PT. Indira Dwi Mitra - Fabrikasi boiler dan thermal oil heater Indonesia

Steam header Calculator

25 Apr

Steam header Calculator

Calculates the combined steam properties of multiple steam inlets.

Number of Inlets
Header Pressure *  psig

Inlet 1

Pressure*  psig
 *  °F
Mass Flow *  klb/hr

Inlet 2

Pressure*  psig
 *  °F
Mass Flow *  klb/hr

Inlet 3

Pressure*  psig
 *  °F
Mass Flow *  klb/hr

Inlet 4

Pressure*  psig
 *  °F
Mass Flow *  klb/hr
* Required  [reset]
Examples: Mouse Over

Inlet 1

Mass Flow 93.3 klb/hr
Pressure 485.8 psig Sp. Enthalpy 12.2 btu/lbm
Temperature 42.7 °F Sp. Entropy 0.022 btu/lbm/R
Phase Liquid Energy Flow 1.1 MMBtu/hr

Inlet 2

Mass Flow 3.0 klb/hr
Pressure 406.9 psig Sp. Enthalpy 29.5 btu/lbm
Temperature 60.2 °F Sp. Entropy 0.056 btu/lbm/R
Phase Liquid Energy Flow 0.1 MMBtu/hr

Inlet 3

Mass Flow 35.9 klb/hr
Pressure 574.8 psig Sp. Enthalpy 284.0 btu/lbm
Temperature 312.9 °F Sp. Entropy 0.454 btu/lbm/R
Phase Liquid Energy Flow 10.2 MMBtu/hr

Combined Header

Mass Flow 169.0 klb/hr
Pressure 224.4 psig Sp. Enthalpy 82.3 btu/lbm
Temperature 113.6 °F Sp. Entropy 0.153 btu/lbm/R
Phase Liquid Energy Flow 13.9 MMBtu/hr

Inlet 4

Mass Flow 36.8 klb/hr
Pressure 237.2 psig Sp. Enthalpy 67.4 btu/lbm
Temperature 98.7 °F Sp. Entropy 0.127 btu/lbm/R
Phase Liquid Energy Flow 2.5 MMBtu/hr

Calculation Details

Step 1: Determine the properties and energy flows for the inlets

Using the Steam Property Calculator, properties are determined using Inlet Pressure and the selected second parameter (Temperature, Specific Enthalpy, Specific Entropy, or Quality). The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow:
Inlet1

  • Pressure = 485.8 psig
  • Temperature = 42.7 °F
  • [Steam Property Calculator] => Specific Enthalpy = 12.2 btu/lbm
  • Inlet Energy Flow = Specific Enthalpy * Mass Flow
    Inlet Energy Flow = 1.1 MMBtu/hr = 12.2 btu/lbm * 93.3 klb/hr ]

Inlet2

  • Pressure = 406.9 psig
  • Temperature = 60.2 °F
  • [Steam Property Calculator] => Specific Enthalpy = 29.5 btu/lbm
  • Inlet Energy Flow = Specific Enthalpy * Mass Flow
    Inlet Energy Flow = 0.1 MMBtu/hr = 29.5 btu/lbm * 3.0 klb/hr ]

Inlet3

  • Pressure = 574.8 psig
  • Temperature = 312.9 °F
  • [Steam Property Calculator] => Specific Enthalpy = 284.0 btu/lbm
  • Inlet Energy Flow = Specific Enthalpy * Mass Flow
    Inlet Energy Flow = 10.2 MMBtu/hr = 284.0 btu/lbm * 35.9 klb/hr ]

Inlet4

  • Pressure = 237.2 psig
  • Temperature = 98.7 °F
  • [Steam Property Calculator] => Specific Enthalpy = 67.4 btu/lbm
  • Inlet Energy Flow = Specific Enthalpy * Mass Flow
    Inlet Energy Flow = 2.5 MMBtu/hr = 67.4 btu/lbm * 36.8 klb/hr ]

Step 2: Determine the Header Specific Enthalpy

The header specific enthalpy can be calculated by dividing the Total Inlet Energy Flows by the Total Inlet Mass Flows:

  • Total Inlet Energy Flow = 13.9 MMBtu/hr = 1.1 MMBtu/hr + 0.1 MMBtu/hr + 10.2 MMBtu/hr + 2.5 MMBtu/hr
  • Total Inlet Mass Flow = 169.0 klb/hr = 93.3 klb/hr + 3.0 klb/hr + 35.9 klb/hr + 36.8 klb/hr
  • Header Specific Enthalpy = Total Energy Flow / Total Mass Flow
    Header Specific Enthalpy = 82.3 btu/lbm = 13.9 MMBtu/hr / 169.0 klb/hr ]

Step 3: Determine Header Properties

Using the Steam Property Calculator, properties are determined using Header Pressure and the Header Specific Enthalpy:

  • Pressure = 224.4 psig
  • Specific Enthalpy = 82.3 btu/lbm
  • [Steam Property Calculator] => Temperature = 113.6 °F

Assumptions

  • Inlet Mass Flows equal Outlet Mass Flow.
  • Inlet Energy Flows equal Outlet Energy Flow.
  • The combined inlet pressures are adjusted to match the header pressure without energy loss or gain.

Akses link:

Harga steam headr,

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