One thing that never seems to get a mention, is the heating in these
vehicles. Surely the need to heat winscreens and passengers for around
six months in the year adds a considerable penalty to the battery
Or do we have a return to "Esso Blue", with a greenhouse heater :-)
On the plus point, I can see a ready market for all the fuel saving
gimmicks that were on sale years back. The Fuel conditioners can have
the piping replaced with cables so that they become power
conditioners, a comeback for the 0.22uF capacitor masquerading as a
wireless filter unit also, the blurb will be astounding "stop your
miles being eaten away by stray RF interference, fit a miracle
suppressor" Maybe the green felt marker used to draw a ring on the
perimeter of CD's can be poshed into service aroung the charging
Of course the dashboard chargers wil be pushed hard, no one will ever
be at risk ofbeing helplessfrom the power dying again with a pc cell
on the dashboard, the hundred or so uA will "soon" have them zooming
into the distance.
Mind you the true power saving ideas will have been bought up and kept
secret by the power companies........
Business will boom!
On Thu, 27 Jul 2017 03:26:22 +0100, Bill Wright
Last night a bloke who bought a couple of Renault vans which were electric
was complaining that the batteries are on lease and the company is supposed
to replace them when the mileage shows they are wearing out, but he has
found that in warm weather he gets twice the range than in cold weather even
with no heating of any kind. Renault refuse to give home new batteries so
he is going to go to law over it. Personally, I'd just sell the vans to a
local delivery firm and buy some hybrids from Nissan.
This newsgroup posting comes to you directly from...
On 27/07/2017 05:36, Archibald Tarquin Blenkinsopp wrote:
It does... even though the more modern ones have heat pump air con units
to improve the efficiency of heating a bit. Some also allow a storage
preheat facility that allows you to heat the car while its still
connected to the mains. They can presumably do some more with thermal
insulation to assist as well.
I would be interested to know how well their AC systems work though
since some "normal" AC systems can consume 10 BHP or so, and "wasting"
5+ kW on AC seems excessive on cars with less than 25 kWh of total
That doesn't actually make much sense.
How much gain are you expecting in a car?
The AC will have a COP of at least 2 and probably nearer 3 so 5kw is
10+kw of heat extraction.
My conservatory only uses 1600W to cool it and that is 5kW extraction.
There is a lot more solar gain than a car.
Depends on the climate its in... If you take average insolation at say
1kW/m^2 then you could be talking about 4 - 6kW incident on a larger
car's passenger compartment.
(keep in mind auto AC systems are designed for global operation and
hence need to be able to cope with a hot day in Dubai as well as a wet
weekend in Dublin)
The power consumption on my car's AC I believe is quoted at a peak of
about 6kW... that presumably allows for mechanical losses as well though.
One little phrase buried in there ...
"In recent years we have struggled to build enough power stations for
existing users, let alone adding all cars and heating too, for that is
Since when did the plan include switching all heating to electric?
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