Microchannel Evaporators

  • MICROCHANNEL EVAPORATORS

    Brazed aluminium microchannel evaporators for direct expansion and heat pump applications

    Microchannel heat exchanger

MICROCHANNEL HEAT EXCHANGERS ADOPTED FOR EVAPORATOR AND HEAT PUMP APPLICATIONS

In our microchannel evaporators, an internal refrigerant distributor is used in combination with vertical microchannel tube orientation and oversized manifolds. This provides optimum thermal performance over a wide range of operating conditions and design issues, ensures uniform refrigerant distribution in the inlet manifold and equal refrigerant injection across all the multiport microchannel tubes, and counteracts the effects of outlet manifold pressure drop. Additionally, vertical tube orientation ensures free condensate runoff.

​Refrigerant distributor of the evaporator can be operated in reverse refrigerant flow for heating duty in the heat pumps and by using switching valves that allow the same microchannel evaporator to then be used as a condenser for heating operation.

1
2
3
4
5
6
Microchannel evaporator

EVAPORATOR DESIGN

The new generation microchannel evaporator significantly differs from other types in many ways; its construction includes the following elements:

  1. Parallel microchannel tubes and fin strips, selected individually as per customer requirements
  2. Inlet manifold with an integrated refrigerant distributor providing even refrigerant distribution across the microchannel tubes
  3. Outlet manifold
  4. Refrigerant inlet and outlet connections
  5. Reinforcement bars
  6. Mounting studs

FEATURES AND ADVANTAGES

Our evaporator coils have been designed for high performance and efficiency to cope with sensible and latent heat. Design versatility allows operating this type of heat exchangers in reverse as a condenser.

LESS REFRIGERANT CHARGE

MCHE
RTPF

SMALLER FINNED AREA

MCHE
RTPF

LOWER WEIGHT

MCHE
RTPF
1
2
3
4
DX distributor

Refrigerant Distributor: How It Works

The primary function of the DX distributor integrated into the inlet manifold of the evaporator coil is uniform refrigerant spreading across the length of the coil, over a wide range of operating conditions and equipment designs. The distributor provides:

  1. Liquid/gas separation of the mixture delivered to the distributor
  2. Injection of liquid refrigerant into distributor orifices and creation of pressure drop to propel the refrigerant and to spread out the liquid substantially evenly along the length of the inlet manifold
  3. Injection of liquid refrigerant into the tube chambers
  4. Prevention of refrigerant flow between refrigerant tube chambers before entering the microchannel tube ports
Selection software

SELECTION SOFTWARE

MCHE selection software includes condenser, evaporator, heat pump, and water coils, making it a complete selection and calculation tool for refrigeration professionals.

The software provides selections and ratings for microchannel heat exchangers which enables the user to select the best-suited product based on several deciding parameters such as heat exchanger application, cooling capacity, refrigerant, evaporation and condensation temperatures, airflow and air temperature and other critical variables in refrigeration systems.

PRODUCT SPECIFICATIONS

Max width [mm]

50 … 2400

Max height [mm]

50 … 2400

Tube width [mm]

12/16/20/25/32/36

Manifold diameter [mm]

16/20/25/30/32/38/42/50

Fin types

FLAT/LOUVERED

Fin pitches [FPI]

10/16/18/19/21/23/24/BY REQUEST

Design pressure [bar]

32/45

Refrigerants

HFC/HFO/NATURAL

Protective coatings

E-COATING/TCP-COATING

Refrigerant distributor

Optimization of refrigerant distribution for microchannel evaporators

Microchannel evaporators with optimized manifold design: uniform refrigerant distribution, improved heat transfer, higher capacity.
E-coated microchannel coil

Heat exchanger protection with electrocoating

Electrocoating offers extremely high corrosion resistance for all-aluminum microchannel heat exchangers, making them the most suitable solution for use in extra-corrosive environments.
Serpentine coil

Serpentine coils for compact cooling systems

Microchannel serpentine coils for condenser and evaporator use: low-charge, compatible with HFC/HFO and natural refrigerants, suitable for any applications
Microchannel heat exchanger

Microchannel heat exchangers as an advanced alternative to traditional HVAC coils

Advantages and benefits of new-generation microchannel heat exchangers for HVAC applications in comparison to traditional finned tube heat exchangers.
Precision air conditioner

Technology rally: microchannel vs. finned tube evaporator

A comparison for precision air conditioning system with finned tube evaporator and the system with microchannel evaporator: performance and ergonomic acpects.
Microchannel coil

Corrosion protection for microchannel heat exchangers

Corrosion resistance of the microchannel heat exchangers in highly polluted environments; protective coatings and special treatments.
Microchannel evaporator

Alcoil receives U.S. and international patents for microchannel evaporator design

Alcoil announces the issuance of US and European patents, which relates to an improved and advanced microchannel evaporator design.