Monopropellant Powered Free Piston Hydraulic Pump

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RVZ717 Guru Join Date: Oct 2008 Location: City of Roses. Posts: 2056 Good Answers: 101	Monopropellant Powered Free Piston Hydraulic Pump 07/28/2009 6:35 PM
	I was doing some brainstorming/research this afternoon. The efficiencies of our current hydraulic systems is quite appalling. I credit this loss of energy to many factors, but in my mind the largest is the complexity of our current pump technology, and all the moving parts involved. I ran across this research paper from Berkley, and found it to be quite interesting, and a good read. What kind of drawbacks or pitfalls would this new "radical" hydraulic power source find in it's development? I can't understand why such a elegantly simple technology hasn't been the "norm" all this time. Is this a concept worth spending time and money on? Your opinions? here's the link to the paper again: http://vehicle.me.berkeley.edu/~tmcgee/researchphoto/kazerooni_mcgee_raade_part1.pdf __________________ Don't believe everything you read on the Internet!
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RVZ717 Guru Join Date: Oct 2008 Location: City of Roses. Posts: 2056 Good Answers: 101	#1 Re: Monopropellant Powered Free Piston Hydraulic Pump 07/28/2009 6:51 PM
	The above links are to the draft... this is the link to the actual published paper. http://vehicle.me.berkeley.edu/~tmcgee/researchphoto/IMECE2003_42603.pdf or here http://vehicle.me.berkeley.edu/~tmcgee/researchphoto/TGMcGee_MastersReport.pdf __________________ Don't believe everything you read on the Internet!
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#2 In reply to #1 Re: Monopropellant Powered Free Piston Hydraulic Pump 07/28/2009 7:26 PM
	Wow! That's wild. And so logical.
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Troy36 Power-User Join Date: Mar 2007 Location: Wisconsin USA Posts: 305 Good Answers: 25	#3 In reply to #1 Re: Monopropellant Powered Free Piston Hydraulic Pump 07/28/2009 9:24 PM
	Interesting, Thanks for the link!!! __________________ Troy
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silvCrow Guru Join Date: May 2007 Location: Aloha or Posts: 659 Good Answers: 19	#4 Re: Monopropellant Powered Free Piston Hydraulic Pump 07/30/2009 1:34 PM
	What does it cost to run one of these new pumps versus an IC run one of the same volume and pressure capability? How much does the peroxide cost versus diesel or gasoline driven pumps This answer may be why you don't see them in use. MY thoughts on this are that this will not scale up well when large volumes of hydraulic fluid are needed at higher pressures.. It does seem ideal for small applications, especially where portability is needed. It sure would be nice to be proved wrong on this one. __________________ Closed biased minds are utterly impervious to any factual evidence which contradicts their beliefs
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RVZ717 Guru Join Date: Oct 2008 Location: City of Roses. Posts: 2056 Good Answers: 101	#5 In reply to #4 Re: Monopropellant Powered Free Piston Hydraulic Pump 07/30/2009 1:46 PM
	I have the same thoughts... It would be interesting to test this concept.. but using diesel fuel instead of the peroxide. I just really like the simplicity of the concept, It takes soooo many of the variables, and points of failure out of the system. I'd bet that If as much time and money were spent dialing in this type of system, as is spent on many other things (IC engine for example), It could be figured out, and might just be quite efficient and reliable. Unfortunately, its still in it's infancy, and without interest, it will never mature. Seems, quite possible to me. __________________ Don't believe everything you read on the Internet!
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chrisg288 Guru Join Date: Sep 2006 Location: Clive, Alberta, Canada Posts: 5916 Good Answers: 204	#6 Re: Monopropellant Powered Free Piston Hydraulic Pump 07/30/2009 1:58 PM
	I like this idea. Hydrogen Peroxide is considered dangerous, and I believe it is a controlled substance. At purity levels greater than 55%, it is somewhat explosive. I think this is the level used for rocket applications. What you can buy in the store is 3%. (97% purified water) The old rocket packs spray the peroxide across a silver screen to cause the reaction... from what I can remember. You are right, it is surprising that this idea has not come up before. and others in the same vein. Good Work.. 5stars. Chris also why not a propane powered steam engine? water to steam expands 400 volumes.
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chrisg288 (1); lyn (1); RVZ717 (2); silvCrow (1); Troy36 (1)

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