Bio Fuel Injection and Generated Voltage Change of Series Hybrid Electric Vehicle with Plant Oil Electric Generator

Ayumi Sudo,Yoshihiko Takahashi 제어로봇시스템학회 2016 제어로봇시스템학회 국제학술대회 논문집 Vol.2016 No.10

We are developing a range extended electric vehicle using a diesel engine electric generator with plant (vegetable) oil (named as bio EV). The vehicle design concept is a series hybrid electric vehicle. A diesel engine rotates a DC motor by using plant oil to generate electricity, and the developed vehicle runs by using the generated electricity. It is possible to run a long distance without refueling, and plant oil fuels are sustainable natural resources. Generally, a fuel mixture consisting of light oil and plant oil is used as bio fuel. However, in this study, we only used plant oil (SVO: straight vegetable oil or WVO: waste vegetable oil) as bio fuel in order to reduce fuel cost, and avoid using fossil fuel. As the viscosity of SVO or WVO is higher than that of general light oil, it is essential to examine the phenomena of fuel injection and generated voltage change. This paper reports the examination results of the bio fuel injection phenomena and the generated voltage change phenomena.

Mechanical Optimization of Series Hybrid Electric Vehicle with Plant Oil Electric generator

Yoshihiko Takahashi,Ryo Matsumoto,Hirotake Sasai 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10

We propose a new hybrid electric vehicle which uses natural energy, consumes little fuel, and operates over a long distance. We are designing a series hybrid system, in which a diesel engine operating on plant oil rotates an electric generator, and runs the vehicle using the generated electricity. The generated electricity may also be stored in batteries, which are also able to power the electric vehicle. The general intention of the proposed system is to reduce the use of non-renewable fossil fuels, and to reduce overall costs. Plant oil is ecological, and allows for the creation of a carbon neutral system in its production. Some forms of plant oils, such as non-esterified straight vegetable oil (NE-SVO) and waste vegetable oil (NE-WVO), are promising alternatives used in order to reduce fuel costs. In this paper, we will explain the concept of the proposed series hybrid electric vehicle system using plant oil, and will provide some experimental results of mechanical optimization in the electric generation system and the vehicle drive system. Considering fuel efficiency and the drive torque, optimum reduction ratios were obtained in the experimental results.

Electric power generation strategy based on model predictive control for conventional internal combustion engine vehicles

Seungwoo Hong,Inseok Park,Jeongwon Sohn,Yeongseop Park,Kangyoon Lee,Myoungho Sunwoo 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

With the increasing demand for fuel efficient vehicles, an electric power generation strategy is required in order to generate electric energy efficiently in conventional internal combustion engine (ICE) vehicles. The electric power generation strategy is available with a voltage controlled alternator, and it determines the amount of the generated electric energy. In this paper, the power generation strategy for ICE vehicles is proposed with the model predictive control (MPC) method in order to improve fuel efficiency of vehicles. The proposed MPC based approach is composed of two parts: prediction of battery states and optimization of the electric power generation. In the first part, the battery state of charge (SOC) is predicted with the powertrain model. Based on this predicted information, the optimal trajectory of the alternator command input is obtained by using the quadratic programming (QP) optimization method. The proposed algorithm is validated through simulation and compared with other conventional strategies used in commercial software. It is proven that the MPC based electric power generation strategy can improve the fuel efficiency.

차량 노면 진동을 이용한 공진형 선형 발전기 시스템의 강건최적설계

최지현(Ji Hyun Choi),김진호(Jin Ho Kim),박상신(Sang-Shin Park),서태원(TaeWon Seo) 한국생산제조학회 2014 한국생산제조학회지 Vol.23 No.4

To use vibration energy to generate electricity, a resonance vertical linear electric generator was applied to the suspension of a vehicle in a previous paper. However, the working conditions, including mass change in the vehicle body related to the cargo on board, number of passengers and the temperature difference caused by the operating environment, can influence the permanent magnet, which is the main component of the electric generator. Therefore, a robust optimum design is required to minimize the influences from the diverse operation conditions and maximize the electromotive force of the electric generator. In this paper, a resonance linear electric generator is introduced. Vibration response analysis to find the input velocity of the electric generator and an electromagnetic transient analysis to apply changes in the performance of the permanent magnet are performed. Finally, the optimum value of each design variable is derived using a Taguchi method.

전원구성비율 예측을 위한 System Dynamics 모형 개발

홍정석,곽상만,나기룡,박문희,최기련 한국시스템다이내믹스학회 2003 한국시스템다이내믹스 연구 Vol.4 No.1

How to maintain the optimal electric power generation mix is one of the important problems in electric power industry. The objective of this study is to develop a computer model which can be used to forecast the investment in power generation unit by the plant owners after restructuring of electric power industry. Restructuring of electric power industry will make difference in decision making process of investment in power generation unit. After Privatiazation of Power Industry, Gencos will think that profit is the most important factor among all others attracting the investment in the industry. Coal power generation is better than LNG CCGT in terms of profit. However, many studies show that LNG CCGT will be main electric power generation source because the rest factors other than profit in LNG CCGT are superior than Coal power generation. Because the rest of factors other than profit in LNG CCGT are superior than Coal power generation. The impacts of the various government policies can be analyzed using the computer model, thus the government can formulate effective policies for achieving the desired electric power generation mix.

세라믹 리니어엔진을 이용한 소형 전기자동차용 온보드 제너레이터 개발

김남열(Nam Yuer Kim),표영덕(Young Dug Pyo),임옥택(Ock Taeck Lim),김강출(Gang Chul Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4

In the realm of small electric vehicles (neighborhood electric vehicles or personal electric vehicles such as electric wheelchairs, electric scooters etc.), there's a power struggle brewing. They demand lots of electrical power and long operation, but current rechargeable battery cannot provide the operational durations required. Also short lifetimes of batteries impose a fundamental limitation. Due to these reasons, a small linear reciprocating engine and linear electric generator are designed in this paper. If an engine is used solely to produce electrical power, it is not necessary to convert the reciprocating linear motion of the piston to rotary motion by crank. Instead, a linear electrical generator may be coupled directly to the piston for a conversion of mechanical energy into electrical energy. Such a design has many advantages such as mechanical simplicity and low friction and it can make possible a small engine having high efficiency. In other words, linear engines give power output more efficiently compared to conventional reciprocating piston engine, because it doesn't have a crank mechanism, hence there is less mechanical loss. In this study, we developed a small sized linear engine for the electrical power generation. To increase the efficiency and endurance, we made a piston and cylinder sleeve by ceramic materials.

Electricity modulation of a water motion active transducer <i>via</i> surface functionality control

Yang, YoungJun,Park, Junwoo,Yoon, Sun Geun,Kim, Youn Sang unknown 2017 Nano energy Vol.40 No.-

<P><B>Abstract</B></P> <P>Recently, the water motion active transducer, an electricity generator which uses water contact variations, has attracted much attention as an eco-friendly energy harvesting device. In order to understand the electricity generation induced by ionic behavior in water at the solid-liquid interface of a water motion active transducer accurately and apply it to a wide range of applications, fundamental study of the surface functionalities at the solid-liquid interface of the water motion active transducer is essential. However, most studies in the field of water motion active transducer still remain them for a high power performance. Herein, through an investigation of surface functionality control at a solid-liquid interface, we modulate the generating electricity of a water motion active transducer and successfully demonstrate its potential toward the realization of a novel self-powered pH sensor. For both hydrophobicity and surface functionality control at the solid-liquid interface, we used a self-assembled monolayer technique with APTES ((3-aminopropyl) triethoxysilane) and POTS (1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane). Through control of the surface functionalities at the interface, we show substantial potential for the modulation of the generating electricity. In addition, the unique electric characteristics of this device offer a fundamental understanding of the origin of electricity generation at solid-liquid interfaces induced by water motion and provide a more accurate understanding of the ionic behaviors occurring at solid-liquid interfaces toward the novel ion-functional devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We investigated the water motion transducer performance according to surface functionality. </LI> <LI> The surface functionality of water motion transducer was modified with positive. </LI> <LI> Positive surface functionality was fabricated with APTES and POTS. </LI> <LI> Depending on the types of ions(cation/anion), the electrical signals were reversed. </LI> <LI> Water motion transducer with positive functionality was demonstrated as a novel self-powered pH sensor. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Performance Analysis and Mass Estimation of a Small-Sized Liquid Rocket Engine with Electric-Pump Cycle

이주연,노태성,허환일,이형진 한국항공우주학회 2021 International Journal of Aeronautical and Space Sc Vol.22 No.1

The propellant supply system of a liquid rocket engine using an electric pump has high reliability because of the relatively small number of components. The system also has the merit of a quick response and ease of control owing to its simple configuration. Recently, the rocket lab developed the Rutherford engine, which has an electric pump cycle, because of the improved technology in the electric motor and battery. This paper examined the development of the electric-pump cycle and compared the performance with other cycles for a small-sized low-thrust rocket engine. Performance analysis and mass estimation were conducted using the developed analysis program, in which reliability in mass estimation was improved based on the designed configuration or real performance data from commercial products. In addition, the modeling method and analysis procedure were described in detail. The results showed that it is possible to develop a small-sized engine with an electric-pump cycle when the present technologies are applied. The electric-pump cycle had a smaller dry mass than the gas-generator cycle, even at a low thrust level of 500 N, and showed higher performance in specific impulse and speed increments.

전력산업의 온실가스 배출요인 분석 및 감축 방안 연구

조용성 한국기후변화학회 2017 한국기후변화학회지 Vol.8 No.4

Electricity generation in Korea mainly depends on thermal power and nuclear power. Especially the coal power has led to the increase in CO2 emissions. This paper intends to analyze the current status of CO2 emissions from electricity generation in Korea during the period 1990∼2016, and apply the logarithmic mean Divisia index (LMDI) technique to find the nature of the factors influencing the changes in CO2 emissions. The main results as follows: first, CO2 emission from electricity generation has increased by 165.9 MtCO2 during the period of analysis. Coal products is the main fuel type for thermal power generation, which accounts about 73% CO2 emissions from electricity generation. Secondly, the increase of real GDP is the most important contributor to increase CO2 emissions from electricity generation. The carbon intensity and the electricity intensity also affected the increase in CO2 emission, but the energy intensity effect and the dependency of thermal power effect play the dominant role in decreasing CO2 emissions.

Electric Power System Simulation을 이용한 차량 충방전 연구

송준형(Junhyung Song),이호선(Hosun Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5

This Paper is for the vehicle charging balance simulation using Electric Power System Simulation in GM Korea Company. In order to reduce the cost and time for the vehicle development, the vehicle charging balance design is implemented using Electric Power System Simulation. The simulation system needs various models like a battery and a generator model, and is defined by the electric load schedule of all electric device, EPM system, powertrain, ambient temperature and driving schedule. The correlation of the charging balance between simulation test and real-vehicle test was varified by the output Current of battery and generator. The result of simulation was high correlation with the charging balance test of real-vehicle.