D_Alex

24 ms·

211.
by D_Alex 7y ago
That would be great, my "anon" email is in my profile.
212.
by D_Alex 7y ago
>Per capita per year, the US consumes 13.0 MWh of electricity and 436.6 gallons of gasoline. With ~132k BTU of energy per gallon, that's 16.9 MWh. >Let's say electric cars are 50% more efficient in terms of energy consumptio
213.
by D_Alex 7y ago
Replace, as far as practicable, with fast trains and maybe Hyperloops.
214.
by D_Alex 7y ago
>The point of that is not to capture the carbon but to utilize it as fuel. >If you are capturing carbon, you might as well do it in a form where you can actually utilize it for fuel. Do you understand that the Prometheus proposes to f
215.
by D_Alex 7y ago
I have reviewed the original paper which from which the "$94-$232" estimate is obtained. You can find it here: https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3 My comments are as follows: 1. Obv
216.
by D_Alex 7y ago
>Easier initially... Then start with point sources initially. Considering a good portion of transportation and basically all of the heating can be replaced by electricity directly, you will not need to go beyond point sources anyway.
217.
by D_Alex 7y ago
>You are missing the point; this is a fuel production system that effectively removes the need to capture carbon No... the first step in the proposed process is to capture the CO2 from the air, what I describe in point 6 of my comment. &
218.
by D_Alex 7y ago
>The current cost of carbon capture is about $120 per ton I don't know where you got this from (citation?), but I am sure this is not the cost of capturing CO2 from the atmosphere via "technology" (trees - arguably yes).
219.
by D_Alex 7y ago
>Most of the skepticism about CO2 removal from the air is focused on "carbon sequestration and storage" or CSS, which is mitigation of emissions from fossil fuel by putting CO2 into the ground That is false! Most of the skeptic
220.
by D_Alex 7y ago
I wrote the comment below in response to another article, but it is applicable here. I should note that the technology to convert CO2 to say hydrocarbons is well known (and my current work is on making it economically interesting), my issue
221.
by D_Alex 7y ago
Hi Rob. Why bother trying to extract CO2 out of "thin air" when there are far more concentrated sources available, for example exhaust of existing power plants (100,000 ppm CO2, instead of 400 ppm)? There are even streams of pure
222.
by D_Alex 7y ago
If I were a citizen, I would also prefer to be armed. I am a good guy, and know what is right and what is wrong. Unlike my idiot Maduro-supporting neighbour with his stupid, socialist ideas - and violent tendencies! I would prefer him to be
223.
by D_Alex 7y ago
What are you trying to say? Things would be better if "the population" had guns?
224.
by D_Alex 7y ago
Excellent points. Other parameters missing: - Vacancy rate! - Leasing costs (or value of your own time) Annual cost should include: "normal" maintenance, repairs, insurances, renovation sinking fund, taxes, rates, strata fees if a
225.
by D_Alex 8y ago
Coal should be the starting point. >Let their money burn. Unfortunately, it will not be just "their money" if the economy has a hard time weaning itself off oil and gas. It will be everybody's money, and lifestyle.
226.
by D_Alex 8y ago
Unfortunately, this analysis fails because you are comparing a 4 seat utility airplane with a 2 seat trainer. A better comparison would be with say the Allegro, $100k, or the Cessna 162, $150 k. Furthermore please note that the article head
227.
by D_Alex 8y ago
I am not sure who would eat better... consider: - the variety of foods available today is far greater, especially in winter - Spices available 1000 years ago were quite limited, today any supermarket will have 100 varieties from all around
228.
by D_Alex 8y ago
In diesel engines the power generated is directly controlled by the amount of fuel delivered - if you want more power, inject more fuel. Unlike most spark ignition engines, there is no throttle valve, you control the stroke of the diesel
229.
by D_Alex 8y ago
This is actually a very bad idea and a complete waste of money which should have been used for other projects. It reminds me of another bad idea, which just will not die - extracting water from air by cooling it. Right now, we have several
230.
by D_Alex 8y ago
True, but an air conditioning system removes multiple kWhrs of heat for each kWhr of electricity. See for example here: http://www.currentforce.com.au/coefficient-of-performance/
231.
by D_Alex 8y ago
Good job on doing the research - let me comment as follows: EIA publishes crude import and export figures directly, see here: https://www.eia.gov/dnav/pet/pet_sum_snd_d_nus_mbblpd_m_cur.... The second line of the
232.
by D_Alex 8y ago
This is complete and utter rubbish. I do not know where you got this from, care to share? The US used to be the worlds largest net importer of crude oil since at least the 1950s, and only recently (2016 or 2017) got overtaken by China. The
233.
by D_Alex 8y ago
That is not correct, cooling uses maybe 20% of the electricity used by the electronics themselves.
234.
by D_Alex 8y ago
You claim the author is cherry-picking, and then you say this: > The marginal cost for natural gas is roughly ~1.8 cents/kWh today (including O&M) I am assuming you worked this out using the Henry Hub prices of circa $2.50/
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by D_Alex 8y ago
>given that boomers are less than 10% of the population Citation needed... I think they gotta be more than 20%.
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by D_Alex 8y ago
Option (4): input from other sensors (altitude, climb rate, gyroscope/artificial horizon, pilot actions etc) for a sense check...?
237.
by D_Alex 8y ago
Yes... and furthermore: it seems that a key problem was: > MCAS can make huge nose down changes This, to me, is really odd. All the hardware changes could not, AFAICT, require that. It seems really dumb that the MCAS system was made to b
238.
by D_Alex 8y ago
Furthermore, it seems that the MCAS acts by moving the entire horizontal stabiliser... whereas the yoke moves the elevators only. This means the MCAS will always "win" in a metaphorical tug-of-war between the two controls. However
239.
by D_Alex 8y ago
That ignores the productivity of these people. Generally speaking the BBC list seems to be quite silly because of this fact.
240.
by D_Alex 8y ago
>Congratulations, you have banned Chinese food. No, I have not. Stop being silly.

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