Search found 19 matches

by stuffandthings
Sat Jan 18, 2014 10:28 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Is the mm5 coffee cup Stirling engine completely airtight?
Replies: 8
Views: 5449

Re: Is the mm5 coffee cup Stirling engine completely airtigh

Thanks.
Is there any real-life scenario in which both ends of a Stirling engine would increase by an equal temperature?
by stuffandthings
Fri Jan 10, 2014 8:08 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Is the mm5 coffee cup Stirling engine completely airtight?
Replies: 8
Views: 5449

Re: Is the mm5 coffee cup Stirling engine completely airtigh

Thanks. I knew about the law, I was just asking to know if it translated to real-life performance.
by stuffandthings
Fri Jan 10, 2014 6:47 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Is the mm5 coffee cup Stirling engine completely airtight?
Replies: 8
Views: 5449

Re: Is the mm5 coffee cup Stirling engine completely airtigh

If I were to increase the temperature of both ends of a Stirling engine by an equal amount (keeping a constant temperature difference), would the efficiency decrease?
by stuffandthings
Sun Jan 05, 2014 11:04 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Is the mm5 coffee cup Stirling engine completely airtight?
Replies: 8
Views: 5449

Re: Is the mm5 coffee cup Stirling engine completely airtigh

I had to eventually change the project. Thanks for all of your help. Instead, I will be increasing the temperature of the hot and cold ends of the engine by an equal amount while maintaining a constant temperature difference, which should decrease efficiency. Will placing an ltd-engine on dry ice or...
by stuffandthings
Tue Dec 24, 2013 12:16 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: New Members PLEASE read! - OR, having problems registering, being deactivated
Replies: 511
Views: 515214

Re: "Hi" We are new here!

Hi!

I've recently been fascinated by Stirling engines, and I'm doing a project on them.

The people on this forum have been super helpful!
by stuffandthings
Tue Dec 24, 2013 11:57 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Is the mm5 coffee cup Stirling engine completely airtight?
Replies: 8
Views: 5449

Is the mm5 coffee cup Stirling engine completely airtight?

It's in the title. I need to increase an engine's pressure by increasing ambient pressure for a science project, and I obviously can't do that if the engine's completely airtight.
by stuffandthings
Wed Dec 18, 2013 5:02 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Operating a Stirling Engine Inside a Pressure Vessel
Replies: 6
Views: 4120

Re: Operating a Stirling Engine Inside a Pressure Vessel

Ian S C Would the crankshaft simply not move in a pressurized atmosphere? MSOEStirlingTeam I know increasing ambient temperature would introduce other inefficiencies due to Carnot's law, but would increasing temperature have the same effect? By making particles move faster, it also would cram more p...
by stuffandthings
Tue Dec 17, 2013 6:31 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Operating a Stirling Engine Inside a Pressure Vessel
Replies: 6
Views: 4120

Re: Operating a Stirling Engine Inside a Pressure Vessel

I'm heating a ltd Stirling engine with hot (almost-boiling) water You would have to especially make a pressurized engine right? A tutorial for a small ltd Stirling engine stated to glue together three pieces of metal to form the pressure chamber. I know the pressure in the two ends of the engine cha...
by stuffandthings
Sun Dec 15, 2013 8:43 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Instructions on building a small coffee-cup Stirling engine?
Replies: 2
Views: 2840

Instructions on building a small coffee-cup Stirling engine?

Could someone direct me to instructions on building a small Stirling engine?
It must be able to run on a 100o F temperature differential, and it must be able to fit in a 3 x 4 inch oval opening.

Thanks.
by stuffandthings
Sat Dec 14, 2013 9:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Operating a Stirling Engine Inside a Pressure Vessel
Replies: 6
Views: 4120

Operating a Stirling Engine Inside a Pressure Vessel

I will be doing a science project on the effect of air pressure on the efficiency of a Stirling engine. I don't have the mechanical skills to build a pressurized Stirling engine, so I have decided to operate a regular LTD Stirling engine inside a pressure vessel. I will use a tachometer to measure t...
by stuffandthings
Mon Dec 09, 2013 8:24 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: How do you measure the efficiency of a Stirling engine?
Replies: 2
Views: 2812

How do you measure the efficiency of a Stirling engine?

I know the formula is work done / heat input

But how would you get working efficiency in a percentage? How would you measure work done and heat
I'm talking about practical efficiency, not the theoretical maximum efficiency defined by Carnot's limit.
by stuffandthings
Sun Dec 08, 2013 12:59 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: stirling engine with helium/hydrogen/other gases
Replies: 7
Views: 8344

Re: stirling engine with helium/hydrogen/other gases

Thank you, that clarifies a lot!

But why would increasing pressure by increasing the mass of gas within a fixed volume have anything to do with the tenperature ratio?
by stuffandthings
Sat Dec 07, 2013 9:52 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Is it possible to change the fluid of a stirling engine?
Replies: 10
Views: 5977

Re: Is it possible to change the fluid of a stirling engine?

I know I've said this on another post, but Is there any way to pressurize a Stirling engine by increasing ambient temperature? If a Stirling engine isn't pressurized, it has atmospheric pressure. So if you were to put the Stirling engine inside a pressure vessel, would it have the pressure of the ve...
by stuffandthings
Sat Dec 07, 2013 9:35 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: stirling engine with helium/hydrogen/other gases
Replies: 7
Views: 8344

Re: stirling engine with helium/hydrogen/other gases

Is there any way to pressurize a Stirling engine by increasing ambient temperature?
If a Stirling engine isn't pressurized, it has an atmospheric pressure. So if you were to put the Stirling engine inside a pressure vessel, would it have the pressure of the vessel?
by stuffandthings
Wed Dec 04, 2013 11:47 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Is it possible to change the fluid of a stirling engine?
Replies: 10
Views: 5977

Re: Is it possible to change the fluid of a stirling engine?

I've needed to make yet ANOTHER change so in essence, all i want to do is to pressurize a Stirling engine could I do this by putting a Stirling engine into a container that can withstand pressure and then heating that container to raise pressure? i would put both the heating source and the cooling s...