Definition of turbine :  a rotary engine actuated by the reaction or impulse or both of a current of fluid (such as water, steam, or air) subject to pressure and usually made with a series of curved vanes on a central rotating spindle See turbine defined for English-language learners See turbine defined for kids Recent Examples of turbine from the Web , , , , , , , , , , , , ., , These example sentences are selected automatically from various online news sources to reflect current usage of the word 'turbine'.Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors.The oldest and simplest form of turbine is the waterwheel, which is made to rotate by water falling across its blades and into buckets suspended from them.Hero of Alexandria invented the first steam-driven turbine in the 1st century A.D., but a commercially practical steam turbine wasn't developed until 1884; steam turbines are now the main elements of electric power stations.

Jet engines are gas turbines.inhalater xp vaporizer reviewA turbojet engine uses a turbine to compress the incoming air that feeds the engine before being ejected to push the plane forward; a turboprop engine uses its exhaust to drive a turbine that spins a propeller.vape shop 46219A wind turbine generates electricity by being turned by the wind; the largest now have vanes with a turning diameter of over 400 feet.vaporizer white rhino - dubeOrigin and Etymology of turbine French, from Latin turbin-, turbo top, whirlwind, whirl, from turba confusion — more at turbid First Known Use: 1842 Other Mechanical Engineering Terms centrifuge, differential, flange, lathe, linchpin, pinion, plenum, ratchet, traction : an engine that has a part with blades that are caused to spin by pressure from water, steam, or air Learn More about turbine See words that rhyme with turbine Spanish Central: Translation of turbine Nglish: Translation of turbine for Spanish speakers Britannica English: Translation of turbine for Arabic speakers : Encyclopedia article about turbine Seen and Heard What made you want to look up turbine?vaporizer red eyes

Please tell us where you read or heard it (including the quote, if possible).randy's vaporizer reviewPosted by on August 29, 2013 Paper or plastic?quality vaporizer penRaised floor or slab floor?Some debates never produce a clear winner, and in the data center world, the topic of raised floor versus slab floor construction falls into that category.Although 20 years ago, the discussion was barely audible— nearly all data centers were built using raised floors — over the past decade, the theme has been at the forefront of many heated discussions among data center professionals.While an endless slew of studies and white papers exist to support each side, the bottom line is this:  the best design for a data center is one that is optimally aligned with the operational and business objectives identified by the company.

Just like a preferred taste for either Coke or Pepsi, it comes down to the best individual fit.One of the primary considerations is whether your data center is being built for a specific purpose by a single owner or tenant, or if it will serve as a multi-tenant colocation facility required to meet a broad spectrum of needs.For multi-tenant facilities that must take into account future flexibility, the raised floor approach offers an advantage.That’s because the accessible raised floor plenum facilitates easy additions to cooling or electrical infrastructure — it’s much simpler to run new conduits or piping under a raised floor than it is to run them overhead.The flexibility to install future services to cooling equipment such as door coolers, in-row cooling units, or heat transfer media direct to servers is important for some facilities.On the other hand, when it comes to equipment installation and movement, as well as overall maintenance costs, the slab floor is the front runner.

Concerns with point loading or moving loads that are associated with raised floor systems are not an issue with a slab floor.Additionally, the cost for maintenance runs lower.Cooling efficiency is one of the factors that virtually every data center operator is seeking in a base design, but a variety of analyses have concluded that neither option offers a significant advantage.A pressurized raised floor system delivering cooling air through perforated floor tiles consumes about the same amount of energy as cool air being pushed through overhead ducts and diffusers.From a layout flexibility perspective, a raised floor provides the benefit of being able to easily rearrange perforated tiles.Yet overhead cooling tends to produce fewer issues with air leakage or air bypass.And finally, when it comes to cooling efficiency, system air balancing tends to be a little more difficult in a raised floor environment.Most construction cost comparisons fail to produce a clear victor, as well.The various component costs associated with each approach yield a similar cost per square foot of data center area, according to most studies.

For regions prone to earthquakes, seismic performance is also a consideration, with the slab floor getting the nod.Not only is it a less costly option, but equipment anchoring is easier and the added lateral bracing and reinforcement associated with a raised floor system are not issues.Finally, market demand may also play a role in data center design.In some regions of the world, the market simply expects data center facilities to have raised floor.So the next time the great debate arises over slab versus raised floor, there’s no need to join in the dispute.Instead, just sit back and relax, and raise your glass of Coke.To control air flows, make sure the is continuous An air barrier helps control airflow both through and within the building enclosure.By controlling airflow, you also control moisture.If moist indoor air contacts a cold surface — for example, exterior sheathingMaterial, usually plywood or oriented strand board (OSB), but sometimes wooden boards, installed on the exterior of wall studs, rafters, or roof trusses; siding or roofing installed on the sheathing—sometimes over strapping to create a rainscreen.

in cold weather — condensation can result.An air barrier prevents those cold surfaces from being connected with humid indoor air.Air has a maximum storage capacity for water vapor which depends on temperature.Warm air can store lots of moisture, while cold air can store very little.According to Straube, as the temperature falls from 90°F down to 20°F, the amount of moisture that can be stored in the air changes by a factor of ten.“This is like a gas tank that shrinks as the temperature gets colder,” he says.“When it’s hot, you can store a lot in this tank, but when it’s cold you can’t store much at all.And if you were to have a large gas tank filled with gas and you shrunk it, eventually it would spill over.And that’s condensation.” Table of Contents 1.Air Leaks Waste Energy 2.Humidity & Mold Leaky homes didn’t have condensation problems Older buildings rarely had condensation problems in cold weather because they were so well ventilated — meaning leaky.

The relative humidity in an old home would rarely rise above 25%.As we have built tighter houses (and in some cases failed to provide mechanical ventilation), the indoor relative humidity has gone up.In a heated, tight, unventilated house, the amount of moisture in the air and the amount of condensation that can occur are dramatically different than in an old leaky house.Condensation can occur wherever water vapor can find a cold spot — on roof or wall sheathing, on the inside faces of the windows, and inside the walls.Let's say it’s 40°F outside and the outdoor relative humidity is 50%.If you allow that outdoor air to enter a building and heat it up to 70°F, the amount of moisture in the air stays exactly the same, but the “tank” gets bigger because the storage capacity of the air increases with the temperature.As a result, the relative humidity initially drops.Then, as moisture is added to the air, the relative humidity rises, and the absolute moisture content rises as well.

How do you add moisture to the air?You breathe, sweat, boil water for spaghetti, take hot showers, grow houseplants — and all of those activities generate moisture.When does indoor humidity become a problem?Let’s say that air leaks out of a house through holes in the enclosure.As it reaches surfaces colder than 52°F or 53°F, the air will cool.Once it reaches its full capacity to store moisture, condensation occurs.RELATED ARTICLES Questions and Answers About Air Barriers Airtight Wall and Roof Sheathing One Air Barrier or Two?Blower Door Basics Pinpointing Leaks With a Fog Machine How to Use the Psychrometric Chart Rating Windows for Condensation Resistance All About Wall Rot If the temperature of the outdoor air is around 30°F, the indoor air will drop all of the moisture that it gained on the way out, dumping it on the cold sheathing surface.That’s a typical example of the air leakage condensation cycle.Since condensation in walls can cause puddles — and in extreme cases, rot the framing — condensation is something you want to avoid.

Installing an air barrier is one way to help prevent condensation.Air conditioning can also create condensing surfaces The same phenomenon can happen in reverse in the summertime.Let’s say the outdoor air is 85°F and the relative humidity is 75%.When outdoor air leaking inward contacts a surface below about 76°F, the moisture in the air will condense.So if you have an exhaust fan in your home, the air leaking in may cause condensation on the air-conditioned surfaces — for example, on the back side of vinylCommon term for polyvinyl chloride (PVC).In chemistry, vinyl refers to a carbon-and-hydrogen group (H2C=CH–) that attaches to another functional group, such as chlorine (vinyl chloride) or acetate (vinyl acetate).If moist air leaks into a house through gaps in the wall or roof, you can have problems.But in a tight house with a good air barrier and a supply-only ventilation system, most of the air that’s drawn inside is drawn in through the air conditioner, so the first cold surfaces it sees are the cooling coils.