Instead of mixing fuel with air and burning it in the engine to drive pistons with hot expanding gases.
Compressed air engine efficiency.
Mono energy mode 1 available on all mdi vehicles the pre compressed air in the tanks is transferred to a chamber called active which provides work before being expanded in the cylinders to perform.
An efficiency of 34 is achievable for a compressed air system but for simple model engines this is likely to be less than this and i would suggest 12 5 as a starting number is reasonable and aligns with the first reference that i found.
1 1 compressed air engine basics.
The 4 cylinder compressed air engine.
A pneumatic motor or compressed air engine uses the expansion of compressed air to drive the pistons of an engine turn the axle or to drive a turbine.
The following methods can increase efficiency.
Proposed a newly electro pneumatic valve for the compressed air powered engine 11.
Mdi has already applied its cat compressed air technology engine in a prototype city car.
Designed an exchange system for the air powered engine 10.
The vehicle s accelerator operates a valve on its tank that allows air to be released into a pipe and then into the engine where the pressure of the air s expansion will push against the pistons and turn the crankshaft.
A continuous expansion turbine at high efficiency.
A pneumatic motor air motor or compressed air engine is a type of motor which does mechanical work by expanding compressed air pneumatic motors generally convert the compressed air energy to mechanical work through either linear or rotary motion.
Linear motion can come from either a diaphragm or piston actuator while rotary motion is supplied by either a vane type air motor piston air.
A compressed air engine is a pneumatic actuator that creates useful work by expanding compressed air.
Tata motors india s largest automobile company has signed an agreement with mdi moteur developpment international of france for the application in india of mdi s compressed air engines.
If operating conditions of the brayton cycle engine in example 13 12 are altered such that the isentropic temperature at the exit of the compressor is t 4s 35 0 c when the inlet air temperature is 22 0 c determine the brayton cycle cold asc thermal efficiency of this engine under these operating conditions.
Air cars using this engine will have tanks that will probably hold about 3 200 cubic feet 90 6 kiloliters of compressed air.
References compressed air system efficiency wulfinghoff energy services inc.
Use of waste heat notably in a hybrid heat engine design.
A compressed air vehicle is powered by an air engine using compressed air which is stored in a tank.
High efficiency compressed air engine reversible as compressor modes of operation air only air external combustion.
A few quick facts on air compressors and energy.
According to the above analysis the compressed air engine cae will be emphasized in future.
Of the lifetime cost of an air compressor 76 is electricity.
