An Edson heat pump can help reduce energy usage over time and reduce carbon emissions. Our Heat Pumps are designed to the highest quality using superior components including Copeland Scroll Compressors and Ziehlebm fans. The combination of these technologies provides a quieter unit without compromising reliability and efficiency.
The evaporator consists of inner-grooved rifle bore copper tubes, which significantly increase heat transfer by up to 20% over smooth bore tubing. Slit aluminium fins provide even greater transfer of heat from the air to the refrigerant. Copper tubes with aluminium fins offer the best balance between cost and heat transfer capabilities. The evaporator coil is epoxy coated for enduring protection from corrosion.
Coefficient of Performance (COP) varies depending on ambient air conditions. Edson hot water heat pumps average a COP of over 4 which means more than 75% of the energy used to produce hot water is free.
Our standard units have a Single Wall Heat Exchanger. Heat exchanger upgrade options include double wall (vented) tube in tube /coaxial and double wall stainless steel flat plate heat exchangers, providing an inbuilt safety mechanism that prevents potential cross contamination of refrigerant into potable water. Water and refrigerant circulate in separate tubes with an air gap separating them.
Refrigerant Gases – Typical units are manufactured using Synthetic Refrigerant Gases which although they have a Zero Ozone Deletion Ratio, they have high Global Warming Potential – e.g. R134a has a Global Warming Potential of 1,430. Edson also offers its range of Heat Pumps utilising Natural Refrigerant Gases which have a Global Warming Potential as low as one (1) – a vast difference to 1,430. There are also significant energy efficiency gains when using Natural Refrigerant Gases.
Refrigerant heat recovery or de-superheating is available in our Edson heat pumps to provide hot water for secondary application. Heat recovery units are also available for direct connection to refrigeration plant, ranging from air conditioning units to large scale central plant.
Air to Water Heat Pumps
A heat pump transfers heat from air to water, using electricity to drive the compressor and the fan rather than a traditional electric resistance water heater that uses electricity to directly heat the water. This results in a highly efficient transfer of energy, dependent on the ambient temperature, and is faster at higher temperatures, however heat gain is even made in sub zero temperatures or overnight, providing the potential for year round heating.
Ground Source Heat Pumps
A Ground Source Heat Pump uses the ground as a heat source in winter or heat sink in summer to moderate the temperature of the buildings on it. It transfers heat from water within the ground heat exchanger to water inside the building.