论文标题:气动汽车动力系统能效分析
Exergy Research on Power System of Air Powered Vehicle
论文作者
论文导师 陈鹰；陶国良,论文学位 硕士,论文专业 机械电子工程
论文单位 浙江大学,点击次数 180,论文页数 74页File Size3611K
2006-01-01论文网 http://www.lw23.com/lunwen_234206907/
Air powered vehicle;Power system;Exergy analysis;Pressure reduction with throttling; Pressure reduction with expander;High pressure pneumatic system
压缩空气动力汽车利用高压压缩空气动力，将压缩空气存储的压力能转化为机械能驱动汽车运行，不消耗燃料，尾气无任何污染物资排放。同时压缩空气可以利用水力、风力、太阳能等可再生绿色能源作为动力的电力储备，用于汽车动力可使汽车真正成为零排放的环保汽车，解决石油矿物资源和环境污染问题，具有零排放，绿色环保的特点。因此，气动汽车是完全环境友好的绿色车辆，社会意义非常明显。本文采用有效能分析方法，建立了气动汽车动力系统的能量模型，分析了系统的能效特性，得到了一系列分析结果，并结合实验对模型的正确性进行了验证，对于气动汽车动力系统的研究和优化设计具有一定的指导价值。 论文的主要研究内容如下： 第一章综述了气动汽车动力系统相关技术及气动汽车的研究现状、发展趋势，阐述了对气动汽车动力系统进行能效分析研究的意义，提出了本论文所要进行的主要研究工作。 第二章论述了气动汽车动力系统组成，研究了气动发动机工作原理及高压空气在气动发动机中能量释放的特点，研究表明改善发动机在缸内气体膨胀做功过程的热交换条件，使其尽量进行等温过程，是提高工作效率的重要途径。 第三章应用有效能分析方法对气动汽车动力系统进行了研究分析，建立了相应的数学模型，在此基础上对气动汽车工作过程进行了仿真分析，得到了气动汽车动力系统各环节有效能消耗情况。 第四章对气源压力、发动机进气压力、转速、环境温度等对气动汽车动力系统能效的影响进行了分析，得到了系统能效随以上参数变化的规律；分析了节流减压和容积减压对动力系统效率的影响。 第五章建立了气动汽车动力系统实验台架，完成了气动汽车动力系统的台架实验及节流减压能量损失实验。 第六章对全文的内容进行了总结并对后续研究工作进行了展望。
Without using any mineral fuel, the air-powered vehicle(APV), which outputs the mechanical energy transformed from the compressed air energy into the torque form, is obviously important to society. The containers are filled in the recharge station, where fresh air is compressed to high pressure by an electric air compressor. In this way, APV exhausts only pure air and turns to be a completely zero-pollution vehicle.This thesis analyzes the exergy consumption of APV"s power system.Guided by exergy theory,the mathamatic model of APV"s power system is established ,and the working principles of the power system are given,then test bench for the power system is built and the results proves the correctness of the mathematical model. All these provide the optimization and further research of the power system with theoretical base, which will be both theoretically and practically important in the further research work.The whole thesis consists of the following chapters:Chapter 1 briefly states the rearch state of high pressure pneumatic system and APV,and explains the significance of exergy analysis on APV"s power system,finally summaries the main rearch objects of this thesis.In chapter 2,the consist of APV"s power system is discussed,the working principles of APE and the energy emission features of the compressed air are analyzed with the claim that, the essential way to improve the efficiency is to improve the exchange conditions for expansion process in the cylinders.In Chapter 3, the mathamatic model of APV"s power system is established with the applying the exergy theory.Base on the model,the simulation of the power system is carried on. The rearch shows the distribution of exergy in power system and claims that about 30 percent of total exergy is lost in pressure reduction with throttling,which indicates that pressure reduction with throttling is not very suitable for high pressure pneumatic system such as APV.In Chapter 4 ,the working characteristics of the exergy distribution in the power system, the influences on the distribution brought by the parameters as presure of pneumatic source,inlet air pressure,stroke-bore ratio of the cylinder,and the temperature of environment are comprehensively analyzed.The difference of two pressure reductions(pressure reduction with expander and pressure reduction with throttling) is disscussed.In Chaper 5,the test bench for APV power system is built up.The experimental researches on the APV power system and the exergy loss in throttling depressurization are accomplished.In Chaper 6,the research work is summarized and the perspectives on the future are presented.
|
