I agree with this 100% On Sun, Sep 17, 2017 at 7:14 AM, Michael MacCracken <[email protected]> wrote:
> A problem at present is that present high-voltage/alternating current > distribution lines mean that low-cost transmission of electricity is > limited to a few hundred miles, so one would have to disperse DAC. If > instead there were large-scale high-voltage/direct current distribution > lines (see MacDonald et al., Nature, January 2016), then there could be > long distance, low-cost transmission over large distances and one would > have a much better likelihood of having access to any stranded energy (from > wind, solar, geothermal, nuclear, etc.), all while having DAC located where > it would be optimally able to store the captured carbon. Just another > reason, among many, for having large-scale HV/DC networks across the > world's continents. > > Mike MacCracken > > On 9/17/17 10:50 AM, Hawkins, Dave wrote: > > Using stranded renewable energy for DAC is an interesting idea. Question > is what energy resource will be used during periods when there is no > surplus RE? If DAC does not run 24/7 its costs go up. If DAC uses RE to run > 24/7, that requires a larger RE system with associated stranding. If DAC > uses something other than RE, what is it? Ideally, we would have an > economically dispatchable zero-carbon resource. > This is not an argument against DAC, just an observation on system > complexity. > > Sent from my iPad > > On Sep 17, 2017, at 3:58 AM, Andrew Lockley <[email protected]> > wrote: > > Does anyone have a breakdown of projected input costs for Direct Air > Capture? I'm interested in quantifying the energy component. > > Swanson's law predicts reliable falls in the cost of solar. Without > storage, much peak-time solar could be wasted, unless it's used for > time-insensitive applications like DAC or desalination. > > (I understand Keith's process needs electricity, but Lackner's instead > needs heat.) > > My hypothesis is that DAC could become vastly cheaper, if energy costs > trended down as expected due to Swanson's law, and cheaper still if it > became a way to use this stranded energy. > > I'd welcome thoughts, data, projections and comments. > > Thanks > > Andrew Lockley > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > -- CONFIDENTIAL INFORMATION: This email message and all attachments contain confidential and privileged information that are for the sole use of the intended recipients, which if appropriate applies under the terms of the non-disclosure agreement between the parties. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
