 # Heat Loss Calculator watch tutorialview guide

### Inlet

Pressure* psig
* °C btu/lbm kJ/kg/K
Mass Flow * klb/hr
Percent Heat Loss * %
* Required
Allowed Range / Limits
Minimum
Maximum
 Examples: Mouse Over Any Liquid Gas

## Calculation Details

### Step 1: Determine Inlet Properties

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:
• Inlet Energy Flow = Specific Enthalpy * Mass Flow

### Step 2: Determine Outlet Energy Flow after Heat Loss

• Outlet Energy Flow = Inlet Energy Flow * ( 1 - Heat Loss (%) )

### Step 3: Determine Outlet Properties

The outlet specific enthalpy is determined from energy and mass flows:
1. Outlet Mass Flow = Inlet Mass Flow
2. Outlet Energy Flow = Outlet Mass Flow * Outlet Specific Enthalpy
3. Outlet Specific Enthalpy = Outlet Energy Flow / Inlet Mass Flow
Using the Steam Property Calculator, properties are determined using Pressure and Specific Enthalpy:

## Assumptions

• Inlet Mass Flow equals Outlet Mass Flow.
• Baseline (0 Energy Flow) is set at the triple point for water.
• % Heat Loss is relative to the Baseline.