Plumbing Steam Boiler Blowdown Rate Calculator
Solve ideal steady dissolved-solids steam/feed/blowdown balance assuming no steam solids, explicit caller maximum; not a boiler-control procedure or chemistry/pressure approval.
Description
Steady boiler blowdown can balance dissolved solids when steam carries negligible solids.
Steady boiler blowdown can balance dissolved solids when steam carries negligible solids. The allowed boiler concentration must exceed feed concentration.1
The returned values include Modeled continuous blowdown kg hour, Modeled gross feedwater kg hour. The How section below explains the calculation, input rules and interpretation.
When to use Plumbing Steam Boiler Blowdown Rate Calculator
Use Plumbing Steam Boiler Blowdown Rate Calculator when you need to evaluate the supplied records under the calculation and evidence rules below. No carryover, transient chemistry, treatment recommendation or automatic boiler control is supplied.
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 Blowdown 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 observedSteamOutputKgHour, observedFeedTdsMgKg, callerMaximumBoilerTdsMgKg using the field table and calculation rules, then run the tool.
- Read modeledContinuousBlowdownKgHour, modeledGrossFeedwaterKgHour. 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 |
|---|---|---|---|
| observedSteamOutputKgHour | Observed steam output kg hour | number | Required |
| observedFeedTdsMgKg | Observed feed tds mg kg | number | Required |
| callerMaximumBoilerTdsMgKg | Caller maximum boiler tds mg kg | number | Required |
Enter nonnegative steam rate and feed TDS plus positive boiler TDS limit strictly above feed TDS. Return blowdown and total feedwater rates.
blowdown=steam×feedTDS/(boilerLimit−feedTDS); feedwater=steam+blowdown Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| modeledContinuousBlowdownKgHour | Modeled continuous blowdown kg hour | number |
| modeledGrossFeedwaterKgHour | Modeled gross feedwater kg hour | number |
{
"input": {
"observedSteamOutputKgHour": 100,
"observedFeedTdsMgKg": 10,
"callerMaximumBoilerTdsMgKg": 100
},
"output": {
"modeledContinuousBlowdownKgHour": 11.11111111111111,
"modeledGrossFeedwaterKgHour": 111.11111111111111
}
}Limitations and assumptions
No carryover, transient chemistry, treatment recommendation or automatic boiler control is supplied.
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 Feedwater Rate Calculator: Boiler feedwater balances steam production, blowdown and returned condensate. Returned fraction applies to steam production rather than total feedwater. For a complementary task, use Plumbing Water Hardness As Caco3 Calculator: Hardness expressed as CaCO3 converts ion concentrations using equivalent weights. Consistent equivalent weights distinguish this from summing raw ion masses.
References
Similar or alternative tools
- Plumbing Steam Boiler Feedwater Rate Calculator
Boiler feedwater balances steam production, blowdown and returned condensate. Returned fraction applies to steam production rather than total feedwater.
- Plumbing Water Hardness As Caco3 Calculator
Hardness expressed as CaCO3 converts ion concentrations using equivalent weights. Consistent equivalent weights distinguish this from summing raw ion masses.