![]() ![]() Given the inefficiencies of the Peltier system, thermoelectric cooling is generally severely lacking in temperature pull-down capacity versus compressor cooling systems. ![]() Wine storage and preservation is about consistent temperatures and control at all times. More costly to run as it is not as efficient as the vapour-compression systems (in terms of coefficient of performance.Generally only around 10-15% as efficient as the ideal refrigerator (Carnot cycle), compared to 40-60% achieved by conventional compression cycle systems (vapour compression).Not effective outside its very limited operating ambient temperatures.Limited temperature pull-down capability.Cheaper to manufacture, and less labour-intensive to install.Peltier – no moving parts, fluid or refrigerants.Fans are generally used to distribute the cool air throughout the cabinet. It is obviously the cooling side that is important in refrigeration. The device has two sides and when DC (direct current) flows through the device, it brings heat from one side to the other, so that one side gets cooler while the other side gets hotter. Thermoelectric cooling uses the Peltier effect to create a heat flux between the junction of two different types of materials. During this time compressors have continued to improve in terms of performance, quietness and energy-efficiency. ![]() With regard to performance however, there are no major disadvantages with compressor systems as they are a proven technology that has been around for about a hundred years. Generally more expensive than thermoelectric systems, and are more labour-intensive to manufacture and install.Modular and individual parts means replacement is possible if required.Easily serviced by any competent refrigeration service engineer.Consistent temperatures and better control of temperature.Internal fans are used in some cabinets to maintain uniform internal temperatures, while others use external fans to blow heat away from the compressor.Ĭompressors can be equipped with many different types of refrigerant gases, some of which are more energy-efficient than others, for example R600a which also has zero ozone-depleting properties. This is to avoid any transmission of vibrations to the wine. In a good setup, the compressor should be mounted on the body of the wine cabinet and secured by means of rubber shock pads that absorb vibrations. To achieve cooling, the compressor pumps a refrigerant gas through the refrigeration system, which is composed of many elements including evaporators and condensers. The latter are more frequently found on “wine chillers” or “coolers”. Wine storage cabinets are generally equipped with compressors (which use vapour compression to achieve desired temperatures) rather than with thermoelectric systems. ![]() NOTE: We’ve had this comparison checked and signed off by a third-party refrigeration engineer to ensure validity of all information outlined. However, both systems are available on the market and there are some exceptions to the rule, so we have laid out below for you the main pros and cons of each system to help you can make an informed choice. This is crucial for your wine because stable temperature is the most important factor in wine storage. The main reason for this is that compressors are much more capable and efficient at maintaining stable temperature even when external temperatures fluctuate. This applies to both cellaring and serving cabinets.
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