IJET Vol. 3, Issue 1, March 2017
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International Journal of Engineering Technologies (IJET) Dergisi / International Journal of Engineering Technologies (IJET)
Güncel Gönderiler
Öğe A Case Study for Estimation of Heating Energy Requirement and Fuel Consumption in a Prototype Building Using Degree-Day Method in Kocaeli(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-04-20) Aktemur, CenkerEnergy is a requirement of all industrialised nations, and variations in its availability can be dangerous and disruptive. The majority of the energy consumed in buildings is spent for heating and cooling to ensure the thermal comfort of human beings in all parts of the world. Energy analysis plays a vitally important in the design of heating, ventilation and air conditioning (HVAC) systems at affordable and efficient cost in residential areas. Buildings are in need of heating in cold weather. The mean daily outside air temperature is an important guide in predicting the amount of fuel needed to heat residential buildings. The amount of fuel required to heat an area, a city or a region can be accurately forecasted based on the outside air temperature. One of the well-accepted methods internationally is the heating degree-day (HDD) method, which is employed for the energy analysis. This paper considers for İzmit, the capital district of Kocaeli province, which is located on the western coast of Turkey and aims to calculate the annual heating energy requirement and natural gas consumption at a base temperature of 15oC by considering different type of glass, glazing area percentage (GAP), air exchange rate (ACH), and the number of people (n) living in a prototype building. It was predicted that in the worst condition (single-glazing), natural gas consumption would be about fourfold higher than the best condition (triple-glazing) if it is thought that 60 people live in an apartment building.Öğe Light Wavelength and Power Quality Characteristics of CFL and LED Lamps under Different Voltage Harmonic Levels(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-04-20) Dawood, Kamran; Alboyacı, Bora; Şengül, Mehlika; Tekdemir, İbrahim GürsuConventional light sources are less efficient as compared to the light emitting diode and compact fluorescent lamps. Conventional incandescent filament lamps are resistive and therefore do not depend on power quality parameters. In the electric power system, nonlinear loads are increasing rapidly and the high content of harmonic due to the nonlinear loads cannot be neglected. Harmonic generation from the light emitting diode and the compact fluorescent lamp is one of the main problems for power quality. In this study, the light efficiency and electrical characteristics of the light emitting diode lamps and compact fluorescent lamps are evaluated under various voltage harmonic levels. The results show that light emitting diode, produces more harmonics as compared to the compact fluorescent lamps, with the increase of the voltage harmonic distortion from 0.7% to 3.52% in the light emitting diode, current harmonic increased from 140% to 192%. The results also show that increase in voltage harmonic distortion just not only increase current harmonics distortion but also affect the light wavelength of the lamp.Öğe Evaluation and Scheduling of the Car Manufacturing Factory’s Employers’ Work Shifts(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-04-20) Baran, ErhanThis study is made an application related to the regulation of working hours of workers in car factory. This factory has thick to work 24 hour shifts need to work with the system as needed. In this study, which is open 24 hours a day and 7 days in a car factory, it has made application serving with 3 shifts. The attention of employees serving in this industry and are crucial to productivity. Mistakes will be made, which can lead to irreparable consequences. The working hours of workers at the factory scheduling process is usually carried out by personnel chief in the factory. In this study, in consultation with the chief engineer in charge of drafting the schedule and made relevant studies were identified by examining the constraints to be considered. Then it established a mathematical model that can be used in a general sense with integer linear programming techniques. Established model applies to data in a unit of a car factory and has been found to be optimal solutions with the help of LINGO software. Unlike other shift scheduling problems in the literature, this study aimed to run for a minimum of additional workers outside the factory. There is also a model that defined the mathematical model and skillful workers to shift some concessions to be assigned any number of workers in particular experience has been established.Öğe Layout Effect of Manufacturing Workplace to Illumination of Working Position(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-04-20) Dupláková, Darina; Flimel, MariánLayout of manufacturing workplace is demanding process which has to take into consideration the technical knowledge, ergonomic rules and factors. One of these factors is illumination, too. The optimization of working position illumination is significant element of working environment and it has strong effect on safety at the work, well-being, health, motivation and performance of workers. Presented article is focused on effect consideration of layout and operational layout of workplace to illumination of working position by software modelling in the stage of workplace design.Öğe Fractional Distillation & Characterization of Tire Derived Pyrolysis Oil(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2017-04-20) Mia, Makhan; Islam, Ariful; Rubel, Robiul Islam; Islam, Mohammad RofiqulEnergy is extracted recently from the waste products. Environmental pollution is being minimized along with the addition of considerable amount of energy beside the conventional sources. The energy extracted from the waste leads a hope of alternative fuel for internal combustion engines as well as to meet other requirement. Common energy conversion method uses tire, wood, rubber to derived energy through pyrolysis. About 9.25% gaseous, 43% liquid and 47% solid product are obtained for tire pyrolysis process at around 450 °C temperature. The liquid fuel is directly used in the engines and there phase is a mixture of complex hydrocarbon. In this work Fractional Distillation, oxidative desulfurization and de-colorization for upgrading liquid product has been conducted. In fractional distillation 30%, 20%, 6.35%, 6%, 4.5% and 1.3% by volume oils are obtained at over the temperature ranges- 121-180 oC, 211-260 oC, 71-120 oC, 191-210 oC, 181-190 oC and 40-70 oC. Then by desulfurization around 54-58 % sulfur was removed. For desulfurization hydrogen peroxide and formic acid (2:1 ratio) are used at constant temperature and magnetic stirring rate. The obtained fraction were characterized by elemental analyses, FT-IR techniques and compared with conventional diesel fuel. Sludge oil parts may be used as furnace oil which has higher calorific value than that of other conventional furnace oils. The rest of 40-70 oC and 71-120 oC oil parts may be used as alternative fuel like kerosene. Thus, the aim of the present study is to investigate the suitability of pyrolysis oil as an alternative fuel for IC engine.
