微型摆式能源动力系统的能效分析

发布时间：2018-04-13 16:31

本文选题：微型摆式内燃机 + 能效分析　；参考：《南京航空航天大学》2016年硕士论文

【摘要】：随着电子与机械设备的微型化与便携化发展,传统的化学电池的能量密度已不能满足这种高能量密度的需求。当前以染料燃烧为基础的微型能源动力系统为这一趋势提供了新的解决方案。但是在目前的微型内燃机系统研究中,燃机的低效运行是困扰研究者的一大难题。为提高微型摆式内燃机的输出特性,需要针对系统实际运行能效规律的分析。对微型摆式内燃机的工作过程进行数值模拟计算可以十分方便高效的得到微型内燃机的运行规律。本文根据内燃机的一般原理与规律研究微型摆式内燃机的工作过程。主要工作包含:1.建立包含不可逆损失条件的四冲程微型摆式内燃机的零维数学计算模型;2.利用MATLAB软件对微型摆式内燃机的工作过程进行数值建模和数值计算,得到内燃机稳定运行的循环参数,通过数值模拟数据分析微型摆式内燃机的能效表现情况,并探讨提高能效的影响因素;3.比较了系统负载、燃烧时间、泄漏、摩擦、传热等不可逆条件对于微型摆式内燃机系统的影响情况和对功效的影响趋势;4.探讨微型摆式内燃机能效提高的途径,指出各不可逆条件中制约微型摆式内燃机能效的主要因素。本文通过建立微型摆式内燃机的数学计算模型,模拟计算微型摆式内燃机运行过程参数,研究影响微型摆式内燃机的能效的各项不可逆条件,探究微型摆式内燃机不可逆损失显著增加的机理,并在此基础之上探讨提高微型摆式内燃机的途径。研究发现,在微型摆式内燃机系统中,各种不可逆条件之间存在互相作用。一种损失条件的增强同时会导致其他损失条件的变化。就目前各种不可逆条件的控制精度而言,泄漏条件在微型内燃机中的影响作用十分明显。同时,计算结果说明控制摆式内燃机的压缩比可以有效降低泄漏条件的敏感性。
[Abstract]:With the development of miniaturization and portability of electronic and mechanical equipment, the energy density of traditional chemical battery can not meet the demand of high energy density.The current micro energy power system based on dye combustion provides a new solution to this trend.However, in the current research of micro internal combustion engine system, the low-efficiency operation of gas turbine is a difficult problem for researchers.In order to improve the output characteristics of micro pendulum internal combustion engine, it is necessary to analyze the law of energy efficiency in actual operation of the system.Numerical simulation of the working process of micro pendulum internal combustion engine can obtain the running law of micro internal combustion engine conveniently and efficiently.According to the general principle and law of internal combustion engine, the working process of micro pendulum internal combustion engine is studied in this paper.The main work consists of 1: 1.The zero dimensional mathematical model of four stroke micro pendulum internal combustion engine with irreversible loss condition is established.The working process of micro pendulum internal combustion engine is modeled and numerically calculated by MATLAB software, and the cycle parameters of engine running stably are obtained. The performance of energy efficiency of micro pendulum internal combustion engine is analyzed by numerical simulation data.The influencing factors of improving energy efficiency are also discussed.The effects of system load, combustion time, leakage, friction, heat transfer and other irreversible conditions on micro pendulum internal combustion engine system are compared.This paper discusses the ways to improve the energy efficiency of micro pendulum internal combustion engines, and points out the main factors restricting the efficiency of micro pendulum internal combustion engines under various irreversible conditions.In this paper, the mathematical model of micro pendulum internal combustion engine is established, and the operating process parameters of micro pendulum internal combustion engine are simulated and calculated. The irreversibility conditions affecting the energy efficiency of micro pendulum internal combustion engine are studied.The mechanism of increasing irreversible loss of micro pendulum internal combustion engine is discussed, and the way to increase the loss of micro pendulum internal combustion engine is discussed.It is found that there is interaction between various irreversible conditions in the micro pendulum internal combustion engine system.The enhancement of one loss condition can also lead to changes in other loss conditions.As far as the control accuracy of various irreversible conditions is concerned, the effect of leakage conditions on micro internal combustion engines is very obvious.At the same time, the calculation results show that the compression ratio of pendulum internal combustion engine can effectively reduce the sensitivity of leakage conditions.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TK401

【参考文献】