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  • Users: dkm0038
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  1. dkm0038

    joining to a surface aluminum body panels

    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...
  2. dkm0038

    variable thickness glass sourcing

    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...
  3. dkm0038

    amps from a wind generator

    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...
  4. dkm0038

    N VALUE QUESTION

    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...
  5. dkm0038

    CONSTANT SURFACE TEMP VS CONSTANT HEAT FLUX

    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...
  6. dkm0038

    CO2 SATURATION TABLE

    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.
  7. dkm0038

    PUMP HORSE POWER QUESTION

    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...
  8. dkm0038

    ASME U and UM help

    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.
  9. dkm0038

    PUMP SELECTION

    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
  10. dkm0038

    CRITICAL POINT OF WATER QUESTION

    I was looking at a water/vapor table and I noticed something interesting and am curious if anyone can give me a good explanation why. That is when you increase the pressure of liquid water and you approach the critical point the density of the liquid decreases. It seems weird to me that when...
  11. dkm0038

    heat exchanger pressure drop

    I am going to setup an experiment to test pressure drops of a heat exchanger and am a little niave in this area. I am going to have two buckets open to atmosphere with the liquid going through the heat exchanger. the first bucket has the hot liquid going in while the second bucket has that...
  12. dkm0038

    tap problem

    I have a large galvanized steel bucket and I want to tap the bottom side so the fluid in the bucket can be poured out via 1/2 inch pvc pipe. I was hoping to get some advice on what would be the best/easiest way of doing this with standard parts?
  13. dkm0038

    charge air for engines

    I am studying a design for test engine facility and would like help and inputs on the charge air cooling system. The heat load was given as 150Kw and that is about it. I am wondering if there is a standard temperature drop used charge air in engines and if the air is typically compressed at...
  14. dkm0038

    polypropylene glycol-water mixture

    I cannot seem to find fluid properties (density, spec heat, therm cond, or viscosity) for a 50/50 mixture of polypropylene glycol/water mixture. I am going to need the fluid properties for this mixture across a range of temps, (100-300F). If anyone knows a good source where i might find this...
  15. dkm0038

    power lines?

    I was always wondering something and hoped someone in hear had an answer... Why do they set up power lines above ground on those elevated power line poles as opposed to burying them underground. To me its seems more logical to run them underground, you dont have to buy all of those large...
  16. dkm0038

    propane gas properties

    For some reason I cannot find any tables on the properties of gas propane and have spent way to long looking. Can anyone can refer me to a good site that gives properties of gas propane (density, viscosity, thermal conductivity and specific heat) at atmospheric pressure over a range of...
  17. dkm0038

    watt density?

    I am using an electric heating element to heat up some SAE 10 hydraulic oil. Someone warned me to be carefull about the watt density of heating element, that is if the liquid is too dense or viscous you can actually overheat and ruin the electric heating element. does anyone have any experience...
  18. dkm0038

    pressure drop

    I was wondering if anyone could refer me to a good equation or reference that calculates the pressure drop in a tube header. the tube header is a simple tube with both ends capped off and an inlet on the top left with a large diameter feeding into many smaller circuits on the right with small...
  19. dkm0038

    copper soldering

    Can I solder (with a regular butane or propane torch) copper and steel? if so what kinda of flux and solder material is used.
  20. dkm0038

    STEAM FLOW

    I have a question about steam flow... I have recieved specs from a steam turbine generator that the steam leaving it is at 4000 lb/hr. To find the velocity I simply divide by its density and the cross sectional area. This steam is then going to be condensed to water. It seems that the mass...

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