Recent content by anolan23

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    I Equalizing Pressure in Pipe for Safe Container Design

    heres my excel
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    I Equalizing Pressure in Pipe for Safe Container Design

    It's saying a lighter gas allows for a higher rate of pressurization. I would have thought the opposite
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    I Equalizing Pressure in Pipe for Safe Container Design

    How can I account for gases other than air being used? Just change the R value?
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    I Equalizing Pressure in Pipe for Safe Container Design

    yeah that's a mistake thx
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    I Equalizing Pressure in Pipe for Safe Container Design

    0.63 X 2.54 is equal to 1.6, but there was another error in the denominator I believe. Yes, 95psi/sec. You're right I didn't add 95+14.7 when comparing. Let me know if you can't read the had calculations
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    I Equalizing Pressure in Pipe for Safe Container Design

    Nvm I made an error. It calculates out. I adjusted the SQRT(0.63) that you calculated and it comes out to be SQRT(0.1608). Attached is my numerical solution to the dp/dt equation. IT doesn't make sense that the pressure inside the container is already at 100psi at 1 sec since the rate of...
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    I Equalizing Pressure in Pipe for Safe Container Design

    http://imgur.com/a/IfYvT Chestermiller, I'm doing the Forward Euler to estimate the solution, but when calculating the first solution it's making me take the square root of a negative number. Did you have this problem?
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    I Equalizing Pressure in Pipe for Safe Container Design

    Okay same thing. Thx
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    I Equalizing Pressure in Pipe for Safe Container Design

    Oh that was for the older solution. How do you solve the equation numerically?
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    I Equalizing Pressure in Pipe for Safe Container Design

    what value should I use for μ, air viscosity?
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    I Equalizing Pressure in Pipe for Safe Container Design

    I tried to solve the integral through SMath, but when calculating the Constant at the initial condition p(0), it says it cannot solve for C because there are no real roots. http://imgur.com/a/mxSeB
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    I Equalizing Pressure in Pipe for Safe Container Design

    The MV/RT equation doesn't compute to that value, unless it's (2.54)^2 instead of 2.54^3 for the conversion of the volume
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    I Equalizing Pressure in Pipe for Safe Container Design

    Are there some errors in the numbers you put in the above equations? If so, I think you may be human.
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    Temperature on the outer surface of insulation

    The only math is the temperature difference divided by R value per inch (182/4)? How is the 1 degree temp difference included in that? Is the 1 BTU/Hr/Ft^2 the convection on the outside ?
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    Temperature on the outer surface of insulation

    To 1 Degree Fahrenheit. online calculator is fine. I calculated the Qrate to be 340W, but that is assuming 1.5 inches. http://imgur.com/a/HyIOF I want to calculate the thickness needed to reach 32F from purely conduction