{"id":8536,"date":"2019-08-30T11:05:02","date_gmt":"2019-08-30T10:05:02","guid":{"rendered":"http:\/\/www.theoillamp.co.uk\/?p=8536"},"modified":"2019-08-30T11:05:02","modified_gmt":"2019-08-30T10:05:02","slug":"one-thing-learnt-week-waste-heat","status":"publish","type":"post","link":"https:\/\/www.theoillamp.co.uk\/?p=8536","title":{"rendered":"One thing we have learnt this week – waste heat"},"content":{"rendered":"

\"IMG_0761\"<\/a>Could waste heat be the solution to our heating needs?\u00a0 One of the biggest problems we face in decarbonising the economy is what to do about how we heat our homes.\u00a0 At the moment we are highly dependent on natural gas.\u00a0 This is a finite resource.\u00a0 Various alternatives are frequently cited.\u00a0 These include hydrogen, which I regard as a complete waste of space and heat pumps which have very significant drawbacks.\u00a0 Search this site for blogs on these alternatives, take a read and see what you think.<\/p>\n

Could one solution be waste heat?\u00a0 There is the beginnings of a quiet revolution in district heating taking place across the UK with some government money as seed corn.\u00a0 In London this week it was announced that the waste heat from the tube is to be used\u00a0 to heat further 450 homes joining 700 odd on an existing network.\u00a0 Anyone who has been on the tube know how hot it is.\u00a0 Its also getting hotter with climate change.\u00a0 There is therefore an increasing incentive for Transport for London to cool it. Rather than pump the heat out into the atmosphere why not collect it?\u00a0\u00a0 The scheme is going to use high efficiency heat exchangers to raise the temperature to 80\u00b0C from 18-28\u00b0C.\u00a0\u00a0 There is possibility that almost 40% of London’s heating needs could be met this way.\u00a0 On big advantage of the scheme is that its the sort of temperatures that gas boilers work at.\u00a0 This means you could use existing radiators and levels of insulation.\u00a0 Of course we need to insulate our houses better, but in the short term this could be very costly and in some cases almost impossible.<\/p>\n

There are other schemes being mooted in Greenwich and using waste heat from Wembley stadium in London.\u00a0 Stoke on Trent seems to be working on a scheme using natural occurring hot water and there is a very interesting scheme closer to home in Edinburgh.\u00a0 I’ve not been able to find many details on this at all, but it seems to involve pumping waste heat during summer into a very large disused mine, then using it in winter.\u00a0 This scheme would be linked with combined heat and power.<\/p>\n

There is one huge problem with district heating.\u00a0 That is it involves digging up the streets on a huge scale.\u00a0 This is not cheap or easy.\u00a0 But for many of us it may be the only solution before the gas runs out and a climate crisis strikes.<\/p>\n

Neil<\/p>\n","protected":false},"excerpt":{"rendered":"

Could waste heat be the solution to our heating needs?\u00a0 One of the biggest problems we face in decarbonising the economy is what to do about how we heat our homes.\u00a0 At the moment we are highly dependent on natural … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[5,17,3,15,4],"tags":[],"class_list":["post-8536","post","type-post","status-publish","format-standard","hentry","category-climate-change","category-one-thing-we-have-learnt-this-week","category-peak-oil","category-practical-low-carbon-living","category-renewables"],"yoast_head":"\nOne thing we have learnt this week - waste heat - The oil lamp - shining God's light on peak oil<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.theoillamp.co.uk\/?p=8536\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.theoillamp.co.uk\/?p=8536\",\"url\":\"https:\/\/www.theoillamp.co.uk\/?p=8536\",\"name\":\"One thing we have learnt this week - 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