On Apr 25, 6:23Â pm, Bret Cahill
aol.com> wrote:>>>>> Assuming it can be made to work the yield from algae is claimed to be
>>>>> 30,000 gallons diesel/acre-year. � This comes out to be 30 kW/acre
>>>>> (24/7/52).
>
>>>>> (This is over 3X the gross income as growing berries so it is
>>>>> probably
>>>>> economical especially considering the quality of the land doesn't
>>>>> matter.)
>
>>>>> Taken along with the 40%% efficiency of a diesel engine, the
>>>>> mechanical
>>>>> work from algae oil is only 12 kW/acre (24/7/52).
>
>>>>> Dish Stirling averages over 120 kW/acre mechanical work (24/7/52).
>
>>>>> Now, to be sure, no one will deny that liquid fuel is often a
>>>>> convenient way to store and transport energy, but even if the
>>>>> electrical energy storage device, i. e., battery, pumped water, etc.,
>>>>> is only 10%% efficient, dish Stirling _still_ beats bio diesel in
>>>>> mech.
>>>>> energy/land use.
>
>>>>> Bret Cahill
>
>>>> Not a useful comparison Bret.
>
>>> Land and capital cost of covering land are always important.
>
>>>> But at least neither one actually works.
>
>>> San Diego Gas & Electric just bought 40,000 Stirlings for the desert.
>>> You might want to tip them off.
>
>> The only thing I've heard about is conventional turbines running off
>> solar thermal. Can you give a reference?
>
>>> Diesel from algae seems likely.
>
>> I don't know. Is it just 5-10 years away, like hot fusion?
>
> This pretty much explains at least the current popularity of solar
> thermal.
>
>> This is
>> 1950's sci-fi that has yet to materialize. Assume the tech; you've
>> still got to get water to the desert.
>
> Dish Stirling has a closed cooling system.
Water for the algae, idiot. You put your algae tanks where the sun
shines most of the time otherwise it isn't worth the trouble.
>
>>>> Give me a functioning Stirling generator and I can charge up the
>>>> electric car off the wast heat from heating and AC right there at my
>>>> house.
>>> That violates the 1st and 2nd law of thermodynamics.
>> Huh?
>
> The efficiency is too low at any rate.
>
Not if it is a Stirling engine. The whole point is running off small
delta-T. It isn't a perpetual motion machine; it just means that the
net efficiency of your heating cooling and refrigeration is increased.
And where's that reference?
-tg
> Bret Cahill
