0,9143 g/ml and viscosity index amounted 162,329.Keywords: biolubricants, esterification, etylen glycol, rubber seed oil, yield
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Cangkang Telur Itik Melalui Proses Pengendapan Dengan Variasi Rasio Ca/P Dan Kecepatan Pengadukan Toni Arissaputra; Yelmida Yelmida; Fajril Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Hydroxyapatite (HAp) is the most stable form of calcium phosphate and is widely applied in the medical field because it’s properties is similar to the components in certain organs of the human body such as bones and teeth. The aims of this study were to synthesis hydroxyapatite from duck egg shell by precipitation method, studied the effect of Ca/P molar ratio and stirring speed on the hydroxyapatite product and compare the result for such variable. Synthesis HAp was done by three steps. First step was calcination duck eggshell to CaO. Second step, made PCC (Precipitated Calcium Carbonate). Third step, synthesis HAp used precipitation method. Variables used were molar ratio Ca/P 1.67;1.77;1.87 and stirring speed 200, 250, 300 rpm. HAp product was analized by FTIR, XRD, SEM-EDX and BET. The best HAp product was produced at a Ca / P molar ratio and stirring rate at 1.67 and 300 rpm respectively. HAp crystals are hexagonal with a diameter of 23.086 nm. HAp has high purity without contaminated with any other elements and is in the form of agglomerates. The molar ratio of Ca / P results was obtained at 1.55 and the surface area of the HAp was 55.929 m2/g.Keywords : Calcium Phospate, Duck Eggshell, Hydroxyapatite, Precipitation, Synthesis.
Kalibrasi Simulasi Breakwater Di Pantai Bantan Kab. Bengkalis Doli Ananta Putra; Bambang Sujatmoko; Manyuk Fauzi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Bantan Coast in Bengkalis Island that suffered worst abrasion due to wave attack. Protection of abrasion area against the wave can be done by proper lay-out of breakwater with certain configuration. To get the optimal configuration of breakwater, wave pattern around the breakwater were analyzed quantitatively. It was conducted to obtain the optimum condition of wave height reduction produced. Evaluation of breakwater lay-out effect to wave pattern can be done by numerical model approached. Wave pattern simulation that occurred due to the breakwater was done by Surface water Modelling System (SMS) - CGWAVE software module. This module is a 2-D depth average numerical model using finite element model. To get accurate simulation, a deviation of the numerical result and the measurement result at several locations was used as the indicator parameter in the calibration process. Based on the forecasting of the empirical wave method, the period of 5.4 seconds; 1.30 meters high as data input. Calibration Results of numerical models of semicircular radius (R = 2000m) in modeling to achieve wave height (H = 1.1m). Keywords : Bantan Coast, breakwater simulation, SMS-CGWAVE
Prestasi Alat Pendingin Termoakustik Dengan Variasi Bentuk Stack Mitha Tri Indraswari; Dinni Agustina
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The use of conventional cooling machines that have an impact on the environment because it uses refrigerant gas containing CFC and HFC gases that are harmful to the atmosphere. One alternative to the cooling machine is a thermoacoustic cooling system. The thermoacoustic cooling system is a system that converts high-amplitude sound waves into heat energy which produces temperature changes. This system is called environmentally friendly because it uses air conditioning or noble gas cooling media. The main components of the thermoacoustic system are the resonator tube, the stack, the working fluid and the loudspeaker. In this study the working fluid used is air. The shape of the stack and stack position affect the performance of the cooling device. Thermoacoustic cooling devices using a stack of mica plastic material with a thickness of 0.5 mm and a length of 9 cm have been designed and operated on a resonator tube with a diameter of 5 cm and a length of 60 cm. The test was carried out experimentally using a loudspeaker sound source at a resonant frequency of 145 Hz. The ability of the cooling device based on results of the stack plate parallel produces a temperature difference at both ends of the stack of 4.31OC at 28OC ambient temperature. Keywords:Thermoacoustic, cooling device, COP
Analisis Kinerja Sistem Proteksi Berdasarkan Frekuensi Gangguan Di Gardu Induk 150 KV Garuda Sakti Ardianto Ardianto; Firdaus Firdaus; Noveri L M
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Abstract

With the disruption that can not be predicted, we need a safety equipment (protection system) are precise and reliable. The purpose of this study was to determine the quantity of interference, protection system performance, reliability and power transformer protection system installation requirements in the area power transformer substation of 150 KV Garuda Sakti. Data obtained from the recording in substation Garuda Sakti analyzed using Descriptive Analysis Techniques percentage. The survey results revealed that from 2013 to 2015 occurred 28 times transformer disorders namely: in 2013 occurred 9 times transformer interference, in 2014 occurred 7 times transformer interference, and in 2015 the 12 times the transformer interference. Protection system that works in the event 28 times disruption in Substation Garuda Sakti 2013 to 2015 there are 6 kinds of relays, namely: Rele differential, Rele OCR / GFR, Rele OVR / UVR, Rele REF / SBEF, Rele UVLS and Rele DF / DT is the whole relay has a 100% reliability and got up fairly well. From 2013 to 2015 the reliability of Power Transformer Substation of Garuda Sakti by long outages caused by the interference, the Transformer Power1 reaches the percentage 99.97203%, the Transformer Daya2 reaches 99.983364%, the Transformer Daya3 reach 99.99258% and the Transformer Daya4 reaching 99.99081%. From the data analysis, in general, the protection system in the substation Garuda Sakti it can be argued that meets the requirements of the protection system selectivity, Reliability, Free Labor, Sensitivity and Economic.Keywords: Gardu Induk, Fault, System Protection, Reliability Substation, PLN
Pengaruh Pasir Pulau Bungin Kabupaten Kuantan Singingi Pada Campuran Laston Lapis Fondasi/Asphalt Concrete Base (AC-BASE) Arief Rahman; Sri Djuniati; Gunawan Wibisono
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Sand of Pulau Bungin is a natural sand that comes from Batang Kuantan River, Kuantan Singingi Regency. The existence of sand of Pulau Bungin makes development progress in Kuantan Singingi Regency because easily obtained, and more economical no need to bring sand material from other area and not have to go through stone breaking process by stone crusher. Based on the Bina Marga Specification 2010 Revision 3, the use of natural sand for asphalt concrete mixture (AC) should not exceed 15% of the total aggregate mixture weight. Therefore, we need to know the efficiency of using natural sand in concrete asphalt mixture (AC) for optimal utilization. This research aims to find out the optimum asphalt (KAO) and to know Marshall's characteristics whether to meet the Bina Marga Specification 2010 Revision 3. The natural fine aggregate variation of sand used in this research is 0%, 5%, 10%, 15% and 16 % of the total weight of the aggregate mixture. The addition of natural sand in the asphalt concrete mixture of the asphalt concrete base (AC-Base) causes the value of optimum asphalt (KAO) to decrease. On the mixture asphalt concrete base (AC-Base), 5% of the sand content of the 5% content of the optimum asphalt content (KAO) was increased by 6,20% and the largest stability was 3341 kg. Without considering the limits of natural sand usage as set out in the Bina Marga Specification 2010 Revision 3 then the addition of natural sand is still possible in the asphalt concrete base (AC-Base) until 16%.Keywords: Natural sand, asphalt concrete base (AC-Base), a general Specification Bina Marga 2010 Revision 3 and characteristics of Marshall.
Perbandingan Pengaruh Air Gambut Dan Air Hujan Terhadap Asphalt Concrete – Wearing Course (AC-WC) Harpian Surya; Alfian Malik; Yosi Alwinda
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The road pavement that was inundated by peat water would be easily damaged since asphalt is quickly oxidized by acid in peat water. This damage could also occurred due to inundated by rain. The road pavement submerged by rainwater will make aggregate and asphalt easily separated. This study aims to determine the impact of peat water and rain on the characteristic of AC-WC asphalt through Marshall tests using asphalt penetration 60/70. The tests were carried out using the Marshall tests based on the Indonesian Standard from Bina Marga 2018. The specimens were soaked for 24, 48, 72, and 96 hours in the temperature of 60°C. The tests results shows that immersion in the peat water and rain could decreased the stability of asphalt value as soaking time increased. Based on the results, it is shown that the asphalt has stability values of 1103.68 kg, 948.81 kg, 854.48 kg, and 780.55 kg, respectively, after soaked in peat water for 24, 48, 72, 96 hours. Also, it is shown that the asphalt has stability values of 1206.43 kg, 1185.68 kg, 978.94 kg, dan 889.85 kg, respectively, after soaked in rain water for 24, 48, 72, 96 hours. In peat water, the asphalt has RSI value of 95.83%, 82.38%, 74.19%, 67.77%, respectively, after soaked for 24, 48, 72, 96 hours and in rain water, the asphalt has RSI value of 97.18%, 95.51%, 78.85%, 71.68%, respectively, after soaked for 24, 48, 72, and 96 hours. It was obtained that asphalt soaked in rain water has a better RSI value than asphalt soaked in peat water and it is complied with the requirement of Bina Marga 2018 (90%).Keywords: Rain, peat water, AC-WC
Densitas, Nilai Slump, Dan Kuat Tekan Beton OPC Dan OPC POFA Dengan Campuran Air Gambut Terpapar Di Lingkungan Gambut Fadillah, M Lucky; Ismeddiyanto, Ismeddiyanto; Olivia, Monita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This research study aimed to test the density of fresh concrete, slump value and compressive strength of concrete using OPC cement and concrete with composition of 90%OPC+10%POFA (palm oil fuel ash). That concretes mixed with peat water. pH of peat water used ranges from 3.0 to 4.0. These specimens are cast in situ. Direct specimen exposed and soaked for 28 days in the peat canal. OPC concrete that mixed with peat water generate density values were small. An increase in the value of the slump of OPC concrete mixed with peat water compared to the controling OPC. As for concrete of 90%OPC+10%POFA slump value decreases. Compressive strength of OPC concrete and concrete of 90%OPC+10%POFA were soaked for 28 days in the peat showed relatively similar results compared to the normal condition.Keywords: OPC, palm oil fuel ash (POFA), peat water, peat area
Tinjauan Kelayakan Finansial Pada Hotel Berjenis Kondotel Studi Kasus : Proyek Pembangunan Kondotel Pekanbaru Park Eko syalahuddin Sulton; Hendra Taufik; Mardani Sebayang
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Pekanbaru economic growth is relatively advanced to make this city a place to invest in the calculated by the investors one of them is investment in the field of hospitality. Investment inthe hospitality sector has a big risk if not prepared thoroughly, this is because in its construction requires a very large capital, therefore it is very important to review and analyzethe financial feasibility. In this research, it is reviewed about the financial feasibility of Condotel type hotel, which is in Kondotel Pekanbaru Park which is a hotel owned jointly by several owner and managed by hotel manager and its profit and profit will be shared between fellow hotel owners and managers. Financial analysis is done by analyzing the calculation of Net present value, benefit cost ratio, internal rate of return, payback period and also sensitivity analysis. The results obtained are total investment kondotel Rp. 192.670.744.974,35 with NPV of Rp. 67.877.696.368,23, BCR of 1.2, IRR of 24,97% greaterthan the return current of 13.5% and PBP for 9 years 7 month 17 days (project plan life for 50 years). Overall the investment project for the development of Kondotel Pekanbaru Park is feasible to build with the hotel occupancy rate of 66%. Investor standard room or SMI get profit of Rp 33.102.537,58 / year and free stay for 21 point / year. While the investor room suite or SMI corner get a profit of Rp 40.138.145,99 / year and free stay for 21 point / year with discount payback period in year 14.Keywords: Financial Analysis, Condotel Pekanbaru Park, Occupancy Hotel, Sensitivity Analysis, Investor.
Analisis Pengaruh Keberadaan Mall Ciputra Seraya Terhadap Kinerja Jalan Riau-Pekanbaru Zulfahmi Zulfahmi; Elianora Elianora; Ari Sandhyavitri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The high growth of the number of vehicles will cause a smooth flow of traffic, and an increase in the number of population is also greatly effect the congestion that occurs. The number of vehicles and activities in Pekanbaru city causes social and economic problems that very depend on road transportation. This problem arises because of an imbalance between increased vehicle owners and the growth of road infrastructure. Traffic congestion is one problem that has long been faced in the Pekanbaru region. As seen on the roads of Riau as one of examples of standards that is experiencing congestion. This research aims to know the influence of the existence of the Mall Ciputra Seraya on performance of Riau Street caused by activities such as vehicles exit sign in the mall, pedestrians, and vehicles parked or stopped at the roadside. Traffic Data, Side Barriers Data and Traveling Time Data collected through surveys during rush-hour on Saturday. Analysis of road performance based on the Indonesian Road Capacity Manual (MKJI) method 1997 to get the value of the capacity, the Side Barriers, the degree of Saturation of the road and velocity. As for the capacity, the Riau road at 3046 smp/hour and the highest peak current occurred on Saturday at 16.30-17.30 amounting to 2333 pcu/hour, Side Barriers 513 with class categories High Side friction (H), Degree of Saturation (DS) is 0.77, Vehicle speed 26.9 km/hour and included on the level of service is D i.e. approaching unstable flow (low speed).Keywords: Traffic performance, Congestion, Side Barriers, Capacity, Degree of Saturation, Velocity

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