A method for reducing exhaust pressure of vehicle compressed air powered engine
Compressed air powered engine is a type of zero-pollution engine, but its conversion efficiency is very low for its high pressure exhaust which causes much exergy loss. In this study, a control system was developed to reduce the exhaust pressure of vehicle compressed air powered engine. The control system is made up of a controller, a pressure sensor, a photoelectric encoder, an inlet solenoid valve, and an exhaust solenoid valve. The controller receives the pressure signal of compressed air in cylinder from the pressure sensor and receives crank angle signal from photoelectric encoder, calculates when the solenoid valves should be opened or closed, and passes control signals to the solenoid valves. The simulation results indicate that the exhaust pressure can be controlled to be near to surrounding pressure by using this control system, and the exergy loss in exhaust stage can be avoided.
An Experimental Study on I . C . Engine Using Compressed Air as Alternate of Fuel : A Review
Nowadays the global warming is a prime problem for world and automobile industries is increases day by day. Automobile vehicle is main factor to produce many harmful gases like carbon monoxide (CO) hydro carbon (HC) also produce nitrogen oxide (NOx) so in this review some experimental analysis is show that the vehicle which is run on compressed air as alternate of fuel is not produce any type of pollution. Also study about the load calculation at particular pressure in the storage tank and vehicle is run or not compressed air. Some experimental study says about in this review that the some major change is required in I.C.Engine to run on compressed air. A single cylinder light weight four stroke engine is produced more power without any pollution is shown in the review. Compressed air technology to produce power is reducing many crises to change the world. Last few years many researcher works on compressed air engine and last 10 years (2005-2015) researchers review is shown in this paper.
High Efficiency Energy Conversion Systems for Liquid Nitrogen Automobiles
This investigation of the use of cryogens as energy storage media for zero emission vehicles has found that using liquid nitrogen to liquefy the working fluids of one or more closed Rankine power cycles can be an effective means for increasing motive power. System configurations are presented which can realize a specific energy greater than 400 kJ/kg-LN2 (110 W-hr/kg-LN2) without relying on isothermal expanders. A zero emission vehicle utilizing such a propulsion system would have an energy storage reservoir that can be refilled in a matter of minutes and a range comparable to that of a conventional automobile.