Mine Climate — Air Cooling Power (M-Scale)
Air Cooling Power (M-Scale) for deep and hot mine planning.
Cooling power marries temperature and velocity into the number that matters: what the air can take OFF a working body. Its lever is velocity's square root — doubling airspeed at the face raises cooling ~40%, which is why a repositioned duct outlet sometimes beats a chiller upgrade.
Formula
Note: Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
Air Cooling Power (M-Scale) for deep and hot mine planning. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Mine Climate — Air Cooling Power (M-Scale)
Mine Climate — Air Cooling Power (M-Scale) computes the governing relationship ACP ≈ (33 − T_wb)(8 + 12√v) [simplified M-scale form] live as you type. Cooling power marries temperature and velocity into the number that matters: what the air can take OFF a working body. Its lever is velocity's square root — doubling airspeed at the face raises cooling ~40%, which is why a repositioned duct outlet sometimes beats a chiller upgrade. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Mine Climate — Air Cooling Power (M-Scale)
- 1Enter your values — Air velocity over worker, Wet-bulb temperature (sensible defaults are pre-filled).
- 2Read the live results: Cooling power (approx.).
- 3Check the "with your numbers" line to see ACP ≈ (33 − T_wb)(8 + 12√v) [simplified M-scale form] substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Mine Climate — Air Cooling Power (M-Scale)?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula ACP ≈ (33 − T_wb)(8 + 12√v) [simplified M-scale form] with authoritative sources cited on the page (McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.)
- ✓Cooling power marries temperature and velocity into the number that matters: what the air can take OFF a working body.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the mine climate — air cooling power (m-scale) use?+
It evaluates ACP ≈ (33 − T_wb)(8 + 12√v) [simplified M-scale form], exactly as published. Sources: McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
Cooling power marries temperature and velocity into the number that matters: what the air can take OFF a working body. Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
When is this calculator the right tool for the job?+
Air Cooling Power (M-Scale) for deep and hot mine planning. A free mine ventilation & air quality tool. Its lever is velocity's square root — doubling airspeed at the face raises cooling ~40%, which is why a repositioned duct outlet sometimes beats a chiller upgrade. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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