Heat Removal Ventilation
Balance sensible heat against air heat capacity and caller permitted rise; latent heat, humidity and worker heat-stress criteria are excluded.
Description
Sensible heat removal relates captured heat to air mass flow, heat capacity and permitted temperature rise.
Sensible heat removal relates captured heat to air mass flow, heat capacity and permitted temperature rise. Heat not captured by the airflow does not enter this calculation.
The tool returns requiredAirQuantityM3PerSecond (required air quantity m3 per second). Input measurements and model parameters are supplied by the caller; the tool computes the stated summary rather than acquiring those measurements.
When to use Heat Removal Ventilation
Use Heat Removal Ventilation when you already have sensibleHeatKw, airDensityKgPerM3, airSpecificHeatKjPerKgK, permittedTemperatureRiseK, heatCaptureFraction and want requiredAirQuantityM3PerSecond. This is useful for checking a supplied calculation, documenting a measurement convention, or comparing observations prepared on the same basis.
How to use Heat Removal Ventilation and understand its results
- Enter sensibleHeatKw, airDensityKgPerM3, airSpecificHeatKjPerKgK, permittedTemperatureRiseK, heatCaptureFraction using the field table below. Match the units, ordering and data boundaries described in the calculation.
- Run the tool after checking the stated bounds and matching paired observations or categories. A malformed request gives a tool error rather than a usable measurement.
- Read requiredAirQuantityM3PerSecond. Use the calculation and interpretation below to distinguish amounts, ratios, signs and decision flags where applicable.
- Review the supplied parameters and assumptions before using the result in a report or comparing it with another observation.
| Input field | Meaning | Value type and bounds | Requirement |
|---|---|---|---|
| sensibleHeatKw | Sensible heat kw | number | Required |
| airDensityKgPerM3 | Air density kg per m3 | number | Required |
| airSpecificHeatKjPerKgK | Air specific heat kj per kg k | number | Required |
| permittedTemperatureRiseK | Permitted temperature rise k | number | Required |
| heatCaptureFraction | Heat capture fraction | number | Required |
Use nonnegative heat, capture fraction in [0,1] and positive density, heat capacity and rise.
Q[m³/s] = heatKw×captureFraction/(densityKg/m³×specificHeatKJ/kgK×riseK) The symbols refer to the supplied quantities or generated values described above; unit conversions and comparison boundaries follow the stated implementation.
{
"input": {
"sensibleHeatKw": 120,
"airDensityKgPerM3": 1.2,
"airSpecificHeatKjPerKgK": 1,
"permittedTemperatureRiseK": 5,
"heatCaptureFraction": 0.5
},
"output": {
"requiredAirQuantityM3PerSecond": 10
}
}Limitations and assumptions
Latent heat, humidity, rock heat transfer and distributed ventilation are excluded. The permitted rise is supplied externally.
Numerical inputs must be finite. The tool checks its declared input shape and calculation constraints; those checks do not verify the quality, calibration or representativeness of the supplied observations.
Alternative or Complementary methods
Ventilation Air Quantity: Screen fully mixed steady dilution against supplied concentrations; shared contaminant constraints use maximum flow, not a sum, and do not certify mine safety. Ventilation Pressure Drop: Sum series Atkinson resistances in Pa/(m³/s)² and compute pressure drop/air power; parallel networks and fans are not solved.
Methodological background: Introduction to Mine Ventilating Principles and Practices.1
References
-
Introduction to Mine Ventilating Principles and Practices — U.S. Bureau of Mines, Bulletin 589
Similar or alternative tools
- Ventilation Air Quantity
Screen fully mixed steady dilution against supplied concentrations; shared contaminant constraints use maximum flow, not a sum, and do not certify mine safety.
- Ventilation Pressure Drop
Sum series Atkinson resistances in Pa/(m³/s)² and compute pressure drop/air power; parallel networks and fans are not solved.