雪櫃、冷氣機、水煲等等各電器不時都會散發出熱力。472Please respect copyright.PENANAoAF1eKB4qv
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。472Please respect copyright.PENANAX6moV6fL3s
472Please respect copyright.PENANACgw75fsyGC
472Please respect copyright.PENANAxRUrB6yK0q
(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。472Please respect copyright.PENANA2E1D49oOX8
472Please respect copyright.PENANAlzJe9BmL83
472Please respect copyright.PENANAlzIOC3xReo
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。472Please respect copyright.PENANAxLejNw6u5V
472Please respect copyright.PENANAt8SA4SgEkp
(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。472Please respect copyright.PENANAOY8MyGs6Y7
472Please respect copyright.PENANAhnZiHLFNmV
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。472Please respect copyright.PENANAd2CZAUzWla
472Please respect copyright.PENANAGhCdM4zSKo
472Please respect copyright.PENANAresoP6m0Ep
選用Fe(CN)6 –4的原因基於其兩種特質。472Please respect copyright.PENANAxTfGmeQSeh
472Please respect copyright.PENANAnX2ezW3mJS
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。472Please respect copyright.PENANA4xpORE34zo
472Please respect copyright.PENANAFH1QP2GxNd
2.它遇熱的時候會放出電子並成為Fe(CN)6 –3。472Please respect copyright.PENANAcoB7Ja2EFa
472Please respect copyright.PENANAoyL1C1XzqT
(圖4)以下就是利用熱力發電的精髓要點。472Please respect copyright.PENANA3qDJk3MiQy
472Please respect copyright.PENANA5rV1ZU8pDI
472Please respect copyright.PENANAAIyEPrtFK0
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。472Please respect copyright.PENANAHDBEKCgwrq
472Please respect copyright.PENANAz32OddrYSZ
2.電子在閉合電路走動,產生電流,讓燈泡發亮。472Please respect copyright.PENANAbBAPDKetT2
472Please respect copyright.PENANAVyiPGPqri2
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。472Please respect copyright.PENANA9b2Oga3Enz
472Please respect copyright.PENANAxUat6FTwrz
4.Fe(CN)6 –4在Guanidinium ion的輔助下變成固體結晶。472Please respect copyright.PENANAmv1SHELhnC
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。472Please respect copyright.PENANA8mS9WTJd8j
472Please respect copyright.PENANAR1UMEJPN4O
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。472Please respect copyright.PENANAylVuwGLiYZ
472Please respect copyright.PENANAIBleesOdMC
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。472Please respect copyright.PENANAaZTGOuManO
472Please respect copyright.PENANAmTA77p2d2Y
(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。472Please respect copyright.PENANACdSQfdR3AJ
472Please respect copyright.PENANARJI0adtH40
472Please respect copyright.PENANAq9IhlizOFz
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。472Please respect copyright.PENANAXuGXdBoxdm
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。472Please respect copyright.PENANAwOXJvVsuxG
472Please respect copyright.PENANAUFeT59T4TE
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。472Please respect copyright.PENANAj7vMm92Xkw
472Please respect copyright.PENANA7KFQUcSycf
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/toc472Please respect copyright.PENANA4dVAIv9h9O
472Please respect copyright.PENANA70vuBRGjcd
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。472Please respect copyright.PENANAuyfUDQaAqk
472Please respect copyright.PENANAxpVogx6oE7
Link:472Please respect copyright.PENANAjzfv7bM10y
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio472Please respect copyright.PENANAZAvLCX8AIZ
472Please respect copyright.PENANA2n5qazuUBc
472Please respect copyright.PENANA7RNeFubv2M
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。472Please respect copyright.PENANAGJHD1H9F0J
472Please respect copyright.PENANAkkpEGrH7X1
Ref1:https://science.sciencemag.org/content/early/2020/09/09/science.abd6749472Please respect copyright.PENANAV0tqP1Bes3
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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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