Re: Solar-hydrogen home power system?

From: Bill Snyder (bsnyder_at_airmail.net)
Date: 10/24/04 

Date: Sun, 24 Oct 2004 09:56:17 -0500

On Sun, 24 Oct 2004 14:36:05 +0000 (UTC), "Franz Heymann"
<notfranz.heymann@btopenworld.com> wrote:

>
>"Thomas Lee Elifritz" <crackpots@everywhere.net> wrote in message
>news:417BAD9C.DD6ACC1@everywhere.net...
>> October 24, 2004
>>
>> Franz Heymann wrote:
>>
>> > You have signally failed to address that point.
>>
>> Where have you been. We have destroyed Don's exergy arguments over
>and
>> over again on these newsgroups. His claims are without merit in
>> transportation applications.
>
>That is a matter of flawed opinion.
>
>> From an entropy standpoint, electrolysis, catalysis and
>electrocatalysis
>> (and even photolysis) are some of the most efficient energy
>conversion
>> processes known.
>
>But ultimately you end up with hydrogen whose energy can only be
>utilised with around 30% efficiency. If you had driven a morot
>directly with the electrical power, you could have obtained around 80%
>efficiency.
>
>Will it never sink in with you that it is an inexcusable waste to
>exchange high grade electrical energy for low grade thermal energy?

But driving a motor directly is not an available option, unless you
have in mind some sort of flywheel-storage. The context is a home PV
system, providing output surplus to immediate requirements _in the
daytime_. It hardly seems less of an "inexcusable waste" to simply
discard the excess electrical energy than to store/recover it by a
method that's only 30% efficient. 

-- 
Bill Snyder   [This space unintentionally left blank.]

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