Heat Pump; Function And Properties; Operating Mode - Panasonic WH-SDF03E3E5 Series Design Handbook

2.2 Heat pump

2.2.1 Function
and properties
Aquarea LT
High COP
5,08
AQUAREA LT
LOW TEMPERATURE HEAT PUMP
Aquarea HT
Supply
temperature
65ºC
AQUAREA HT
HIGH TEMPERATURE HEAT PUMP
Aquarea T-CAP
100 %
Output
up to -15°C
AQUAREA T-CAP
TOTAL CAPACITY HEAT PUMP

2.2.2 Operating mode

Aquarea air / water heat pump – design handbook 07 / 2014
The heat pump as the core piece of the heat pump system was developed
by Panasonic in three different series. In this manner, individual require-
ments for the heat supply of buildings should be considered with each
series' properties in mind:
Ideal for low-temperature heat emitters or underfloor heating systems;
also for radiators.
For high temperature radiators (e.g. radiators in the refurbishment con-
text), Aquarea HT can supply a water temperature of 65 °C without assis-
tance even at outside temperatures of -15 °C.
For applications at which the kW output capacity should be kept constant
even at outside temperatures of -7 or -15 °C. It is ensured that even
under extremely low outside temperatures sufficient capacity is always
at disposal for heating the house without assistance from other heat
generators .
With the exception of the HT series, all models are available with cooling
mode. Furthermore, Aquarea heat pumps are available in 2 version:
Monobloc (the whole unit outdoors) or Bi-Bloc (indoor and outdoor unit)
(for details see the chapter 3).
It is generally true that the larger the difference between outside temper-
ature and the temperature of the generated heat, the lower the perfor-
mance factor of the heat pump. Since high temperature differences oc-
cur extremely rarely with correctly designed heat pump systems in the
course of the year, temporary heating with an additional electric heater is
often accepted. Alternatively to an additional electric heater, it is possible
to work with an alternative heat generator like a condensing boiler or a
stove with a back boiler. The four different operating modes are:
1. Monovalent operating mode
Heat pump serves as the sole heat generator.
2. Mono-energetic operating mode
Electricity is used to operate a heat pump and additional electrical
heater (electric heat pump + additional electric heater for peak load).
3. Bivalent alternative operating mode
A second heat generator supplies the property using a further energy
source, under certain conditions (e.g. stove with back boiler instead of
heat pump for outside temperatures < -5 °C).
Heat pump system
Function and properties, operating mode
Heat pump
13