PCDVD數位科技討論區 - 為什麼沒"太陽能"冷氣機?

PCDVD數位科技討論區 (https://www.pcdvd.com.tw/index.php)

- 七嘴八舌異言堂 (https://www.pcdvd.com.tw/forumdisplay.php?f=12)

- - 為什麼沒"太陽能"冷氣機? (https://www.pcdvd.com.tw/showthread.php?t=1017338)

引用:

作者knsm

除了面積還有成本攤提的問題

印象中之前看過別人的碩士論文有提到 , 成本攤提電費大約需要45年~60年

以現在台電對民營太陽能的購電價格
大概約10年可以回本

不過那的價格是一般民間電價的2~3倍
圖利廠商~

成本與時間效應啊
以我家頂樓為例大概大太陽一天能產60度還是80度左右的電
60度(80度)的電能開多久的冷氣我是不知道啦(電費都家人在繳的XD
而我頂樓加裝的那些東西可不便宜啊
你會發現你有個近百萬閒錢不如拿來繳電費比較簡單
那種裝一堆太陽能板在頂樓的都是想賣電等撐個10~15年回本之後變淨賺的
至於如意算盤能否打響
我也不知道
因為我家是今年才裝的XD

熱泵......

這個比較實際......

引用:

作者YCD

過程中沒維修(花很多錢的那種)...應該是可以

就是賭這段時間不會壞...

引用:

作者knsm

疑問是這樣的溫度能不能煮出壓力夠高的蒸氣 ??

如果能煮出壓力夠高的蒸氣那轉換成本呢 ,另外是陽光的穩定度 ??

倒是覺得豬大便牛大便好像是還不錯的發電選擇

唯一的問題是臭了一點

燒甲烷或是我們不要但是有熱值的東西也不錯, 不過就是沒這麼乾淨.

太陽光一直是我們又愛又恨的東西, 就是不容易好好利用.

引用:

作者無責任

我不懂風場
那時看新聞覺得它的追風設定很不錯，原理應該像測風向公雞那種..
記得新聞說不用很大的風量就能吹動

你說的"不是看到風力發電有轉就能發電"我就不太懂了，
發電機不是動能轉電能?

風力發電機轉的太慢其實根本沒辦法發電

就算轉的速度再稍微快一點,能發電了, 光中間的轉換損失最後也沒辦法並聯輸出到家庭用電上

引用:

作者knsm

除了面積還有成本攤提的問題

印象中之前看過別人的碩士論文有提到 , 成本攤提電費大約需要45年~60年

每個地方都不一樣. 在台灣有台電在賠錢賣電, 要賺回成本是很不容易. 但在高電費國家情況就不同了.

所以成本要自己算, 否則沒意義.

效率跟不上

建構成本會很高

.

引用:

http://www.technologyreview.com/vie...in-chinese-lab/

Artificial Black Hole Created in Chinese Lab

Cloaking technology used to create a region of space that allows microwaves in, but not out again

If you haven’t heard of metamaterials and what they can do, where have you been? Most of the media coverage so far has focused on invisibility cloaks but that’s just the start of the fun physicists can have with this stuff. Only a few weeks ago we were discussing how to recreate the big bang inside a metamaterial. And earlier this year, a group of physicists suggested that it ought to be possible to create a black hole using metamaterials. That’s an interesting idea but a demonstration would be more exciting.

Step forward Qiang Cheng and Tie Jun Cui at the State Key Laboratory of Millimeter Waves at Southeast University in Nanjing, China, who have used metamaterials to create the world’s first artificial black hole in their lab. Yep, a real black hole.

That’s not quite as scary as it sounds. A black hole is a region of space from which light cannot escape (that’s why it’s black). According to Einsteins’ theory relativity, black holes form when space becomes so distorted by a large mass that light cannot escape its gravitational field.

But gravity needn’t be involved. Metamaterials also distort space, as far as light is concerned anyway (in fact there is a formal mathematical analogy between these optical and gravitational distortions). Physicists have already exploited this distortion to steer light around an object within a metamaterial to create an invisibility cloak. If that’s possible, then more exotic distortions ought to be possible too.

Now Qiang and Tie have created a metamaterial that distorts space so severely that light entering it (in this case microwaves) cannot escape.

Their black hole consists of 60 layers of printed circuit board arranged in concentric circles (see picture below). The printed circuit boards are coated in a thin layer of copper from which Qiang and Tie have etched two types of pattern that either resonate at microwave frequency or do not.

In their experiments, they’ve measured microwaves at 18 GHz going in and none coming out. And the circular symmetry of their metamaterial means that the microwaves are absorbed in all directions at once. What they’ve built is the world’s first artificial black hole. (In case you’re wondering, the energy absorbed by the black hole is emitted as heat.)

That’s an exciting piece of physics and not just because it’s a headline grabber. Artificial black holes could have important applications not least as light harvesters for photovoltaics. The prospect of a black hole in every household may not be as far-fetched as it sounds.

Ref: arxiv.org/abs/0910.2159: An Electromagnetic Black Hole Made of Metamaterials

等人造黑洞商品化，應該可以提升太陽能蒐集的效能

引用:

作者knsm

很多比較舊的大樓都有化糞池應該是不錯的發電來源，可以供給社區的公共用電。

目前比較實用的似乎只有熱泵熱水器

可以把轉換後的冷空氣引進室內 :p

-