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  • Users: Cool SH
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  1. Cool SH

    Relief Unloading Valve and Pulsation Damper in Hydraulic System

    Refer to the photo. Unloading valve set pressure = 130 bar Pulsation damper pre-charge N2 pressure = 50 bar Pulsation damper nominal liquid volume = 1 liter Consider the following scenario. Pulsation damper gas valve is leaking gas. As liquid is incompressible, in order to reach 130 bar...
  2. Cool SH

    Anyone know what this equation represent?

    I came across an excel sheet, which can calculate the tube exit surface temperature in fire tube boiler. E = exp (Surface area*U/Flue gas weight*Cp) Where, U = Overall heat transfer coefficient Cp = Specific heat at constant pressure Tube gas exit temperature = [(FEGT - Tsat)/E] + Tsat...
  3. Cool SH

    Fire Tube Boiler: Spiral Retarders in tube analysis

    Dear All, I am having trouble to finding the heat transfer coefficient of spiral retarders. The sketch of the tube is shown in the link. [highlight #FCE94F]My objective is the find the heat transfer coefficient for the spiral retarders[/highlight]. With retarders, a turbulent flow will be...
  4. Cool SH

    Tube gas exit temperature in fire tube?

    Hello ladies and gentlemen, My objective is to find the tube exit gas temperature in fire tube boiler. I know the rate of heat transfer, Q=m.c.delta T, should be equal between gas and water side. Anyway, I have work out the analysis as attached. However, I just cannot seem to get the final...

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