Farnek rolls out system to save building energy

Facilities management company, Farnek Avireal, has launched an energy-saving module (ESM) - System 4000.

Facilities management company, Farnek Avireal, has launched an energy-saving module (ESM) - System 4000. The solution is designed to reduce the electricity consumption and maximum demand of refrigeration and air conditioning systems in order to benefit building owners and the environment.

System 4000 reduces electricity consumption by improving system performance and maintaining temperature control, which during recent field trials in Dubai, achieved savings of between 15 and 25%.

Markus Oberlin, general manager, Avireal Middle East, said: "ESM interfaces with all types and makes of air conditioning and refrigeration controllers, from the simple thermostat single condensing systems, to the most sophisticated computer based multiple compressor parallel systems."

Temperatures in buildings vary during the day and offices full of personnel compressors need to work harder to maintain a fixed temperature.

Conventional controls, even on the most sophisticated A/C and refrigeration systems, only operate when they reach fixed absolute values, which in turn switch compressors on or off or simply adjusts capacity.

Building maintenance engineers can set the desired temperature using a range of values called 'dead band' above and below the average temperature they wish to achieve. This avoids the compressors stopping and starting too often as the temperature fluctuates during the night and day, and ultimately prolongs their life.

The ESM microcomputer records the absolute switching values of the primary controller and also measures the rate of change of both the rise and fall of temperatures during the operating cycle of the compressors.

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