Carrier Block Load Definitions Flashcards
LOAD COMPONENT
A definable building feature which can be associated with a heat gain or loss. Examples include: walls, roofs, windows, lights, people, infiltration, partitions and other electrical equipment.
ZONE
A conditioned area of a building, normally controlled by a single thermostat.
ZONE MASS
The mass of walls, roofs, floors, furniture and carpeting in a zone.
HEAT GAIN
The amount of heat transferred into a zone during a specified period of time. This heat is either transferred directly to the zone air via convection, or radiated to,
and stored in, the zone mass. Heat stored in the zone mass is eventually released to the zone air via convection. All heat gains become cooling loads but not until the heat is transferred to the zone air.
SENSIBLE HEAT GAIN
Heat gain that results in a change in temperature of the zone air or mass.
LATENT HEAT GAIN
Heat gain which results in a change in the moisture content of the zone air.
COOLING LOAD
The amount of sensible and latent heat gain which must be removed from the zone air during a specified period of time to maintain the zone at a constant
temperature and moisture content. All heat gains become cooling loads. However, cooling loads may occur at a later time than the heat gains due to the time it takes the heat stored in the zone mass to be convected to the zone air.
SYSTEM LOADS
Load imposed on a building which do not occur within a conditioned zone. System loads increase, or decrease, the cooling coil load, but do not affect the
temperature or moisture content within any of the zones. Examples of system loads include ventilation loads, fan heat gain, plenum loads and duct heat gain.
COOLING COIL LOAD
Load imposed on a building which do not occur within a conditioned zone. System loads increase, or decrease, the cooling coil load, but do not affect the
temperature or moisture content within any of the zones. Examples of system loads include ventilation loads, fan heat gain, plenum loads and duct heat gain.
