tag:blogger.com,1999:blog-13900197.post115368675352210126..comments2023-10-15T05:20:00.675-06:00Comments on Entropy Production: Hydrogen's Death Knell?Robert McLeodhttp://www.blogger.com/profile/05270962906437456350noreply@blogger.comBlogger10125tag:blogger.com,1999:blog-13900197.post-46585794212170828102007-05-05T12:08:00.000-06:002007-05-05T12:08:00.000-06:00This comment has been removed by a blog administrator.Omar Cruzhttps://www.blogger.com/profile/02944147038071391777noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-27027950263190967402007-04-16T19:57:00.000-06:002007-04-16T19:57:00.000-06:00This comment has been removed by a blog administrator.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-13900197.post-69651563262737310852006-12-27T07:52:00.000-07:002006-12-27T07:52:00.000-07:00Overall, the hydrogen economy looks pretty bad. To...Overall, the hydrogen economy looks pretty bad. Too many inefficiencies. Furthermore, hydrogen leakage (which will be substantial) will cause significant atmospheric impacts. The one really good aspect is that in principle (though maybe not in practice) it offers a way to store energy from intermittent renewable energy resources. This could enable a great expansion of the application of such energy sources. <br /> The electric car has been widely touted as environmentally beneficial, but when you look at the whole end-to-end system: mine the coal, transport the coal, burn the coal, have power lines all over the landscape, deliver the power, reprocess acids and metals in batteries, etc. it may not look so good.<br /> The problem with most of these discussions is that they center on how we are going to USE ENERGY - whereas our really big problem is providing the ENERGY SOURCE. In the longer run, this may depend on technologies that appear very futuristic at this juncture (fusion, solar power from space, ...) but there seems to be a rather extended intermediate run ahead of us where none of these will be available. And in order to extend that intermediate run period to give us enough time to develop long term solutions, we must drastically cut usage and improve efficiency wherever we can. I note that General Motors demands the right to make behemoths with V8 engines and claims that we will lose the auto business to Japan if we don't. I have news for GM: they have already lost.drdrapphttps://www.blogger.com/profile/11830446682976836299noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-21458496146605936712006-10-25T15:42:00.000-06:002006-10-25T15:42:00.000-06:00... and yet you hear about the Hydrogen Economy as...... and yet you hear about the Hydrogen Economy as if it were a sure thing... :-(<br /><br />The only compelling thing about the hydrogen economy is that it is portrayed as if you are just switching from one liquid fuel to another, thus you can go about your life as always. <br /><br />That and the supposition that it is the only way to utilize wind energy efficiently. This latter argument is a direct extrapolation of how we use electricity today way into the future. But the truth is that using electricity in a more flexible and intelligent manner, would save a tremendous amount of money (even in a business-as-usual scenario) while enabling a much greater share of renewable energy at the same time.<br /><br />Robert, you touched upon thermal storage in another post. Thermal storage is great, because 1) we use a lot of thermal energy, either as heating or cooling, and 2) you can store a lot of it very cheap!Anonymoushttps://www.blogger.com/profile/14003924904608452303noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-37302988079866417872006-10-07T13:57:00.000-06:002006-10-07T13:57:00.000-06:00Pls review my web page
http://myweb.tiscali.co.uk...Pls review my web page <br />http://myweb.tiscali.co.uk/h2energy4all<br />Note all 50 / 60 Hz diesel generators run at 1500 rpm - makes it easy to convert the injectors to diesel fuel (dun deal). No H2 storage problems just sell the renewable electrical energy and use oil as a lubricant in very small ammounts.Robin Hood H20https://www.blogger.com/profile/08176232407999963418noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-1156121057477927412006-08-20T18:44:00.000-06:002006-08-20T18:44:00.000-06:00Certainly hydrogen has a superior mass energy dens...Certainly hydrogen has a superior mass energy density when compared to electric vehicles − neg on the volume energy density. When comparing the energy density of batteries to hydrogen fuel cells one needs to add the weight of the tank and fuel cell itself to that of the hydrogen. Batteries stand alone in the energy density accounting. Both still need an electric motor. <BR/><BR/>In terms of power density I think that vehicles like the Tesla or Eliica have conclusively shown that they have the edge.Robert McLeodhttps://www.blogger.com/profile/05270962906437456350noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-1156114248047894432006-08-20T16:50:00.000-06:002006-08-20T16:50:00.000-06:00Isn't it correct that hydrogen fuel cells (more sp...Isn't it correct that hydrogen fuel cells (more specifically: their associated storage tanks) would provide higher energy density than batteries?<BR/><BR/>If they don't, then it's indeed hard to see much future for this technology.<BR/><BR/>I did see something recently about railroad interest in hydrogen fuel-cell-powered locomotives, which doesn't appear to be a PR-driven project.David Fosterhttps://www.blogger.com/profile/15464681514800720063noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-1154693121322740642006-08-04T06:05:00.000-06:002006-08-04T06:05:00.000-06:00Heh heh heh. Vindicated.Heh heh heh. <A HREF="http://ergosphere.blogspot.com/2005/07/why-hydrogen-is-no-route-to-renewables.html" REL="nofollow">Vindicated</A>.Engineer-Poethttps://www.blogger.com/profile/06420685176098522332noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-1154022151963836562006-07-27T11:42:00.000-06:002006-07-27T11:42:00.000-06:00Oh, also, "Anything You Can Do, I Can Do Better" i...Oh, also, "Anything You Can Do, I Can Do Better" is from <I>Annie Get Your Gun</I>, not <I>Mary Poppins</I>. *g*Auroshttps://www.blogger.com/profile/13717088139593020249noreply@blogger.comtag:blogger.com,1999:blog-13900197.post-1154019462265133032006-07-27T10:57:00.000-06:002006-07-27T10:57:00.000-06:00Hello there,A friend of mine was telling me about ...Hello there,<BR/><BR/>A friend of mine was telling me about the Li-Ion fire hazard issue, and I remembered having heard that the battery technologies have improved significantly since '99, so I went looking for info, and found <A HREF="http://odograph.com/?p=628" REL="nofollow">this page</A>, where you remarked that this problem had been solved by changing the cathode material...<BR/><BR/>Any chance you could expand on the details of how this problem was solved or ameliorated?Auroshttps://www.blogger.com/profile/13717088139593020249noreply@blogger.com