排序方式: 共有25条查询结果,搜索用时 15 毫秒
1.
压缩空气动力汽车的可行性分析 总被引:1,自引:0,他引:1
介绍了压缩空气动力汽车的工作原理,研究了空气动力发动机工作过程的能量利用,对高压空气的储存压力进行选取,并分析了环境温度、行驶速度、汽车总质量等因素对空气动力汽车续驶里程的影响,探讨了空气动力汽车的补充能源来源、经济性、安全性、结构布置等问题,认为压缩空气动力汽车在技术上是可行的,是一种具有应用前景的绿色汽车。 相似文献
2.
3.
4.
5.
6.
压气作业在地铁盾构施工中的应用 总被引:4,自引:0,他引:4
结合广州地铁盾构施工实例,介绍了压气作业的原理及地质条件,简述了人闸的维护及安全装置等,探讨了压气作业在不稳定地层中更换刀具的情况,并阐述了压气作业中的常见问题及处理方法。 相似文献
7.
The effect of extinguishing agents on the composition of smoke from wood fires of different intensities was studied. Three
agents were examined: water, a protein-based water additive, and a sulfonate detergent-based compressed air foam (CAF). Air
samples were analyzed for volatile organic compounds (USEPA 502 list), aldehydes, polyaromatic hydrocarbons, acid gasses,
CO, CO2, SO
x
, and total volatile hydrocarbons. Air concentrations of levoglucosan and methoxyphenols, which are specific products from
burning cellulose and lignin, respectively, were also measured. Levoglucosan, methoxyphenols, and many of the polyaromatic
compounds have not been previously reported in overhaul smoke. A solitary test with water extinguishment was repeated for
an assessment of variability. HCN and acid gases were not present in significant concentrations. The principal components
that contributed appreciably to short-term occupational exposure hazards were formaldehyde, acrolein, benzene, polyaromatic
hydrocarbons, and carbon monoxide. When a flocculation effect that cleared air particulate occurred during the use of the
protein-based water additive, air concentrations of most chemicals in the air samples were reduced. 相似文献
8.
对一种带压缩空气储能的冷热电联产系统进行了热力学(火用)分析,得到了各主要部件和整个系统的(火用)损失及(火用)效率的变化规律.分析结果表明空气透平绝热效率的提高对系统(火用)效率的贡献大于压缩机效率同样提高的功效;在其它参数确定时,存在最佳压比,可使系统的(火用)效率在该条件下达极值;高温换热器是新型冷热电联产系统中产生(火用)损失的主要部件,而循环水量的大小是影响高温换热器(火用)效率的主要因素. 相似文献
9.
10.
H. V. HEMPLEMAN R. I. McCALLUM A. EVANS F. M. JARDINE 《Water and Environment Journal》1990,4(4):386-390
For more than 50 years, civil engineers, scientists and the medical profession have collaborated to reduce the occupational health risks of working in compressed air. Under the auspices of the Medical Research Council, the Health and Safety Executive and, through the Construction Industry Research and Information Association (CIRIA) of the civil-engineering industry, the data of the Decompression Sickness Central Registry of exposure and medical records are being analysed in order to identify healthier working practices and disciplines. 相似文献