more poking around this weekend about blowers surfaced a new type i hadn't seen before. these are a new gen of premix boiler blower that commonly go to 11 or so inches vac. they are also sized appropriately for our gasifier flow rate needs, and with lots of other fabulous things that might make this the grail we've rooting around for. cheap too. cheaper than i can make them myself. so woohoo!
i think we have a new winner. i ordered some samples to test out. the basic images and doc on the one we are getting to test is here: http://www.gekgasifier.com/forums/showthread.php?p=1696#post1696 they can manufacture special 12vdc ones too. hopefully they are as good as the doc suggests. we'll see. the main company that developed these is ebm-pabst in germany. see here: http://www.ebmpapst.co.uk/pages/content.asp?s_17,ss_51,p_2 they have lots of them. all ebm pabst does is make blowers. look at the 3d curved centrifugal blades they have going. very fancy. they've taken things a couple steps beyond where our musings left off. the details: it seems that older one or two speed boiler systems are being replaced with infinite speed variation units for better load tracking and efficiency. these new boilers have also gone to premix systems where the fuel/air is blown in already mixed, and don't rely on late in situ mixing in the combustion chamber. this makes a cleaner burn and smaller combustion envelope, which makes the whole boiler unit smaller. the ability to premix fuel/air on a gasifier flare helps many things. this is what we do with the ejector venturi and swirl burner on the gek. such is not usually possible with a fan as the flame backs up into the housing and makes a very inefficient turbine (before melting the motor). seems these are designed to not back up flame into the housing. extremely helpful. hope it works with woodgas too. these new blowers are also usually done with brushless dc, with pwm control built in. the motors are very high efficiency and quiet. they advertise power comsumption in the 1/3-1/2 of what previous gen things do. the performance to amp specs at the link above suggest they are not blowing smoke either. you can read all about this HOT NEW BOILER TECH in the boiler industry white papers and news releases at links below. http://hpac.com/heating/brushless-direct-current-blowers-0110/ http://www.appliancemagazine.com/editorial.php?article=1716&zone=1&first=1 http://www.google.com/url?sa=t&source=web&cd=5&ved=0CEAQFjAE&url=http%3A%2F%2Fwww.ebmpapst.us%2Ftechdocs%2FPremix%2520Gas%2520Blowers.pdf&rct=j&q=premix%20blower%20boiler&ei=_n7zTOC7HYGcsQOFx-maAQ&usg=AFQjCNGl7WGbojNEoK22yh5yGeE2uUDrrQ&sig2=sOnNlBeuiYGHUxHemzmCMQ&cad=rja who ever knew fans could be so interesting! jim -- ------------------------------------------------------------------------------ Jim Mason Website: http://www.whatiamupto.com Current Projects: - Gasifier Experimenters Kit (the GEK): http://www.gekgasifier.com - Escape from Berkeley alt fuels vehicle race: www.escapefromberkeley.com - ALL Power Labs on Twitter: http://twitter.com/allpowerlabs - Shipyard Announce list: http://lists.spaceship.com/listinfo.cgi/icp-spaceship.com _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
