Small Engines as Bottoming Cycle Steam Expanders for Internal Combustion Engines

IF 1.5 Q3 ENGINEERING, CHEMICAL
Rohitha Weerasinghe, Sandra Hounsham
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引用次数: 2

Abstract

Heat recovery bottoming cycles for internal combustion engines have opened new avenues for research into small steam expanders [1]. Dependable data for small steam expanders will allow us to predict on their suitability as bottoming cycle engines and the fuel economy achieved by using them as bottoming cycles. Wankel Engines, with its lower resistance properties at small scale provide excellent contenders for bottoming cycle expanders. Present paper is based on results of experiments carried out on small scale Wankel and two stroke reciprocating engines as air expanders and as steam expanders. A test facility developed at Sussex used for measurements comprised of a torque, power and speed measurements, electronic actuation of valves, synchronized data acquisition of pressure and temperatures of steam and inside the engines for steam and internal combustion cycles. Results are presented for four engine modes, viz. reciprocating engine in uniflow steam expansion mode and air expansion mode, and rotary Wankel engine in steam expansion mode and air expansion mode. The air tests will provide base data for friction and motoring effects whereas steam tests will tell how effective will the engines be in this mode. Results for power, torque, and p-V diagrams are compared to determine the change in performance from air expansion mode to steam expansion mode.
作为内燃机底循环蒸汽膨胀器的小型发动机
内燃机热回收底循环为小型蒸汽膨胀器的研究开辟了新的途径[1]。小型蒸汽膨胀机的可靠数据将使我们能够预测它们作为底循环发动机的适用性以及使用它们作为底循环所实现的燃油经济性。万克尔发动机,以其较低的阻力性能,在小规模提供了极好的竞争者底部循环扩张。本文是基于小型万克尔和二冲程往复式发动机作为空气膨胀机和蒸汽膨胀机的实验结果。在苏塞克斯开发的一个测试设备,用于测量包括扭矩,功率和速度测量,阀门的电子驱动,同步数据采集蒸汽和蒸汽和内燃机内部的压力和温度和内部燃烧循环。给出了四种发动机模式的结果,即往复发动机在单流蒸汽膨胀模式和空气膨胀模式下,旋转万克尔发动机在蒸汽膨胀模式和空气膨胀模式下。空气试验将提供摩擦和驱动效果的基础数据,而蒸汽试验将告诉发动机在这种模式下的效率。对功率、扭矩和p-V图的结果进行比较,以确定从空气膨胀模式到蒸汽膨胀模式的性能变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Combustion
Journal of Combustion ENGINEERING, CHEMICAL-
CiteScore
2.00
自引率
28.60%
发文量
8
审稿时长
20 weeks
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