As climate change intensifies summer heat, demand is growing for technologies to cool buildings. Now, researchers report in ACS Energy Letters that they have used advanced computing technology and artificial intelligence to design a transparent window coating that could lower the temperature inside buildings, without expending a single watt of energy.

Inside the tank, the vapor rising from the boiling fluid contacts a cooled condenser in the tank lid, which causes the vapor to change to liquid and rain back onto the immersed servers, creating a closed loop cooling system.


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Liquid cooling is a proven technology, Belady noted. Most cars on the road today rely on it to prevent engines from overheating. Several technology companies, including Microsoft, are experimenting with cold plate technology, in which liquid is piped through metal plates, to chill servers.

Microsoft investigated liquid immersion as a cooling solution for high-performance computing applications such as AI. Among other things, the investigation revealed that two-phase immersion cooling reduced power consumption for any given server by 5% to 15%.

This shift to two-phase liquid immersion cooling enables increased flexibility for the efficient management of cloud resources, according to Marcus Fontoura, a technical fellow and corporate vice president at Microsoft who is the chief architect of Azure compute.

Adding the two-phase immersion cooled servers to the mix of available compute resources will also allow machine learning software to manage these resources more efficiently across the datacenter, from power and cooling to maintenance technicians, Fontoura added.

Instead of an engineered fluid, the underwater datacenter is filled with dry nitrogen air. The servers are cooled with fans and a heat exchange plumbing system that pumps piped seawater through the sealed tube.

Energy-efficient window attachments are important for both new and existing homes. About 30% of a home's heating energy is lost through windows. In cooling seasons, about 76% of sunlight that falls on standard double-pane windows enters to become heat. Window coverings can help with this loss of energy by providing comfort, regulating temperatures, and lowering energy bills. The exact savings will depend on the type of attachment, the season, the climate, and how the attachment is used. In addition to the window coverings, storm windows with low-e coatings and/or multi-layer glazing are effective at improving thermal performance of windows and reducing solar heat gain.

In heating seasons, tightly installed cellular shades can reduce heat loss through windows by 40% or more, which equates to about 10% heating energy savings. In cooling seasons, cellular shades can reduce unwanted solar heat through windows by up to 60%, reducing the total solar gain to 20% when installed with a tight fit.

Cellular shades that operate on side tracks are most effective at increasing the R-value of windows, and those that open from both the top and bottom allow users to most effectively control daylight entering the home.

Some cellular shades include the option of automation, allowing the blinds to open and close on a set schedule. The schedule can be seasonally optimized to reduce heating and cooling loads while maximizing natural light and home comfort.

During summer days, you should close draperies on windows receiving direct sunlight to prevent heat gain. Studies demonstrate that medium-colored draperies with white-plastic backings can reduce heat gains by 33%.

To reduce heat loss, draperies should be hung as close to windows as possible and fall onto a windowsill or floor. For maximum effectiveness, install a cornice at the top of a drapery or place the drapery against the ceiling. Then seal the drapery at both sides and overlap it in the center. You can use Velcro or magnetic tape to attach drapes to the wall at the sides and bottom. Taking these steps will further reduce heat loss.

Window films (applied to the glazing surface) help block against solar heat gain and protect against glare and ultraviolet exposure. They are best used in climates with long cooling seasons, because they also block the sun's heat in the winter.

Silver, mirror-like films typically are more effective than the colored, more transparent ones. More recently, there are solar control films that have a more neutral appearance and are effective at blocking near IR solar radiation in the summer. East- and west-facing windows, because of their greater potential for heat gain, can benefit more from these films. North-facing windows won't benefit from them, and south-facing windows may benefit somewhat, but the benefit could be offset by the reduction of heat from the winter sun.

Roller shutters are usually mounted above the window and side channels guide them as they're lowered and raised. When you lower these blinds completely, their slats meet and provide shade, privacy, security, and protection from storms. If partially raised, the blinds allow some air and daylight to enter through windows.

Window awnings can reduce solar heat gain in the summer by up to 65% on south-facing windows and 77% on west-facing windows. You can use an awning to shade one window or have an awning custom-made to shade the entire side of your house.

While awnings can save energy during the cooling seasons, they can increase energy used for heating, so keep this in mind when deciding whether awnings are right for you. You can also adjust your use depending on the season: keep awnings installed or closed in the summer and remove or open awnings in the winter. Fixed awnings can sometimes be installed to allow the lower-angle winter sunlight to reach windows.

If you want to quickly manage windows, you probably pin your most-used programs and tools to the taskbar. If you want to get at them even faster, simply hold down the Windows button and press the number on your keyboard that corresponds to their spot on the taskbar. On mine, opening Chrome is Win + 1, opening Photoshop is Win + 5, et cetera.

The other night, a few of my friends and I got into a cool (although some would argue it was heated) argument about the efficiency of cooling a house with air conditioning. I wanted to leave the windows open for 20 minutes or so, but they told me I was wasting energy.

Turns out, you're a giga-savant whos brain works better than a trained physicist, who could tell you exactly how air conditioning is supposed to work but has never experimented with one empirically. See, air, much like water, flows in the direction of least resistance. Guess what happens to air when you pump it into a sealed room? Hot air, cold air: it doesn't matter... If you said something along the line of "it begins to push against itself until it finds an easier place to go," then you've got some mind! Just try it for yourself. shade your room with blinds, crack the window, maybe crack the doors open in other rooms. Make sure the other rooms have closed windows (remember, we're directing air at this point), and let the AC blast... Booya! Your friends were just getting on your case because their parents got on theirs, not because closing your window cools a room faster. Should you have all the windows open while running the AC? Heck no. Think of the ratio! how much air does your AC blast anyway? So, then, guess what you do when your room is finally nice and cold, and likely one of, if not the coolest room in the house? Yep. Close the window. It should take about 20 minutes!

Actually, using a ceiling fan or portable fan doesn't cool down a room, but they feel good blowing on you and help to keep your body temperature down."}},{"@type": "Question","name": "Will closing window curtains during the day help keep rooms cool?","acceptedAnswer": {"@type": "Answer","text": "Absolutely! Keeping the curtains closed, especially in a room where the sun pours in, will help keep the heat out, thus keeping the room and your house cooler."}},{"@type": "Question","name": "Which way should the ceiling fan be blowing in the summer?","acceptedAnswer": {"@type": "Answer","text": "The ceiling fan should be blowing down during the summer so you can feel the breeze. Check the switch on the fan or use the remote to ensure that your ceiling fan is moving in a counterclockwise position."}}]}]}] Skip to contentbuttonbuttonVisit The Spruce's homepageĀ  Ā  NewslettersClose search formOpen search formEnter your search termSearch DecorRoom DesignDecoratingDesign StylesSmall SpacesFeng Shui See allĀ  GardenPlants A to ZHouseplantsLandscapingPests & ProblemsWild BirdsIn the Weeds With Plant PeopleThe Spruce Gardening Review Board See allĀ  Home ImprovementSkills & SpecialtiesPaintingKitchenBathroomInterior RemodelExteriorsOutdoor BuildingHome ServicesGreen ImprovementsThe Spruce Home Improvement Review Board See allĀ  CleaningCleaningOrganizingLaundryPest ControlThe Spruce Cleaning Review Board See allĀ  CelebrationsEvents & PartiesEtiquette & AdviceBirthdays See allĀ  What to BuyHow We Test ProductsBeddingFurnitureVacuumsBest GiftsCleaning Products See allĀ  NewsHome TrendsBrands & CollectionsSales & DealsHouse ToursPerspectives"One Thing" Video SeriesIn the Weeds With Plant People See allĀ  About UsEditorial PolicyProduct TestingDiversity & InclusionGardening Review BoardHome Improvement Review BoardCleaning Review Board See all Get daily tips and tricks for making your best home.SubscribeĀ  Ā  About UsNewsletterPress and MediaContact UsEditorial GuidelinesHome ImprovementSkills & SpecialtiesHVACHow to Cool Down a Room Without AC or Windows To lower air temperature, try fans, wet sheets, or ice misting 17dc91bb1f

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