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Introduction
Purpose of electricity charge apportionment1.
The electricity charge apportionment function apportions air conditioner electric charges to tenants.
Generally, indoor units are divided among and used by each tenant, and calculation of the electricity
charge for each tenant is easy. But since outdoor units are shared by multiple tenants, calculation of
the electric charge for each tenant is not easy.
The electricity charge apportionment function is allows distribution of the electricity charges of outdoor
units, which are a large part of the air conditioner power consumption, according to the air conditioner
usage ability of each tenant.
Features of electricity charge apportionment of ECA Tool2.
There is a method of carrying out apportionment calculations from the used electricity volume (1)
sent from the electricity meter and the unit price, and there is also a method of electricity appor-
tionment calculation based on the amount on the invoice from the electricity company.
Apportionment calculation is performed according to indoor unit usage ability.(2)
In addition to electric charge calculation of outdoor units only, electric charge calculation including (3)
indoor units is also possible.
Flexible denition according to the electric charge contract conguration, block conguration, and (4)
usage period is possible.
Since the data for 1 year is saved, recalculation of the past is possible.(5)
Basic electricity charge apportionment terms3.
The terms related to electricity charge apportionment which appear in this section are dened below.
Apportionment Distribution proportional to basic quantity.
Contract Billing objective of electricity charge from electric power company.
Block
Aggregate of indoor units used by building tenants. A block used exclu-
sively by a specic tenant is called a tenant block and a block shared by
multiple tenants is called a common block.
Energy used Energy used by indoor units and outdoor units to perform air conditioning.
Electricity charge
Electricity charge billed from an electric power company. Consists of basic
charge billed without regard to amount used, metering charge billed only for
the amount used, additional charge billed for special reasons, etc.
Undened block
Special block which is allocated the power consumption, etc. of indoor units
which are not allocated to a tenant block or common block. Generally, elec-
tric charges considered to be borne by the building owner or manager are
apportioned to an undened block.
Parameters Detailed unit Information used in electricity charge calculation by the elec-
tric charge apportionment function.
RB
RB is the abbreviation for "Refrigerant Branch Unit" used with a heat recov-
ery system.
It is installed at the refrigerant piping between outdoor unit and indoor unit
to switch the refrigerant circuit in the operation mode of each indoor unit.
VRF NW ID
The aggregate of multiple Refrigerant system connected by the same com-
munication line is called as VRF NW and ID is the number to distinguish
VRF NW.