权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Study on Power System Using High Pressure Air Generator for Saving Energy

电力系统采用高压空气发生器节能研究

基本信息

批准号：
09555073
负责人：
IKEGAMI Makoto
金额：
$ 8.83万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555073/
关键词：
Engine Compressor Diesel Engine Energy Recovery Expander Exergy 過給

项目摘要

A hybrid power system using high-pressure air as working fluid has been proposed and its pefformance and efficiency were studied. This system is mainly composed of a diesel compressor, a high-pressure air tank and an air expander. The diesel compressor generates high-pressure air by compression using energy supplied by combustion in the same cylinder. The Air is transferred into the air tank, stored there and is delivered to the expander to obtain the power output according to the power demand. This system is supposed to have some advantages, that is, reduction in transmission loss using variable output air expander, improvement in engine thermal efficiency due to the limitation of its speed and output and energy saving due to brake energy recovery.The results of energy and exergy analysis show that the ideal cycle of this system has the same thermal efficiency as Brayton cycle and that some parameters such as pressure ratio and cut-off ratio should be optimized for increasing exergy efficiency when various power output is required.The prototype of the air expander was designed and constructed. The test results show that the output power could not be fully controlled over the wide range. The modification of valve shape proved to be effective to extend the controllable output range. In addition the increase in exhaust port time area will give better thermal efficiency and broader power range.

提出了一种以高压空气为工质的混合动力系统，并对其性能和效率进行了研究。该系统主要由柴油压缩机、高压储气罐和空气膨胀机组成。柴油压缩机通过使用由同一气缸中的燃烧提供的能量进行压缩来产生高压空气。空气被转移到空气罐中，储存在那里，并被输送到膨胀机，以根据功率需求获得功率输出。该系统被认为具有一些优点，即，使用可变输出空气膨胀机来减少传输损耗，能量和（火用）分析结果表明，该系统的理想循环具有与布雷顿循环相同的热效率，压比和切比等参数对该系统的性能影响不大，但对发动机的性能影响不大。当需要不同的功率输出时，应优化关闭比以提高（火用）效率。设计并建造了空气膨胀机样机。测试结果表明，输出功率不能在宽范围内完全控制。通过对阀形的改进，有效地扩大了可控输出范围。此外，排气口时间面积的增加将提供更好的热效率和更宽的功率范围。