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- Path: sparky!uunet!news.claremont.edu!nntp-server.caltech.edu!SOL1.GPS.CALTECH.EDU!CARL
- From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
- Newsgroups: sci.energy
- Subject: Re: Why not 120 VDC ? Why invert?
- Date: 25 Jan 1993 07:49:57 GMT
- Organization: HST Wide Field/Planetary Camera
- Lines: 48
- Distribution: world
- Message-ID: <1k0635INNrkq@gap.caltech.edu>
- References: <1993Jan23.000753.14523@michael.apple.com> <1jr751INN16a@gap.caltech.edu>,<1993Jan25.014943.1904@michael.apple.com>
- Reply-To: carl@SOL1.GPS.CALTECH.EDU
- NNTP-Posting-Host: sol1.gps.caltech.edu
-
- In article <1993Jan25.014943.1904@michael.apple.com>, ems@michael.apple.com (E. Michael Smith) writes:
- >>True. However, if you care anything at all about energy efficiency, you don't
- >>use resistive heat sources.
- >
- >Blanket statements don't always hold ... speaking of which, what
- >non-resistive electric blankets are you aware of? ;-)
- >
- >There ARE places where resistive heat continues to make sense...
-
- Electric blankets (except, perhaps, in hospitals) don't fall into one of those
- places. Maybe an electric blanket is useful when treating someone for
- hypothermia. For any application where the person using the blanket is capable
- of generating heat, other alternatives work equally well. For moderate (i.e.,
- above -20 degrees F) conditions, simple wool blankets are quite useful (you
- might need to use a few of them, but they work). For lower temperatures, a
- blanket with an aluminum core works quite well.
-
- Jus how is it that you, known, unless I'm confusing you with someone else, for
- favoring energy conservation, are now advocating electric blankets in
- situations where they're not required?
-
- >Neither my HVAC unit nor my table saw have a synchronous motor.
- >Nor do my clocks, come to think of it .. wonders of the
- >electronic age ...
-
- Most electric clocks still depend on supply frequency. If you've got a digital
- clock, run it on batteries for a day and see how it does.
- >>Switching
- >>to DC means you've probably got to replace your refrigerator, your vacuum
- >>cleaner, your television set, your stereo....
- >
- >Um,the original posting stated clearly that I was looking at a mixed
- >mode system. (In particular, I stated that an inverter would be
- >needed for electronics, misc. electrical outlest {like for the vac}
- >and the refridgerator).
-
- So you're going to run TWO sets of wires throughout your home, one for AC and
- one for DC? Once you've committed to the expense of having an inverter in the
- first place, the cost of increasing the capacity of the unit under
- consideration is relatively small.
- --------------------------------------------------------------------------------
- Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL
-
- Disclaimer: Hey, I understand VAXen and VMS. That's what I get paid for. My
- understanding of astronomy is purely at the amateur level (or below). So
- unless what I'm saying is directly related to VAX/VMS, don't hold me or my
- organization responsible for it. If it IS related to VAX/VMS, you can try to
- hold me responsible for it, but my organization had nothing to do with it.
-