-25 ℃ Water Cooled Water Chiller Unit For HVAC Industry

Water Chiller​ Features
1. Twin screw compressor brand is employed, with high efficiency, low noise level, less wearing and long operation time.

2. Four stage volume control or 0%-100% automatic regulation.

3. Use PLC microcomputer control from Germany SIEMENS. LCD touch screen, both English and Chinese human-machina intertace.

4. Complete breakdown protection: high and low pressure protection, air discharge protection, oil level protection, water flow protection, reverse and lack phase protection, chilled water anti-freezing protection, cooling water overheat protection.

5. Wider range of varibale chilled water temperature to meet the low temperature industrial requirements.

Product options

1. Salt water evaporator

2. Stepless energy regulation

3. Pump/Cooling tower control

4. Special power supply

5. Remote communication connector

Product specfication

Refrigerant: R22/R407C

Evaporator max water pressure drop: 1.0Mpa

Evaporator: fouling factor 0.018m².℃/KW

Condenser: fouling factor 0.044m².℃/KW

Power supply: 380V/3P/50Hz

Allowable voltage fluctuate: ±5%

Allowable frequency fluctuate: ±2%

Compressor

Select semi-closed 5:6 asymmetric twin-screw compressor from world-renowned brand. The possibility of shaft seal leakage is zero. Using a rotating exhaust design, the lastest development of the fourth generation line, optimize the circumference speed, excellent design of gear so that the unit has higher compression efficiency. Motor chamber compression chamber integrally cast, high precision. Double pressure compensated rotor housing, very strong, no expansion even in the state of high pressure, and it effectively reduces the noise.

Heat exchanger

The condenser and evaporator of this series unit adopts shell and tube heat exchanger, using new high efficient heat exchanger structure. Heat exchanger adopts the most advanced and effcient heat exchanger tube bundle with unique geometric characteristics and enhanced tube nucleate boiling required vaporization core, strengthen the fluid in the tube and delay perturbationat the same time, the water side fouling, heat transfer enhanment, the inside wall in order to get the best performace, comparade to the previous design, the unique design of the heat transfer efficiency is increased by 30%.

Evaporator evapotation tube with inner grooved on outer concave tooth enhanced heat transfer technology, condenser tube with inner grooved cutter teeth technology, improves the evaporator and condenser heat transfer efficiency and the evaporation temperature, and improve the energy efficiency ratio for the unit.

PLC

A good Chinese-English interactive interface is to achieve automatic control function before the LCD display real-time statues of the machine work, precise monitoring unit operating at optimun state, the touch pannel sealed, waterproof, dustproof, corrosion-resistant, long-key life. Equipped with cooling pumps, cooling water pumps and cooling tower fan interlock control function.

Water cooled screw chiller(single compressor) -25℃ technical parameter​:

Cooling condition: Chilled water inlet/outlet temperature -20/-25 ℃, cooling water inlet/outlet temperature 30/35 ℃

Temparature term: Chilled water outlet temperature range -27~-17 ℃, cooling water inlet temperature range 19~33 ℃

Chilled water side should be added by 27% glycol water or 20% calcium chloride as anti-free