Method for Estimating the Energy Efficiency Ratio of Mixed System Air Conditioners and Heat Pumps.
Method for Estimating the Energy Efficiency Ratio of
Mixed System Air Conditioners and Heat Pumps.
Domanski, P. A.; Kim, B. S.
NISTIR 6045; 35 p. September 1997.
Sponsor:Department of Energy, Washington, DC
Available from: National Technical Information Service
Order number: PB97-211023
air conditioning equipment; air conditioner; building
technology; heat pumps; mixed system; rating procedure
In lieu of testing each split system air conditioner and
heat pump combination, an empirically based calculation
procedure may be used for estimating a unit's Energy
Efficiency Ratio at the 35 deg C (95 deg F) rating
condition, EER(95). The procedure accounts for
performance changes caused by using different indoor
sections with the same condensing unit. The procedure
is applicable to all electric units having rated cooling
capacities less than 19 kW (65,000 Btu/h) and charged
with Refrigerant 22. To estimate the EER(95) of one or
more combinations that use the same condensing unit, a
lab-measured EER(95) for one combination must be known.
Typically, the known EER(95) will correspond to the
indoor section most frequently sold with the given
condensing unit-termed the matched system--because the
testing of this combination is mandated by federal
regulation. In addition to the lab-measured EER(95),
select information on the hardware used in the indoor
sections of the matched system and the system(s) for
which EER(95) is sought, hereafter referred to as the
mixed system, must also be known.