雪櫃、冷氣機、水煲等等各電器不時都會散發出熱力。710Please respect copyright.PENANAgK1GTnfL56
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。710Please respect copyright.PENANA97dSq7bODL710Please respect copyright.PENANAVAzdjrJbTr
710Please respect copyright.PENANAH0cmtFA5L3
(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。710Please respect copyright.PENANAeDxUstGe5o710Please respect copyright.PENANASPumuAjL4X
710Please respect copyright.PENANACFdsuYzEDU
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。710Please respect copyright.PENANAxCylyyNzcR
710Please respect copyright.PENANAsMsYdC9aaZ
(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。710Please respect copyright.PENANAueMPZwEhXy
710Please respect copyright.PENANAaNRZl5W9V3
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。710Please respect copyright.PENANA38Kfam2oPS710Please respect copyright.PENANA8DWeyHovFm
710Please respect copyright.PENANA8bWoPczkEW
選用Fe(CN)6 –4的原因基於其兩種特質。710Please respect copyright.PENANAkEWxPVuGir
710Please respect copyright.PENANAYVRUB6Anwd
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。710Please respect copyright.PENANAcDANOqpR1V
710Please respect copyright.PENANAGcQhde3H3c
2.它遇熱的時候會放出電子並成為Fe(CN)6 –3。710Please respect copyright.PENANAv8jDQvg42U
710Please respect copyright.PENANAJFObNIpFk3
(圖4)以下就是利用熱力發電的精髓要點。710Please respect copyright.PENANATzKsZfKIiO710Please respect copyright.PENANAHnLex0KBTy
710Please respect copyright.PENANAxxN0Z57TZ2
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。710Please respect copyright.PENANArIsx5DA75y
710Please respect copyright.PENANAXwvsjp5hc0
2.電子在閉合電路走動,產生電流,讓燈泡發亮。710Please respect copyright.PENANApVzuZGYX86
710Please respect copyright.PENANAcktrK4SxTi
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。710Please respect copyright.PENANAG2swh2DkCk
710Please respect copyright.PENANAyLKZGbu42C
4.Fe(CN)6 –4在Guanidinium ion的輔助下變成固體結晶。710Please respect copyright.PENANAqxiR5yUfjm
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。710Please respect copyright.PENANAORN9Blq2hz
710Please respect copyright.PENANAa4G2PifsZ2
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。710Please respect copyright.PENANA88UFvnysif
710Please respect copyright.PENANALVVgubtROk
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。710Please respect copyright.PENANAKoy2X5e59t
710Please respect copyright.PENANAAY91GOHPIw
(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。710Please respect copyright.PENANAFLGobxanD5710Please respect copyright.PENANA7TErPOGPHQ
710Please respect copyright.PENANATkupXkl4kF
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。710Please respect copyright.PENANAxvmfLEEI3i
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。710Please respect copyright.PENANA6WDCTpPlxE
710Please respect copyright.PENANAtuZ1q5FVmE
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。710Please respect copyright.PENANAYw9Qe9maxy
710Please respect copyright.PENANAFeEPU5LWTC
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/toc710Please respect copyright.PENANAjZYNyOXecq
710Please respect copyright.PENANAaMcRbQ90fM
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。710Please respect copyright.PENANApLaIrQtfkH
710Please respect copyright.PENANA0nbiiqH3LH
Link:710Please respect copyright.PENANAFnVuUu7UZa
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio710Please respect copyright.PENANAW2yXR2xFE6
710Please respect copyright.PENANAjo8qCT4SD6
710Please respect copyright.PENANAjG8gJbHgur
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。710Please respect copyright.PENANArFe02Lzc4E
710Please respect copyright.PENANATHW4mCEN9v
Ref1:https://science.sciencemag.org/content/early/2020/09/09/science.abd6749710Please respect copyright.PENANACKi4Y5uUZm
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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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