# Header Calculator watch tutorialview guide

### Calculates the combined steam properties of multiple steam inlets.

Number of Inlets 2 3 4 5 6 7 8 9

### Inlet 1

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 2

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 3

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 4

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 5

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 6

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 7

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 8

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr

### Inlet 9

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr
* Required
Allowed Range / Limits
Minimum
Maximum
Examples: Mouse Over Random Inlets

## 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:

### 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:

### Step 3: Determine Header Properties

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

## 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.