Laboratory-Scale And Real Experimental Study On The Performance Of Energy Regenerative Suspension System

Nowadays, getting more efficient vehicle to investigate the improvement in renewable energy is highly crucial for the automotive industry. The operation of most vehicles is with fossil fuel. However, there are some vehicles which apply varying energy resources. The previous EReSS using the magnetic coil does not show satisfying performance in term of the voltage output. Therefore, the goal of this research is to investigate the improvement of the energy regenerative suspension system (EReSS) to obtain energy efficient vehicle (EEV) from the vibration of vehicle suspension system. The study began with the observation of the potential vibrations created by a vehicle running on a route that has been selected. The designed system has been put to the test on a test rig for the laboratory scale experimentation procedure to monitor its reliability and harvesting potential. At the laboratory, the EReSS test produces the maximum output voltage of 32.76 V at 400 windings. Additionally, the test is carried out to test the function of the EReSS system on real vehicle. In the next step, the device is installed on a passenger vehicle with minor modification on the suspension system. The vehicle works on the same route to observe the electrical voltage harvested during ordinary driving on the actual traffic. The EReSS recorded that the maximum voltage at the real car test was 17.6 Vat 400 winding. The tests are done with the help of the Data Acquisition (DAQ) system to record the reading of voltage produced by the EReSS system. The material improvement can boost the output voltage. According to the obtained results, it is observed that, the proposed system can lead to minimal energy wastage because of the vibration and it produces an effective vehicle in terms of electrical and electronic utilization. To add, the output voltage of the EReSS can be affected by the number of windings of the coil and its diameter. The study shows that with higher number of coil winding, higher output voltage is achieved. There is evidence that the EReSS harvests energy therefore, it can be used on hybrid and electric vehicles to develop the vehicle, in terms of the efficiency and it will further reduce the fuel consumption

Experimental and modeling stress concentration factor (SCF) of a tension poly lactic acid (PLA) plate with two circular holes

The design of high performance aircraft structures frequently includes various shape and size discontinuities for various purposes. The zones near to these notches become critical regions under various working loading. The stress concentration factor (SCF) and tensile strength degradation of poly lactic acid (PLA) plates are addressed in the current study through a combination of experimental and numerical studies using finite element (FE) modeling techniques. The present work performs stress concentration factor (SCF) of rectangular plates with two symmetrical circular holes under uniaxial tension load of two various types (PLA, PLA/15%carbon), which were determined in the current work experimentally and numerically using finite element method with help of Ansys software. The results of experimental test showed decay in tensile modulus and tensile strength is less than that of using plates without holes by (10%, 22.1%) for (PLA, PLA/15%carbon) respectively, and the apparent stress concentration factor is (3.33, 3.61) respectively. And showed decay in tensile strength is less than that of using plates without holes by (28.35%, 27.77%) for (PLA, PLA/15%carbon) respectively, due to the concentration of stresses around the holes. A finite element analysis is carried out and the outcomes have been estimated with experimental results for checking the efficient use of this article. The numerical results show the Von Mises stress distribution and stress concentration factor is (2.16, 2.35) for (PLA, PLA/15%carbon) respectively

Analysis Of Engine Radiator Performance At Different Coolant Concentrations And Radiator Materials

Abstract: Functioning as a cooling system, a radiator is an essential component in reducing the temperature of an internal combustion engine (ICE) of a vehicle by absorbing the heat and dissipated it into the air. With good and effective radiator, the engine will perform at optimized condition. In this study, the performance of radiator was analyzed at different radiator materials and coolant concentrations. A spark ignition (SI) 1.5L engine radiator system was used at 20%, 30%, 40%, 50% and 60% ethylene glycol coolant concentrations. The simulation of heat transfer was performed on different fins material, aluminum, brass and copper using commercial available finite element analysis (FEA) software. Promising results showed that, copper fins was the best among the materials. It is also observed that the lower the coolant concentration, the better the performance of the radiator in reducing the ICE temperature

Predictive Maintenance Of Railway Transformer Oil Based On Periodic Content Analysis

The high frequency of operation of commuter trains, due to passenger demand as well as the selection of railway as the mode of daily transportation for commuting on weekdays, increases the usage of on-board power, especially for a train’s traction system. As maintenance is rarely performed on transformer oil, it deteriorates and negatively affects transformer performance, increases heat, and may damage the transformer as well. This will result in significantly costly maintenance expenses for train operators. Therefore, this paper proposes a predictive maintenance schedule for transformer oil. The recommendations are based upon an analysis of transformer oil contents and its properties over a 90-month period of operation. A linear correlation between the properties of the oil and the train’s period of operation yielded a predictive maintenance schedule, primarily reclamation and filtration, for the oil at the threshold of each property. Major oil changes are to be considered when all properties are approaching their thresholds. As oil deterioration increases over time, a specific maintenance schedule was suggested. This was tested and observed on several transformer units. The content analysis of each oil is also discussed. Based on the results, this predictive maintenance schedule can be used on other trains with the same transformer model or other trains using the same type of insulating oil