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  • Users: sav455
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  1. sav455

    Fire case Relief

    Hi All, I am wondering if the relief rate form a PSV sized for fire case is dependent upon plant feed rate. Let's say we want run an existing plant at 130% capacity and do the debottleneck work. Do we need to rerate the fire case relief also?? The equations in API 521 don't indicate the same...
  2. sav455

    Gas Blowby case

    Hi, I am trying to calculate the gas blowby case flowrate from high pressure separator to low pressure separator. I am wondering if I can use the max Cv of the liquid level control valve. The Cv by definition is the related to the flow rate of water at 1 psi pressure drop. In gas blowby case we...
  3. sav455

    Volume reduction in mixing of liquid hydrocarbons

    Hi All, I am required to calculate the reduction in volume of liquid hydrocarbons upon mixing. The detail of the problem is as follows: I have three stream: naphtha, distillate and gas oil.These ssreams can be routed to different tanks.I did a quick simulation in HYSYS and found that there is...
  4. sav455

    Mine diesel production

    Hi, I am working on developing a scheme for production of 15 ppm diesel from naphtha and kerosene stream. Basically I am trying to get to some scheme which gives me minimum heater duty, minimum no. of stages,min. col diameter, optimum tray location for both the feeds and optimum diesel draw...
  5. sav455

    Electrical Heaters for Process Unit

    Hi All, I have a heat exchanger which heats a small stream (referred to as slip stream, flow not known)to 250 degC using 4800 kPag satrated steam. The amount of steam for this heater is 159 kg/h. The heat duty as given in heat balance is 0.26 Gj/h. I was just wondering if it makes sense to...
  6. sav455

    PSA off gas line sizing

    Hi, I am trying to size a low pressure gas line (Hydrogen PSA off gas,MW = 27.89,actual vol flow = 8.749e4 m3/h,inlet pressure = 131 kPa, 32 deg C) for feeding to CO2 recovery unit.The 24" NPS Sch 40 line is giving me a total pressure drop of 6.5 kpa(total equivlent length is 250 mtrs),and the...
  7. sav455

    Temperature Correction for Liquid Flow

    Hi All, I have to prepare mass balance report and that involves the correction of flows as shown by orifice meter to it design P and T values.Could you help me about it??The fluids are Naphtha and Gas oil boiling cuts. Regards.
  8. sav455

    Hydraulic analysis

    Hi All, I did a HYSYS simulation for hydraulic analysis of sour water system. The system includes change in elevations.On points where there is decrease in elevation i.e. the pipe is coming down HYSYS shows an increase in stream pressure. My question is, Is it logical from fluid flow point of...
  9. sav455

    Approach to equilibrium for hydrogen unit

    Hey Guys, I need a typical calculation procedure for calculating approach to equilibrium for a steam natural gas reformer. Could anyone help me out?? SAV455

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