Fan Engineering — Fan Air Power & Input
Fan Air Power & Input for mine and tunnel fan systems.
Q times p is the whole economics of mine ventilation in one multiplication — a main fan at 120 m³/s and 1.8 kPa draws ~300 kW around the clock, a megawatt-hour every three hours, forever. Every pascal of avoidable resistance upstream is purchased monthly at this meter.
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.
Fan Air Power & Input for mine and tunnel fan systems. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Fan Engineering — Fan Air Power & Input
Fan Engineering — Fan Air Power & Input computes the governing relationship P_air = Q·p · P_in = Q·p/(η_fan·η_motor) live as you type. Q times p is the whole economics of mine ventilation in one multiplication — a main fan at 120 m³/s and 1.8 kPa draws ~300 kW around the clock, a megawatt-hour every three hours, forever. Every pascal of avoidable resistance upstream is purchased monthly at this meter. 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 Fan Engineering — Fan Air Power & Input
- 1Enter your values — Quantity, Fan total pressure, Fan total efficiency, Motor + drive efficiency (sensible defaults are pre-filled).
- 2Read the live results: Air power, Electrical input.
- 3Check the "with your numbers" line to see P_air = Q·p · P_in = Q·p/(η_fan·η_motor) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Fan Engineering — Fan Air Power & Input?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula P_air = Q·p · P_in = Q·p/(η_fan·η_motor) 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.)
- ✓Q times p is the whole economics of mine ventilation in one multiplication — a main fan at 120 m³/s and 1.8 kPa draws ~300 kW around the clock, a megawatt-hour every three hours, forever.
- ✓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 fan engineering — fan air power & input use?+
It evaluates P_air = Q·p · P_in = Q·p/(η_fan·η_motor), 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?+
Q times p is the whole economics of mine ventilation in one multiplication — a main fan at 120 m³/s and 1.8 kPa draws ~300 kW around the clock, a megawatt-hour every three hours, forever. 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?+
Fan Air Power & Input for mine and tunnel fan systems. A free mine ventilation & air quality tool. Every pascal of avoidable resistance upstream is purchased monthly at this meter. 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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