Covid Aerosol Flow Model

Description

Good ventilation is a proven approach for reducing airborne transmission of pathogens. Recirculating indoor door has been the cause of many super-spreader events. Indoor air quality can be improved by either increasing intake of fresh air or by filtering it. This software focuses on airborne transmission of Covid-19 due to movement of aerosolized particles. It is based on analytical formulation of aerosol balance & flow balance in ventilated indoor spaces. Occupants can compare the options to reduce the aerosol concentration in their living spaces by either increasing fresh air ventilation or by adding HEPA based air purifiers.

About Software

The software focuses on airborne transmission of Covid-19 due to movement of aerosolized particles. It is based on analytical formulation of aerosol balance & flow balance in ventilated indoor spaces. Occupants can explore ways to reduce the aerosol concentration in their living spaces by either increasing fresh air ventilation or by adding Air Purifiers.

Note

The tool assumes that:

Temperature change from Air Conditioning is 10°C and it's effeciency is 65%.
It is assumed that each infected person exhales aerosol at the rate of 1mg/min.
Electricity cost is Rs. 5 per kWh

Existing System and Clean Air Target

Room DimensionsLength of the Room (Ft.)
Width of the Room (Ft.)
Floor Area (Sq.Ft.)
Height of the Room (Ft.)
Volume of the Room (Cubic Ft.)

Existing Ventilation SystemAir changes per hour

Note: if you are not sure, use 1

Percentage of fresh air

Note: if you are not sure, use 5

Number of Occupants
Probable Percentage of Occupants Contagious
Air Purifier Power Consumption (W)
Clean Air Delivery Rate (CFM)
Purchase Price of Air Purifier (FIXED Rs.)
No. of hours per day in use

Aerosol ConcentrationTarget Reduction in Aerosol Concentration (%)

Note: % reduction is relative to existing concentration levels

Results

Current Estimated Aerosol ConcentrationAerosol Generation (mg/min)
Mean Aerosol Concentration (ug/cu.ft)

Your Potential Solutions to reach your target of a safe indoor space

Solution One

Increase fresh air(make-up air) in the current system, this would require% of fresh air ventilation, which is an increase of% from the current system.

Increased power consumption for this solution isW

Solution Two

Install Air Purifier Units

Number of units required to reach safe indoor space

Power Consumption of Air Purifier (W)

Power saving by using Air Purifiers is%, which equalsKWh per month, which equalsRs. per month.

Total cost of increasing fresh air by Air Purifier isRs.

Time to recover Air Purifier purchase priceMonths