New type of energy efficient heat exchanger for indirectly cooled display cabinets - Laboratory and field tests

• In this study, a completely new type of air-to-liquid heat exchanger, adapted for obtaining good heat transfer performance even at a laminar flow regime on the liquid side has been evaluated in a display cabinet application. The heat exchanger consists of parallel plates, with liquid in every second passage and air in the other passages. Tests were performed with a traditional open vertical display cabinet, first with a traditional finned-tube coil and thereafter with the new type of heat exchanger, both in a climate chamber and thereafter in the field. The results from both tests showed that the liquid inlet temperature could be increased by around 6°C, from the range -8°C - -7°C with the traditional coil to the range -2°C -1°C with the new type of heat exchanger, which can lead to considerable energy savings and operation without the need for defrosting of the heat exchanger.

Nyckelord

Display cabinet

Heat exchanger

Indirect cooling

Laminar flow

Chains

Energy conservation

Energy efficiency

Heat transfer

IIR filters

Liquids

Sustainable development

Woodworking

Climate chambers

Energy efficient

Heat transfer performance

Laminar flow regimes

Liquid inlet temperature

Parallel plates

Heat exchangers

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