Neal Device - Check Valve Operating Frequency Apr 14, 2015 19:26:34 GMT -8
Post by Uncle Buddy on Apr 14, 2015 19:26:34 GMT -8
Thanks for joining in the conversation.
What you said puts me in mind of the pressure exchanger, especially the rotary pressure exchanger.
There are quite a few varieties of pressure exchanger. You would enjoy reading about them. There is a whole book about them if you live close to a university with a good technical library, if the book is not online.
Oddly enough, one type of rotary pressure exchanger is called an "equalizer" like Bob Neal's device. These devices were/are marketed as superchargers for big diesel engines by Brown Boveri, a big corporation in Europe, under the trade name Comprex. In fact, the Neal tube probably qualifies as a pressure exchanger, if it works the way I think it does (as an acoustically assisted thermal compressor aka pulsed injector).
Another type of pressure exchanger is the locomotive engine's smokestack-clearing device such as the Kyll-Chap exhaust (I can never remember how to spell that). Slugs of exhaust steam from the engine are send up the smokestack and if the smokestack is shaped a certain way, then this shape enables the fire to burn hotter by ejecting burnt gasses from the smokestack. Another patentee of a similar exhaust system is John Y Smith, who taught H K Porter the locomotive business. Smith's co-patentee was Herman Haupt. H K Porter sold air powered locomotives for decades, which were solar-enhanced devices and which brought about the conspiracy of silence when they became too popular. One reason for WW2 was to wipe these locomotives off the face of the earth, and they were proliferating at a high rate. All these early industrialists knew how to put low pressure air into a high pressure tank, but could barely allude to it, if at all, in written form, because they were linked at the hip with the early oil industry. They agreed that the world should become filthy rich off of oil, and while compressed air was necessary to the process, its real abilities were to be kept hush hush.
Basically a pressure exchanger consists of a higher pressure drive flow which mixes with a lower pressure induced flow to produce a single medium pressure flow. Early inventions along the lines of the rotary equalizer did not use acoustic processes to enhance performance, thus were not practical, but once it was learned that all pressure exchangers worked better with waves accounted for, it was accepted that pressure exchange is inherently an acoustical process. A big deal was made over a journal article written by someone named Dean which proved that no work is done by a steady flow process (don't ask me what that means exactly), this paper was referenced by many papers in the pressure exchange field.
My reason for focusing on Bob Neal when there are so many other more modern pressure exchangers which might work better is that I have fallen in love with the hunt. But there are in fact many ways to keep a car going when the power plant is solar energy stored in air and the car is traveling through its own energy medium.
Sirdoitall, your wording also reminded me of the siren, as Tommy mentioned.
J V Foa invented an interesting rotary pressure exchanger, looks like a spinning christmas tree light.
Here is a book on the "equalizer" and its obverse the "divider" which were manufactured by Brown Boveri:
Here is the book on pressure exchangers, with a list of libraries that own the book, so input your location to find the copy nearest you:
Here's an interesting link on pressure exchange, take a peek at the Bibliography for some of the names mentioned above:
Finally, the good old-fashioned jet pump aka injector, ejector, thermal compressor, etc. is considered a pressure exchanger but only if it is pulsed. To me, that is an acknowledgement from science that the device is inherently an acoustic device, such that if its drive fluid were not pulsed, then that would indicate a badly or casually designed device where efficiency is of no importance.