Re: Ceramic heating element efficiency - Infrared?

[Lock Hughes <lockhughes@yahoo.com>]

Hello Peter and EV listers

 --- Peter VanDerWal <peterv@peoplepc.com> wrote: 
> The heating elements convert electricity into heat at nearly 100%. 
>  Transfering that heat to the air is somewhat less.
> As in all things the more changes/stages you go through the lower
> your efficiency, the hot water system will require more energy imput
> for the same amount of heated air.
> Ceramic: electricity->hot element->heat air
> 
> Water: electricity->hot element->heat water->move water->heat 
> exchanger->heat air

     What about infrared electric?  

electricity->hot element->clothing/skin ?

     My own interest is in a 40 passenger EV ferryboat service.  I'm
curious about infrared as an option, rather than heating the whole air
volume of the passenger cabin.  Off season (early spring and late fall)
I'd only wish to heat the driver and a *few* passengers... 

     I figured the heating could be "zoned" by turning on/off several
overhead electric infrareds, as needed.

     Because the energy storage assumes a full boat, while the
offseasons are always much less than full, perhaps the surplus capacity
would go into heating (via infrareds, as more efficient/zoned), without
an apparent additional power drain (energy switched from propulsion to
heating)

     The infrared folks claim additional benefits too, like killing
mildews, etc... 

     I'm seeing figured quoted like about 90% efficient and 25,000hrs
before replacement.  Plus, I guess IR is silent if/as no blower needed

Lock
      

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