Abstract
Using compressed air as a vehicle propulsion is an appealing prospect. It would provide a longterm potential to reverse environmental impact associated with burning of fossil fuels, provided that clean energy (wind energy or solar energy) is used to produce the compressed air. This paper presents a systematic study on the requirement of the design parameters of a prototype compressed air engine for optimising its efficiency and performance. An air engine system model has been developed and a detailed numerical simulation is carried out to investigate the effect of a number of key design parameters including the dimensions of the intake system, compression ratio, bore and stroke, crank/conrod (connecting rod) ratio. It has been found that the air engine efficiency and performance are sensitive to these parameters, and optimisation of them is a necessary requirement during the compressed air engine design process.
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