雪櫃、冷氣機、水煲等等各電器不時都會散發出熱力。715Please respect copyright.PENANAaQvEDxCLVQ
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。715Please respect copyright.PENANA0lyQixbLI1715Please respect copyright.PENANA968GvNGKHW
715Please respect copyright.PENANAPWBUryWrvJ
(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。715Please respect copyright.PENANAN4oKuwTuvr715Please respect copyright.PENANAsotVl6lQye
715Please respect copyright.PENANAnpQKuzGesX
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。715Please respect copyright.PENANAqNdVBWDpK8
715Please respect copyright.PENANAIkBOT5xE69
(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。715Please respect copyright.PENANAMTKRu708vi
715Please respect copyright.PENANAjPsoBXQC5z
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。715Please respect copyright.PENANAIo47AsFNzd715Please respect copyright.PENANATOXynrGQNm
715Please respect copyright.PENANAtoMUiyu5hE
選用Fe(CN)6 –4的原因基於其兩種特質。715Please respect copyright.PENANANpyZQyaXhk
715Please respect copyright.PENANAl0wiL7bakI
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。715Please respect copyright.PENANAIbyzoGnVrj
715Please respect copyright.PENANA2uZ1QfBdrj
2.它遇熱的時候會放出電子並成為Fe(CN)6 –3。715Please respect copyright.PENANA9toCNgtWvu
715Please respect copyright.PENANAd8MtfDq0EU
(圖4)以下就是利用熱力發電的精髓要點。715Please respect copyright.PENANApE6f1uPSnb715Please respect copyright.PENANALMsavQS0Cy
715Please respect copyright.PENANAnoVfIRjelm
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。715Please respect copyright.PENANAb685bxGfOt
715Please respect copyright.PENANAwnHlo2vgvd
2.電子在閉合電路走動,產生電流,讓燈泡發亮。715Please respect copyright.PENANA5OJBL5lMsy
715Please respect copyright.PENANAzynwP1kJl1
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。715Please respect copyright.PENANAcTrvaJ1MdT
715Please respect copyright.PENANA6Cc9zQS0J5
4.Fe(CN)6 –4在Guanidinium ion的輔助下變成固體結晶。715Please respect copyright.PENANA7LLkNPl5oC
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。715Please respect copyright.PENANApL41xmwRFI
715Please respect copyright.PENANA0jRivuvI2m
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。715Please respect copyright.PENANA6ZKBbWebq7
715Please respect copyright.PENANAb9XJH1utaX
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。715Please respect copyright.PENANAuHFiZ5p6I5
715Please respect copyright.PENANA2Pi1qHIixH
(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。715Please respect copyright.PENANAImt7n2qDW2715Please respect copyright.PENANAju3cMQVuqu
715Please respect copyright.PENANABFPu1Fzkbo
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。715Please respect copyright.PENANAnlmiULP6Uw
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。715Please respect copyright.PENANAdLbtfYfJzR
715Please respect copyright.PENANAZrhvrNOkst
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。715Please respect copyright.PENANAUIpKe7X4TK
715Please respect copyright.PENANATbyHtNxgfJ
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/toc715Please respect copyright.PENANAA2uv8dhNu4
715Please respect copyright.PENANAmPtfnyUn2C
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。715Please respect copyright.PENANAfQigPyqlGg
715Please respect copyright.PENANAl94XDkMXdM
Link:715Please respect copyright.PENANAaHuPmeQ9nG
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio715Please respect copyright.PENANACvjC9BR2dW
715Please respect copyright.PENANA4U9iNURXb6
715Please respect copyright.PENANAI7liXA7GVb
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。715Please respect copyright.PENANAM1oY0ak20l
715Please respect copyright.PENANAsVabbCSEq6
Ref1:https://science.sciencemag.org/content/early/2020/09/09/science.abd6749715Please respect copyright.PENANAoEGCmKbBbm
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科普專欄–薯不揀單
作者:
薯仔聞茱莉

篇 #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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