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Corrosion fatigue
Corrosion fatigue describes a situation where a metal is exposed to both mechanical fatigue and corrosion simultaneously.
COSP (Coefficient of system performance)
The COSP of a heat pump is based on the total heat extracted (also referred to as Q) in relation to the energy supplied to the heat pump (also referred to as W).
Crevice corrosion
Crevice corrosion is a localized form of corrosion attack.
Cross flow heat exchanger
A cross-flow heat exchanger exchanges thermal energy from one airstream to another in an air handling unit (AHU). Unlike a rotary heat exchanger, a cross-flow heat exchanger does not exchange humidity and there is no risk of short-circuiting the airstreams.
Decommissioning and disposal costs (Cd)
In the context of life cycle cost, decommissioning and disposal costs are non-existent or modest in commercial building systems.
Decomposition
Decomposition is the breakdown or degradation of complex organic substances into simpler substances by chemical or biological processes.
Degree day
Degree Days are a measure of how cold (or hot) it was over a period of time, and correspondingly how much energy is needed for heating (or cooling) a building.
Detention tank
A detention tank is an artificial flow-control structure that is used to contain stormwater and wastewater for a limited period of a time.
Detention tank
A detention tank is an artificial flow-control structure that is used to contain stormwater and wastewater for a limited period of a time.
Dew point
The dew point temperature is the temperature where the water content in the air condenses into water. This means that the water content in the air changes states from gas to liquid.