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Energy Efficient Chiller Plant

Ever-increasing fuel prices and the climate change levy are putting both the building management and the process industry under increasing pressure to reduce operating costs. When you consider that the air conditioning in a typical office accounts for approximately one third of annual electricity consumption, it is increasingly important that when new equipment is installed the most energy efficient options are considered.

Powermaster can help you with the forward planning and installation of your new refrigeration or HVAC plant and advise you on the best approach to achieving your required capacity and improving energy efficiencies.

The latest legislation concerning R22 refrigerant means that many companies are looking at renewing their refrigeration plant and using the opportunity to greatly improve the energy efficiency of their existing system. However, selecting the most energy efficient chiller for the job requires careful consideration.


When selecting a process chiller the Energy Efficiency Ratio (EER) or COP are a measure of how efficiently a cooling system will operate at a specific condition. In technical terms, EER is the steady-state rate of heat energy removal (i.e. cooling capacity) by the product measured in divided by the steady-state rate of energy input to the product measured in watts. This ratio between the two gives you the EER or COP. The higher the EER or COP the more efficient the chiller.

When considering a chiller for an air condition application the Seasonal Energy Efficiency Ratio (SEER), is most commonly used. It measures how efficiently a cooling system will operate over an entire season. The higher the SEER, the more efficient the chiller. Technically speaking, SEER is a measure of the total cooling of a chiller during the normal cooling season as compared to the total electric energy input (in watt-hours) consumed during the same period.


Both SEER and EER indicate the energy efficiency of the product under different operating modes. SEER rating more accurately reflects overall system efficiency on a seasonal basis and EER reflects the system’s energy efficiency at peak operational conditions. Both ratings are important when choosing a product.

When examining a chiller’s EER and ESEER customers should also ensure they establish the integrity of the energy efficiency data published in manufacturers’ literature. Eurovent, the European Committee of Air Handling and Refrigeration Equipment Manufacturers, has set its own formulae to calculate EERs, making it easier to compare the performance of chillers manufactured by Eurovent accredited companies. Eurovent has also established its own classification for full load EER. All Powermaster Climaveneta chillers are Eurovent certified.

Climaveneta are European leaders in chiller design and innovation with a huge range of energy efficient chillers utilising energy saving technology such as:

Turbocor Compressors: The Turbocor compressor is the revolutionary heat of the Powermaster Climaveneta TECS range of water chillers. The Turbocor is a revolutionary oil free centrifugal compressor equipped with a turbine having magnetic bearings and digital impeller speed control. As well as unprecedented ESEER and EER figures the Turbocor is 1/5 of the weight of an equivalent screw machine. It is so quiet that with typical background noise you can hardly hear it run and it redefines soft start with a very low starting current (2 amps/soft start) instead of 500-600amps for a screw compressor with the same capacity.

Freecooling: Free cooling is where you utilise the low outside air temperature for chilling water in your process or air conditioning, rather than part or all of your air-cooled chiller plant. In summer the chiller acts in the same way as a traditional electric chiller, meaning the compressors are running. in the mid season it is possible to reduce the operation of the compressor thanks to the water pre-cooling in the free-cooling coil. In winter operation the water is completely chilled in the freecooling coil, thus keeping electric energy consumption to a minimum.

Heat Recovery: Both Scroll and Screw compressor ranges in the Climaveneta range are available with full or partial heat recovery enabling water temperature as high as 55°C

Full Inverter Control: A refrigerated process or HVACR plant is always a complex system. The composite parts are inter-dependent. Only the global synergy amongst the single components allows the actual performance of the system. With i-FOCS from Climaveneta the approach to energy efficiency becomes system-oriented. Each part features high efficiency at the most frequent conditions of utilization. The benefits achievable with the i-FOCS chillers exceed the specific efficiencies of the single components: the evolved control logic by Climaveneta, regulate compressors, fans, pumps in synergy.

Energy Efficient chillers - Turbocor - Freecooling - R22 Refrigerant - Process cooling -