What is dual refrigeration system?

In dual cooling systems, two independent refrigeration systems provide a reliable -86ºC ultra-low temperature environment. Should an unexpected failure occur in one cooling circuit, the other can maintain the freezer in the -70ºC range until service can be arranged.

How does a dual compressor work?

A dual-compressor system, as its name suggests, houses two compressors. The cooling process requires two vapor compression cycles that work in a cascade system. One is a low temperature cycle and the other is a higher temperature cycle. First, heat is removed from the freezer chamber by the first cycle.

What is a dual circuit coil?

The circuit utilizes a dual coil design that incorporates two sets of tubes into one set of fins inside each coil. This allows the two circuits to fit in the same size cabinet as a typical single circuit system.

What is a multiple evaporator refrigeration system?

A multi-evaporator system is a vapor-compression refrigeration system generally consisting of four major components: Evaporator. Compressor. Condenser. Thermal expansion valve.

Does a refrigerator have two compressors?

In refrigerators with a single compressor, cold air circulates from the one compressor throughout the entire unit, including the refrigerated compartment and the freezer compartment. In models with dual compressors, there is a separate unit and air flow for the refrigerated compartment and the freezer compartment.

Does freezer and fridge use same compressor?

The amount of ice built up in the duct stopped all air movement between the freezer compartment and the refrigerator compartment. With the exception of built-in refrigerator-freezers (e.g. Subzero), almost all refrigerator-freezer units use one compressor.

What is a dual compressor?

Dual Compressor In models with dual compressors, there is a separate unit and airflow for both the refrigerated and freezer compartment. Because air does not flow between the two compartments, there is no excess moisture and your food stays fresh longer.

What is the benefit of a dual evaporator system?

Two evaporators allow the freezer and fresh food compartments to be cooled independently. It is a parallel system which can operate each evaporator independently, or both at the same time as needed. This flexibility allows very precise cooling. The fresh food evaporator generates 37 F air for fresh food.

What is DX coil?

Evaporator coils, commonly referred to as DX (direct expansion) coils, are used to cool and/or remove moisture from air streams. A liquid-vapor mixture of refrigerant enters the coil and cools the air as it evaporates, eventually leaving the coil as a gas.

Why multi-evaporator is used?

A multiple-effect evaporator, as defined in chemical engineering, is an apparatus for efficiently using the heat from steam to evaporate water. In a multiple-effect evaporator, water is boiled in a sequence of vessels, each held at a lower pressure than the last.

How a cascade system works?

Cascade Systems A cascade system uses one refrigerant to condense the other primary refrigerant that is operating at the desired evaporator temperature. This approach is usually used for temperature levels less than −80°F, when light hydrocarbon gases or other low boiling gases and vapors are being cooled.

https://www.youtube.com/watch?v=KIcccgPIH-o