Subscribe to the daily news Sign in
En
Kaltra’s optimized microchannel evaporator

Kaltra’s optimized microchannel evaporator

The Kaltra’s research center completes work on the streamlined microchannel evaporator design that displays amplified performance under partial load conditions. Evaporator’s outlet manifold was subjected to optimization to achieve optimum refrigerant distribution between multiport tubes.

The resulting design includes intermediate manifold and outlet manifold – this ensures pressure drop balance within the coil and contributes to uniform distribution of incoming gas/fluid mixture among tubes regardless of load demand (starting from about 15% load). Distributor located inside inlet manifold prevents the gaseous refrigerant from entering microchannel tubes, creating almost single-phase heat exchange. Thus, maldistribution is only due to the asymmetric pressure losses in inlet and outlet manifolds. Large-volume outlet header levels local pressure drops, eliminating uneven, pressure-induced liquid distribution. This novel design is still suitable for large coils having long manifolds and can operate at any installation angle except horizontal or close to it.

Inlet manifold remained unchanged with inbuilt distributor tube with orifices, as well as common coil configuration with vertically-oriented microchannel tubes (ensuring free condensate removal).

The performance of evaporator coils of the present design has been tested in the field, confirming the results of numerical simulations and theoretical expectations. As almost the entire finned surface is used for evaporation, new evaporators demonstrate efficiency not found elsewhere in other designs.
Related tags: evaporator
Share

Related news

Sanhua launches stainless steel FDF-G solenoid valve for HVACR systems
Sanhua has introduced the FDF-G solenoid valve, a new lead-free, stainless steel component designed for use in refrigeration, air conditioning, and heat pump systems. The valve is compatible wi...
17 Jul 2025
Danfoss launches DST G290 propane gas sensor with photoacoustic tec...
Danfoss Sensing Solutions has introduced the DST G290 Gas Sensor series for use in HVAC and commercial refrigeration systems operating with propane (R290) refrigerant. The new sensors utilize...
15 May 2025
Sanhua Adds Seven BPHE Models to Expand Stainless Steel Range
Sanhua has expanded its brazed plate heat exchanger (BPHE) product line with the launch of seven new models: S6C, B12, S20D, S65A, S114A, S120, and S200. These additions support a range of HVAC and...
16 Jun 2025
Danfoss launches Universal TR6 valve compatible with R-410A and low...
Danfoss has introduced the Universal TR6 Thermostatic Expansion Valve, designed to simplify inventory and installation processes for HVAC contractors and wholesalers. The new valve is compatible wi...
10 Jul 2025
Fieldpiece launches DRX3 leak detector for refrigerant and gas systems
Fieldpiece Instruments has introduced the DRX3, a new leak detector designed to identify a wide range of refrigerants and combustible gases with a single sensor. The tool is intended for use across...
14 Jul 2025
Embraco Launches Atom, Its Most Compact Variable-Speed Compressor
New 2.5 kg model debuts at AWE 2025, aiming to expand access to energy-efficient technology. Embraco, a brand of Nidec Global Appliance, introduced its most compact variable-speed comp...
29 Apr 2025