关于瓶子空调的讨论逐梦
2016-07-27 18:32 来自QQ空间日志
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I saw today the same technology also promoted on the CIBSE Bulletin Board even with a video "explaining" how it works (the plastic bottles supposedly "compresses and cools the air")
我看到今天 CIBSE Bulletin Board 上展示了同样的科技，一个视频解释了塑料品如何压缩并冷却空气的。
To me, this seems more like wishful thinking. My comment posted on the CIBSE Bulletin Board was:
我认为这就是想当然了，我在 CIBSE Bulletin Board 上的回复是这样的：
I don't understand how this would work from a thermodynamic point of view. There has to be some air velocity to begin with, in which case I can see how the bottles might channel the air flow resulting in higher air velocities coming out of the bottle openings, but wouldn't the total amount of air flow be the same, or less than through the window opening with no obstruction? Also, someone explain to me how compressing the air will cool it?? I've always thought that compressing the air would heat it up, although in this case the effect would be extremely minimal either way.
“我不能理解，从热力学的观点如何来解释这个过程和原理。首先要有点有速度的空气，这个过程我能看到，瓶口引导气流排出更高速度的空气。可是难道气流总量不是一定的吗？或者少于完全没有阻碍的气流量。同时有人跟我解释说压缩可以制冷??我以为认为压缩只能加热，尽管在这个案例中这个效果被极端缩小化了。”
Joe
Joe HuangWhite Box Technologies, Inc.346 Rheem Blvd., Suite 205AMoraga CA 94556
yjhuang@whiteboxtechnologies.com
http://weather.whiteboxtechnologies.com
for simulation-ready weather data(o) (925)388-0265(c) (510)928-2683"building energy simulations at your fingertips"
My observations are that the air does heat up when compressed then cooled when it decompresses. For example, if you have a large take of compressed air used to fill a small tank, the small tank heats up as it is filled and the large tank cools off as it does the filling of the small tank.
我认为空气压缩则加热，释放则制冷。举个例子，如果假设你有大器皿的压缩空气填充一个很小的器皿。小器皿充满的时候变热，大器皿放气的时候变冷。
That would lead me to believe that, in the end, the air would be roughly the same temperature after it went through the compression then decompression as it traveled through the bottles from outside to inside. The bottles might absorb some of the heat from the compressed air and then you would have a wall that is warmer than room. In the end, I don’t believe there would be much change in temperature in the room.
这让我相信一点，空气通过压缩或者释放，最终空气将大概两边温度相同。瓶子也有可能吸收压缩产生的热量，因此墙面温度高于室温。最终的结论是，我不相信房间的温度有什么大的改变。
Christopher Jones, P. Eng.
Rowan Williams Davies & Irwin Inc.
Consulting Engineers & Scientists
901 King Street West, Suite 400, Toronto, Ontario, M5V 3H5
T: (519) 823-1311 ext 2052
M: (416) 697-0056
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