How Heat Pumps Work?

A Heat Pump is like a reverse fridge and uses electricity to operate. The free heat is extracted from the ambient air, upgraded with a compressor, and then pumped to the water. Therefore, it is very cost effective to heat the required pool water needed for the swimming pool even in the colder months of the year, as the electrical input is not to generate heat but just to move the free heat to the water, no matter what the weather
condition is. Due to their high efficiency, “Performance Plus” heat pumps have a low.

 

How Heat Pumps Work?
Compressor

Compressors make up a vast majority of the energy used in heat pumps. Therefore, compressor selection is very important to improving the overall efficiency of any pool or other applications heat pumps. Almost all of heat pumps are fitted with super efficient and reliable Copeland Scroll Compressors.

They are one of the mos t rel i able compressors available. Copeland Scroll Compressors’ patented scroll design features:

“Performance Plus”Heat Exchangers

heat exchangerThe titanium tube heat exchanger assembly has been developed from years of hands on experience and dedication to gain the technology we now put into each heat exchanger. Each Heat Exchanger is individually sized to meet the capacities of each individual heat pump. This is achieved by manufacturing the complete heat exchanger here at HWHP Ltd. As swimming pools have high volume filtration systems “Performance Plus” heat exchanger cases are also designed for high volumes and in most cases can handle the full volume of the filtration system with only a minimal pressure drop or by adding approximately 10 kpa onto the filters operating pressure. An extra water pump to operate the heat pump is not normally required offering a further reduction in heating costs. In New Zealand Hot Water Heat Pumps Ltd offers a 30 year limited warranty against corrosion of the titanium tube within the heat exchanger, regardless of the pools chemistry. (Some warranties are subject to proper pool chemistry beingmaintained.)

Flow Switch

flow switchEach “Performance Plus” Heat Pump is equipped with our unique water flow switch, which allows the heat pump to operate automatically with the pool filtration system.

Temperature Sensor Assembly

temperature sensor“Performance Plus” Heat Pumps are fitted with a temperature sensor, sensing the pool water temperature entering the heat exchanger.

Some models are supplied with an external temperature sensor assembly for an onsite installation.

Temperature control

temperature control Temperature control is by an electronic temperature controller with temperature readout in tenths of a degree. (Whole degrees are too inaccurate.) The pools temperature is maintained within 0.5 degrees Celsius, 0.2 if requested.

Evaporator

The aluminum fins of the evaporator are epoxy coated for extra protection in corrosive environments such as salt laden sea air and highly corrosive chlorinated air. The fins are mechanically expanded onto rifled copper tubes for better heat transfer.

Evaporator Fin Spray Test

0 hrs

500 hrs

1000 hrs

Aluminium
aluminium 0hr aluminium 500hr aluminium 1000hr
Anodyne Etch Treated Aluminium
anodyne 0hr anodyne 500hr anodyne 1000hr
Copper
copper 0hr copper 500hr copper 1000hr
Epoxy Coated
epoxy 0hr copper 500hr copper 1000hr

 

Refrigerant Control

The refrigerant is controlled by bi‐directional thermostatic expansion (TX) valve finely tuned for optimum performance. It also controls the refrigerant flow when in reverse cycle defrosting during low ambient operation.

Cabinet

cabinetThe units cabinet and drain tray are constructed from high grade galvanized steel and polyester powder coated for increased durability.

External fasteners are stainless steel.

Features:

  • Built In flow switch.
  • Built in temperature sensor.
  • 3 speed low noise level direct drive propeller fans with guards.
  • Thermostatic expansion valve for optimum refrigerant control all year round.
  • Epoxy coated evaporator coils
  • Individually sized titanium tube heat exchanger for each model
  • Molded polyethylene heat exchanger case with heavy duty end plates.
  • Reverse cycle de‐ice standard on all models.
  • Rubber mounting pads for positioning under heat pump feet.

» Benefits of Heat Pumps?