home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.energy
- Path: sparky!uunet!stanford.edu!leland.Stanford.EDU!leland.Stanford.EDU!ledwards
- From: ledwards@leland.Stanford.EDU (Laurence James Edwards)
- Subject: Re: steam electric hybrid ...
- Message-ID: <1992Nov20.231821.5188@leland.Stanford.EDU>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: DSG, Stanford University, CA 94305, USA
- References: <1992Nov20.182634.18984@michael.apple.com>
- Date: Fri, 20 Nov 92 23:18:21 GMT
- Lines: 37
-
- In article <1992Nov20.182634.18984@michael.apple.com>, ems@michael.apple.com (E. Michael Smith) writes:
- |> Thinking a bit more about a steam/electric hybrid ...
- |>
- |> How big would a steam turbine and generator be for, say 10-15 kW?
- |>
- |> I would expect it to be far smaller than the mass of batteries
- |> it would replace in a pure electric car.
- |>
- |> [...]
- |>
- |> Efficiency? Fuel being burned external to the boiler will burn cleaner,
- |> but do you loose too much energy in the boiler/turbine/generator/motor,
- |> and occasionally battery charge/discharge, cycle? Would CAFE kill it?
- |> Given that commercial power steam plants can get to very high efficiencies
- |> I have trouble believing that this is a killer... but maybe it would
- |> cost too much to make small plant that efficient?
- |>
- |> [...]
- |>
- |> At the scale of 10 kW, which electric generating process is most
- |> efficient, clean and least costly? Steam turbine, fuel cell, or ???
- |>
- |> Maybe I'm going off the deep end on this, but the idea of three
- |> gallon size objects under the hood (boiler, turbine, generator)
- |> in exchange for 1500 lbs of batteries, providing an unlimited
- |> range with very low smog production is rather appealing ...
- |>
- |> I think it even solves the condenser problem, since at the scale
- |> of 10 kW, I'd expect the condenser to be on the same order of size
- |> as a present IC engine radiator...
-
- Yes, I was going to followup with exactly such a suggestion after I posted
- about steam/electric motor combos, but I wasn't sure about the size & weight of
- the steam plant and efficiency in comparison to batteries. Your analysis makes
- it look good, anybody else care to comment?
-
- Larry Edwards
-