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Frontiers | Loading PCM Into Buildings Envelope to Decrease Heat Gain-Performing Transient Thermal Analysis on Nanofluid Filled Solar System

The high share of buildings in energy consumption and carbon dioxide emission has led researchers to seek techniques to reduce energy consumption in this sector. In this study, considering a hot and arid climate region, the wall's heat gain was investigated. To reduce energy demand, three techniques of adding PCM, combining absorption chiller with a solar system and dispersing nanoparticles were used and the results were evaluated transiently. In July, the addition of PCM to the building's walls reduced the heat exchange between interior and exterior spaces up to 21%. To cool the interior spaces, the combination of absorption chiller + fan coil was used and several flat plate collectors were integrated with it to reduce energy demand. By collecting energy in solar collectors and using a stratified tank, energy consumption in the generator section was reduced by 450 kWh. Nanoparticles were used to improve the solar system performance and it was found that loading ZnO and Al2O3 n ....

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You can have a passively-cooled GeForce RTX 3080... for a price


When silence is worth dealing with scalpers
on February 17, 2021, 18:19
22 comments
In brief: Over the years there have been endless attempts at creating 100% passively-cooled PCs, but most of those builds used lower end components. It turns out that you can have a silent system equipped with an Nvidia RTX 3080, but it s neither cheap nor extremely practical for most people.
For fans of silent PCs, passively cooling the CPU has traditionally been easier to achieve than with graphics cards, mostly because of the difference in power draw from the two components. There are companies that dedicate to offer custom-built PCs for those who want that fanless experience, and enthusiasts love to put things to the test and see how far one can push these systems. ....

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Cooling Interiors Will be the Architectural Challenge of the Future


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According to the UN, more than 7000 extreme weather events have been recorded since 2000. Just this year, wildfires raged across Australia and the west coast of the U.S.; Siberia charted record high temperatures, reaching 100 degrees Fahrenheit before Dallas or Houston; and globally, this September was the world’s hottest September on record. As the effects of the climate crisis manifest in these increasingly dire ways, it is the prerogative of the building industry – currently responsible for 39% of global greenhouse gas emissions – to do its part by committing to genuine and sweeping change in its approach to sustainability.
One of the most challenging aspects of this change will be to meet mounting cooling demands in an eco-friendly way. Cooling is innately more difficult than heating: any form of energy can become heat, and our bodies and machines naturally generate heat even in the absence of active heating systems. Cooling does not benefit equally from spo ....

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