Panasonic CZ-256ESMC3 - Methodology for Calculating Distributions

217
Appendix
Appendix
Methodology for calculating distributions
This unit is able to make simplied calculations of air conditioning distribution and energy (electricity and
gas) usage with the cumulative operating time (thermostat ON/thermostat OFF) of indoor units and the
performance values of indoor units.
Calculations for time distribution
Calculate the electricity/gas consumption index for indoor units individually or as a part of a distribution group, and calculate the electricity/gas
consumption distribution ratios for indoor units individually or as a part of an area group.
Types of parameters used to calculate distributions
The following parameters are used for calculating time distributing.
Parameter Explanation
RHHi The cumulative operating time of indoor unit No. i* (high)
RHi The cumulative operating time of indoor unit No. i* (mid)
RLi The cumulative operating time of indoor unit No. i* (low)
SHHi The cumulative thermostat ON time of indoor unit No. i (high)
SHi The cumulative thermostat ON time of indoor unit No. i (mid)
SLi The cumulative thermostat ON time of indoor unit No. i (low)
Pi The performance of indoor unit No. i (a value equivalent to kW)
k Weighting coefcient for electricity when the thermostat is ON and when it is OFF
αHH Weighting coefcient for fan speed when the speed is high
αH Weighting coefcient for fan speed when the speed is mid
αL Weighting coefcient for fan speed when the speed is low
* Cumulative operating time is equal to thermostat ON cumulative time PLUS thermostat OFF cumulative time
Attention
y If the distribution mode (→ “Set the distribution mode” (P.160)) is set to “Time”, do not allocate PAC and GHP to the same distribution
groups.