Lawrence Winiarski wrote > Why bother with battery powered HVAC for scheduled service vehicles? > If you know the schedule, just preheat/precool some thermal mass. > Lots of mass in the batteries themselves and you can supplement that with > water.
In the dark ages I did just that with lead-acid batteries as my thermal storage. Before my ComutaVan, I drove a scratch-built EV designed by Wayne Goldman (also intended for the USPS). The battery box was a roll-out central tunnel, with fourteen 6v golf cart batteries (about 1000 lbs) and 2" of styrafoam insulation. In winter, a fan blew air through the battery box and into the interior for heat. When the temperature outside was 20 dg.F, the air coming into the cab was about 60 deg.F -- not exactly warm but adequate. I also had a small heater (actually a hair dryer) for defrosting the windshield. In summer, the lid of the box was removed, so the fan cooled the batteries instead of heating the interior. -- Excellence does not require perfection. -- Henry James But it *does* require attention to detail! -- Lee Hart -- Lee A. Hart https://www.sunrise-ev.com _______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
