雪櫃、冷氣機、水煲等等各電器不時都會散發出熱力。430Please respect copyright.PENANAbMZgaCoHJF
如果將這些多餘的熱力轉化成為電力,便能夠更有效運用資源,不作浪費。430Please respect copyright.PENANAl5Ga3hlDCM
430Please respect copyright.PENANAV5nayEU2kj
430Please respect copyright.PENANAJjwN3KH8kt
(圖2)繼續深入講解之前,我們先以非常簡單的方法概括一下發電的原理。430Please respect copyright.PENANA2ddOZB0yN5
430Please respect copyright.PENANAAdeYtLrQHy
430Please respect copyright.PENANApcvyCrUXz5
只要電子在閉合電路單方向流動,就能促成電流,提供電力讓燈泡發光。430Please respect copyright.PENANAB3vCJjjyyw
430Please respect copyright.PENANApQBjiH2mVy
(圖3)要把熱力有效轉化為電力,我們需要一樣能夠有效傳遞電子而同時又不會傳遞熱力的物料。430Please respect copyright.PENANAEh4cZPe4Lb
430Please respect copyright.PENANAjpPmFIZdwz
有科學家最近發表文章(Ref1),利用化學物ferricyanide ion Fe(CN)6 –4作為媒體把熱力轉化為電力。430Please respect copyright.PENANAnzbR4MtnWP
430Please respect copyright.PENANAdHDlp2r7Ft
430Please respect copyright.PENANAsWEIqyDx1j
選用Fe(CN)6 –4的原因基於其兩種特質。430Please respect copyright.PENANAlbJHF84wwL
430Please respect copyright.PENANAppfruFOrEs
1.它遇冷(約攝氏20度左右)的時候,再加上Guanidinium ion的輔助下便會變成固體結晶。430Please respect copyright.PENANAp9fBO5LfHA
430Please respect copyright.PENANAHwQXBFvaI7
2.它遇熱的時候會放出電子並成為Fe(CN)6 –3。430Please respect copyright.PENANAO3366qIXE0
430Please respect copyright.PENANAMgEvtEs4wZ
(圖4)以下就是利用熱力發電的精髓要點。430Please respect copyright.PENANAX3PJ54op2j
430Please respect copyright.PENANA6Qz2WwhFOz
430Please respect copyright.PENANAFHrWmzP9Dw
1.Fe(CN)6 –4遇上外間熱力(例如電器所散發出的熱力),因而會釋發電子並成為Fe(CN)6 –3。430Please respect copyright.PENANAJDiOkR54Dj
430Please respect copyright.PENANAfFUmBVAOp0
2.電子在閉合電路走動,產生電流,讓燈泡發亮。430Please respect copyright.PENANAA1yEO7azJ1
430Please respect copyright.PENANAqzcdd8J1Tt
3.電子到達另一端的凍金屬棒(約攝氏20度)後,從第1點所得來的Fe(CN)6 –3便會接收電子,變回Fe(CN)6 –4。430Please respect copyright.PENANAsYcz07R0cb
430Please respect copyright.PENANAYZFXmhrbh1
4.Fe(CN)6 –4在Guanidinium ion的輔助下變成固體結晶。430Please respect copyright.PENANA4kyR5IEeNl
固體相對上傳熱的能力比液體較弱,因而減低了熱金屬棒把熱力傳到凍金屬棒的效率,促使凍金屬棒及熱金屬棒維持著溫差。430Please respect copyright.PENANApDpiv6zwmN
430Please respect copyright.PENANA71H9dahlRs
5.在地心吸力的影響下,固體結晶會趨往金屬棒那方。而在熱力的影響下,固體結晶變回液態Fe(CN)6 –4,重回第1點不斷循環。430Please respect copyright.PENANAwGTqLuUyNk
430Please respect copyright.PENANA1chrevAnbO
綜合來說,科學家巧妙利用了Fe(CN)6 –4遇熱釋出電子的特點,以及遇冷配合Guanidinium結成固體、固體不易傳熱的特質,建造了有效傳遞電子而同時又不會有效傳遞熱力的物料。430Please respect copyright.PENANAO6XSzZvXku
430Please respect copyright.PENANA7YnzQ1KzC2
(圖5)科學家在文中亦嘗試利用20個圖4的模組,在兩極維持50度的溫差下,提供電力予各用途之上。430Please respect copyright.PENANAFTojvFepwu
430Please respect copyright.PENANAAEoHd7ODd3
430Please respect copyright.PENANA4AgDzKHl0W
現在需要解決的問題,就是找出收集多餘熱力的有效方法及物料,引導熱力到模組裡頭。430Please respect copyright.PENANAMB3tr7gzWH
文章作者表示現時已積極尋找物料,相信假以時日絕有可能會在市面見到收集電器熱力發電的設備。430Please respect copyright.PENANAWsxZoT753Q
430Please respect copyright.PENANAVQDCqI0WV8
如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。430Please respect copyright.PENANA97WrLJEkiY
430Please respect copyright.PENANA4g3RKyqHSD
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc430Please respect copyright.PENANA1d17RyoMcQ
430Please respect copyright.PENANAUFztCX6PVs
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。430Please respect copyright.PENANA6TbilCVqdV
430Please respect copyright.PENANAbR3KCBLSSb
Link:430Please respect copyright.PENANA3odL70rUOX
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio430Please respect copyright.PENANAUVLXHlVDcv
430Please respect copyright.PENANA5zxtNxMBZ6
430Please respect copyright.PENANARDFQ4BwfTb
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。430Please respect copyright.PENANAITtgeMgZyZ
430Please respect copyright.PENANABDY2vj5Bqx
Ref1:https://science.sciencemag.org/content/early/2020/09/09/science.abd6749430Please respect copyright.PENANAS8deqWpdIm
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科普專欄–薯不揀單
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #48
深入淺出–利用家庭電器散發熱力的發電可能性
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