The belief among many South Koreans is that if you sleep in a closed room with an electric fan on you can die. I didn’t believe this was a real belief until I started researching it further on the internet and found that it is a widely held belief.
I set out to determine why so many believe it and from what I can find it is because the government created this myth to help out with the electricity demand problem they were having at the time electric fans came into prominent use.
There were so many South Koreans adopting electric fans to cool their homes that the electricity grid in South Korea could not keep up with the demand for electricity.
Hodges also shared the following passage from the government-issued Cultural Guide for Migrant Workers in Korea: “In some cases, a fan turned on too long can cause death from oxygen deficiency, hypothermia, or fire from overheating.” “Some Koreans,” he adds, “give outlandish explanations about how the whirling blades of a fan can sever oxygen molecules.”Nowhere in any scientific literature does this myth come up.
Also there is no other country that has this belief regarding electric fans but that of South Korea. Of course not all South Koreans believe this but it is remarkable that such a belief exists still to this day in this country.
Snopes has an interesting article about this here and Hyphen magazine also has a good story on this as well here
Some South Koreans Believe Electric House Fans Can Kill You, Why is This? November 20th, 2012DonnyE
There have been worries over the last few years about where Texas will get the future energy they need to power our expanding economy. The electricity demand on the grid in Texas continues to get worse and our power generation infrastructure has not been able to keep up.
Fascinating science however is finding out things that we could only dream about a few short years ago. Take for instance new metal alloys only recently discovered as little as a year ago. It is known as: Ni45Co5Mn40Sn101. Whatever that means 🙂
There is one known alloy material that was discovered at the University of Minnesota that can directly take heat and convert it to electricity at the lowest hysteresis ever found. This simply means it converts heat to electricity better then anything currently in the market. Imagine this working on a car exhaust or electricity turbine?
Although most of us practically look at things like our current power infrastructure such as the natural gas and coal fired power plants we mainly use to produce electricity in Texas we may be able to make these plants much more efficient in the not so distant future.
Imagine being able to take the heat coming off of steam generated turbines that are already heating metal in these generation facilities and send that on to the electric power lines.
You could drastically reduce the waste of burning fuel only to then create a another form of power. When you burn up fuel you lose some of that resource when electricity is generated so any way to capture that energy as it turns to heat is a great benefit.
The alloy is a multiferroic composite of nickel, cobalt, manganese and tin. The metal can be non-magnetic and highly magnetic based on what temperature it gets heated up to. Having magnetism and a permanent electric polarization is very rare for an alloy.
A small increase in temperature is all that is needed for the metal to go from non-magnetic to very magnetic. Unfortunately this metal loses some of the heat energy but a good amount of it is converted to electricity. The positive aspect to this alloy is that it has a very low hysteresis compared to other things which allows it to be the most efficient method of turning large amounts of heat energy into electricity that would have normally gone to waste.
A common example to help explain just how this metal could work is the idea of capturing the heat from a car exhaust and allowing that heat to be converted into electricity.
General Motors is already working on similar devices for their vehicles but the efficiencies is nothing like what is found in this new alloy. You will likely see this alloy being deployed in future cars, power generation plants and other applications in the future.
If you would like to read more about this topic please visit this link: popsci.com and watch the video below.
Finding New Energy from Wasted Energy November 20th, 2012DonnyE