1. Large Tonnage Chiller
WC Screw

2. Content
Mechanical System
Key Components
Control Logic
Application 2

3. Mechanical System 3

4. Cooling water inlet/outlet conn. & Temp. sensor
Layout
Screw Compressor
Control Panel
Cooling water inlet/outlet conn. & Temp. sensor
Shell & Tube Condenser 4

5. DX PID
Refrigerant System 5

6. Flooded PID 6

7. Key Components 7

8. Condenser
H2O
R134a
Tube

9. High Efficiency Sub-cooler
Condenser
Compact and high-efficient sub-cooler
Low-liquid flash design requires less refrigerant
Control the liquid level accurately to ensure 4.5C sub-cooling
High temperature gas in
Cold liquid out
Subcooler
High Efficiency Sub-cooler

10. Condenser

11. Condenser
Oil Sep.

12. Evaporator
R134a
Water
DX type

13. Evaporator
H2O
R134a
Flooded type

14. Evaporator
H2O
R134a
Full Falling Film type

15. Evaporator Full Falling Film Reduce 40% of refrigerant charge
25%
Flooded
Full Falling Film
Falling Film
Reduce 40% of refrigerant charge
Improved performance of oil return and heat transfer

16. Gas jet
Oil system 16

17. Sound
Velocity
Pressure
Oil System
The Venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section of pipe，with the static pressure correspondingly decreasing .

18. Oil jet

19. Oil System
Oil pump

20. Oil System Gas jet Oil jet Oil pump Features Vacuum 50 ~ 80kPa;
Low gas pressure drop;
Low price;
Piping design complicated.
Vacuum 12 ~ 20kPa;
High oil pressure drop, up to 50%;
Best stability of oil return;
High price;
Piping design simply.

21. Micro processer MIC PLC Price Cheap Expensive Function The same
Failure rate
1/10 of PLC -
Maintenance
Just replace it.
Replace it. Not only it, but also the modular;

22. Control Logic 22

23. YES
Start up 23

24. Stop 24

25. Applications 25

26. Ice/Water storage
Storage
Series System
Storage
Parallel System 26

27. Heat recovery
EVA HR
COND
EEV
45℃
40℃
35℃
30℃ 7℃
12℃
Note：
The highest HR LWT is 60 ℃ , the higher EWT, the less HR.

28. Heat pump FCU Flooded EVA Pump COND Pump Surface water system Note:
Comp
FCU
Flooded EVA
Pump
COND
Pump
Note:
Cooling: A on, B off;
Heating: A off, B on.
Surface water system 28

29. Heat pump Flooded EVA Pump COND Pump Ground Source Note:
Comp
FCU
Flooded EVA
Pump
COND
Pump
Note:
Cooling: A on, B off;
Heating: A off, B on.
Ground Source 29

30. 30

31. Thank You! 31