摘要
由于液态空气的低温和压缩特性,其储存的能量包含冷能、膨胀能。能量的组成和数量与气化压力的大小有关。过去的全开环气动发动机仅仅利用了膨胀能,而忽略了冷能,这导致发动机效率低。液态空气驱动的半开半闭循环发动机,充分利用膨胀能和冷能来提高效率。开环和闭环的权重比是影响发动机效率的一个重要因素。
The energy stored in the liquid air is found to be composed of the cryogenic energy and the expansion en-ergy, due to its low temperature and compressibility （when gasified）. The composition and the quantity of energy are related to the gasification pressure. Pure open cycle engines have devoted much attention only to making use the expansion energy, while the cryogenic energy is usually engines. A half-closed and half-open cycle cryogenic energy and the expansion energy. disregarded engine is proposed The volume ratio is , which resuhs in a poor efficiency of the to improve employed the efficiency by making as an index that indicates use of both the the weight ratio of open cycle to closed cycle, which is a significant factor that influences the efficiency of the engine.
出处
《液压与气动》
北大核心
2015年第3期90-93,98,共5页
Chinese Hydraulics & Pneumatics
关键词
热能
零排放汽车
液态空气
低温
气动
heat engines, zero emission vehicles, liquid air, cryogenic, pneumatic
