Posted by Curbie on October 2, 2009, 7:19 am
The answer is not killing me, just curious in case I ever take another
whack at solar thermal I think I might play around with the FuildDyne
and or Solar Bowl concepts (found the math recently for solar bowls).
If you could recommend a contact from their contact list I'd shoot
then an e-email to see if they want talk about it with me, or if you
think about it for your next e-mail to them, your call.
Posted by wapata.31 on March 12, 2015, 11:41 am
Le jeudi 1 octobre 2009 05:25:29 UTC+2, Morris Dovey a écrit :
6 years latter, your website change a little, but i'm here to discuss about
this project in particular.
As your approach is to get the most simple version, I think that this proje
ct is better than your earlier one's. But I don't understand your conclusio
Do you still think that it's a good project, or only an educational tool ?
How do you find the different sizes of volumes for the water and the air ?
If we want to put several pump in parallel, where will you do the junction
I hope that your always here to discuss about it !
Posted by Morris Dovey on March 12, 2015, 3:02 pm
On 3/12/15 6:41 AM, email@example.com wrote:
At low temperature, low pressure, and no load the engine runs.
As load is increased (starting with the energy required to open/close
one-way valves for pumping), more and more energy is consumed within the
engine to compress/decompress the air – and this is very unsatisfactory.
I think it’s a good educational tool - it helped me. :-)
I wrote software to emulate Stirling cycle engine behaviors, and
customize for test conditions using variable parameters (very often
guesses or estimates) and then try to construct a matching real engine.
Anywhere before the intake one-way valve (and/or) anywhere after the
output check valve.
Thank you – but I think you will find better (much more efficient)
solutions by moving your inquiry to high temperature, high pressure engines.
If you do that, and if you can use that engine to produce electricity,
then the pumping problem is solved by using existing-technology electric
pumps of the type and capacity that best meets the need. :-)
I do not discuss the high temperature / high pressure engines because of
the risk for immature experimenters. If/when I produce a reliable
design, I’ll make it available for everyone on my web site, just as I
did with the solar heating panel project.
Posted by wapata.31 on March 12, 2015, 5:41 pm
Yeah I see that. We have to be patient and not waiting for pressure.
But as the energy may be free, is it a real problem ?
5 meters with only one pump seem to be impressive !
I've seen an other solution a cascade (here: https://greenpeacechallenge.jo
voto.com/ideas/31433 ) but there is no information about a real prototype.
So I hope you're okay to share some information with me ! See at the end.
If I submit you an idea, with information like diameters, and height of pum
ping, will you help me for the length of tube for the "motorization" ?
... If have others questions. Because this pump is nearly safe, and cheap t
o try and still have an interest, like pumping in a hole to a reservoir (mi
ni water tower) for gardening. We don't need pressure in a garden.
In the upside of the system... The strait non-U one or the U one. Can you t
ell me why we heat the water ?? Why not only the air ? With a clay brick, w
ith a through hole, don't we have a system who keep the warm, permitting th
e air to heat and expense, push the water and... Fail, that create the rapi
d movement of the water, who touch and cool down the inside of the clay. Cl
ay who re-heat because it still hot ?
The low-differences-temperature-engine-projects seem to be magic, and so it
's not that easy to redesign them. It's hard to remove parts. But you did i
t, that why I'll really appreciate your help.
ps: I may see the electric power generator in the future, I'm an electricia
n. And I have a mini Stirling motor that make me dream ! But well, we'll se
e that in an other topic.
And I think that we have more to do in wasting less energies, than in produ
ce more energies. We loose heat everywhere, in every systems.
Posted by Morris Dovey on March 12, 2015, 10:50 pm
On 3/12/15 12:41 PM, firstname.lastname@example.org wrote:
It is a real problem. Making the engine was not particularly difficult,
but putting it to work but putting that engine to work in an actual
pumping system required solving some hardware problems beyond what could
be done with the resources available to me (and to the farmers in the
developing areas I’m interested in helping).
I’ve a;ready shared “some information“, but I’ll wait and see “at the
Hmm – I’ve already given more than a thousand times as much time and
effort (and money) as I can afford. I’ve put everything you need to work
this out for yourself at
There’s even an outline for a software model on that page, to give you a
I’m not very interested in small gardens. I’m very much more interested
in expanding the arable margins of the Nile for farms, an African
greenbelt, flood control systems in Southeast Asia, filling reservoirs
I try to help. I worked hard to make it easier for other people to learn
those things I found difficult – but I’m not willing to subtract time
from a project that appears to hold a great deal of promise to give to a
project/method that I already know does not work well enough to be worth
my time. I’m only one person and my time is limited. I hope you will
Yes, much of the work that goes into designing engines is related to
minimizing energy losses - especially thermal losses.