Journal of Engineering and Scientific Research (JESR)
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Feasibility Study of Solar Power Plant in the Rectorate Building of Lampung University Using the Ongrid System
Full text linkThis research aims to analyze the technical and economic feasibility aspects of the construction of solar power plants in the Rectorate building of Lampung University. Technical aspects are calculated how much electrical energy is generated, the number of components and systems used. Then the economic aspects are calculated using the net present value (NPV) and profitability index (PI) methods to determine profitable or detrimental investments in the future. The electrical energy generated by solar power plant is affected by solar radiation based on RetScreen data and the number of solar modules installed on rooftop buildings. The results of this study showed that the construction of solar power plant in the Rectorate building of the University of Lampung is feasible to built using ballast installation techniques and on-grid systems, based on economic aspect, it is feasible.
Keywords: RetScreen, rooftop, on grid, Unil
The ratio of Indonesia BMKG agency and TRMM satellite Rainfall Data in West Java Province by Using Statistical Parameter and Correlation Analysis
Full text linkWeather observations can be done in two ways, namely weather observations based on weather stations and based on remote sensing such as satellites. One of these weather study data is rainfall measured from the BMKG rain observation post and TRMM satellite observations. To see the pattern of the distribution of rain that has occurred, the two weather observations can be connected as a reference for the distribution of rain. The purpose of this study was to analyze the correlation value of rainfall data between BMKG and TRMM by looking at the comparison graph and analyzing the comparison of statistical parameters. This research was conducted using daily rainfall data from 1998-2018 at four rain stations in West Java Province and taking descriptive decisions in the form of pictures and graphs in the form of daily, monthly and annual data. Based on the analysis results, the largest correlation value is in the annual cumulative with a value of 0,88-0,94, the smaller the number of days, the smaller the correlation value. The BMKG and TRMM rainfall data have relatively the same pattern, but the maximum data have differences so that it reduces the correlation value. In the Statistical Parameter analysis, it can be stated that the difference in the values ??of the statistical parameters is directly proportional to the daily cumulative, that the difference in the median and mean values ??in the BMKG and TRMM data is greater in the data with a larger cumulative. Meanwhile, for linear regression analysis, it was found that the greatest value was the cumulative 1-year value with a coefficient of determination from 0,78 - 0,89
Assessment of Information Technology Governance Implementation Based on COBIT Framework 5 Focus on DSS 02 Subdomain (Deliver, Service, And Support) (Case Study of Bank XXX Branch X)
No full textAbstract— Most of companies and organizations have used information technology to improve the effectiveness and efficiency of business performance. In consequence it is necessary to have good information technology governance so that the desired goals are achieved. Bank XXX Branch X always strives to provide the best, provide excellent service and work optimally. Despite using reliable information technology, when the implementation there are still some obstacles that is accumulation of service requests in the IT division of Bank XXX Branch X. In this study, an assessment of information technology governance was carried out based on the COBIT 5 framework focusing on DSS02 subdomain. Data collection methods consist of problem formulation, literature study, observation, interviews and questionnaires. The data analysis method is carried out by calculating the results of the questionnaire answers using a Likert measurement scale to get the current capability model level, expected capability model level and risk value, calculate the gap and provide recommendations for improvement. The results of this study show that the value of the current capability model in DSS02 sub domain is 4.22, the expected capability model is 4.47 and 14 recommendations for improvement are obtained.
Frequency Stability Control In Low -Inertia Power System Using Virtual Synchronous Generator
Full text linkThe stability of the electric power system is divided into transient stability, steady state stability and dynamic stability. Things that affect the performance of the generator include the addition of generators, changes in the load that vary in the system which have an impact on system stability and the distance between the generator and the load. The addition of a Virtual Synchronous Generator (VSG) is needed to improve the power system that is integrated with Renewable Energy Systems Source in maintaining system stability. When the integration between conventional generators and Renewable Energy Systems Source without Virtual Synchronous Generator (VSG) has a frequency response of 58.2 Hz when the generating capacity is -40% of the initial state, while integration between conventional generators and Renewable Energy Systems Source with Virtual Synchronous Generator (VSG) has a steady state response of 60 Hz even though the generating condition is 40% of the initial capacity of the generator. This means that the Virtual Synchronous Generator (VSG) can stabilize the return frequency in its nominal value on the system.
Keywords : Inertia, Conventional Generating, Renewable Energy Systems Source, Virtual Synchronous Generator (VSG).
The Utilization of Kepyar Castor Oil (Ricinus Communis) and Alumina Silica Catalyst in Alcoholysis Process
Full text linkCastor oil is one of the vegetable oils that has not been used optimally. In the manufacture of biodiesel, vegetable oil is needed as a raw material. By using an aluminum silica catalyst which is a waste from the petroleum cracking process at PT. Pertamina RU III Palembang. This research aims to prove that the raw material for vegetable oil in the form of castor oil can be used as raw material for making biodiesel with the help of waste catalyst from the cracking process of Pertamina Unit III Palembang as a catalyst process and with the alcoholysis method. Based on the research that has been done, it can be concluded that castor oil can be used as raw material for making biodiesel using heterogeneous catalysts which are used as catalysts for fracturing crude oil at PT. Pertamina RU III, and with operating conditions of temperature 383oK, stirring speed of 300 rpm, ratio of oil and ethanol 5 mgek/mgek, and reaction time of 60 minutes. With the above operating conditions, the biodiesel conversion from the alcoholysis process was obtained at 94.08%. So that further research can be developed on the manufacture of biodiesel with castrol oil as raw material with the help of a catalyst reaction from cracked crude oil from PT Pertamina RU III Palembang
Simulation Of Irrigation Area by Using Dependable Flow Basic Year And Basic Month
No full textThe purpose of this study was to analyze the availability of irrigation water from the reservoir by using a dependable flow of basic month, analyze the availability of irrigation water from the reservoir by using the dependable flow of basic year and compare the calculation of the availability of irrigation water from the reservoir by using a dependable flow of basic month and the basic year, Where which is more effective. The research was conducted using secondary data, the research location was in Way Rarem Reservoir, data obtained from the Mesuji-Sekampung River Basin Center and the North Lampung Geophysics Station UPT. Analysis of the data calculates the availability of irrigation water and irrigation water needs, to determine the maximum irrigation area that can be irrigated. The availability of irrigation water is made of two types of calculations, first using the basic month dependable flow with a reliability of 40%, 50%, and 60%, and the second with the basic year dependable flow from 2011-2020. Irrigation water needs are calculated using a modified penman, with a cropping pattern used of Paddy-Paddy-secondary crop and 4 groups. The results of this study are the basic year dependable flow gets an irrigation area of ??1328,65 Ha and the basic month dependable flow gets an area of ??11186,83 Ha, the basic dependable flow area gets a larger area than the basic month dependable flow, the maximum area of ??dependable flow basic month and basic year in Group IV started on January 1.
Analysis Of Banana Plant Disease Characterization Using Thermal Camera With Tressolding Method
Full text linkBanana is a fruit plant that is widely produced in Indonesia. Unfortunately, this plant is very susceptible to diseases which can reduce the quality and quantity of the crop. This paper proposes disease detection in banana plants using a thermal camera. The detection is carried out using image processing techniques with multilevel thresholding methods. The image is captured using a thermal camera, then the image is preprocessed to suit what is desired. After that, so that the position is the same as the image taken using a digital camera, the image produced by the thermal camera is carried out by an image registration process. The image processing result is compared with the ground truth image obtained from a digital camera to determine the effectiveness of the proposed method. The effectiveness of the proposed method is measured using the parameters Recall, Precision, F-measure, and Accuracy. The effectiveness of the proposed method is quite effective because it produces parameter values above 80%, namely the recall value of 86,59%, the Precision of 99,1%, the F-measure of 92%, and the accuracy of 89,78%
Design and Development an Ergonomic Transfer Lifter Assistor From Wheelchair To Bed Transfer For Patients Under 50kg
Full text linkMoving a patient from their bed to some other places for daily routine is such hard work. Caregiver usually using a wheelchair to move a patient from place to place. Nevertheless, they are facing a problem in lifting the patient from bed to wheelchair. The caregiver needs to use lots of energy to lift the patient into a wheelchair, and it may take a long time. This study focuses on design and develop a transfer lifter assistor to assist the caregiver move the patient from bed to another place. It was flexible and easy to conduct. This innovation's advantages are that the height could be adjusted, making the patient more comfortable to sit on from a bed. The size could be adjusted up to 3 and a half feet. The structure mostly from steel and can be disassembled for storage purposes. The result shows that Transfer Lifter Assistor can perform effectively to lift patients with a maximum weight of 50 kilograms. It can support one patient at a time. This innovation has been successfully produced with cost-effective and can be owned by everyone
Effect of Added Pectin and Microcrystalline Cellulose (MCC) on Capsule Shell Quality
Full text linkThe objective of this study was analyzing the effect of the added pectin and microcrystalline cellulose (mcc) on the capsule shell quality. The method used in this study was by combining the pectin and microcrystalline cellulose composition on capsule shell manufacture. The formulation used to test the capsule shells was through 1 gram, 2 gram, 3 gram of pectin; 0 gram and 1.5 gram of microcrystalline cellulose; 1 gram of glycerol; and, 1 gram of carrageenan. The experiment tests used in this study were through the organoleptic test, the capsule weight test, the moisture test, the pH test, the dissolution time test, and the capsule-length test. The result of this study showed that the recommended formulation used to manufacture the hard capsule shells was through 3 gram pectin and 1.5 gram microcrystalline cellulose. The required temperature to heat the pectin and microcrystalline cellulose was at 90oC with 2.5-hour heating time. The characteristics of the manufactured capsule shells were that it had a turbid colour and irregular shape, the surface was not smooth and the disintegration time was 9 minutes and 21 seconds.
Keywords: Capsule Shell, Microcrystalline Cellulose, Pectin, Variation, Testin
Mechanical properties improvement of Self Compacting Concrete (SCC) using polypropylene fiber
Full text linkSCC (self-compacting concrete) is a type of concrete that can compact itself without the help of external compaction. Thus, it can fill all parts of the formwork that are narrow and have tight reinforcement. A problem that often arises in the use of SCC is the segregation of concrete mixture, which reduces the strength of the concrete. This paper presents the effect of polypropylene fiber on the fresh concrete workability, compressive strength, splitting-tensile strength, and flexural-tensile strength of SCC concrete. The variations of the polypropylene fiber added to the SCC mixture are 0%, 0.05%, 0.067%, 0.1%, and 0.15% of the concrete’s volume, with a water-cement ratio of 0.5 and 0.38 and dense-graded and gap-graded coarse aggregate. Each concrete variation is made into cubes (150x150x150 mm3) for the compressive strength test, cylinders (dia.150mm; height 300mm) for splitting-tensile test, and prisms (100x100x400 mm3) for the flexural-tensile test. The experiments were carried out with concretes with the age of 28 days. The result showed that, polypropylene fiber could reduce the segregation in the SCC concrete mixture. The optimal polypropylene fiber percentage is 0.05%, which could improve the compressive strength by 12.2%, the splitting strength by 17.7%, and flexural strength by 322.3% compared to SCC concrete without polypropylene fiber