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    • CommentAuthorattique008
    • CommentTimeDec 25th 2011
     
    All respectable members of this forum... i'm newbie here. feeling like, i've a right place to take a start as well as discuss about the project which i wanna make as my undergraduate final year project. i've choosen Compressed Air Engine as project to build it. compressed air tank pressure which can be provided to us through our lab is average 5bar. i was confused about the type as well as size of engine considering cost. as it's my undergraduate level and i'm a student. i've to make it on my own expenses. i request to you that considering me a noob just give me tips as well as those reference links (websites,ebooks,books etc) which can be helpful for me in general. there is a bulk amount of data but experienced people have convergence to particular topics... i'm just studying and getting some data to have a initiation for this project. and i want to make clear here that my core purpose to do this project, is to learn about designing in general and to have a working model to present in my department...

    i'm dedicated and i'll present my whole work step by step here, which i'll do.

    seeking for your(everyone) affection.
    • CommentAuthordavid
    • CommentTimeDec 25th 2011
     
    Compressed air engines offer a number of design possibilities, construction is reasonable, and materials should be low cost.
    I would begin by picking a valve system.. It could be a pin and ball, a rotary valve, or the more complex slide valve on a steam engine.
    Then make some drawings, plan the timing, do the math to confirm pressures and forces. Finally build it and confirm your design works and your calculations were right and you have an excellent project.
    David
  1.  
    It should be nice to see some real engineering presented on the subject. All my engineering is "seat of the pants" or by picking a proven method that you already know works.

    Any Ideas on the configuration? Number of cylinders?
    • CommentAuthorattique008
    • CommentTimeDec 26th 2011
     
    @david
    Thanks a lot to give me an idea of initiation which consider better in your way...

    i grasped your idea...

    i want to ask further that as you said valve system will be first priority to you. it could be pin and ball, rotary or slide valve, if you're supposed to transform the existing simple 2 or 4 stroke petrol engine or diesel engine into a compressed air engine then what will you recommend?

    its all about initiation sir. i'm not gonna asking very deeply at this time... because as its believed that initiation is somewhat difficult as compared to proceeding. when i'll clear my concepts with the help of possibilities then i'm sure i'll be able to set a task and go on. and many thanks for your help sir.
    • CommentAuthordavid
    • CommentTimeDec 27th 2011
     
    If I wanted to convert a 2 or 4 cycle combustion engine to compressed air I would start by looking at the cycles of the combustion engines and the cycle needed for a compressed air engine. Sketch the cycles show how the gasses are moving and what’s happening. Then you should see how the existing valves and parts work together. Once you understand that you can decide what you would need to change to covert a combustion engine to compressed air.
    I never asked, where are you going to school and what degree are you working towards?
    David
    • CommentAuthorattique008
    • CommentTimeDec 29th 2011
     
    thanks for your attention sir. i'm enrolled B.Sc. Mechanical Engineering in University of Engineering and Technology, Taxila, Pakistan.
    • CommentAuthorattique008
    • CommentTimeDec 29th 2011
     
    Sir, i,ve studied about the cycles. In near future we'll study Internal Combustion Engines as subject too. But its all about my interest to do it in own way. I know i've to follow the principles. but as its my new experience to get in touch with all of these things thats why i was asking about it.