| english |
|
|
|
|
| Simulation of internal combustion engine fueled by natural gas/liquefiedpetroleum gasbiogas blends with Modelica |
| GUO Jia-sheng1, QIN Chao-kui1, GERHARD Schmitz2 |
1.College of Mechanical Engineering, Tongji University, Shanghai 201804, China;
2.Institute of ThermoFluid Dynamics, Technical University of HamburgHarburg, Hamburg 20179, Germany |
|
|
|
Abstract Since the physical and chemical characteristics of biogas, some problems such as slow combustion speed, uncompleted burned fuel and high exhaust temperature will occur in its applications in engine. The biogas engine model library was built with the objectoriented language Modelica, the performance of a fourstroke sparkignition gas engine operating with natural gas/liquefied petroleum gasbiogas blends were investigated. Natural gas (33%, 67% and 100%) and liquefied petroleum gas (5%, 10% and 15%) were added to the biogas and were simulated as the fuel of SI engine. The effects of natural gas/liquefied petroleum gasbiogas blends on the performance of sparkignition engine used for electricity production were numerical investigated, the results were validated through the experiments on a gasoline modified gas engine. The results suggest that: There is an improvement in brake thermal efficiency and brake powers with the addition of natural gas/liquefied petroleum gas in biogas. The feature of reusable and objectoriented of Modelica will enhance the modeling and simulation of biogas engine performance greatly not only in accuracy but simulation efficiency, this would be efficient for the design and the optimum work of the biogas fuelled engine．
|
|
Published: 28 February 2011
|
|
|
基于Modelica的生物质燃气内燃机性能模拟研究
针对由沼气成分及其理化特性导致的内燃机燃用沼气时会发生燃烧速度慢、后燃严重、排气温度高等问题，将生物质燃气内燃机作为研究对象,基于可重用性及面向对象的Modelica 语言建立内燃机模型库,将生物质燃气为燃料对四缸四冲程火花点火内燃机性能进行分析.通过仿真研究不同比例天然气(体积分数分别为33%,67%及100%)和LPG(体积分数分别为5%,10%及15%)对内燃机性能的影响,并在一台原汽油机改装的生物质燃气内燃机进行实验验证．结果表明：随着天然气/LPG的加入,内燃机的热效率及功率有所提高,且随着生物质燃气中天然气/LPG体积分数的增加,内燃机的热效率及功率也将相应增加,天然气/LPG的加入有利于内燃机燃烧；基于可重用性及面向对象的建模语言Modelica,不仅大大提高内燃机建模及仿真效率,也将有效改进内燃机的设计及参数优化．
关键词：
面向对象,
Modelica,
火花点火内燃机,
生物质燃气
|
|
| ［1］王久臣, 戴林,田宜水,等.中国生物质能产业发展现状及趋势分析［J］.农业工程学报，2007,23(9): 276-282．WANG Jiu-chen, DAI Lin, TIAN Yi-shui, et al. Analysis of the development status and trends of biomass energy industry in China ［J］. Transactions of the CSAE, 2007, 23(9): 276-282．［2］熊树生, 楚书华, 杨振中. 活塞式内燃机燃用沼气的研究［J］. 太阳能学报， 2003, 24(5): 688-692．XIONG Shu-sheng, CHU Shu-hua, YANG Zhen-zhong. Study on internal combustion engine running by biogas ［J］. Acta Energiae Solaris Sinica, 2003, 24(5): 688-692．［3］陈勇, 兰秀菊, 鲁建厦, 等.基于快速燃烧的火花点火式沼气内燃机性能试验研究［J］. 浙江工业大学学报， 2002, 30(5): 455-459．CHEN Yong, LAN Xiu-ju, LU Jian-sha, et al. Experimental research on the performance of ignited biogas engines with fast burning ［J］. Journal of Zhejiang University of Technology, 2002, 30(5): 455-459．［4］盘朝奉, 谢美芝, 韦超毅, 等. 小型汽油机燃用沼气性能优化措施试验研究［J］. 拖拉机与农用运输车， 2008, 35(6): 8082．PAN Chao-feng, XIE Mei-zhi, WEI Chao-yi, et al. Test on performance optimization of burning biogas for small gasoline engine ［J］. Tractor & Farm Transporter, 2008, 35(6): 81-82．［5］Modelica Association. Modelica and Modelica association ［EB/OL］. ［2009-11-15］. http://www.modelica.org/.［6］TILLER M M. Introduction to physical modeling with Modelica ［M］. Dordrecht: Kluwer Academic Publishers, 2001:10-16．［7］赵建军,丁建完,周凡利,等. Modelica 语言及其多领域统一建模与仿真机理［J］. 系统仿真学报, 2006, 18(2): 570-573．ZHAO Jian-jun, DING Jian-wan, ZHOU Fan-li, et al. Modelica and its mechanism of multi-domain unified modeling and simulation ［J］. Journal of System Simulation, 2006, 18(2): 570-573．［8］丁建完,周凡利,陈立平. Modelica 模型的相容初始化［J］. 系统仿真学报, 2009, 19(17):3930-3933．DING Jian-wan, ZHOU Fan-li, CHEN Li-ping. Consistent initialization of Modelica models ［J］. Journal of System Simulation, 2009, 19(17): 3930-3933．［9］杨世文, 苏铁熊, 李炯. 基于Modelica 语言的面向对象的内燃机建模与仿真［J］. 车用内燃机, 2004(2):39-42．YANG Shi-wen, SU Tie-xiong, LI Jiong. Object-oriented modeling and simulation of an engine with Modelica ［J］. Vehicle Engine, 2004(2):39-42．［10］И.И.Вибе. Новое о рабоцем циклЕ двигателей (скорость сгорания рабоций цикл двигателя). МоскваСвердловск:Москва, 1962:65-78．［11］STAS M., WAJAND J A. Bestimmung der vibeparameter fur den zweipbasigen brannverlauf in direkteinspritzdieselmoteren［J］. MTZ,1988,49:7-8．［12］WOSCHNI G. A universally applicable equation for the instantaneous heat transfer coefficient in the internal combustion engine［J］. SAE Paper, 670931． |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
