Ducting Calculation | MEAM Web Tools

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Live reference

Process Overview

Phase 4

Reference system 230 magnetrons

System power 300 kW

Cavity target -20 Pa

Outlet limit 50 degrees C

Editable Defaults

Ambient temperature degrees C Outlet temperature limit degrees C Target cavity pressure Pa Air density kg/m3 Air heat capacity kJ/kgK Airflow tolerance band % Outlet fan power default W/fan

Process Fan Data

Chosen fan

Magnetron Cooling Core

Phase 4

Number of magnetrons pcs Fans per magnetron pcs Total system power kW Total heat load to cooling air kW Calculation mode Target airflow per magnetron m3/h

Required total magnetron airflow 0 m3/h

Required airflow per magnetron 0 m3/h

Heat load per magnetron (calculated) 0 kW

Total magnetron fan power 0 kW

Calculated outlet air temperature 20 degrees C

Required airflow per magnetron 0 m3/h

Measured min m3/h Measured max m3/h Restricted flow m3/h Freeflow rating m3/h Power per fan W Restriction loss Pa Filter holes pcs Hole width mm Hole height mm

Push Inlets

Phase 5

Number of push inlets pcs Fan data flow @ ref P m3/h Fan data power @ ref P W/fan Fan data pressure Pa Inlet temperature degrees C Inlet rel humidity % DeltaP after inlets Pa

Total required flow * 0 m3/h

Needed flow per inlet * 0 m3/h

Indicative inlet VFD setting * 0 Hz

Delta flow inlets-magnetrons * 0 m3/h

Total push fan power indicative * 0 kW

Pressure after inlets -5 Pa

Inlet temperature 20 degrees C

Inlet rel humidity 80%

Cavity Balance

Phase 6

Wanted cavity pressure Pa Cavity length m Cavity width m Cavity height m Magnetron air open L m Magnetron air open W m Max opening velocity m/s

Serial cavity airflow 0 m3/h

Magnetron airflow 0 m3/h

Cavity volume 0 m3

Target cavity pressure -20 Pa

Opening area / required 0 / 0 m2

Opening velocity 0 m/s

Results And Warnings

Live cooling

Access Pending

Magnetron outlet Not calculated

Cavity pressure Not calculated

Push inlets Not calculated

Extraction balance Not calculated

Magnetron cooling is calculated from editable heat load, airflow, ambient temperature, and outlet temperature limit.

Push required flow * 0 m3/h

Magnetron airflow 0 m3/h

Serial cavity airflow 0 m3/h

Extraction wet airflow * 0 m3/h

Extraction margin * 0 m3/h

Magnetron outlet temp 0 degrees C

Cavity pressure target 0 Pa

Overall status Not calculated

* Italic values are estimates. Real fan speed is controlled by PLC PID targeting approximately -2 to -10 Pa.

Extraction Control

Phase 7

Extraction fans pcs Fan data flow @ ref P m3/h Fan data power @ ref P W/fan Cavity abs pressure Pa Recovery deltaP Pa Fan grouping Control mode Extraction temperature degrees C Absolute moisture g/kg Ambient pressure Pa Control margin %

Dry-air target * 0 m3/h

Calculated relative humidity * 0%

Humid-air volume factor * 0x

Cavity pressure lift * 0 Pa

Recovery deltaP * 0 Pa

DeltaP over fans * 0 Pa

Corrected wet-air volume * 0 m3/h

Required wet flow per fan * 0 m3/h

50 Hz fan capacity * 0 m3/h

Indicative extraction VFD * 0 Hz

Indicative fan power * 0 kW

50 Hz capacity margin * 0 m3/h

Heat Exchanger Control (Phase 9b)

Cross-flow

Candidate name Outside air temperature degrees C Outside air RH % Dry outlet target degrees C HX effectiveness 0-1 Overall U-value W/m2K Wet face velocity m/s Dry face velocity m/s Candidate width m Candidate height m Active area factor 0-1 Bypass flow % RICH recovered heat kW RICH LMTD degrees C Hot outside warning degrees C Hot outside fail degrees C

Dry outlet predicted 0 degrees C

Wet outlet predicted 0 degrees C

Condensate flow * 0 kg/h

Recovered heat * 0 kW

Required thermal surface * 0 m2

Required wet-side face area * 0 m2

Required dry-side face area * 0 m2

Candidate gross face area * 0 m2

Candidate effective area * 0 m2

Wet face velocity on candidate * 0 m/s

Dry face velocity on candidate * 0 m/s

Candidate wet area margin * 0 m2

Candidate dry area margin * 0 m2

Candidate name * -

Candidate section status * Unknown

RICH implied UA * 0 kW/K

RICH-implied U-value * 0 W/m2K

Recommended line speed * 0%

Duct Tree (Phase 10 Start)

Expandable

Push connections (top) 0 roots

Total push length * 0 m

Extraction connections (bottom) 0 roots

Total extraction length * 0 m