Recent content by Steven Bolgiano

Oh! And just to push the solar heating as the best medium ...... calculate (A) the energy created by your electric heater, THEN calculate (B) the energy value of the methane that the little tank creates, ... and subtract A from B and hope for a positive number!

Hi Lnewqban, If someone recreates your digester model illustration, my suggestions are: 1) Suspend your heater a little higher. The sludge especially with a vertical geometry (my preference is horizontal tanks) .... will gather quickly at the bottom covering up your heater. Also to choose the...

YES. When I was in Shenzhen working with the guys from the Puxin company (a GREAT supply resource especially for smaller "home scale" digesters) , they used a technique similar to yours, but kind of reversed from your illustration.... they have an inverted fixed dome in a cylinder of water, and...

Dale: Two references to "Pumps" One type is used to transfer gas to larger storage bladders The other reference to a pump Is the "Terraforming" Village project in Ghana I'm designing, where a methane powered well pump is used to deliver water to crops.

Dale: You nailed the main point, ... Methane requires an on-site system, and primarily because the methane costs almost more energy to compress than its energy value. There is kind of an "inverse" present for agricultural biodigestion. A poultry farm or dairy farm's energy value of it's manure...

Dale: Apologies. Typical with old farts, I totally ran past your question. The methane here will heat the greenhouse you see in the second video. The methane in Ghana will run a well pump.

Dullard: The question is then, do you still have your eyebrows?! I first started studying hydrogen generation using electrolysis .... And I too entertained myself. However when I went to my mentors to understand how I could increase the scale of the systems I was building. They unscientifically...

Hi Dale! I'm 74. The last system I built was 800 cubic meters, using chicken manure, and based on multiple travel to work with systems in Wales and China. The problem we encountered is AD needs heat to operate, and the parasitic load of using the methane for the heat, limits efficiency...

I guess the concern is the smaller bag has a breaking point that's less than the bigger bag, ... but if I don't fill the bigger bag to the point that it is physically stretching and creating a "back pressure" on the smaller bag, how does that affect the pressure on the smaller bag? If I keep the...

Hi Physics Forum Folks! What an amazing resource of knowledge, ... thanks! The question is on the attached graphic, as its much more clear with an illustration. (Please read questions on this graphics first before looking at the video below,) This video is a very quick look at the actual...

Ah! So while the pump may need very little force to circulate water in the circuit ..... I see what you mean, ... without a pump, a thermal siphon generating heat transference on the downward link of the circuit is difficult to envision..... How could that happen?

Thanks so much! I guess a better way to ask my question is: In a closed loop system, what information or monitoring tells you a thermal siphon is active or in active?

Ha ha! Isn't that the truth. thanks again.

Nice! OK .... so how does one measure the thermal siphon's transfer of heat through a system? Is it by monitoring the temperature from different locations, calculating the difference (Delta?) and maybe the rate of change? (And) ..... I've got a low gpm sump pump .... does that have to be...

Great info. Can you send a description or diagram of one?