Space Air Solutions - Daikin Heat Pump Principles & Applications

Daikin Air To Water Heat Pump Principles - Applications

Energy Transfer Media

Many air conditioning and heat pump systems use secondary medias such as air or water to transfer energy from and to the space being conditioned. However, the transfer of energy from one media to another can result in significant efficiency losses.

Heat Reclaim Ventilation (HRV)

Efficient ventilation is a key element of the new Part F and Part L Building Regulations and Daikin’s heat recovery ventilation modules can be applied as stand alone units or incorporated within the air conditioning system. Temperature and humidity are exchanged between the supply and exhaust air, recovering potential energy losses and considerably reducing the air conditioning loads. The HRV modules feature a high efficiency VAM heat exchanger and are available in 4 models with airflow rates from 350 to 2000 m3/h and with optional DX Coil and humidity control. A c.80% heat recovery efficiency includes both latent and sensible heat energy.

Daikin Inverter Control

There are two ways to control the operation of the compressor in a direct expansion system :

• By stopping and starting (all ON or all OFF) from a signal from the room thermostat.
• By changing the frequency of the electrical supply via inverter to the compressor, hence the speed to achieve the exact cooling/heating requirement. Benefits include:

- Low start currents - Increased COP at low load
- input matched to load - Maximum energy utilisation

The frequency Inverter Control in Daikin systems reduces energy consumption by at least 30% compared to non-inverter types. The inverter improves performance relative to power input, ensures a more even room temperature and eliminates power surges and stop/start cycles.

Inverter technology maximises operating efficiency so important in these times of environmental consciousness and the need to reduce carbon emissions.

Air to Water Heat Pumps

The Space Daikin Altherma range of heat pumps are based on micro-generation heat pump technology and represents a flexible and cost effective alternative to relatively inefficient, carbon intensive fossil fuel boilers.

NEW: Daikin Altherma series for apartment buildings and collective housing known as ‘The Multi Daikin Altherma’ is able to efficiently heat water temperatures up to 70°C, with remarkable efficiency (COPs up to 3.5) because of its ability to recover the heat stored in the outdoor air.

Outdoor units extract the heat from the outdoor air, raise the temperature and transfer this heat energy to the individual indoor units. Multiple outdoor units can be installed for still larger applications.

System Controls for the Daikin Altherma System

The user interface controller features an LCD display, which indicates the water temperature, time schedules, fault history diagnostics and many other features.

It comes built in with the indoor Hydro-box and supplied lose with the mono bloc system, however, the controller can be installed remotely up to 50 metres away from the indoor unit.

The user interface controller together with system electronics provide the following:

- Manual ON/OFF

- Multi Setting 7 day time clock, with maximum 5 actions per day (heating, hot water, with different temperature settings)

- Variable set point adjustment or floating temperature

- Outdoor silent mode setting

- Automatic sanitary booster heater control at exceptional demand or legionella prevention control