MEKTEK
Not a member yet
145 research outputs found
Sort by
ANALISIS NILAI KALOR SECARA EKSPERIMENTAL DAN TEORITIK DARI BRIKET ARANG KULIT KEMIRI
Full text linkThe aim of this article is to investigate heating value of candlenut shell Char briquette by experimental andtheoretical means. The experimental performs the High Heating Value HHV by Bomb Calorimeter PARR12611, and investigation in the theoretical ones by using Dulong’s formula.The result shows that the heating value of HHV is 10697,4 Btu/lbm, and by Dulong’s formula is10549,Btu/lb. There is 1,16% deviation of the two means because in the Dulong’s does not includedissociation effec
PENENTUAN ELEVASI PERMUKAAN AIR BERDASARKAN DATA SERIES TINGGI TEKANAN AIR
Full text linkSeries data of sea surface elevation is required to determine the parameters of tidal and wave parameters.The series data on sea water surface is irregular waves which are a superposition of several regular waves.Therefore, water surface parameters are usually based on statistical parameters. Statistical parameter ofwater surface can be obtained by performing frequency analysis on data series of water surface elevationobtained by field measurements. The water surface elevation can be also determined by converting dataseries of water pressure obtained by pressure sensors. In this paper, the water surface elevation that has asmall oscillation period is calculated based on two methods i.e. method of linear wave theory and methodTransform Fast Fourier (FFT). The water surface elevation that is calculated by using linear wave theorymethod is converted directly from data series of water pressure that consists of hydrostatic pressure anddynamic pressure. FFT method has two steps to convert water pressure to become water surface elevation.First of all data series of water pressure is fragmented into several regular waves based on their frequencies.Secondly, In order to reduce errors, water level fluctuations with high frequencies are removed from the databased on the maximum frequency that can be recorded by the measuring instrument. The maximumfrequency is determined by applying a deep-sea conditions and the depth position of the pressure sensor.Data used in the calculation is data from LIP11D experiments conducted at Delft LIP11D Hydraulic. Threedata sets of water pressure were used to compare the water surface elevation of direct measurements withtwo water pressure conversion results using linear wave theory and the FFT method. Results of analysisshow that the water surface elevation obtained by the FFT method gives good results when compared withthe results of direct measurement
PENERAPAN KEKANGAN MULTI TITIK DALAM ANALISA STRUKTUR
Full text linkThe paper presents the use of an algorithm to apply constraint to a governing system of simultaneous equations. The method consists of the implementation of the constraints directly on the system of simuitcineous gouerning equations prior to the solution operations. By the application of the method, problematic aspects such as possibility of the enlargement of the coefficient matrix size, or possible “ill-condition” of the matrix, can he avoided.As a by-product, the met hod can also be used as a tool to compute for support reactions. The method can he applied suitably well in a computer analysis program
PENGUJIAN KARAKTERISTIK MOTOR KAPASITOR UNTUK BERBAGAI NILAI KAPASITANSI
Full text linkThe aim of this research is to determine a value of capacities of capacitor on induction motor one phase with various capacities value. Data was collected with a testing procedure for several capacities value.The research comprised several capacitor value i.e, at respectively 2,533μF, 7,18μF and 8,24μF. The result of this research indicated that big more and more motor burden hence current emiting a stream of big more and more, good power factor progressively and efesiensi increase. And larger ones capasitor value will cause power factor of leading, voltage will precede curren
SOFTWARE REQUIREMENT DALAM MEMBANGUN SISTEM INFORMASI PELAYANAN PUBLIK
Full text linkThis study examines in depth about the software requirements to build a public information service system. Inprinciple, this research aims is to develop a plan needs public information service system that can assist andaccelerate the process of public service and reduce errors so that the information will result in services that can beaccounted for. This research is expected to contribute to the academic world is to add insight and knowledgeabout software engineering and information systems of public service.Software public information service system is designed with an interface easy to understand Indonesianlanguage, web application, multiple-login, can be integrated with computer networks, and built with PHPscript programming language, database used is MySQL, as well as web server used is AppServ 2.
MANAJEMEN PEMELIHARAAN FASILITAS DALAM PENGELOLAAN GEDUNG
Full text linkMaintenance frequently considered not urgently compared than construction, so the maintenance aspect is not be taken care. If the maintenance not doing, it will cause the economics value and physical value will be descending.The complex problems to maintenance the facility of building needs an examination toward maintenance management aspects. This research evaluates The Facility Maintenance Management in maintaining Building
KAJIAN HIDROGRAF SATUAN SINTETIK NAKAYASU UNTUK PERHITUNGAN DEBIT BANJIR RANCANGAN DI DAERAH ALIRAN SUNGAI KODINA
Full text linkAnalyse of the design discharge in the catchment area can be used by some methods, one of them is Synthetic Unit Hydrograph Nakayasu. In this method applying need presumably studied so that result got well enough. The Synthetic Unit Hydrograph Nakayasu try applied in catchment area Kodina in Central Sulawesi to look for the level of deviation of Synthetic Unit Hydrograp Nakayasu with the measured unit hydrograph. Modification of Equation of Synthetic Unit Hydrograph Nakayasu conducted by degrading basic formula the time peak (Tp) from value Tr and peak discharge (Qp) from equation T03 in the form of value α (discharge coefficient). As the result of research show happened by the big enough deviation to nature of the basic unit hydrograph of namely for the Tp = 26% and Qp = 22,40%. So, Synthetic Unit Hydrograph Nakayasu cannot be used direct to calculate the design discharge in catchment area Kodina. It’s required research of a kind to Synthetic Unit Hydrograp Nakayasu to look for the coefficient from value of Tp and Q
ANALISIS DAYA DUKUNG TANAH PONDASI DANGKAL DENGAN BEBERAPA METODE
Full text linkThis analysis aim to obtain variation of bearing capacity of soil foundation for the same case based on methods is Terzaghi, Meyerhof, Vesic, Hansen and Ohsaki. And gets comparison of bearing capacity value from some the methods.Method Terzaghi and Ohsaki to have bearing capacity value of soil foundation which approximately equal. Method Hansen and Vesic also has value tending to same, only Meyerhof having different value x'self. For incline load, method Hansen, Vesic is tnding to same and just Meyerhof tending to value differs in. But method Hansen and Vesic at various foundation breadth ( B) at foundation square and circular that is B > 0,5 m happened decrease of bearing capacity of soil foundation and at B ≥ 1,5 m increases returns to its the value
EFEK UDARA DI DALAM SISTEM REFRIGERASI
Full text linkThe performance of refrigeration system are affected by condenser, evaporator ,compressor and regulating valve. Besides cooling system itself air in the system are also considered to the performance. The aim of this research to investigate the effect of air in the refrigeration system that cause the performance of system. The result of this research indicates that coefficient of performance (COP)decrease falls to 37 % (from 8.4 to 5.28) due to the air in refrigerations system, on the contrary there is increasing about 40 % (from 25 kJ/kg to 35 kJ/kg)of energy in gernerating compresso
PEMODELAN NUMERIK ALIRAN FLUIDA PADA TIANG SILINDER DENGAN METODE BEDA HINGGA
Full text linkFluid flow in nature represent stream three dimension. For example, coordinate of Cartesian of streamrepresent variable of component instruct X, Y and Z. Equation of the Stream developed from ConservationLaws Of Mass and Punish Newton II, later recognized with equation of continuity and equation of motionmean of Navier Stokes.This Writing aim to to get model of numeric for case of simple fluid flow and the fluid flow which through ofpillar cylinder by using method different till. And also make analysis to result resolving of the problems.In test model program made to be conducted by using uniform stream for the ideal fluid by discrete 152 X 52Grid. This model tried to be made ideal fluid (unviscous, incompressible and unsteady). This model intendedto can see stability use of different model till in resolving of case of hydrodynamics and fluid dynamicsAnalyze performed within this writing for example every price early to model fluid case of uniform stream byusing program of Matlab 7.1 giving different result for the same case depend on initially condition. Fromresult analyze the way of handling of boundary condition very influence result of calculation. In general thecorrectness mount if order correctness of different operator till used moun