Heat Pumps. Air/water or Geothermal Climate Systems

NEW
 
Stand Alone Heat Pump Water Heater

NUOS FS
Floor Standing Unvented Cylinder
With Integrated Air Source Heat Pump

The NUOS Domestic Hot water Heat Pump is an ‘air to water' heat pump and cylinder with a primary heat transfer coil and secondary electric element, combined in a single unit with intelligent controls. Designed for installation within a bathroom or kitchen, NUOS resembles a more traditional regular wall-hung electric water heating cylinder, both in terms of appearance and installation procedure. However, when comparing the difference in operating efficiency, energy savings of up to 67% can be achieved via the integral heat pump. Although air source heat pumps use energy to operate, usually electricity, the output produced compared to the input, known as the CoP (Coefficient of Performance) is typically tripled.

So How Does it Work?
 
The heat from the ambient air initiates a reverse refrigeration cycle within the heat pump which collects heat energy present in the air and stores it via a vapour compression cycle. As a fan pulls the outside air over the heat exchanger within the NUOS unit, heat from the air raises the temperature of the refrigerant within the heat exchanger, changing it from a liquid state into a vapour. This is then compressed to a higher pressure and temperature, before entering the condenser that is coiled within the NUOS cylinder. The condenser operates in virtually the same way as a calorifier by transferring the heat energy from the vapour into the water store. Once the vapour has lost its heat, it is passed through an expansion valve within the heat pump and returns to its original form, ready to restart the cycle.

Something for nothing
 
This process will heat the temperature of the stored water to 55°C, achieving an impressive CoP of around 3.0, e.g., 300W of electricity producing 900W of useful heat. With two thirds of the useful energy coming from ambient air, NUOS domestic hot water heat pumps are an attractive renewable option, particularly in off gas areas

Intelligent Control
 
The NUOS intelligent control technology calculates electronically when to begin the heat pump cycle in order to achieve the desired temperature exactly at the programmed time. It does this by monitoring the air temperature and the temperature of the water already in the cylinder, calculating automatically the input necessary to raise the water to the set temperature.
 
The NUOS is capable of heating water to 55°C but for those occasions when hot water is required quickly or more water is being used at one time, these appliances have an integral 1.5kW back up heating element which can be used to ‘top up' the water temperature, if necessary. Alternatively, both heat pump and heating element can function together to give even faster recovery. Although this is naturally a less energy efficient option, it is still around 30% more efficient than a standard electric water heater.
 
Once the system has reached temperature, the fast mode is automatically deactivated, preventing accidental prolonged use of the immersion when not required. Periodically, an anti-bacterial function boosts the temperature of the water in the cylinder to just above 60°C to pasteurise the system.