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patricktbrown.org | ||
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www.hackaday.io
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| | | | | As you can see by the save log on the right, it took a bit of effort to get the simulation of the machined coaxial hotend to generate believable results. I was having ABS filament that seemed to be uncooled, even though the contacts seemed to be set up correctly: As you can see, the cooling performance difference is drastic. For the machined coaxial hotend, assuming that the 6028 blows over a CSA of 36mm x 15mm, I got a coefficient of convection to be 32.3W/(m^2 K) from a wind speed of 10m/s, implying that I could run the fan at half-speed and still have adequate cooling. I used 0.03 to be the emmisivity of radiation.However, the conduction through the heatbreaks in the unibody is much too high and thus the entire part is still over 100C. Going from the simu... | |
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earthsystem.org
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| | | | | Global warming, the increase in near-surface temperature due to the enhanced greenhouse effect at global scale, has clearly been reflected in observations over the last 50 years. However, the severities of warming in different regions and different period differs a lot. Scientists have considered many factors which may contribute to shape the temperature trends. For... | |
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orach24463.wordpress.com
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| | | | | NOAA How to erase the Global Warming Pause1. Don't use any data that shows the 18 + year pause in global warming or disagrees with your premise including Satellite Temperature Data or Argo Sea Surface Temperature Data. 2. Instead use measurements from buoys that were never intended to be used to measure temperatures accurately.3. Than... | |
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www.drroyspencer.com
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