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what are the best options for joining things to body panels? I've got an aluminum body panel that i'd like to attach a few brackets to the b-side w/o any exposed fasteners or read thru to the a-side. it could be supporting up to ~10lb and would see some good vibration and wind load. first...

anyone have any pointers for sourcing variable thickness glass (or any durable transparent material). having a need for a couple pieces roughly around 1' x 6' in size and variable thickness of ~1/4" at top and increasing to ~1" at bottom. It'll need to be durable, comparable to automotive side...

rbulsara, I have average wind speed from the last 49 years at the site in question, and it is 10.7 mi/hr (this is where i get my 1000 kwHr from) The 450 amps is actually amps per hour.

Thanks Waross for the very helpful reply but can you please explain why you did -> "For 3 phase, divide that by 1.73 for 66 Watts per phase". Also does this amperage seem reasonable to you, this is for a single wind generator (11 meters high with normal wind conditions).I am seeing if it is...

I am considering if a wind generator can provide me enough amperage. I have a graph of the annual energy production that shows the annual output in kWHr, and am a little confused in what that means (ie kWHr/year or average kWHr??) the values are 0-4000. The bottom line is that I know that I...

I have found some stuff concerning my original question... The equation seems to be of the form Cp = [n R]/[M (n-1)] where Cp = the specific heat R = is the universal gas constant M = molecular weight n = the 'N value' from above (possible ratio of specific heats/or something concerning the...

there is a term called 'n value' it is used in industry for gas mixtures as a means of calculating the specific heat, and maybe other things. there is an equation that gives the specific heat and is a function of 'n value', molecular weight, and maybe a couple other things for a mixture of...

Can someone please help me or refer me to a good resource. I would like to know more about the 'n value' used for gas mixtures to calculate physical properties for a mixture of gases. I would specifically like to know how to get it and the equations it is used in. I have been searching for a...

Anybody?

I appologize for the caps, didn't realize it. As I said it is for an air cooled heat exchanger, hot fluid is going through the tubes and cool ambient air is blown over it to cool the hot fluid.

I HAVE A HARD TIME UNDERSTANDING THE APPLICATION OF CONSTANT SURFACE TEMPERATURE AND CONSTANT HEAT FLUX. AND WAS HOPING SOMEONE CAN DUMB IT DOWN FOR ME. FOR AIR COOLED HEAT EXCHANGERS THE INTERNAL HEAT TRANSFER COEFFICIENT'S NUSSELT NUMBER VALUE FOR THE LAMINAR REGIME DEPENDS ON BEING EITHER...

25362, I am well aware of NIST, if you check out their saturation properties for CO2 vapor you'll notice that it doesn't help with my question above

Does anyone know where I can find a saturation table for co2 for temperatures above 304.128 K. Everyone I find ends at this temperature. I know its CO2's critical temp but I am going to use it at a pressure less than its critical pressure. Can anyone help.

I've been looking at gear pumps and notice that you'll need to purchase a motor seperately. What are the general considerations when selecting a motor for a given gear pump? And would a gear pump be advisable for pumping hot oil?

thanks lcarter157, So is it right to say that as long as you have a powerful enough pump then it will produce a constant flow rate within a range of total head?

I've seen the correlation of (hydrualic horsepower) = (total head)x(flow rate)/(constant) I want to set up a system in which it is important to maintain a constant flow rate but with a varying total head. but does the above equation mean that if I have a certain hp pump then the flow rate...

Is there any public or free information of ASME U and UM stamp requirement standards? Such as tube thickness or flange size for given pressures.

Its to test heat transfer and pressure drop in heat exchangers. I am going to have a tank that holds the oil and then pump it through the heat exchanger to another holding tank.

I would like an opinion for what type of pump would be best for sae 10 hydraulic oil at 120 F pumping at no more than 5 gallons per minute. Thank you

Isn't the thing about critical point of water that the physical properties of liquid and vapor merge (ie the density) this must happen at high pressure and temperature(22,090 kPa and 374.14 C). So lets say you have water at 30 C with a density of 996.0 kg/m3 at a pressure of 4.246 kPa and you...