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Data center planning must include careful thought about the environmental needs of the facility. more
Data Centers...
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Things to know...
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The ampere (symbol: A) is the SI unit of electric current. The ampere, in practice often shortened to amp, is an SI base unit, and is named after André-Marie Ampère, one of the main discoverers of electromagnetism.

In practical terms, the ampere is a measure of the amount of electric charge passing a point per unit time.

the term "BTU" is used to describe the heat value (energy content) of fuels, and also to describe the power of heating and cooling systems, such as furnaces, stoves, barbecue grills, and air conditioners. When used as a unit of power, BTU 'per hour' (BTU/h) is understood, though this is often confusingly abbreviated to just "BTU".

BTU /KW conversion
1 BTU equals 0.0002928 kilowatt-hours
1 BTU/minute equals 0.01757 kilowatt.
Computational fluid dynamics (CFD)
Computational fluid dynamics (CFD) is one of the branches of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows. Computers are used to perform the millions of calculations required to simulate the interaction of liquids and gases with surfaces defined by boundary conditions

Free Cooling
During cool weather, the outside ambient temperature can help save energy in chilled-water systems. The low temperature of the cooling tower water supply enables free cooling of research laboratories, computer rooms, and office buildings. This free cooling is possible if the central plant incorporates a plate-and-frame heat exchanger to provide chilled water production, which means the chiller's compressor can be shut down. Free cooling can be used to save energy whenever the outside wet-bulb temperature drops below the required chilled water set-point.
Emergency Power Off button/ switch is required by section 645.10 of the national electrical code. "a means shall be provided to disconnect power to all electronic equipment in the information technology equipment room."
Horse Power
Horse Power-It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses. The horsepower was widely adopted to measure the output of piston engines, turbines, electric motors and other machinery.
1 horsepower = 745.699872 watts
Hot Aisle / Cold Aisle
Hot Aisle / Cold Aisle Because of the front-to-back airflow of the systems, the ideal placement of the cabinets and racks is to have the systems installed front to front and back to back. This configuration is referred to as a hot-aisle/cold-aisle layout.
1 horsepower = 745.699872 watts
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KVAWhile the kilo- volt-ampere (abbreviated KVA) and the watt are dimensionally equivalent one may find products rated in both VAs and watts with different numbers. This is common practice on UPSs (Uninterruptible Power Supplies. The KVA rating is the apparent power that a UPS is capable of producing, while the watt rating is the real power (or true power) it is capable of producing, as opposed to reactive power. In the type of loads often used with UPSs, such as computers, the apparent power used (kilo -volt-amperes) will be larger than the true power used (watts). The real power divided by the apparent power is called the power factor.
KWThe kilowatt (symbol: kW), equal to one thousand watts, is typically used to state the power output of engines and the power consumption of tools and machines. A kilowatt is approximately equivalent to 1.34 horsepower.
PDU - Power Distribution Unit
PDUPower Distribution Unit is the final point of electrical power distribution in a data center.
Power Factor
Power FactorThe real power (KW) divided by the apparent power (KVA) is called the power factor.
Watts Per Square Foot
Watts Per Square FootW/FS is the total amount of watts consumed divided by the square foot area. The W/FS is normally broken down by groups, lighting, electronic equipment, cooling and miscellaneous.
Plugs and Receptacles

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