Cheap Solar Fridge by cruzer28

自己做便宜的太阳能冰箱

（译者按：如果能不花电费，靠阳光来提供能源的冰箱，效果又好的，消费者当然乐意接受。可是，如今光伏板的效率仍旧低下，且价格不菲，似乎要做到这样的冰箱遥遥无期。这个教程说的，确实是太阳能，但是需要各位重新拾起中学学过的物理知识才能理解。附带一句：这个冰箱是没有结冰功能的。）

This instructable is being entered in the Green Tech Contest so please vote.

This solar fridge is a simple and quick diy project. The reason I decided to build it was because the fridge in your house takes up a ton of energy. This fridge is so cheap and reliable that it can be used in 3rd world countries. It takes about 15 to 30 minutes to complete and it only cost around $15 dollars.
这个太阳能冰箱是个快速简单的DIY作品。我决定做这个的原因，是因为发现家中的冰箱消耗无数的能量。这台冰箱是那么便宜可靠，甚至能在第三世界国家使用。花上大概15到30分钟就能完成，仅需约15美金左右的成本。（译者注：按购买力计算，变成人民币估计连10块钱都不到。）

Here is what you need
下面是你需要的材料

1 large clay flower pot
1 small clay flower pot
sand (I used about 1/4 of a bag)
towel
water
clay or plumbers putty (only needed if there is a whole in the bottom of the pot)
- 一个大陶罐花盆
- 一个小陶罐花盆
- 沙子
- 毛巾
- 水
- 粘土或者水管胶（如果在花盆底部有个洞才需要）

Step 1: Filling up the holes

一、填洞

The first step is to see if you have a hole at the bottom of your pot. If there is not a hole then you can skip this step. If there is a hole then take your clay or putty and firmly press it into the hole and cover it. Make sure there is no gaps for water to leak out.
第一步其实是要看你的花盆底部是否有个洞，如果没有就可跳过。有洞的话，就用粘土或者水管胶紧紧按在洞上盖住它，让上面没有缝隙无法漏水。

Step 2: Even the pots

二、平整花盆

Fill the larger pot with a layer of sand. Then put the smaller pot inside the larger one and level the sand until both pots are at even height.
在大花盆下面铺上一层沙，然后将小花盆放在大花盆上面，将沙子填到两个花盆一样高为止。

Step 3: Finishing with the sand

三、填沙子

Fill the remaining area between the pots with sand.
将花盆之间剩下的部分用沙子填满。

Step 4: Time to put the water in

四、倒水

Pour water into sand to saturate it completely. Once the water begins welling up instead of soaking in, you can stop.
将水倒入沙子，完全泡透沙子，当水开始溢出而不是吸收的时候就停止。

Step 5: Stock the fridge

五、冰箱中存放东西

put any items you want into the fridge.
在冰箱中放上你想放的东西。

Step 6: Almost done

六、接近完成

Now you have to soak the towel and place it over the top of the pots.
现在将毛巾泡水，将它盖在花盆上。

Step 7: Usage of your fridge

七、冰箱的用法

Make sure you put your fridge in a shaded place. Also return once or twice a day and refill the sand with water and dampen the towel.
要将冰箱放在阴凉处，每隔一两天重新在沙子里灌水，并打湿毛巾。

Step 8: How it works

八、工作原理

The action that allows it to stay cool is the evaporation of the water surrounding the smaller pot. As the water evaporates, heat draws out from the smaller pot, keeping the contents inside much cooler the the surrounding environment.
它能冷却的原理是依靠小盆周围水的蒸发现象。当水蒸发时，把小盆里的热量带走，使里面东西的温度远低于周围环境的温度。

（译者后记：书中自有黄金屋，书中自有颜如玉。学过的知识懂得运用确实能抵黄金，虽然人人都喜欢的黄金外表并不一定很美，甚至很丑——这个花盆冰箱需要美化。）