Product Overview

The MRSC series flooded-type water-cooled screw chillers are a medium-to-high efficiency range of chillers meticulously designed by MONCHRUI in response to global energy conservation and emission reduction requirements, targeting both the Chinese and global markets. The entire series adopts a stable and highly efficient flooded evaporator combined with precise control of the electronic expansion valve, ensuring that the unit achieves maximum energy-saving performance at both 100% load and partial load conditions. The series is designed with R134a environmentally friendly refrigerant, which has zero ozone depletion potential, and can be widely used in new and renovated industrial and civil buildings.

Single Screw Compressor Technology

A single screw compressor is a positive displacement compressor that increases the pressure level by compressing the refrigerant volume. The single screw compressor features a very low number of moving parts. The main rotor is driven directly by the motor and meshes with two completely symmetrical star rotors to form the compression cycle. As the main rotor rotates, it freely drives the star rotors to turn. This keeps the main rotor in good balance both radially and axially, which greatly enhances the compressor's reliability and service life. Furthermore, it results in very low vibration levels and low acoustic values.

Flooded Evaporator

In a flooded evaporator, the refrigerant boils and evaporates on the outside of the tubes, while the secondary coolant (chilled water) flows inside the tubes. This design allows the heat transfer tubes to be completely immersed in the liquid refrigerant, with the entire tube surface participating in the heat exchange process.

Compared to a dry-expansion evaporator (where the refrigerant evaporates inside the tubes and water flows outside), the flooded evaporator achieves a significantly higher heat transfer coefficient.

Due to its superior heat transfer efficiency, the refrigerant evaporation temperature can be kept very close to the leaving chilled water temperature. This smaller approach temperature means that the evaporator can produce the same chilled water temperature using a higher evaporation temperature, or alternatively, produce colder water using the same evaporation temperature. As a result, both the system’s Coefficient of Performance (COP) and its cooling capacity are improved.