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  1. Tonylmiller

    Calculation of Solar Heat Gain on Large Insulated Outdoor Vessel

    I need to calculate the heat flux into a large, outdoor vessel, which is about 60 feet diameter and 40 feet tall, with a domed roof. I have all the dimensions and insulation details. The insulation is styrofoam with a reflective metal jacket. The vessel is about -20 F inside. My question is...
  2. Tonylmiller

    Vacuum Protection on Pressure Vessel

    I am working on a relief system for a Section VIII vessel rated at 60 psi MAWP. I am familiar with overpressure protection, but I am wondering about vacuum protection on this vessel. If a scenario exists that could produce a vacuum, do I need to provide a vent for that? The U1 report for the...
  3. Tonylmiller

    Relief Valve Calculation on Vessel Jacket

    I'm calculating the relief valve requirement of a fire case for a water-filled jacket on a vessel. I'm planning to calculate the heat from the fire, calculate the vapor generation, and then convert it to the same volume of liquid (at relief pressure) since liquid will be pushed out the relief...
  4. Tonylmiller

    Consider Non-Recoverable Losses in Relief Valve Outlet Piping?

    I understand that recoverable losses (such as due to velocity change in an enlarger) are NOT considered in pressure drop calculations for the inlet piping for a relief valve (API RP 520). Does the same apply to the exit piping? Sometimes considerable enlargements in the outlet piping take...
  5. Tonylmiller

    Calculate Heat Capacity Ratio of a Gas

    I have heat capacity at constant pressure, Cp (but not Cv), critical compressibility, critical pressure, temperature, volume, and some other physical properties of the gas. The gas is tetrafluoroethylene, otherwise known as TFE or R1114. Does anyone know of a way to estimate or calculate the...
  6. Tonylmiller

    Calculate Control Valve Two Phase Flow

    I have a Cv for a control valve, and the material flowing consists of 15% ammonia in the liquid phase and some inert gases. I am not concerned with flashing of the ammonia, since the pressure is 300 psia and ambient temperature. I need to calculate the flow rate at a given pressure...

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