SMART TECHNOLOGY Technology-based solutions are often a good way of ensuring the system operates in proportion to the heat loading it faces. By using inverter-driven motors, for example, supermarkets can balance their cooling demands with the costs of running the system. Although it is still early days for control systems in small-to-medium sized systems, a number of solutions are already available to ensure refrigeration equipment works efficiently at all times and can respond rapidly to changes in the environment - such as an influx of shoppers in a supermarket or high ambient temperatures.
Another way to increase system efficiency is by reusing excess heat, or cool air that would normally go to waste. Heat recovery from cooling systems is a common practice in many countries where heat rejected by the condenser is used to provide hot water or for heating air for use in other parts of a building. It is a feature in many home air conditioning units and in supermarkets in the US; it is gaining popularity in other areas of the world.
Most heat recovery is based on a passive heat exchanger technology and requires relatively little additional energy-consuming equipment. Alternatively, heat pumps are an even more effective heat recovery option. This technology is often used to improve the quality of the recovered heat, but the additional capital costs in comparison with passive recovery means they are more likely to appropriate for larger energy consumers than in domestic systems.
There are many measures end users can take to improve the efficiency of their systems. By combining sensible commissioning, preventative maintenance and smart technology, refrigeration OEMs, contractors and end users can make their systems more efficient, more sustainable and less expensive to operate. Taken together, this allows users to keep calm, safe in the knowledge they have reduced the risk of downtime to a minimum.
www.mexichemfluor.com twitter.com/TomorrowsEM REFRIGERATION | 31
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