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Energy efficient supermarkets - Cooling technology

Food refrigeration demands a chain of refrigeration, from production to distribution, delivery and storage. From a hygienic perspective, it’s very important to maintain the right temperature level for the food throughout the cold chain, from production to consumption.

For supermarkets (shops and professional kitchens), there are two types of cooling systems, direct and indirect, both of which are energy efficient. Direct systems mean long pipes and thus larger amount of refrigerant but minimize the need of heat exchange. In indirect systems, only the pipes of the cooling unit are filled with refrigerant, which gives a much less amount of refrigerant filling. Indirect systems are a central cooling system that cools the secondary system with refrigerants that distribute the cooling effect to refrigerated furniture and chilled rooms.

When designing systems for cooling food, it is important to look at system efficiency in order to achieve low energy consumption over the year. More and more components included in the cooling system are covered by the Ecodesign Directive, which aims to make the individual components more energy efficient. An incorrectly designed system can provide an inefficient system solution, despite the use of energy-efficient components.

Heat recovery is often an energy efficient solution, but one should be observant that electricity use is increasing. The simplest way is to raise the condenser pressure in the heat exchanger high enough to be able to directly exchange the heat to the receiving heating system. Another alternative is to utilize low temperature heat from the cooling machines condensers and let a heat pump raise the temperature to a usable temperature.

Energy efficiency potential in professional kitchens - Fast Food Restaurant

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Evaluation of alternatives to R404A – the most common refrigerant in Swedish grocery stores

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Flammable Refrigerants – A survey of barriers and how to overcome them

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Heat recovery in refrigeration system by applying heat pump

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Doors on open display cabinets and modification of the refrigeration system in a supermarket

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Cleaning of heat exchangers in display cabinets

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Energy from tenant’s refrigeration system utilized in property owners heating system - a contribution towards increased energy efficiency

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Design of Refrigeration Systems for Supermarkets based on Best Available Technology

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Improved energy behavior in commercial kitchens through digital support with measurement and feedback

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Alternative to R404A

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Priority actions in existing food premises for increased energy efficiency

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Profitability potential for self-produced energy in grocery stores

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Plug-in compared with central cooling unit

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The concept supermarket approaching zero

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Dehumidification of air in supermarkets

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Evaluation of an innovative heat exchanger in an open display cabinet

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Preliminary study of energy optimization of dehumidification in grocery stores

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Innovative heat exchanger in refrigerated counters provides more efficient energy use in stores

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Heat recovery with heat pump from food refrigeration system in store

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The store that aims for zero energy

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Doors on open refrigerated counters and adaptation of refrigeration systems in stores

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Washing batteries in refrigerator and freezer furniture

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Energy efficient cooling systems in grocery stores

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Overcoming barriers to energy efficiency in grocery stores - knowledge of behavior and technology

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Exploring barriers to energy efficiency in supermarkets

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Energy efficiency potentials in professional kitchens - Restaurant kitchens

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