tag:blogger.com,1999:blog-29370135.post1582939901267224551..comments2024-03-28T06:13:08.825+00:00Comments on Sustainable Energy author Ireland (SEAI): EEstor and the Holy Grail UltracapacitorTony McGinleyhttp://www.blogger.com/profile/04483400946840035707noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-29370135.post-86485987338608685082009-12-11T21:47:57.217+00:002009-12-11T21:47:57.217+00:00But u can use a grid of these supercaps which can ...But u can use a grid of these supercaps which can be charched slowly and then give there energy when someone wants to "fill up" the car. The grid needs to be big enough offcourse to handle a lot of traffic, but it can be done.<br /><br />Everyone will leave the house with a full "tank" and with a 250/300 mile radius charging the car during a trip will become a lot less necessary. <br /><br />How many times has it happened that you emptied your car in one trip?<br /><br />Can't remember the last time it happened to me.Anonymoushttps://www.blogger.com/profile/04021195450182858059noreply@blogger.comtag:blogger.com,1999:blog-29370135.post-34576122929118380772009-11-03T19:16:12.621+00:002009-11-03T19:16:12.621+00:00Tony, whether the ultracapacitors every materializ...Tony, whether the ultracapacitors every materialize as cheap units for small consumer electronics remains to be seen, but they will not provide the dream of a quick refill that you envisage. The problem is common to all electric cars:<br />Petrol has an energy denisty of about 10kWh/kg ~ 12kWh/litre.<br />A 60 litre fuel tank will hold 800kWh of energy, which is approximately 3GJoules.<br />Say a refill takes 5 minutes=300seconds (a quick coffee!).<br />The energy flux is now 3GJ/300s=10MW !!<br />The problem is not whether the battery can hold the charge (although this is an issue) but that the infrastruture to provide the flow of energy is very significant. That's why I don't think people will willing give up liquid fuels for transport!Unknownhttps://www.blogger.com/profile/16310185564459387598noreply@blogger.com