Heat Pumps AQUAGOR

Diagram of a water|water heat pump system

Key information:

  • Minimum temperature of ground water 7°C.
  • Installation of heat pump in a dry room with temperature above 0°C.
  • Option of heating and heating of sanitary water.
  • Availability of energy source throughout the year.
  • Monovalent operation mode.
  • Simple electronic control of the system.
  • Basic configuration allows 1 mixing and 1 direct heating circuit.
  • Using the expansion modules, up to 32 mixing circuits can be controlled.
  • Allows two independent hydraulic circuits.
  • Passive cooling option.

 

Water/water heat pumps are among the most efficient heating energy systems. The temperature of ground water is a very reliable and constant energy source since its temperature is between 7°C and 13°C. Actual water temperature depends on the location where it is pumped. The ratio between input power and output heat (Coefficient of Performance, or COP) is very favourable in water/water systems, often exceeding the figure of 5, considering the annual average.

Implementation of a AQUAGOR heat pump requires drilling two boreholes into the ground: primary borehole (well) for pumping the water and secondary borehole for returning the water to the ground. Based on experience, optimum distance between the primary and secondary borehole is approximately 15 meters. A part of the energy stored in the water pumped from the ground is recovered and the water is returned to the ground, cooled by 2°C to 4°C, without causing any chemical change to the water whatsoever. Before using water as the primary heat source, a pump test must be conducted to check the amount of water and its quality. Water right permit is required for pumping ground water.

 

Passive cooling

In the AQUAGOR heat pump system, minor adjustments can also be made to allow passive cooling. In this case, relatively low ground water temperature is used to cool the rooms. During passive cooling, the heat pump is not in operation, which allows minimum energy consumption for cooling and thus, compared to conventional air conditioning, much lower electricity bill.

Technical characteristics of heat pumps AQUAGOR

Model HP WW 7 HP WW 9 HP WW12 HP WW 14 HP WW 18
Dimensions (HxWxD) mm 935x654x580 935x654x580 935x654x580 935x654x580 935x654x580
Mass kg 86 97 121 137 142
Heating water temperature °C 55 55 55 55 55
Refrigerant / R 407 C R 407 C R 407 C R 407 C R 407 C
Refrigerant - mass kg 1,4 1,6 1,7 1,8 2,1
Sound power level* dB (A) 52 (±1,5 dB) 52 (±1,5 dB) 52 (±1,5 dB) 52 (±1,5 dB) 52 (±1,5 dB)
Water flow - heat source m3/h 1,51 1,98 2,71 3,34 4,18
Water flow - heating m3/h 1,11 1,46 2,01 2,46 3,06
Power supply/ Fuse V/A 400/C10 400/C10 400/C16 400/C16 400/C16
* Measured according to standard DIN EN 3750.

Technical characteristics at different heating water temperatures

Model HP WW 7 HP WW 9 HP WW12 HP WW 14 HP WW 18
Heating power / Rated power (W10/W35)** kW 6,4/1,21 8,4/1,56 11,6/2,15 14,2/2,63 17,7/3,16
COP (W10/W35)** / 5,3 5,4 5,4 5,4 5,6
Heating power / Rated power  (W10/W45)** kW 6,2/1,59 8,0/1,95 11,1/2,71 13,7/3,26 16,8/3,91
COP (W10/W45)** / 3,9 4,1 4,1 4,2 4,3
Heating power / Rated power  (W10/W55)** kW 5,8/2,0 7,7/2,52 10,6/3,46 13,0/4,19 16,0/4,89
COP (W10/W55)** / 2,9 3,1 3,1 3,1 3,3

** Measured for parameters water-water W10/W35-55; according to standard EN 14511.

HP WW 12 - Comparison of rated power and heating power at different source temperatures (ground water temperature)

13 kW | heating water up to 35°C

Source temperature °C 7 10 15 25
Rated power kW 2,3 2,3 2,4 2,5
Heating power kW 11,8 12,9 14,8 18,6
COP / 5,2 5,6 6,3 7,4

13 kW | heating water up to 55°C

Source temperature °C 7 10 15 25
Rated power kW 3,2  3,2 3,3 3,3
Heating power kW 10,8 11,8 13,5 17,0
COP / 3,4 3,6 4,1 5,1