Plumbing Steam Boiler Feedwater Rate Calculator
Reconcile actual boiler steam/blowdown/returned condensate mass ledger, separating gross feedwater and external makeup; no pump volumetric flow or boiler operating instructions.
Description
Boiler feedwater balances steam production, blowdown and returned condensate.
Boiler feedwater balances steam production, blowdown and returned condensate. Returned fraction applies to steam production rather than total feedwater.1
The returned values include Required gross boiler feedwater kg hour, Required makeup water kg hour, Modeled returned condensate kg hour. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Steam Boiler Feedwater Rate Calculator
Use Plumbing Steam Boiler Feedwater Rate Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No boiler efficiency, dissolved-solids chemistry or feed-pump head is inferred.
Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
How to use Plumbing Steam Boiler Feedwater Rate Calculator and understand its results
- Prepare measured flows, pressures, temperatures or inventories with consistent units. For catalog tools, use independently verified capacities at the stated operating conditions and supply the explicit design demand.
- Enter observedSteamDemandKgHour, observedContinuousBlowdownKgHour, callerReturnedCondensateFraction using the field table and calculation rules, then run the tool.
- Read requiredGrossBoilerFeedwaterKgHour, requiredMakeupWaterKgHour, modeledReturnedCondensateKgHour. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| observedSteamDemandKgHour | Observed steam demand kg hour | number | Required |
| observedContinuousBlowdownKgHour | Observed continuous blowdown kg hour | number | Required |
| callerReturnedCondensateFraction | Caller returned condensate fraction | number | Required |
Enter nonnegative steam and blowdown rates plus returned fraction 0–1. Return gross feedwater, condensate return and makeup rates.
gross=steam+blowdown; return=steam×returnedFraction; makeup=gross−return Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| requiredGrossBoilerFeedwaterKgHour | Required gross boiler feedwater kg hour | number |
| requiredMakeupWaterKgHour | Required makeup water kg hour | number |
| modeledReturnedCondensateKgHour | Modeled returned condensate kg hour | number |
{
"input": {
"observedSteamDemandKgHour": 100,
"observedContinuousBlowdownKgHour": 5,
"callerReturnedCondensateFraction": 0.6
},
"output": {
"requiredGrossBoilerFeedwaterKgHour": 105,
"requiredMakeupWaterKgHour": 45,
"modeledReturnedCondensateKgHour": 60
}
}Limitations and assumptions
No boiler efficiency, dissolved-solids chemistry or feed-pump head is inferred.
Numeric inputs, where present, must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Plumbing Steam Boiler Blowdown Rate Calculator: Steady boiler blowdown can balance dissolved solids when steam carries negligible solids. The allowed boiler concentration must exceed feed concentration. For a complementary task, use Plumbing Steam Condensate Return Pump Head Calculator: Condensate-return head combines signed elevation, friction and absolute-pressure difference. A favorable pressure difference can reduce the required head.
References
Similar or alternative tools
- Plumbing Steam Boiler Blowdown Rate Calculator
Steady boiler blowdown can balance dissolved solids when steam carries negligible solids. The allowed boiler concentration must exceed feed concentration.
- Plumbing Steam Condensate Return Pump Head Calculator
Condensate-return head combines signed elevation, friction and absolute-pressure difference. A favorable pressure difference can reduce the required head.