sbradford26

7 ms·

31.
by sbradford26 3y ago
So negative cost electricity tends to be a side effect of large thermal power plants that can't ramp down quickly due to a drop in demand. Renewables can typically be turned off relatively easily. Maybe there will be situations that mi
32.
by sbradford26 3y ago
So technically it might be possible to do that. But I don't think the economics would work out for that. Mostly because your cost of hydrogen will then be linked to the cost of electricity coming in. Given the choice between hydrogen w
33.
by sbradford26 3y ago
You covered the most important detail that I think most people skip and that is that hydrogen is just a very inefficient battery if you are utilizing green hydrogen. With the intrinsic inefficiencies of generating green hydrogen and the of
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by sbradford26 3y ago
So fuel cell cars other than one exception that I am aware of only use compressed hydrogen not liquid. Dealing with compressed hydrogen is difficult but manageable, dealing with liquid hydrogen is extremely difficult.
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by sbradford26 3y ago
I believe you can purchase a Toyota Mirai but it doesn't make much sense to. On lease you get $15000 in free hydrogen to be used in 3 years. If you purchase it outright you get the same 15k but you get 6 years to use that. But your res
36.
by sbradford26 3y ago
If you scroll down they have a breakdown, but that big increase in expenses is that a single working adult with a child would need to pay for childcare. If there is 2 adults and only 1 working it is assumed the non working adult would handl
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by sbradford26 3y ago
>The FMR estimates include utility costs and vary depending on the number of bedrooms in each unit, from zero to four bedrooms. We assumed that a one adult family would rent a single occupancy unit(zero bedrooms) for an individual adul
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by sbradford26 3y ago
I will say that they would also be a player in many of the metals utilized in hydrogen fuel cells as well.
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by sbradford26 3y ago
I have major issues with inductive charging in the road but truly in a snowy area the waste heat from it would automatically clear the roads which in a place like Florida has no use for but in Canada it would be great.
40.
by sbradford26 3y ago
Yeah with space it is typically more efficient to move energy versus mass. The efficiency may not be great but you get to balance it with the increased efficiency of solar panels being located in space. So independent component efficiencies
41.
by sbradford26 3y ago
So largely I believe the plan is to use microwaves to send the power back to earth so you don't have to have anything processed in space. This would usually involve ground stations that would receive the power.
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by sbradford26 4y ago
With the style of net meter in the article is makes sense to install a battery because it allows you to sell back power during the times you get the full rate. But yes otherwise you are right the return on investment will benefit smaller sy
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by sbradford26 4y ago
If you have net metering it is basically never worth installing batteries unless you are looking to be able to run during a power outage. Net metering turns the grid into an infinite battery so every kWh you generate offsets your overall us
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by sbradford26 4y ago
Fun fact the SR71 was capable of in air refueling but it still required pyrophoric triethylborane to start afterburners which couldn't be resupplied in air. So total mission time was limited by that and not fuel.
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by sbradford26 4y ago
So POE lighting is something that is taking off for businesses but could also be more easily retrofitted into a house. This would put the conversion from AC to DC in a centralized area which allows for more efficient hardware to be used. Ub
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by sbradford26 4y ago
DC actually tends to be more efficient at long distances at the same voltage. DC lighting does exist in the commercial space where lighting costs actually start to add up more than household use. The main barrier to DC systems in homes is s
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by sbradford26 4y ago
As of late the exchange rates have made it less expensive versus US dollars. Also add on the fact that tax is included in restaurant prices and there isn't tipping it honestly is pretty close to a moderate higher cost of living area in
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by sbradford26 4y ago
So Ford is providing pictures for people who ordered Ford Broncos currently. And for a method of keeping customers interested in the vehicle they ordered I think it is a really good tactic. https://www.motor1.com/news/5
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by sbradford26 4y ago
Processes like that work for bespoke things like the mars rovers and satellites. But for a mass produced product you will quickly run into a scale and storage issue. Ford is planning on making 150000 F150 Lightnings so around 400+ per day.
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by sbradford26 4y ago
So after the moon landings public interest started fading quickly for space programs. NASA didn't have enough funds to both continue Apollo programs and develop the Space Shuttle so they wound down Apollo early to best use the budget t
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by sbradford26 4y ago
IBM had to do a massive cleanup of the stuff at their original site in Endicott NY where they made PCBs. The locals call it the plume, apparently IBM just dumped Trichloroethylene as well as other chemicals on the ground for years in some o
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by sbradford26 4y ago
Just need an * on the button. Close doors when all other parameters are satisfied. * * The minimum door opening time parameter might be the standard door closing time parameter
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by sbradford26 4y ago
Yeah that makes sense. In aerospace they will fall on the side of accuracy even at the expense of speed. But they also tend to utilize FPGAs that can be designed to handle fixed point calculations quickly but with that comes a lot of cost a
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by sbradford26 4y ago
Yeah we tended to utilize fixed point for many of our variables and documented the precision for each one. Then an analysis was done verifying that we were maintaining precision through the calculations from input from a sensor to output.
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by sbradford26 4y ago
INT_MAX is assuming every variable is using a 32 bit integer which is not always the case. In my experience with flight control systems controls systems were focused on using the smallest variable necessary for a given variable. We had many
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by sbradford26 4y ago
When designing new systems it is best to clearly define the expected units for everything clearly at the start. SI units are great but sometimes they are not great for the specific use case. When measuring high power systems like power plan
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by sbradford26 4y ago
If I have data going out on a data bus in grams/second, but someone reading that data in a different sub system reads it and thinks it is kilograms/second because that is the default unit they use then you have an issue. The actua
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by sbradford26 4y ago
The biggest lessons learned on the Mars Climate Orbiter wasn't exactly that everything should be metric. It was the unit conversion is dangerous and needs to be handled very carefully. Just saying everything will be metric doesn't
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by sbradford26 4y ago
Yeah that is a major perk of the new postal trucks both EV and ICE is that they will finally get Air conditioning and an adequate heating system. The LLV had no AC which led to many issues in hot climates, and the heater was not large enoug
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by sbradford26 4y ago
The issues is that it does. Using tractors to farm and harvest it all, all the industrial processes to create fertilizer all require carbon to be taken from within the earth. If you only look at the corn to fuel yes it doesn't produce

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