雪櫃、冷氣機、水煲等等各電器不時都會散發出熱力。432Please respect copyright.PENANApDn7jP1qfv
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。432Please respect copyright.PENANAYZ3WloUCc2
432Please respect copyright.PENANAM3tyoKf4Ce
432Please respect copyright.PENANA4f7vuaBKzY
(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。432Please respect copyright.PENANADS6oKaNRaS
432Please respect copyright.PENANArnKSWcbcY6
432Please respect copyright.PENANAZmGCoFSxrY
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。432Please respect copyright.PENANAXwuEoMOj29
432Please respect copyright.PENANAGnkgH0dz1p
(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。432Please respect copyright.PENANAntT12d5mOZ
432Please respect copyright.PENANAAtzNaPmla7
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。432Please respect copyright.PENANAJec73oY6vv
432Please respect copyright.PENANA6UHsserKe3
432Please respect copyright.PENANAFf1ZCggn4I
選用Fe(CN)6 –4的原因基於其兩種特質。432Please respect copyright.PENANAQfrMZMHahM
432Please respect copyright.PENANALz1oVUlWlw
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。432Please respect copyright.PENANAVQTd9F4Z0a
432Please respect copyright.PENANAEWKM2sQSgd
2.它遇熱的時候會放出電子並成為Fe(CN)6 –3。432Please respect copyright.PENANAkLUQr1hLTW
432Please respect copyright.PENANA7BywJP5pGZ
(圖4)以下就是利用熱力發電的精髓要點。432Please respect copyright.PENANAgSSmoUGHVh
432Please respect copyright.PENANAI7wuXd0Lm0
432Please respect copyright.PENANAPjFu9qCLen
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。432Please respect copyright.PENANAwaovYLlZ9f
432Please respect copyright.PENANA3MHm0oKpnR
2.電子在閉合電路走動,產生電流,讓燈泡發亮。432Please respect copyright.PENANAOKnMbjmQwi
432Please respect copyright.PENANAHAD93F80fk
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。432Please respect copyright.PENANANrlHT591Gd
432Please respect copyright.PENANAIBBlpbw2SD
4.Fe(CN)6 –4在Guanidinium ion的輔助下變成固體結晶。432Please respect copyright.PENANAFJLrNLj63g
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。432Please respect copyright.PENANAPJXb08g6qR
432Please respect copyright.PENANAZzD0MKFTsW
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。432Please respect copyright.PENANABOx1gCA54z
432Please respect copyright.PENANAiuzhrcUCPb
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。432Please respect copyright.PENANA3Vx70pugzy
432Please respect copyright.PENANASOA22VMc00
(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。432Please respect copyright.PENANAbmbmpugjvw
432Please respect copyright.PENANAab055tEjlg
432Please respect copyright.PENANA0lZ6E7DO5n
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。432Please respect copyright.PENANAvb6XGvujad
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。432Please respect copyright.PENANAagqUauUgFi
432Please respect copyright.PENANAAJnr2Npaw2
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。432Please respect copyright.PENANAWpLdBB5zr3
432Please respect copyright.PENANArGPSVFbtW3
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/toc432Please respect copyright.PENANAsWgXThNkU9
432Please respect copyright.PENANAhuPzByKCIO
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。432Please respect copyright.PENANAgRrfMl5MLO
432Please respect copyright.PENANAGxudYUk1Vh
Link:432Please respect copyright.PENANAyCCxH037Mx
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio432Please respect copyright.PENANAZttomWPWBE
432Please respect copyright.PENANAObmYZO6LGm
432Please respect copyright.PENANAhC3YZqTQzE
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。432Please respect copyright.PENANAuTmSGBRXpO
432Please respect copyright.PENANAL0CKSFJAtD
Ref1:https://science.sciencemag.org/content/early/2020/09/09/science.abd6749432Please respect copyright.PENANAWtabKCvZPE
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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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