Covid19 virus: the disinfectant mask by thermal viral inhibition (+ UVc?)?

[Christophe]

I post my analyzes as soon as I have compiled this in a spreadsheet!

Voila, I got a bit of a headache what I have left of neurons have heated a little ....

But I managed to plot these coronavirus inhibition curves from the data in this table!

Whoever understands the legend at first reading will have all my respect!

Inhibition_Coronavirus_temperature.png (61.09 KiB) Viewed 2989 times

If we take the equations of the trend curves (blue curve):

- at 90 ° C a log reduction of 8,46 / min is obtained
- at 120 ° C a log reduction of 16,89 / min is obtained
- at 150 ° C a log reduction of 27,68 / min is obtained

I remind you that the ANSES considers that there is disinfection acceptable within 4 LOG scale from this document: health-pollution-prevention / virus-covid19-the-mask-thermal-disinfectant-t16392-10.html # p389306

A few seconds at 120 ° C should, following this approach, be sufficient to disinfect the air of the coronavirus!

If you want the spreadsheet I can share it too! It will help you understand the legend!

[Christophe]

I am amazed to have no reaction ...

To obtain the inhibition per second it is necessary to remove log from 60 or 1.778 log to the 3 digits calculated ...

- at 90 ° C a log reduction of 6,68 / second is obtained
- at 120 ° C a log reduction of 15,11 / second is obtained
- at 150 ° C a log reduction of 25,91 / second is obtained

A fraction of a second would therefore be sufficient to inhibit 4 log at 90 ° C ... and one fraction of an fraction at 120 ° C and one fraction of an fraction of an fraction at 150 ° C!

But it is better to take some security ... 2 to 3 seconds of heating to 120 ° C and that's it !!

[Macro]

Yeah ... But hey ... We are already not able to buy a poor ffp2 ... So find the necessary to tinker something like that ...

[Christophe]

Well, a respirator manufacturer is moving to put some engineers on it !!

Well, I'm going to try a prototype ... What I miss is the heating resistance ...

Any idea where I could find one with such a low power in 12-15 V ???

I would like to leave on about 50W regulated in TOR ...

[Macro]

What do you want as resistance power?

Sorry I hadn't read everything ... Well it's very simple ... you make yourself a reheater wound with enamelled motor winding wire ... for 50 w ... the best would be to find 0.4mm ... I have 0.8 but we will have to do something with 40m of wire ... Note it increases the exchange area ...

[Christophe]

Hey Macro, is the corona going to your head? I just said it: 50W

Haven't you read the calculations above? It takes 22W theoretically for an adult man ... So no security I take 50W with an all or nothing regu ...

Well it didn't take long to find it !!

Aluminum housing 12V / 24V Heating plate thermistors with constant temperature heating plate PTC Heating.
As a responsible seller, we promise that the 100% pre-shipment test will guarantee a perfect product. 100% refund / New replacement, Worry-free warranty. If you have any problems with the product, please feel free to contact us by email and quality assurance. Do not hesitate to order the RIPPLE PTC HEATING. In the event of a defect or a quality problem with our product, we provide a friendly and lasting after-sales service. Thank you sincerely for your navigation and your support!


Specification:
Power: 70W; 150W (optional)
Voltage: 12V; 24V (optional)
Heating equipment: PTC thermistors
Heating mode: Heat in the air or direct contact with an object
Product dimension: 74 * 22mm / 2.9 * 0.9in (wavy length: 54mm)
Heating object: solid and gas
Weight: 42g / 1.5oz

This one seems a little better finished but is not available on premium:

This item is safe to use with surface insulation. It adopts high temperature wire as the main wire, durable and good performance. With mounting holes, it is easy to install and has a long service life of 3 years. It is capable of heating solids and gases, very practical. Applicable to air conditioners, air curtain, dryer, dryer and cars. Worth buying.

Specification:
Condition: 100% brand new
Voltage: DC 12V
Power: 200W
Product size: approx. 120 * 50 * 26mm / 4,7 * 2,0 * 1,0 inch
Product weight: approx. 123g

Package Included:
1 PTC heating heater

And from 3:

PTC ceramic heating element and aluminum tube, low thermal resistance, high heat transfer efficiency. This product is an electric heater with automatic constant temperature and energy saving.

This PTC ceramic air heater has the feature of automatic energy saving. Easy to install and maintain, superior performance. Application: air conditioner, electric heater, dryer, humidifier, etc.


Specification:
Material: Aluminum
Weight: 47g / 1,7oz
Power: 50W
Voltage: AC / DC 12V
Surface temperature: 200 ± 10 ℃
Size: 95 * 31 * 25mm / 3.7 * 1.2 * 1inch

List of packages:
1 x PTC ceramic air heater

Go on hop I order the last one which seems perfect for entering a 1 inch or 1 1/4 inch PVC pipe!

With a 5 to 10W UV tube for pools !!

A few pipes, a few pieces of PVC and mine FORTUNE: € 150 cost price, € 15 the sale price! What? Isn't that how we charge for medical equipment?

[Christophe]

What do you want as resistance power?

Sorry I hadn't read everything ... Well it's very simple ... you make yourself a reheater wound with enamelled motor winding wire ... for 50 w ... the best would be to find 0.4mm ... I have 0.8 but we will have to do something with 40m of wire ... Note it increases the exchange area ...

Sorry too, I wrote my message when you edited yours ...

A little reminder of the formula please?

Because if I can go from 150 € to 130 € it will further boost my coef. ignoble commercial !!

[Macro]

You will never be able to heat air to 70 ° with a flow sufficient to make a person breathe with only 50W..To heat oil at the same temperature I had internal coil heaters immersed in more than 300W ... And with a cycling flow rate of 45L / hour plus 6lh additional for consumption .... it took 10 minutes to go up to 70 with a starting temperature of 15 ° ... And then stabilized ca heated 1/3 of the time ...

[Macro]

Calculation instructions

http://www.h2osmose.com/ecogwada/fritte ... alculs.htm

[Christophe]

Reread the calculations above ... because 50W is already greatly increased !!

4th message of the 1st page: health-pollution-prevention / virus-covid19-the-thermal-disinfectant-mask-t16392.html

We are on flow rates of 0,2 g of air per second Macro !! It's air, it's not oil and even less water!