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Thanks guys. That's what I thought. My instincts went in that direction. The reason I questioned it is because a couple techs said it couldn't be done, but I didn't fully believe them. You made my day. Cheers and stars to you.

Hello All, this is a rather rudimentary question, but I wanted to know if it's possible to MIG weld low carbon steel to stainless steel tubing, and why? My instincts say not under normal conditions because of their different compositions, but I'm willing to try it anyhow. If anyone has any...

Thanks for your replies. 25362, that book is pretty good. I have another called gieck and gieck (or geek and geek). tunalover, basically I have a 1.2m parabolic dish and I'm trying to determine what the maximum useful energy can be extracted from this device. It's like a 2nd law efficiency...

Well, the first 3 will not be effected. i.e. Rayleigh scattering, aerosol extinction, and ozone absorption since they are mostly effected above the 6000 ft elevation you described. However, because of reduced pressure at that higher elevation, you should see a decrease in the amount of water...

1000 W/m^2 would be a gross assumption. No, at max, there is 700 W/m^2 at the surface of the earth. In outer space, just above the earth's atmosphere the solar flux is 1367 +/- 2- W/m^2. There are 5 major factors which reduce solar flux. Rayleigh scattering, aersol extinction, ozone...

Hello, I was wondering if anyone knows of a better way to determine the solar irradiation, at the Earth's surface, than with using ASHRAE's ClearSky Model, which uses a Cn constant to approximate the solar flux? If you know of any, and are almost as simple to use as the ASHRAE model, I would...

Efficieny in this instance would be the 2nd law efficiency: that is the total amount of energy transfered divided by the total possible heat that could be transfered. From there you could determine how effective your h.e. design is and how much more this design could be improved. I hope that...

What do you mean by conventional means? Photovoltaic? I want to use a micro engine because I want to determine the efficiency of converting solar thermal into useful electrical energy. Apparently, a solar stirling system can have efficiencies of ~40%, whereas a PV is ~10-18% efficient.

I have a problem finding a supplier that sells microturbines (i.e. brayton or rankine cycle) or even a stirling engine that can withstand high temperatures (i.e. T > 300 deg C). This engine is to be used in estimating the solar thermal flux impinging on a 3-d parabolic collector. This engine...