I agree it is a very interesting challenge and it seems there should be more applications for these machines, considering possible advantages of the SE. People should find or invent and make those applications where the SE is the winner.
I don't know why your comments aren't shown, or have been flagged as spam. The latest (above) is only partially shown, above, but was complete in my inbox. The thermal efficiency given for the IC engine seems a few points high, and would only apply at full throttle operation. But if your point is to say current IC engines are amazing machines, I agree. Can stirlings become such? As coolers they already are, but as engines, who knows. That makes them an interesting challenge. AR
Scaling by volume, using the 95 Watts from 5 cc, a 2 liter stirling engine (SE) would produce 38 kW = 51 HP. An automotive 2 liter IC gas engine could produce 170 HP, this makes the stirling 1/3 the power density of IC. It's also likely the 170 HP IC engine would be 30% efficient when running at 51 HP.
Maybe you could beat that efficiency with a stirling engine, but the IC could probably be tuned for improvement. So efficiency might be comparable between them. How about durability? The IC engine at part load would be more durable compared to a SE @ max load.
To get the most power and efficiency from the SE you need to maximize temperature and pressure and expensive materials are needed. Flame temperature for both engines might be 4000F, but the IC engine must only sustain it briefly during the cycle. Although the exhaust gas temperature might be 1700F continuously in the IC engine exhaust manifold, it is not a pressurized component! How durable can the extremely pressurized heat exchangers be, and what are the consequences of failures?
At atmospheric pressure, this engine makes about 9 watts of mechanical power. A regenerator would improve that, and, of course, pressurization is necessary for significantly more power. Consider E.F. Clapham's contest winning 5 cc stirling at the 1977 Model Engineer Exhibition in London; It made 39.4 watts @ 900 rpm, charged with air at ~1000psi. Later,with helium at 1200 psi,it produced 95 watts at 2000rpm. The second place engine produced ~5 watts with air at atmospheric pressure. AR
Very good presentation of your engine! this rotation of its engine is fantastic! especially the engine compression! Congratulations! I really enjoyed. How many rpm your engine has reached and how many watts of electricity it is capable of producing? And how many "cc" is your engine? Thanks in advance.
Hello dood great engine .i am in a need of a Stirling engine {great if two cylinder(please tell a simple one)} that can produce 20W to 100W .I need it for a solar project .
@anupamvipul233 IF you had hot side 650C hot and cool side 40C cold (very good active cooling system), and the engine would be with air and atmospheric pressure, you would get 100W at approximately 2 liters volume of the engine! That is HUGE and heavy engine! For 20W you need just 200 ccm. BTW 650 is very hot and 40 is very cold. I would be very surprised, if you reached these temperatures. So the conclusion - you can make stirling which makes just few watts easily. If you need higher power, you
@anupamvipul233 ... need big and heavy or high pressure hydrogen or helium filled stirling. There is no easy way how to get interesting power from stirling.
@Stepanfo1 It is too early to tell. All stirling engines I have seen do not implement the ideal stirling cycle except one which is only on paper and only one part is finished.
I agree it is a very interesting challenge and it seems there should be more applications for these machines, considering possible advantages of the SE. People should find or invent and make those applications where the SE is the winner.
skrame01 3 weeks ago
How about a comparison between an Internal Combustion (IC) and Stirling Engine (SE) of the same displacement: Here goes:
skrame01 3 weeks ago
@skrame01
I don't know why your comments aren't shown, or have been flagged as spam. The latest (above) is only partially shown, above, but was complete in my inbox. The thermal efficiency given for the IC engine seems a few points high, and would only apply at full throttle operation. But if your point is to say current IC engines are amazing machines, I agree. Can stirlings become such? As coolers they already are, but as engines, who knows. That makes them an interesting challenge. AR
aross345 3 weeks ago
This has been flagged as spam show
Scaling by volume, using the 95 Watts from 5 cc, a 2 liter stirling engine (SE) would produce 38 kW = 51 HP. An automotive 2 liter IC gas engine could produce 170 HP, this makes the stirling 1/3 the power density of IC. It's also likely the 170 HP IC engine would be 30% efficient when running at 51 HP.
skrame01 3 weeks ago
This has been flagged as spam show
Maybe you could beat that efficiency with a stirling engine, but the IC could probably be tuned for improvement. So efficiency might be comparable between them. How about durability? The IC engine at part load would be more durable compared to a SE @ max load.
skrame01 3 weeks ago
This has been flagged as spam show
To get the most power and efficiency from the SE you need to maximize temperature and pressure and expensive materials are needed. Flame temperature for both engines might be 4000F, but the IC engine must only sustain it briefly during the cycle. Although the exhaust gas temperature might be 1700F continuously in the IC engine exhaust manifold, it is not a pressurized component! How durable can the extremely pressurized heat exchangers be, and what are the consequences of failures?
skrame01 3 weeks ago
Comment removed
skrame01 3 weeks ago
Comment removed
skrame01 3 weeks ago
Comment removed
skrame01 3 weeks ago
At atmospheric pressure, this engine makes about 9 watts of mechanical power. A regenerator would improve that, and, of course, pressurization is necessary for significantly more power. Consider E.F. Clapham's contest winning 5 cc stirling at the 1977 Model Engineer Exhibition in London; It made 39.4 watts @ 900 rpm, charged with air at ~1000psi. Later,with helium at 1200 psi,it produced 95 watts at 2000rpm. The second place engine produced ~5 watts with air at atmospheric pressure. AR
aross345 3 weeks ago
@aross345 Thank you! I noticed that you are well informed about these types of engines.
leandrojwfolha 3 weeks ago
Very good presentation of your engine! this rotation of its engine is fantastic! especially the engine compression! Congratulations! I really enjoyed. How many rpm your engine has reached and how many watts of electricity it is capable of producing? And how many "cc" is your engine? Thanks in advance.
leandrojwfolha 3 weeks ago
Are the tubes for water cooling?
1shnitsel 3 weeks ago
Hello dood great engine .i am in a need of a Stirling engine {great if two cylinder(please tell a simple one)} that can produce 20W to 100W .I need it for a solar project .
PLEASE HELP
anupamvipul233 2 years ago
@anupamvipul233 IF you had hot side 650C hot and cool side 40C cold (very good active cooling system), and the engine would be with air and atmospheric pressure, you would get 100W at approximately 2 liters volume of the engine! That is HUGE and heavy engine! For 20W you need just 200 ccm. BTW 650 is very hot and 40 is very cold. I would be very surprised, if you reached these temperatures. So the conclusion - you can make stirling which makes just few watts easily. If you need higher power, you
Stepanfo1 1 year ago
@anupamvipul233 ... need big and heavy or high pressure hydrogen or helium filled stirling. There is no easy way how to get interesting power from stirling.
Stepanfo1 1 year ago
@Stepanfo1 It is too early to tell. All stirling engines I have seen do not implement the ideal stirling cycle except one which is only on paper and only one part is finished.
Aviator168 1 year ago
@Stepanfo1 bollacks there are other ways ;-)
acerkiwi 3 months ago in playlist More videos from aross345