Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Experiments & Modifications



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 01-17-2012, 11:05 AM #1
Junior Member
 
Join Date: Jan 2012
Posts: 3
Rep Power: 0
RussW is just really niceRussW is just really niceRussW is just really niceRussW is just really niceRussW is just really nice
RussW RussW is offline
Junior Member
 
Join Date: Jan 2012
Posts: 3
Rep Power: 0
RussW is just really niceRussW is just really niceRussW is just really niceRussW is just really niceRussW is just really nice
Default Laser Powered Stirling Engine

I am working on a project to laser heat a Stirling Engine with a generator mounted to it. I have available 4.5 to 5 VDC and 20 mA. What parts would give me the highest temperarure beam? I am not too concerned about cost in trying to prove a concept but I am financing this out of my own pocket. It has been explained to me that the beam itself has no temperature until the photons have been absorbed. Any advice on how to achieve the highest temperature with only 5 vdc and 20 mA would be most appreciated.



Last edited by RussW; 01-17-2012 at 11:07 AM.
RussW is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 01-17-2012, 11:26 AM #2
bobhaha's Avatar
Class 3B Laser
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
bobhaha bobhaha is offline
Class 3B Laser
bobhaha's Avatar
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

Why are you restricted to 20mA? A typical laser diode will need to be running >100mA to even produce enough heat to sting the skin.

You would be looking at anywhere from 3 - 5W laser output in order to heat the medium (possibly water) enough to turn to steam, while also counteracting heat dissipation due to the water tank acting as a heat sink and also to heat the mass fast enough for use in a model.

Of course this all depends on size...

You will need to explain a little better what your intentions are... (size, material, etc...) and increase your current range if you would like a chance to get this to work.

-Adrian
__________________
Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

Check out my How to Build a Selectable Dummy Load Thread!
bobhaha is offline   Reply With Quote
Old 01-17-2012, 11:39 AM #3
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,739
Rep Power: 41315
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,739
Rep Power: 41315
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

If your setup was 100% efficient... 5V @ 20mA = 0.1 Watts......

You may need to push the wattage a bit higher depending
on the power requirements of your particular Stirling Engine.

@ Bob...
A Stirling Engine can use heat directly... no need to boil water
to create pressure like a Steam Engine...


Jerry
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 01-17-2012 at 11:43 AM. Reason: Spelling errors
lasersbee is offline   Reply With Quote
Old 01-17-2012, 01:16 PM #4
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

Laser diodes usually have an efficiency less than 50%, it would actually be more efficient to use the heat from the laser diode and and let the light escape than the other way around.
__________________
Highlights of my laser collection:
Big Sky Er:YAG - HP 8168D 1480-1570nm tunable laser source - Spectra Physics 3800 modelocked Nd:YAG - lots of IR diodes and bars - LPC-815 200mW 650nm - DL 6353TL 635nm 5mW - HP5501A stabilized HeNe - 2x Melles Griot 05-STP-910 stabilized HeNe - Spectra Physics 3500 Dye laser - REO 30536 543nm 2mW - Coherent DPY315-100 532nm 100mW SLM DPSS - Lexel 85 - 3x B&W tek 10mW 473nm - 445nm 3W Bluefan Sabre module - SF-AW210 150mW 405nm - DPSS inc 355nm 100mW Q-switched

Power meters:
Laser precision RkP-575 w/ RK-5710 - Ophir 10A-V2-SH - Ophir OEM 20C-A - HP 8152A w/ 2x 81521B - Coherent 212 - Anritsu ML93 w/ MA98A - 2x laser precision AM-400 - Leader LPM-8000

Bluefan is offline   Reply With Quote
Old 01-17-2012, 02:10 PM #5
rhd's Avatar
rhd rhd is offline
Class 4 Laser
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
rhd rhd is offline
Class 4 Laser
rhd's Avatar
 
Join Date: Dec 2010
Posts: 8,491
Rep Power: 1392
rhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond reputerhd has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

It's an interesting project -

What I'm not clear on is whether you were wanting to use lasers to POWER the engine, or were looking to use the engine to power a laser. The desired spec of "4.5 to 5 VDC and 20 mA" makes me think that you were hoping to use the engine's electrical output (some generate electricity via a small motor) to power a laser? Many of the stirling engine kits I've seen power a small LED with the electricity they generate, and the specs of those LEDs are probably similar to the parameters you gave. You weren't hoping for a self-sustaining (free energy) build were you?

At any rate, if you're just trying to power the engine itself, I think it would be doable (and cool looking) with a couple 445nm lasers running at ~1.5W each. Depending on your engine design, you'll probably want to have the heat-input area painted black, so that it transfers as much of the beam's power as possible.
__________________
CURRENT WAVELENGTHS:
405|441|450|467|473|495|505|520|532|556|PGLRG|589|594|632|638|660


SAFETY & IMPORTANT READING (threads authored and contributed to by various members of LPF):
- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

rhd is offline   Reply With Quote
Old 01-17-2012, 04:23 PM #6
bobhaha's Avatar
Class 3B Laser
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
bobhaha bobhaha is offline
Class 3B Laser
bobhaha's Avatar
 
Join Date: May 2009
Location: Sydney, Australia
Posts: 3,256
Rep Power: 360
bobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond reputebobhaha has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

Quote:
Originally Posted by lasersbee View Post
If your setup was 100% efficient... 5V @ 20mA = 0.1 Watts......

You may need to push the wattage a bit higher depending
on the power requirements of your particular Stirling Engine.

@ Bob...
A Stirling Engine can use heat directly... no need to boil water
to create pressure like a Steam Engine...


Jerry
Oh man... and I knew that too! I must have been distracted.... Yeah we'll go with that!

Thanks Jerry
__________________
Lasers!
10.6um - >40W CO2 Laser - 25W RF excited CO2 Laser*
685nm - Being built!
660nm - 250mW LOC PowerLight B50 Host - 100mW WL pulsar
635nm - 430mW C6 Host*
632.8nm - Red He-Ne laser ~1mW
593.5nm - Regal 5
542.8nm - Green He-Ne laser ~2.5mW
532nm - 620mW+ lasersman Firedragon III* - 100mW PGL-III-M from JETLASERS* - 70mW Rayfoss Host*
~~~ - 175mW Rayfoss Host - <5mW WL Core - 55mW DinoDirect review laser*

488nm - On the hoist
473nm - 2x CNI lab lasers ~40mW
445nm - 3W Big Boyz Laser - >1.1W Cree C6 Host - 650mW WL Arctic
405nm - 65mW GLP-405 Aquarius host - 160mW 6x Blu-ray MXDL Host
Total: 71,868.5 mW

Goggles!
Laser glow LSG-532-Sport protective eye goggles OD 7+ 190-532nm HIGHLY RECOMMENDED!!
Jetlasers wrap around 190-540nm OD4+ goggles*
Eagle Pair Red OD4+ goggles
Scopeguy20 Blublockers for 405nm lasers!

* indicates a review has been done, on this item.

Check out my How to Build a Selectable Dummy Load Thread!
bobhaha is offline   Reply With Quote
Old 01-18-2012, 12:32 AM #7
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,437
Rep Power: 18210
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,437
Rep Power: 18210
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

Quote:
Originally Posted by RussW View Post
Any advice on how to achieve the highest temperature with only 5 vdc and 20 mA would be most appreciated.
Glue a 25 ohm resistor to the hot part of your stirling engine and apply voltage.

If you must use a laser you could shine it onto the hot part (after painting that black), but the efficiency of lasers at these power levels is very low - at 5V/20mA i'd expect 5 mW optical power at best... not much compared to the 100 mW the resistor delivers.
Benm is online now   Reply With Quote
Old 01-18-2012, 04:50 AM #8
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 2687
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Bionic-Badger Bionic-Badger is offline
Class 4 Laser
Bionic-Badger's Avatar
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 2687
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

Maybe he has a MEMs Stirling engine, but I doubt it.
Bionic-Badger is offline   Reply With Quote
Old 01-18-2012, 11:46 AM #9
Junior Member
 
Join Date: Jan 2012
Posts: 3
Rep Power: 0
RussW is just really niceRussW is just really niceRussW is just really niceRussW is just really niceRussW is just really nice
RussW RussW is offline
Junior Member
 
Join Date: Jan 2012
Posts: 3
Rep Power: 0
RussW is just really niceRussW is just really niceRussW is just really niceRussW is just really niceRussW is just really nice
Default Re: Laser Powered Stirling Engine

According to the videos we may be able to get 100 mA. Here are some videos to help explain.

http://www.youtube.com/watch?v=IDu1kbS9GhY

http://www.youtube.com/watch?v=-8G4GgryJZQ

Variation of KYG stirling engine - YouTube

http://www.youtube.com/watch?v=euG6P..._order&list=UL

http://www.youtube.com/watch?v=aTq6n..._order&list=UL

ƒXƒ^[ƒŠƒ“ƒOƒTƒCƒNƒ‹EƒIƒ“ƒ‰ƒCƒ“

I don't think we are talking perpetual because we are operating using a temperature differential which would use the ambient air temperature as a form of potential energy.

Once again thanks for the info and any advice is appreciated.

Just as a reminder we are looking for the most heat with maybe 100mA and 5 vdc.

Also I am a novice to the world of lasers so please forgive my ignorance.

Last edited by RussW; 01-18-2012 at 11:47 AM.
RussW is offline   Reply With Quote
Old 01-18-2012, 11:27 PM #10
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 2687
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Bionic-Badger Bionic-Badger is offline
Class 4 Laser
Bionic-Badger's Avatar
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 2687
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

100mA is not going to produce much power, probably not even enough to burn or even hurt your skin. People can barely pop black balloons with weak lasers like that. You'll need a laser that is a few orders of magnitude more powerful to run something like at Stirling engine, at least one the size of the one you've shown.

To give you a better picture of how much energy is needed, here is a Stirling engine running via a large Fresnel lens and sunlight:



That Fresnel lens is about 1 m^2 in area, which means it is essentially concentrating a kilowatt of energy onto that spot to cause the Stirling engine to operate, much of which is far infrared heat energy, not just visible light.

Compare that to your 5V 100mA laser at 100% efficiency, which is 0.5W. Half a watt is more than three orders of magnitude less powerful than the output of that Fresnel lens above. You're not going to cause any Stirling engine to operate short of one smaller than a thumbtack--if you could manufacture one.

Last edited by Bionic-Badger; 01-18-2012 at 11:28 PM.
Bionic-Badger is offline   Reply With Quote
Old 01-20-2012, 02:34 AM #11
millirad's Avatar
Class 3B Laser
 
Join Date: Apr 2009
Location: No. California
Posts: 2,576
Rep Power: 297
millirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond repute
millirad millirad is offline
Class 3B Laser
millirad's Avatar
 
Join Date: Apr 2009
Location: No. California
Posts: 2,576
Rep Power: 297
millirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

The smaller the stirling engine is and the more powerful the radiant source, will determine whether you sink or swim. ;-)
__________________
Greenie - 100mw in diy aluminum host
650nm - 260mw in MXDL host with brass heatsink
650nm - 325mw in stainless Raygun host. The dot is so bright it's
PINK/ORANGE!
Thanks Jay! Thanks Drew! Thanks Larry! Thanks Glenn! Thanks Dave!

Pink - 500mW (white w/red , ok not till later)
Please don't dazzle aircraft! You wouldn't hit someone in the face normally would you?
Home of the stainless RAYGUN !

Last edited by millirad; 01-20-2012 at 02:35 AM.
millirad is offline   Reply With Quote
Old 01-20-2012, 02:51 AM #12
millirad's Avatar
Class 3B Laser
 
Join Date: Apr 2009
Location: No. California
Posts: 2,576
Rep Power: 297
millirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond repute
millirad millirad is offline
Class 3B Laser
millirad's Avatar
 
Join Date: Apr 2009
Location: No. California
Posts: 2,576
Rep Power: 297
millirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond reputemillirad has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

Here's something related...............................

Single particle is the smallest Stirling engine yet - physics-math - 12 December 2011 - New Scientist

Quote:
The 200-year-old Stirling engine has inspired a power generator made of a single particle just 3 micrometres wide.

Overshadowed by its steam and internal combustion brethren, the Stirling engine is a quiet, efficient alternative that compresses a fixed amount of gas inside a cylinder.

As it is compressed, the gas heats up and expands, pushing a piston, before cooling due to the loss of energy, only to be compressed again.

In their tiny mimic, Clemens Bechinger and Valentin Blickle at the University of Stuttgart, Germany, replaced the cylinder with a laser that confines the motion of a 3-micrometre-wide lump of melamine in water.
Pent-up particle

A zap of heat from another laser builds up tension in this optical "trap": like a compressed gas, the particle is aching to break free. Widening the trap by modifying the first laser lets it do so, expending the pent-up energy.

"The use of a laser source to provide the required rapid localised heating on the microscopic scale appears to be novel," says Alan Tucker, leader of the Stirling Cycle Research Group at the University of Canterbury in Christchurch, New Zealand. He calls the technique sophisticated but says that he "struggles" to envision any practical applications.

But Bechinger says that the microscopic engine is allowing his team to investigate the balance between maximum power and maximum efficiency on the nanoscale – which could in turn inform the design of future micromechanical machines.

Journal Reference: Nature Physics, DOI: 10.1038/nphys2163
__________________
Greenie - 100mw in diy aluminum host
650nm - 260mw in MXDL host with brass heatsink
650nm - 325mw in stainless Raygun host. The dot is so bright it's
PINK/ORANGE!
Thanks Jay! Thanks Drew! Thanks Larry! Thanks Glenn! Thanks Dave!

Pink - 500mW (white w/red , ok not till later)
Please don't dazzle aircraft! You wouldn't hit someone in the face normally would you?
Home of the stainless RAYGUN !
millirad is offline   Reply With Quote
Old 01-21-2012, 01:43 PM #13
Bluefan's Avatar
Class 3R Laser
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Bluefan Bluefan is offline
Class 3R Laser
Bluefan's Avatar
 
Join Date: Aug 2009
Location: The Netherlands
Posts: 1,482
Rep Power: 62
Bluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond reputeBluefan has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

I've seen a stirling engine run sitting op top of a cup of hot water. 0.5W is still too little, but not 3 orders of magnitude off.
__________________
Highlights of my laser collection:
Big Sky Er:YAG - HP 8168D 1480-1570nm tunable laser source - Spectra Physics 3800 modelocked Nd:YAG - lots of IR diodes and bars - LPC-815 200mW 650nm - DL 6353TL 635nm 5mW - HP5501A stabilized HeNe - 2x Melles Griot 05-STP-910 stabilized HeNe - Spectra Physics 3500 Dye laser - REO 30536 543nm 2mW - Coherent DPY315-100 532nm 100mW SLM DPSS - Lexel 85 - 3x B&W tek 10mW 473nm - 445nm 3W Bluefan Sabre module - SF-AW210 150mW 405nm - DPSS inc 355nm 100mW Q-switched

Power meters:
Laser precision RkP-575 w/ RK-5710 - Ophir 10A-V2-SH - Ophir OEM 20C-A - HP 8152A w/ 2x 81521B - Coherent 212 - Anritsu ML93 w/ MA98A - 2x laser precision AM-400 - Leader LPM-8000

Bluefan is offline   Reply With Quote
Old 01-21-2012, 04:08 PM #14
Bionic-Badger's Avatar
Class 4 Laser
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 2687
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Bionic-Badger Bionic-Badger is offline
Class 4 Laser
Bionic-Badger's Avatar
 
Join Date: Oct 2007
Location: Oregon, USA
Posts: 5,478
Rep Power: 2687
Bionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond reputeBionic-Badger has a reputation beyond repute
Default Re: Laser Powered Stirling Engine

It definitely depends on the size of the engine. The Stirling engine running on a cup of hot water was tiny and with a large surface area on top of the cup. Plus water takes quite a bit of energy to bring up to temp. If you're going to run one like the solar video above, you're still looking at a kilowatt.
Bionic-Badger is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 03:41 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC