Deaerator Calculator watch tutorial view guide
Determines the required water and steam flows for a required feedwater mass flow.
Allowed Range / Limits | |
---|---|
Minimum | |
Maximum | |
Examples: | Mouse Over |
---|---|
Random |
Calculation Details and Assumptions below
Calculation Details
Step 1: Determine Inlet Water Properties
Using the Steam Property Calculator, properties are determined using Inlet Water Pressure and the selected second parameter (Temperature, Specific Enthalpy, Specific Entropy, or Quality):Step 2: Determine Inlet Steam Properties
Using the Steam Property Calculator, properties are determined using Inlet Steam Pressure and the selected second parameter (Temperature, Specific Enthalpy, Specific Entropy, or Quality):Step 3: Determine Feedwater and Vented Steam Properties
Step 4: Determine Feedwater and Vented Mass Flows and Total Outlet Energy Flows
- Vented Steam Mass Flow = Vent Rate * Feedwater Mass Flow
- Total DA Mass Flow = Vented Steam Mass Flow + Feedwater Mass Flow
- Total Outlet Energy Flow = [Feedwater Specific Enthalpy * Feedwater Mass Flow] + [Vented Steam Specific Enthalpy * Vented Steam Mass Flow]
Step 5: Determine Inlet Water and Steam Mass Flows
The inlet mass flows are determine based on an energy and mass flow balance:- Minimum Inlet Energy Flow = Inlet Water Specific Enthalpy * Total DA Mass Flow
- Additional Energy Flow Needed = Total Outlet Energy Flow - Minimum Inlet Energy Flow
- Inlet Steam Mass Flow = Additional Energy Flow Needed / ( Inlet Steam Specific Enthalpy - Inlet Water Specific Enthalpy )
- Inlet Water Mass Flow = Total DA Mass Flow - Inlet Water Mass Flow
Assumptions
- The Deaerator (DA) Vent Rate is a percent of feedwater flow.
- The feedwater leaves the DA as a saturated liquid at DA pressure.
- The DA vented gases are assumed to be saturated gas at DA pressure.
- The DA has no additional heat or masses losses.