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

published: 02/04/20, 21:56
by Christophe
The Covid19 virus like all Coronaviruses is THERMOLABILE: it does not survive above 70 ° C for a few seconds ... it is a proven fact!

So why not disinfect the air in the Covid19 with non-filtering but thermal masks which will heat the air> 70 ° C rather than filter it !! ??

We can, of course, do both: filtration THEN heating!
?


It would suffice to thermally disinfect the air, let's say at 90-100 ° C for a few seconds? !

Addition: read this thesis Doctorate on viral inactivation by physical methods by Swan Firquet

(thanks Padawan: health-pollution-prevention / virus-covid19-the-mask-thermal-disinfectant-t16392-60.html # p389870)

This graph is shown on page 77:

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It therefore takes just 1 second at 110 ° C to inhibit the H1N1 virus by a log factor of 4!

Edit 0: the calculations below allow to estimate log order reduction 7 to 90 ° C in just 1 second.
See: health-pollution-prevention / virus-covid19-the-thermal-disinfectant-mask-t16392-30.html

But putting a mini inter-cooler to lower the temperature is not a major technical problem ...

Thermal level: a gas camping gas cylinder would certainly suffice for more than a few hours of breathing, or much more !!

I'm going to do some table corner calculations.

Edit: they are done, see below, it takes less than 30W to heat the air of an adult at rest! So we can use a battery!

Basing yourself on a snorkeling mask is a possibility, it turns out that I have 1, I also have pipes, batteries and PC fans ... I just need to find the heating element and the regulation and I can make a prototype!

snorkeling.jpg
snorkeling.jpg (42.01 KB) Viewed 5552 times




Edit2: as suggested here we can make a UV disinfection mask too! No doubt less energy-consuming, but disinfection does not prevent the other!

ps: this subject can precede a possible patent ... for those to whom it would cross the mind ... : Cheesy:

Add: IMPORTANT the COVID19 thermal inhibition curves

Sources and methods below in this topic. They are based on the measurements from this study: https://www.medrxiv.org/content/10.1101 ... l.pdf+html ou download / file.php? id = 13626 ou health-pollution-prevention / freeze-or-burn-the-covid-19-t16358-30.html # p388475

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Re: Covid19 Virus: the thermal disinfectant mask!

published: 02/04/20, 22:00
by Paul72
it's April 2, the fish was yesterday ... : Mrgreen:

Good night

Re: Covid19 Virus: the thermal disinfectant mask!

published: 02/04/20, 22:20
by phil12
Paul72 wrote:it's April 2, the fish was yesterday ... : Mrgreen:

Good night


We have napalm!

Re: Covid19 Virus: the thermal disinfectant mask!

published: 02/04/20, 23:13
by Christophe
Bunch of funny ... : Cheesy:

Re: Covid19 Virus: the thermal disinfectant mask!

published: 03/04/20, 13:40
by Christophe
So what power does it take to heat respiratory air by 100 ° C?

The answer is simple:

Thermal power = mass capacity of air * the maximum mass flow of an adult man.

Women and children have a lower volume.

It is therefore an increased table corner calculation!

sources:
http://www.ilocis.org/fr/documents/ilo010.htm
https://www.canada.ca/content/dam/hc-sc ... at-fra.pdf
respirat-eng.pdf
(634.26 KB) Downloaded times 1147

And a PhD from Polytechnique:
https://pastel.archives-ouvertes.fr/pas ... 6/document

manuscript1.pdf
(8.56 million) Downloaded times 170


launois_rollinat_sandrine_p03.pdf
(1.5 million) Downloaded times 253


a) The respiratory volume, greatly increased, of an adult man is 8 L

At rest it is closer to 1 L ...

Screenshot_2020-04-03 Dynamics of oxygen transport and transfer within the pulmonary acinus - document.png
Screenshot_2020-04-03 Dynamics of oxygen transport and transfer within the pulmonary acinus - document.png (84.82 KB) Consulted 5594 times


b) The respiratory rate varies greatly according to age - and obviously the activity

At rest we have our values:

Screenshot_2020-04-03 respirat-eng pdf.png
Screenshot_2020-04-03 respirat-fra pdf.png (18.18 KiB) Viewed 5594 times


So 20 * 8 = 160 L per minute in reality is necessarily less ... much less:

https://eurekasante.vidal.fr/sport/corp ... sport.html

During the effort, the volume of air circulated by the lungs goes from around 6 to 8 liters per minute at rest to 80 to 150 liters per minute, depending on the intensity of the exercise. In very high level athletes, this volume can even reach 250 liters per minute. At the same time, many pulmonary capillaries expand to increase the flow of blood through the lungs. This adaptation allows to take and fix more oxygen on the hemoglobin of red blood cells.


A high level sportsman is 250 L per minute: https://eurekasante.vidal.fr/sport/corp ... sport.html

So I retain 100L per minute ... it's 10 times more than necessary at rest!

c) 100 L per minute is roughly 130 g of air per minute for air entering at 0 ° C.

Either a flow of 2.2 g / s in "effort" mode
Or a flow rate of 0.22 g / s in "rest" mode

d) The thermal mass capacity of the air is approximately 1004 J / kg.K

It therefore requires a power of 2.2 / 1000 * 1004 * 100 = 220 W in sport mode and only 10 times less at rest, i.e. 22 W

22 W is nothing at all the use of an electric battery is possible!

Lipo batteries are 200W per kg ... a single kg of battery would therefore last 1 hour in sport mode and 1 hours at rest!

We can therefore consider a machine weighing a few kg ...

These powers are voluntarily increased! But you will have to add some accessories like fans ... we will be below 30W in any case! 8) 8) 8)

So who wants to finance manufacturing?

Re: Covid19 Virus: the thermal disinfectant mask!

published: 03/04/20, 13:46
by Macro
And you also need an exchanger to cool this air before blowing it into the guy's lungs ... Because in my opinion with air heated to more than 70 ° .... The lungs should not last long ...

Re: Covid19 Virus: the thermal disinfectant mask!

published: 03/04/20, 13:57
by Christophe
Macro wrote:And you also need an exchanger to cool this air before blowing it into the guy's lungs ... Because in my opinion with air heated to more than 70 ° .... The lungs should not last long ...


Yes and I said it: a small intercooler would be enough (or simply a long enough grooved pipe) ... the flow was very low, the air will have plenty of time to cool naturally in a 1 to 2 m pipe!

Do not forget that you can breathe air very well at 60, 70 ° C, 90 ° C ... in the sauna!

And you can put it in your hand in an oven at 300 ° C ... as long as you don't touch the walls! : Cheesy:

By cons we burn from 45 ° C in water ...

Re: Covid19 Virus: the thermal disinfectant mask!

published: 03/04/20, 14:03
by GuyGadebois
Macro wrote:And you also need an exchanger to cool this air before blowing it into the guy's lungs ... Because in my opinion with air heated to more than 70 ° .... The lungs should not last long ...

Bof, when you know the Finnish sauna ...

Re: Covid19 Virus: the thermal disinfectant mask!

published: 03/04/20, 14:03
by Paul72
Simple and clear answer: the air flow is too fast to see the viruses destroyed, even at 100 degrees celsius.
A cartridge or Hepa filter is more effective. Finally if we can say.

Re: Covid19 Virus: the thermal disinfectant mask!

published: 03/04/20, 14:08
by Christophe
Paul72 wrote:Simple and clear answer: the air flow is too fast to see the viruses destroyed, even at 100 degrees celsius.
A cartridge or Hepa filter is more effective. Finally if we can say.


Ah yes? 0.2 g / s is it fast? It all depends on the section / surface of the heater ... Before concluding too quickly and when we don't know or we are talking in a vacuum * the best is to be silent!

In a few seconds at 100 ° C the coronavirus is kaputt!

This mask will obviously include a classic filtration system as well: it is noted above! Air heating is an additional security!

* like I’m going to add you to the troll list, that’s already some messages that prove that you are an embittered ...