Condenser Fan Upgrade
The retrofit of aerodynamically designed high efficiency EC condenser fans can reduce refrigeration energy consumption by 10-20%.
Heat rejection is critical to refrigeration efficiency, most air-cooled condensers are compromised by both fan design and control, this reduces efficiency and increases energy consumption, particularly if low noise fans have been specified.
The replacement of existing AC fans with high efficiency EC fans improves airflow through the condenser, increasing heat rejection and refrigeration efficiency, while overcoming many issues with operation at high ambient temperatures.
Typical condenser control is achieved by cycling fans on and off to maintain the required discharge pressure, this means that for example with an 8 fan condenser 4 fans could operate to achieve the required condition, however only 50% of the condenser is being utilised.
EC fans can be efficiently speed controlled from 0 – 100 %, this allows all fans to operate simultaneously drawing air through the entire condenser while operating efficiently at low speed.
Many condensers suffer from short circuiting, where hot air leaving the condenser is drawn back into the inlet, this is often caused by low efficiency fans or obstructions which prevent heat rejection, this effect will further reduce efficiency and often result in the refrigeration system struggling to maintain the required conditions during peak summer temperatures. The aerodynamic design of replacement EC fans increases airflow while projecting air further away from the condenser to overcome short circuiting and improve both efficiency and resilience.