https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572 Appropriate Technology en-us 2021-10-06 00:56:13 UTC 2023-08-16 19:10:18 UTC hello@padlet.com https://padlet.net/icons/png/1f44d.png https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812421389 Pot in Pot Cooler(항아리 속 항아리 냉장고)]]> 2021-10-13 01:13:03 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812421389 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812455808 There was no refrigerator in fortuneless parts of Africa. But this was not only problem. Even if they had an refrigerator, they couldn't storage food because of the poor supply of electrical energy.So they invented 'pot in pot cooler'. They put smaller pot inside of bigger pot and fill the space between with sand. Fruits and vegetables in pots remain fresh for a longer time than at room temperature.]]> 2021-10-13 01:26:36 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812455808 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812456661 It is estimated that this was first used in about in 3000BC in the Mesopotamia area. This was also used in Egypt about in 2500BC.
At 1995, Mohamed Bah Abba developed the pot-in-pot refrigerator with moist sand.]]> 2021-10-13 01:26:58 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812456661 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812457267 First, using wet clothes. Wet cloth will block the cold air, inside the pot, to go out. Also, when water of wet cloth evaporates, water will absorb heat. This phenomenon is widely used to decline the temperature. It will make food cooler. Second, pour water to sand. Water will evaporate faster when the sand absorb  water. We can use dirt, too. On a day when it's over 40 degrees, inside the pot is 22 degrees. It is more efficient in dry climate than humid climate.]]> 2021-10-13 01:27:14 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812457267 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812457963 Appropriate technology refers to a technology created in consideration of the characteristics of a community. Appropriate technology uses fewer resources, is easier to maintain, and has less impact on the environment.]]> 2021-10-13 01:27:32 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812457963 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812478187 2021-10-13 01:35:41 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1812478187 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1823268427 I got to think that appropriate technology is important. If there wasn't any appropriate technology like this pot in pot cooler, the people that doesn't live well would be even harder to live.]]> 2021-10-18 05:29:37 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1823268427 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1823277616 I think Appropriate technology is important  because It helpes  people whos lives in the poor contries or non-modernized countries.]]> 2021-10-18 05:36:16 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1823277616 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1824411569 The reason you think the technology is important.
-->These days, global warming is a big issue. It made the summer hotter and the winter colder. All people are sick and tired of this crazy weather. To slow down global warming, we should do something else. Because I think not depending on the machine is effective, I evaluate this product, good.]]> 2021-10-18 15:00:21 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1824411569 https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1824412924 I think this is innovative technology because it can keep foods well without electricity. Thanks to Pot in pot cooler, many poor people  can eat food that hasn't gone bad. In the future, I hope we are able to save both foods and environment by costless innovative technology.]]> 2021-10-18 15:00:48 UTC https://padlet.com/LEEDONGHU/m8syxxs2ktuhy6kc1645023572/wish/1824412924