Sat, 25 May 2013 01:30:37 +0100 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16064#Comment_16064 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16064#Comment_16064 Wed, 12 Mar 2008 12:34:36 +0000 renewablejohn
I would not recommend a wet steam boiler system to anybody who is not a steam engineer as the consequences if you get it wrong are explosive to say the least. A thermal oil steam evaporator is a safer means of generating steam and certain boilers can be used with thermal oil instead of water.

Skywalker

My compound steam engines are only max 15% efficient however I am in contact with a geo thermal steam energy manufacturer with an engine reported at 60% efficiency. If this is the case then what dickster wants to do will be relatively easy.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16067#Comment_16067 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16067#Comment_16067 Wed, 12 Mar 2008 12:55:16 +0000 Paul in Montreal Posted By: renewablejohnI am in contact with a geo thermal steam energy manufacturer with an engine reported at 60% efficiency.

This sounds somewhat unlikely - unless the geothermal steam is coming out of the ground at around 1600C. See http://en.wikipedia.org/wiki/Heat_Engine#Efficiency - there's a geothermal powerstation cited in Italy that has a measured efficiency of 16% which compares closely with the endoreversible figure of 17.8% for the temperatures used. Coal-fired powerstations are around 40% maximum for a steam temperature of 565C.

Paul in Montreal.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16089#Comment_16089 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16089#Comment_16089 Wed, 12 Mar 2008 15:00:50 +0000 renewablejohn
I am also a sceptic but knowing the industry where the technology has come from that sort of efficiency is not exceptional the proof will come on a live steam trial.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16092#Comment_16092 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16092#Comment_16092 Wed, 12 Mar 2008 15:31:47 +0000 Paul in Montreal
Paul in Montreal.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16102#Comment_16102 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16102#Comment_16102 Wed, 12 Mar 2008 17:10:03 +0000 renewablejohn
No it is purely engine efficiency thats why I am so interested as it could quadruple my electrical output for the same amount of steam]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16110#Comment_16110 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16110#Comment_16110 Wed, 12 Mar 2008 18:00:39 +0000 Paul in Montreal
Paul in Montreal.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16112#Comment_16112 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=16112#Comment_16112 Wed, 12 Mar 2008 18:13:37 +0000 renewablejohn
I let you know when I get the test results]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=19649#Comment_19649 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=19649#Comment_19649 Wed, 30 Apr 2008 00:51:55 +0100 cobbop Thermodynamics rules the waves.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=19652#Comment_19652 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=19652#Comment_19652 Wed, 30 Apr 2008 08:49:54 +0100 joe.e But if you wanted to look into steam from wood, you could try having a look at http://www.steamboat.org.uk/ which is the Steamboat Association - lots of very knowledgable people building and using steam powered boats. I think all the safety issues around pressure can be resolved without too much difficulty - lots of elderly gents spend their weekends pottering about on lakes and rivers with 200psi boilers steaming away in front of them. If you've got loads of wood, and you had a triple expansion engine hooked up to a good boiler and the whole thing driving an appropriately sized dynamo, you should get some power out of it. By the looks of the size and speed of some of the boats people use they must be getting about 5-10hp, so you can do the sums from there re. output. The only problem being that the idea was to get the heat from your woodburner. I suppose you could replace the woodburner with the firebox for your system, and run the pipework out of the wall to the engine, but the whole thing would start to look like one of those obsessions that begin to dominate your life and get you an unfortunate reputation in the village...
Here's how it's done if you're serious: http://www.asme.org/Communities/History/Landmarks/Marinetype_Tripleexpansion.cfm]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=19657#Comment_19657 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=19657#Comment_19657 Wed, 30 Apr 2008 09:26:04 +0100 joe.e http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=30424#Comment_30424 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=926&Focus=30424#Comment_30424 Sun, 17 Aug 2008 03:55:33 +0100 Monty
http://www.strathsteam.com/page6.html]]>