🚀 go-pugleaf

Don Libby wrote in message <393E730F.2F71D6CD@tds.net>...
>Tim O'Flaherty wrote:
>>
>> Greig Ebeling wrote in message <393e22ee.49400070@news.bigpond.com>...
>> >On Wed, 07 Jun 2000 02:10:05 GMT, kinsler@frognet.net (Mark Kinsler)
>> >wrote:
>> >
>> >>Greig Ebeling <greige@bigpond.com> wrote:
>>
>> Yet wind power schemes are
>> >theoretically able to produce no more than a few percent of our power
>> >before becoming uneconomical.
>>
>> What "theory" are you refering to?  Do you have references and data to
back
>> up this assertion?  What specifically is  "a few percent"  ?  2%,  5%,
80%
>> ?
>
>"The levels of electricity generation from intermittent sources (for
>example from wind turbines or photovoltaic arrays) that can be accepted
>in a supply system depend strongly on the nature of the system and the
>measures that manage time variations in load.  Typical percentages of
>wind or solar shares in systems without storage are about 20% for grid
>systems and up to 50% for large systems with reservoir based hydro or
>time zone variations of loads (Sorensen, 1981, 1987; Grubb and Meyer,
>1993; Kelly and Weinberg, 1993).
>
>"Short-term storage will ease regulation and possibly improve power
>quality, but only intermediate and long-term storage will allow large
>systems to have shares of variable renewable-energy sources that
>significantly exceed 50% (Jensen and Sorensen, 1984).
>
>"The SUTIL simulation model (Kelly and Weinberg, 1993) calculates the
>average cost of electrric generation as the result of an hour-by-hour
>simulation that takes into account demand, the variable output of
>intermittent renewable equipment, the load-leveling capabilities of
>hydroelectric facilities, and the dispatching characteristics of
>alternative thermal-electric plants.  Results of a SUTIL simulation of
>10 alternative portfolios for a hypthetical utility--based on assumed
>values of the demand load profile, insolation, fuel costs, and capital
>costs--are shown in Figure 19-4.  For this set of alternative utility
>investment portfolios...  the fraction of electrical energy provided by
>intermittents can rise up to about 30%, without the use of new
>electrical storage technology, before costs start rising significantly."


Thanks Don.
Long before we get to 20% the Danes and whoever else is smart enough to get
into this market will be begging researchers to take their money for bulk
energy storage research.  In fact I would be surprised if they aren't
already looking into the possibilities.  If I was a gambler I would bet on
an economical solution to this before the solution, or resolution if you
will, of the nuke waste quandary.

--
Windpower, over 13500 mw sold.

Assuming a 20% Capacity factor,
that's over 28,955 1980 F-100 equivalents !!

Regards , Tim O'Flaherty