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#101 2019-10-05 19:14:07

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,913

Re: Testing My Hacienda On Mars Society Devon Island

Energy from the sun
devon-island-1024x822.png

Devon Island is the largest uninhabited island on Earth. It is found at 75oN and has  surface characteristics that strongly resemble the surface of Mars. Being so far north, Devon Island has solar irradiance similar to the solar irradiation on the Martian Equator. Except for a brief period in June, the intensity of the Sun on Devon Island never exceeds the solar intensity on Mars.

Although the light intensity (near local noon only) on Devon Island is similar to that expected on the Martian Equator, the duration of daylight during this time is 24 hours per day because of its high latitude (above the Arctic Circle).

On Mars, near the equator, the duration of daylight is about 12 hours, followed by approximately 12 hours of darkness.

Mars, spring is 7 months, summer is 6 months, fall is 5.3 months and winter is a little over 4 months long..

https://www.slideshare.net/vijayraskar5 … alculation

Edit reference
https://www.ossila.com/pages/solar-cells-theory

The oscurity opaceness of the light and difussing of its energy can not be predicted for intensity level or for its duration hence why we need more than solar for mars.

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#102 2019-10-06 07:04:37

tahanson43206
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Registered: 2018-04-27
Posts: 8,112

Re: Testing My Hacienda On Mars Society Devon Island

For SpaceNut re #101

Thanks for this overview of Devon Island, and for the link to the slideshare site, which I had not seen before.  It appears to have potential for further visits. 

The computation of light levels would appear (to me at least) to have direct application for lighting of interior spaces.

I'm still hoping someone will discover any available reports from the Russians on their development of subterranean living/working spaces in their far North.

(th)

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#103 2019-12-28 20:42:05

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,913

Re: Testing My Hacienda On Mars Society Devon Island

We need to keep in mind that we will make methane by other means such as an  Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation this would also include feeding algea that is not used into the source of materials to feed the digester....

https://sswm.info/sswm-solutions-bop-ma … l-scale%29

The calorific value of biogas is about 6 kWh/m3, what corresponds to about half a litre of diesel oil.

The atmosphere of Mars is the layer of gases surrounding Mars. The atmospheric pressure on the Martian surface averages 600 pascals (0.087 psi), about 0.6% of Earth's mean sea level pressure of 101.3 kilopascals (14.69 psi)...

While the oceans have more co2 desolved it still makes sense to test out production safety for anything we would want to send to mars.

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#104 2021-11-25 13:09:17

SpaceNut
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From: New Hampshire
Registered: 2004-07-22
Posts: 23,913

Re: Testing My Hacienda On Mars Society Devon Island

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#105 2021-11-25 13:37:45

Calliban
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From: Northern England, UK
Registered: 2019-08-18
Posts: 1,338

Re: Testing My Hacienda On Mars Society Devon Island

The average insolation in the SE England is 1000kWh per square metre per year.  That works out to an average of 114W/m2.  About 50% of the Martian surface receives more insolation than that.  In Scotland, insolation is between 700-800kWh/m2 per year.  The UK has one the highest agricultural productivity in the world.

I don't think Martian insolation levels pose a severe limitation to crop growth.  A bigger challenge is keeping agricultural areas warm.  There is enough light to sustain most crops.  But not enough heat.  Frost kills most plants.

Last edited by Calliban (2021-11-25 13:42:28)


"Plan and prepare for every possibility, and you will never act. It is nobler to have courage as we stumble into half the things we fear than to analyse every possible obstacle and begin nothing. Great things are achieved by embracing great dangers."

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