As I'm sure some of you noticed, very shortly after Ernest posted the update to KBin that allowed for abandoned magazine adoption, I took over this magazine....
I think a wiki of useful software and communities would be great! On reddit, weekly threads were often designed to corral posts so that the subreddit wasn't flooded with similar topics. It seems like that's not a problem here, so weekly posts would have to be pretty open-ended to spur discussion. For example, this week there could be a Black Friday Hardware Deals Post or something (e.g. I hear those 18TB WD hard drives at Best Buy are decent starter NAS material). Next week, there could be a post about shucking the drives.
Korea is regarded as a "water-stressed nation." Although the country receives an annual precipitation of approximately 1,300mm, it is characterized by concentrated periods and specific regions, thereby giving rise to challenges stemming from water scarcity. The lack of drinking water extends beyond mere inconvenience, posing...
how much space would one need to generate enough water for say, an average household in South Korea?
Alright, here are some "back of the envelope" calculations based on the information available. I hope I don't screw anything up, and please ignore my utter disrespect for significant figures.
The Mayo Clinical says that the average person needs about 2.7-3.7 liters of water per day. Normally, this comes from both food and beverage, so how much of that you actually need to drink is going to vary depending on your diet, but let's assume worst-case scenario, where all of your water comes from this device.
Given the stated output, and the fact that water conveniently has a density of 1kg/L, it seems that you'd need anywhere from 9-18kg (20-40lbs) of MOF to produce enough water for one person per day if this was your only source.
(1kg MOF/0.285kg water * 1kg water/1L water * 2.7L water/person = 9.5kg MOF/person)
(1kg MOF/0.210kg water * 1kg water/1L water * 3.7L water/person = 17.6kg MOF/person)
ArcGIS says the average household in South Korea is 2.4 people, so now we're at 22.8-42.2kg (50-93lbs) of MOF to meet the water requirements.
I have no idea what the density of MOF is, so I don't know how much space this would take up. Metals vary significantly in density, but we can look at Aluminum (2600kg/m^3) and Lead (11,300kg/m^3) to get some idea of range.
22.8kg * 1m^3/2600kg = 0.00877m^3
22.8kg * 1m^3/11,300kg = 0.0020m^3
42.2kg * 1m^3/2600kg = 0.0162m^3
42.2kg * 1m^3/11,300kg = 0.0037m^3
I'm struggling to come up with "real world" equivalents to help you visualize the volumes. The smallest one is a sphere about 16cm (6.3in) in diameter. The largest one is a sphere about 31cm (12.2in) in diameter.
Obviously, the device wouldn't be a sphere, and it wouldn't be made of just MOF. The diagram showed a tube of MOF wafers surrounded by a container, but that should give you a very basic idea of the materials required. Again, this is all assuming I didn't make any mistakes, which feels like a bold assumption at this point.
What would you all like to see from this magazine? (kbin.social) en
As I'm sure some of you noticed, very shortly after Ernest posted the update to KBin that allowed for abandoned magazine adoption, I took over this magazine....
Water harvesting in Death Valley: Conquering the arid wilderness (phys.org) en
Korea is regarded as a "water-stressed nation." Although the country receives an annual precipitation of approximately 1,300mm, it is characterized by concentrated periods and specific regions, thereby giving rise to challenges stemming from water scarcity. The lack of drinking water extends beyond mere inconvenience, posing...