Pack less Refrigerant Heat exchangers

Description

✨ Key Design and Performance Features

The high performance of Packless exchangers is attributed to their patented design:

• Coaxial “Tube-in-Tube” Design: The exchangers use a concentric design where the refrigerant vapor flows through the inner tube and the liquid refrigerant flows in the annulus (the space between the inner and outer tubes).⁴
• Convoluted Inner Tube: The inner tube is manufactured in a patented process that makes it convoluted (corrugated/helical).⁵ This is the key feature that:
  • Significantly increases the heat transfer surface area in a compact size.
  • Imparts turbulence to both the liquid and vapor refrigerant flows, enhancing the thermal performance (heat transfer coefficient).
• Counterflow Arrangement: The heat exchangers are designed for a counterflow direction (the two fluids flow in opposite directions), which provides the greatest mean temperature difference and yields optimum heat transfer.
• Connections: Each unit is furnished with ¹{ID} sweat connections on both the vapor and liquid sides for easy installation.
  1. Liquid Subcooling: The hot liquid refrigerant is subcooled before it enters the $\text{TXV}$ (Thermostatic Expansion Valve), which prevents flash gas in the liquid line and improves the $\text{TXV}$‘s performance.
  2. Vapor Superheating: Any residual liquid in the suction line is evaporated, and the vapor refrigerant is superheated before entering the compressor.
  3. Compressor Protection: Eliminating liquid refrigerant from the suction line prevents liquid slugging, which can severely damage the compressor.
  4. Efficiency Boost: The subcooling and superheating processes together provide a small increase to system refrigerating capacity (though selection should avoid oversizing which could lead to excessively high return gas temperature).