[RD] Daily Graphs and Charts

[hobbsyoyo]

Amazing gif. Thanks a ton for sharing it. As someone who knows nothing about cars, this was informative and fun.

 

[dutchfire]

Are people trying to win back energy from the hot cooling fluid?

 

[JohannaK]

I dont think so. Never heard of it anyhow. Then again even though I am familiar with most of what is in the graphic, I know next to nothing about cars. So there is that.

 

[hobbsyoyo]

Are people trying to win back energy from the hot cooling fluid?

That would add a lot of cost and complexity for little gain. The cooling fluid is only going to pick up a small fraction of the total thermal output of the engine - that's just how cooling systems work (excluding those for actual power plants). You only care about the parts of the machine that get near their thermal limits and then you only pull out the minimum amount of thermal energy you need to to make the scheme work. The majority of the energy is going to be passively radiated away or carried away by air currents outside of the heat exchanger system.

The only way I would see that being plausible is for a really small engine attached to an electric drive train. Everything else would be too complicated or expensive or provide no real benefit. For 'normal' hybrids where the ICU actually is connected directly to the wheels (i.e. it is not just a glorified generator) and regular ICU cars it would not add much benefit at a high cost.

I don't know much about cars but I know a lot about thermodynamic cycles in engineering applications.

Having said that I'd be delighted to read a link showing me I'm wrong if someone has one. This is quite interesting.

 

[Cutlass]

Are people trying to win back energy from the hot cooling fluid?

No. With one small exception. And that exception being that the car's cooling system is also the car cabin's heating system. What that means is that you actually heat the interior of the car with waste heat from the engine. Which gives you this neat little trick to use when your car is overheating. The car's heater is also a radiator. Open your windows and crank the heat on full blast and fan on high and you actually add about 10-15% to the cooling capacity of your car.

Otherwise waste heat is just waste heat, and it has to be gotten rid of. Which is what the radiator does. Without the cooling system the engine would become so hot that the moving parts of it would actually weld themselves together, and no longer be moving parts. The engine would be ruined. This is one of the reasons that internal combustion engines aren't particularly fuel efficient. Much of the energy is wasted in the form of waste heat.

To recapture energy from waste heat takes something like a steam turbine. Which is a bulky and heavy installation. So makes no sense to use on a car.

 

[Hygro]

Driving with the windows down and the heater blasting is one of my guilt-free pleasures.

 

[Lohrenswald]

 

[Arwon]

Why would anyone ever choose to present that information as a bloody pie chart.

 

[Lohrenswald]

sector diagrams is the way you present the components of a thing

the point is to make clear the amount of total games on steam was released each year

how else would you put it
I guarantee any other suggestion is worse

 

[Arwon]

It's a time series

 

[The_J]

Making a bar chart out of it or a scatter plot will not make it more clear .

 

[Hygro]

When I first saw the graph I initially had Arwon's reservation, a time series could be well represented with a curve, but then I realized that the volume per year comparison would be lost so I was alright with the pie chart.

 

[Arwon]

If I felt the year by year quantities as a proportion of total were important, I'd probably have gone for a stacked bar or column graph.

 

[Cutlass]

 

[Cutlass]

https://www.ncdc.noaa.gov/sotc/global/201613

 

[Paul in Saudi]

The headline was "Chicago Still Not America's Murder Capital."

==edited to ask==
How can I fix this mess?

 

[The_J]

Chicago has more murders than Germany.
Not only relatively seen, but absolute o_O.

 

[warpus]

It's actually even a pretty safe city to visit, if you stick to the main tourist sights and nearby areas anyway, plus probably most of the city really from what I've read. A bit of a testament of not only how bad this problem is in some American cities, bit also of how well Germany is doing in this regard.

 

[The_J]

We're not even lowest in Europe.
But just checking, seems that different sources report different numbers. Wiki reports more than twice the amount of murders for Germany via UN sources than the official German statistics office reports, mmmhh.
Apparently cape town itself has more than 2000 murders/year (section in German wiki), whereas whole of Europe (-Russia) only has 8000.

 

[Paul in Saudi]

Baltimore (population about 66.000) has more murders than New York City (eight-point-something million).