Author Options:

can i build a dual turbine which is powered by steam which is condensed and released like a water wheel. would it work? Answered

if I build a steam turbine powered by burning waste using a pelton turbine then the steam will travel upwards. if I condense and store it, then release it past another pelton turbine to restart the cycle then will it be equally efficient. assuming the fuel source is free can this be practical in terms of electricity generation?



9 years ago

Here is a less "self stroking cerebral" answer for you. Yes and no. You can condense the steam after use by using a copper coil such as used in a moonshine still- water will come out the other end. No- because the ability of that water to turn any turbine depends on the psi. In order to get any significant amount of pressure, you would have to expend energy to pressurize it or pump it to a container large enough to use the non-compressing characteristic of H2O (a.k.a. weight pressure) to push through the turbine- keeping in mind the diameter of the flow tube can also help with higher pressure. But all of this might make your Net energy go into negative. I did say this was going to be less cerebral didn't I?LOL Hope this simplifies it. You still have options though- hybridize to get free energy for you pump?????


10 years ago

The steam only goes upward when it is free in the atmosphere to interact with the cold air. The steam is less dense and rises. Steam that is unpressurized like that can't do much work. Normally there is a nozzle which accelerates the fluid, even with a Pelton wheel. The pressure behind the nozzle, and it's size and shape, is what determines the speed of the turbine. Normally with a steam turbine, the water will be in a pressure vessel of some sort that gets heated by the burning fuel. Then, under pressure from 30 psi up to thousands of psi, it doesn't really care if it gets squirted in any particular direction; it just goes in the direction of where the turbine nozzle is. With your open-burning waste situation, the upward draft of steam on a fire may be taken advantage of, but will be low pressure compared to containing the steam in a vessel. (which is very dangerous, by the way, and there are very stringent laws about the steam boiler types and procedures). It will be perhaps one or two psi pressure. The open waste-burning low-pressure steam turbine will need a larger surface area to get the power out...a giant pelton wheel might work ok. The idea of condensing and storing the steam... Condensed steam is commonly called water. Perhaps you mean compressed steam, in which case, how is it to be compressed? It is possible that the idea of stacked turbines can work in your open-burning situation, because the excess heat of the fire continues to rise and can re-heat the cooler output from a lower turbine for the hotter input of the next higher turbine. A closed, pressurized fluid turbine system is the only efficient way to go, however. Otherwise, envision a wind turbine type system, suspended above the fire and catching the updraft, as a possible alternative.