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Direct electricity load control
In this instance, the utility will install a radio-controlled device on the equipment
(typically HVAC). Then during periods of heavy usage, the utility can send a signal to
the device to turn off the HVAC for a given period.
Direct load control
This type of Demand-Side Management represents the consumer load that can be
interrupted at the time of annual peak load by direct control of the utility. Direct Load
Control does not include Interruptible Load. Direct load control typically deals with
residential customers.
Direct use
Direct use refers to electricity that is self-generated, meaning it is produced by the
same entity that consumes it.
Direct utility cost
A utility cost that is identified with one of the DSM program categories (e.g. Energy
Efficiency or Load Management).
District heat
District heat is steam or hot water from an external source that is used as an energy
source in a building. The steam or hot water is produced in a central plant, then
piped into the building for heating. It can be purchased from a utility or produced in a
physical plant on the facility site.
Diversity
Diversity in the electricity system refers to the many individual loads that contribute
to overall demand on the system. The loads within different customer rate classes
typically follow usage patterns, but the different classes of service place a range of
different demands upon the grid. The diversity in service requirements of one class
to another can differ by time-of-day usage, facility usage, and/or demands to the
grid.
