انواع اواپراتور Evaporator

The evaporator is one of the most critical components in any refrigeration or HVAC system. It is where the refrigerant absorbs heat from indoor air or a process fluid, transforming from a low-pressure liquid into vapor. This process provides cooling for comfort or industrial needs.

Clivet, as a leader in advanced HVAC technology, offers various systems that utilize different evaporator types—optimized for energy efficiency, performance, and environmental impact.

How an Evaporator Works

An evaporator operates on the principle of heat exchange:

• Low-pressure refrigerant enters the evaporator coils.

• It absorbs heat from surrounding air or fluid.

• The refrigerant evaporates into gas form.

• This cooled air is then circulated into the building or system.

Main Types of Evaporators in HVAC

Bare Tube Evaporators

• Design: Simple metal tubing without fins.

• Applications:

  • Industrial or fluid chilling systems

• Advantages:

  • Easy to clean

  • Used with liquids or viscous materials

• Clivet Use:

  • Rare in modern systems due to low efficiency

Finned Tube Evaporators

• Design: Tubes surrounded by metal fins to increase surface area

• Applications:

  • Air conditioners, split systems, rooftop units

• Advantages:

  • High heat transfer efficiency

  • Compact and powerful

• Clivet Example:

  • Found in ClivetPack, ELFOEnergy series and ducted split systems

Plate Evaporators (Brazed Plate or Gasketed)

• Design: Series of metal plates creating narrow flow paths

• Applications:

  • Hydronic systems, chilled water plants

• Advantages:

  • Compact design

  • High thermal efficiency

• Clivet Integration:

  • Utilized in modular chillers and hydronic systems

Shell and Tube Evaporators

• Design: Tubes inside a large shell with refrigerant or water flow

• Applications:

  • Central air conditioning, process cooling

• Advantages:

  • Durable and high-capacity

  • Handles large volumes

• Clivet Use:

  • In WSAT, WCH and high-tonnage chillers

Flooded Evaporators

• Design: Constantly filled with refrigerant that floods the tubes

• Applications:

  • High-efficiency industrial systems

• Advantages:

  • Excellent heat transfer

  • Constant surface wetting

• Drawbacks:

  • Requires more refrigerant

• Clivet Potential:

  • Used in large-capacity process cooling where efficiency is key

Dry Expansion Evaporators

• Design: Refrigerant enters partially filled and evaporates along the tube

• Applications:

  • Standard HVAC systems

• Advantages:

  • Simple design

  • Easy control with expansion valves

• Clivet Usage:

  • Widely used across Clivet’s split and packaged units

Evaporator Applications in Clivet Systems

Key Factors in Choosing an Evaporator

• Cooling capacity required

• Type of refrigerant used

• Indoor vs. outdoor air handling

• Energy efficiency targets (SEER, EER)

• System layout (VRF, Split, Chiller)

Evaporator Efficiency Tips

• Clean fins and coils regularly

• Ensure proper airflow (filter maintenance)

• Correct expansion valve calibration

• Avoid refrigerant undercharge or overcharge