Recent content by TechFan

datasheet:http://cache.freescale.com/files/sensors/doc/data_sheet/MPX5100.pdf -page 5 warns parameters are specified for dry air as media. Other types of media may affect its performance. You are using water... -page 5 shows the voltage output vs. pressure. That if the sensor is Ok at the...

which sensor are you using?

Wow that is awesome!. Thanks.

Hi: Interesting info. I'll experiment trying to code that somehow (?) and see the results. My goal is just having an acceptable "visual effect", although using the real equation will be much better. The real question would be: What is the equation for the change in rpm with time (angular...

Hi: I'm building a computer simulation for a 3 gear train system. So far the gears rotate with mouse movement horizontally. Now I'm adding a fictitious motor and braking system to start/stop rotation with mouse clicks. I multiplied the rotation angle by [1-e(-t/TC)] to simulate exponential...

I'm kind of exhausted from this thread already. Trying to understand and find meaning to so many posts and experiments made me loose interest on this. I’m out until it gets interesting again.

"...I just researched the cost of mirrored stainless steel. The sheet in their design costs roughly $300..." These are hypothetical calculations which do not necessarily have to be what implementing the system can cost him. As a doer yourself, you know, individual cost depends and varies...

"...So, by my rough calculations, the device will be able to cool down my bedroom 11°C, but it will take 12 days..." Then what you do is to increase the size of the thing and use a fan to circulate air through the evaporator and you have come up with a motor less solar AC unit. You are trying...

"...and the oil helps to make a good enough seal for the compressor, I believe..." Rethinking on that one, yes that's another role played by the oil.

"...I don't quite get your design. Doesn't the compressed refrigerant need to expand to a larger volume (and lower pressure) in section E, in order to cool? ..." Yes. Its also missing a check valve between sections C and D to avoid the refrigerant coming back to C when the piston returns. I...

As mentioned before, I do not necessarily disagree with all you've said.

"...You surely can't think I was 'getting at' anyone here??..." Thanks for the clarification. My reference to existing commercial products, was just to prove the point that these things exist, and they work, despite many theoretical analysis here which contradict that. We all know DIY projects...

I suspect the line freq. (50Hz-60Hz) should not be an issue and the "freq. error" should refer in some way to the Ultrasonic freq. somehow. I'd try to contact the manufacturer tech support to solve the problem or look in the manual for the meaning of that error.

"...One thing is for certain: the best solution for the individual is seldom the best solution for the flashy Green Salesman! Money changes everything..." I don't see the connection of that statement with this thread, nobody is trying to sell anything here as far as I know, we are all giving our...

"...Absolutely no moving parts apart from the circulating fluids..." Exactly. "...They have a very low COP compared with compressor types..." That was already mentioned and we agreed on that; but we also discussed the original poster wanted to use direct sunlight and no PVs. The Absorption...