MICROCHANNEL TECHNOLOGY

Microchannel evaporators

Brazed aluminium microchannel evaporators for direct expansion and heat pump applications

PRODUCT OVERVIEW

Microchannel heat exchangers adopted for evaporator and heat pump applications

In 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 multi-port microchannel tubes, and counteracts the effects of outlet manifold pressure drop.

Refrigerant distributor of the microchannel 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.

Features and benefits

The new generation microchannel evaporator significantly differs from other types in many ways, including the following features:

 

  • Liquid/gas separation of fluid delivered to the distributor

  • Weir arrangement to facilitate refrigerant injection into the orifices

  • Directional control of the refrigerant flow to the inlet manifold and to the multiport microchannel tubes

  • Secondary openings to create a pressure drop to spread out the refrigerant evenly across the length of the manifold

  • Ternary openings to inject refrigerant into the tube chambers

  • Isolation of each microchannel tube as secondary chambers to prevent refrigerant flow between the microchannel tubes

  • Special surface geometry for capturing and holding refrigerant to feed microchannel tubes

  • Evaporator design permits refrigerant to flow in both directions for use in reversible heat pumps

Product 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 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 temperature, airflow and air temperature and other critical variables in refrigeration systems.

PRODUCT SPECIFICATIONS

Width

80-2400mm

Height

80-2400mm

Tube width

48mm

Fin type

Louvered

Fin pitch

24FPI

Design pressure

45 bar

Refrigerants

HFC/HFO/Natural

Protective coatings

E-coating

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Kaltra Innovativtechnik GmbH


Max-Reger-Str. 44
90571 Schwaig
Germany


Email: info@kaltra.de
+49(0)911 715 32021

VAT: DE300943964

Kaltra is a customer-focused developer and supplier of reliable, energy efficient thermal management equipment and solutions.

 

From the professionalism of our research and development engineers to the wide experience of our service team, we are dedicated to delivering you the best service possible.

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