Hi Steven, Are you saying that 304 SS is suitable with seawater? Yikes! I'll check, but I don't think that that's an ASME Standard. (maybe it's super-thick, eh?) Mark
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Stephen Maupin Sent: Saturday, August 07, 2010 11:08 AM To: Discussion of biomass pyrolysis and gasification Subject: Re: [Gasification] Can use some help with stoves I suggest using a gasifier with a ASME steam jacket . Our 400 kW system, manufactured by MidSouth Maintenance in Memphis has the capacity of distilling 20,000 gallons per day with waste heat while allowing the gas to be used to generate electric power or Kalina Cycle refrigeration. diversifiedtn.com/renewable energy/youtube. The steam jacket is 304SS and will handle seawater or waste water effluent.The refrigerated condenser/heat exchanger accelerates the process using heated lithium bromide or ammonia closed loop with flare or waste exhaust engine heat. --- On Sat, 8/7/10, David G. LeVine <[email protected]> wrote: From: David G. LeVine <[email protected]> Subject: Re: [Gasification] Can use some help with stoves To: "Discussion of biomass pyrolysis and gasification" <[email protected]> Date: Saturday, August 7, 2010, 12:17 PM On 08/01/2010 01:15 AM, Ken Gotberg wrote: > <snip> > Water takes on the order of 2.2 Mega Joules/liter to boil at 100 > degrees Celsius and more with the salt present. This mixture can take > up to 130 0C to boil and the options available to me as I > see them are: 1. rocket stove, 2. gasification stove, 3. charcoal > stove, 4. solar thermal concentrator, etc. The 130 0C is > no problem for the stoves, but I'm curious about what the maximum > efficiency of any of these is. It seems to me that the rocket or > gasification would have about the same efficiency, but perhaps I'm > wrong. A charcoal stove may be useful in some situations, but > probably not in most. And I suppose reverses osmosis and flash > boiling etc. are also possible, but seem pretty sophisticated for > local people? > Ken, Let's ask some questions: 1. Is this for use in the Philippines? I will assume so. 2. Aren't the Philippines relatively high humidity and warm? 3. How many MJ/l would it take to condense the water from the air? My gut feel is that you will need to reject 2.26 MJ/L and cool it from 30° C to 20° C for it to be useful, which means 420 KJ/L or 2.7 MJ/L. To boil water will take 2.26 MJ/L and to to raise it to 130° C from 30° C will take 4.2 MJ/L. So heating it seems to need 6.5 MJ/L, then returning it to 20° C will take rejection of of about 7 MJ/L. 4. Might it be worth looking at another technology to pull the water from the air? We are talking putting in about 2 KWH/L and rejecting a bit more heat for 1 liter of water, 4 liters (not an unreasonable amount for a 70 KG man who works 1 hour per day) means needing 8 KWH/day per person who only works 1 hour per day. Working 8 hours/day in a warm climate means probably 16-32 KWH/day/person. 5. We receive an average of 164 W/M^2 per day from the sun, this implies about 100 meters^2/person just for water at 100% efficiency, and solar collection is well under 100% efficiency. Did I miss something here? Biomass for a family of four would to be 400 m^2 per day to supply water if 100% of the sunlight is harvested, and plants use a narrow band of energy, so collection is less than 100% efficient. It sounds like a poor choice, there may be a better way to spend the energy. _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org
