MoR
Middle of Row
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Leave a Comment (0) →Minimum Point of Presence/Engry (MPoP)
Either the closest practicable point to where the carrier facilities cross the property line or the closest practicable point to where the cabling enters a multi unit building or buildings.
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Leave a Comment (0) →Minimum Efficiency Reporting Value (Merv)
For air filtration measured in particulate size.
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Leave a Comment (0) →Main Distribution Area (MDA)
The space in a data center where the main cross-connect is located as defined by TIA 942 specifications.
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Leave a Comment (0) →Load
The demand placed on a system, typically used to describe the electrical demand on the electrical supply system or the cooling demand on the cooling system. Units are power such as kW, BTU/hr, Tons, etc.
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Leave a Comment (0) →Liquid Cooling
A general term used to refer to cooling technology that uses a liquid to evacuate heat. In data centers, the two prevalent forms of heat evacuation are liquid (chilled water) and refrigerant (DX).
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Leave a Comment (0) →Latent Cooling Capacity
Cooling capacity related to wet bulb temperature and objects that produce condensation.
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Leave a Comment (0) →Latent Cooling
The process of condensing water out of air, then evaporating the water later. Energy is given up by the water during condensation. If the water is then later evaporated (such as from a drip tray), the amount of energy used to evaporate the water is the same as the amount of energy given up by the water vapor to the cooling equipment when it was condensed. Cooling is occurring later in time, hence the name “latent cooling”. In a system where condensed water is pumped or drained away, the cooling that may occur from evaporation does not cool the environment where the condensation took place so the cooling capacity spent condensing the water vapor is wasted energy.
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Leave a Comment (0) →KVM
Keyboard, Video, Mouse, an interface technology that enables users to access multiple servers remotely from one or more KVM sites. More obscurely, can also mean Kernel-base Virtual Machine: a version of the Java Virtual Machine for small devices with limited memory.
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Leave a Comment (0) →Kilovolt Amperes (kVa)
One thousand watt hours (see Wh). kWh is a common unit of electrical energy.
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Leave a Comment (0) →Kilovolt (kV)
One thousand volts.
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Leave a Comment (0) →ITIL
IT Infrastructure Library. Most widely adopted framework for IT Service Management. It is a practical approach to identification, planning, delivery and support of IT services to business. Version 3 approaches the requirements by functional area.
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Leave a Comment (0) →Internet Protocol (IP)
A communications technology using the internet for communications.
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Leave a Comment (0) →Inlet Air
The air entering the referenced equipment. For air conditioning equipment this is the heated air returning to be cooled, also called return air. For racks and servers this is the cooled air entering the equipment.
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Leave a Comment (0) →In-Row Cooling
Cooling technology installed between racks in a row that draws warm air from the hot aisle and delivers cool air to the cold aisle, minimizing the path of the air (see close coupled cooling).
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Leave a Comment (0) →Hybrid Cable
An assembly of two or more cables, of the same or different types or categories, covered by one overall sheath.
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Leave a Comment (0) →Hot Spot
An area, typically related to a rack or set of racks, where ambient air temperature is above acceptable levels. Typically caused by poor airflow management (insufficient cool air supply or an excess of recirculation).
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Leave a Comment (0) →Hot Aisle Containment (HAC)
A system that directs heated air from the outlet side of racks to air conditioning equipment return ducts in a highly efficient manner.
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Leave a Comment (0) →Hot Aisle
An aisle where rack backs face into the aisle. Heated exhaust air from the equipment in the racks enters this aisle and is then directed to the CRAC return vents.
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Leave a Comment (0) →Horizontal Distribution Area (H.D.A.)
Horizontal Distribution Area, a space in a computer room where a horizontal cross-connect is located as defined by TIA 942 specifications.
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