Water Chiller

• Compact and completely sealed structure, but high efficiency;
• Easy installation, operation and maintenance;
• Adopts U.S.A. or Japan compressor and electronic parts to ensure long service life;
• Adopts pipe type evaporator and condenser to enhance heat exchange efficiency;
• Equipped with thermostatic expansion valve, motor protection device, high/low pressure switch, high pressure safety valve(or fusable insert) and alarm.

• Compressor -- TECUMSEH/France (<=12Hp), Copeland/USA(<=15Hp), Danfoss Performer(<=25Hp);
• Dryer Filter, Pressure Controller -- Danfoss/Denmark (Mexico);
• Temperature Controller -- DEI/Taiwan;
• Electrics -- Schneider/Shanghai;
• Pressure Gauge -- Coconut Tree/Taiwan;
• Chilled Water Pump -- DAB/Italy.

General Specification

Refrigerant: R22.
Controller: PLC with digital LED display.
Temperature of inlet cooling water (for water cooled type only): <=32⁰C.
Temperature of circumstance (for air cooled type only): <=35⁰C.
Temperature of outlet chilled water: 5~20⁰C.
Power Supply: 380V/3p, 50Hz (or OEM).
Compressor: Swirl Rotation Type, Hermetic
Safety Device: High/low Pressure Switch, Freeze Protector, Overload Relay, etc..
Refrigerant Control: Capillary(<=KC05) or Thermostatic Expansion Valve(>KC05).

1. Why use water chiller?
   As you know, cooling time plays an important role in cycle time. Practically speaking, to use water chiller instead of (or with) cooling water tower may reduce cooling time obviously, and improve output by 20% or more.
    
2. Why choose air cooled water chiller?
   Easy startup; No need to work with extra cooling water tower.
    
3. Why choose water cooled water chiller?
   Lower cost; Better heat transfer efficiency.
    
4. How to know  real chilling capacity?
   Real chilling capacity = (theoretic chilling capacity) * (heat transfer efficiency);
   For water cooled water chiller, heat transfer efficiency is 75%;
   For air cooled water chiller, heat transfer efficiency is 60%.
   But circumstance temperature, temperature of cooling water (for water cooled water chiller), etc. may influence heat transfer efficiency.
    
5. Why Kenplas' KC series water chiller is better than others'?
   The difference is heat transfer efficiency;
   For water cooled water chiller, 75% (Kenplas') vs <=65% (others');
   For air cooled water chiller, 60% (Kenplas') vs <=50% (others').
    
6. How to choose water chiller for my machine?
    

   Material	Real chilling capacity (per Refrigerant Ton, i.e. 3000Kcal/h, or 12000BTU/h)
   	Injection Molding (kg)	Extrusion Molding (kg)	Blow Molding (kg)	Machine
   				Name	Power (kw)
   HDPE	13.6	22.7	-	Air Compressor (no after cooler)	4.7
   LDPE, PP	15.9	22.7	-	Air Compressor (with after cooler)	3.7
   Nylon	18.2	-	-	Vacuum Pump	7.5
   PS	22.7	34.1	-	Hydraulic Cooling	7.5
   ABS	22.7	-	-	Hot Runner Mold	10.5
   PVC	29.5	36.3	-	Water Pump in Circuit	3.7
   PC	29.5	-	-	Feed Throat - 400 Ton up machine	1 set
   PET	31.8	-	-	Feed Throat - 400 Ton below machine	2 sets
   Polyolefins	-	-	15.9	Extrusion -- Gear Box Cooling	74.6
   				Extrusion -- Feed Throat (screw<=3")	1 set
   				Extrusion -- Feed Throat (screw>3")	0.5 set
   				Extrusion -- Barrel or Screw Cooling	1 inch (screw dia)

   Remark: 1 Kw = 860 Kcal/h = 1.34 Hp.
   
   
7. What flow rate of chilled water is the best?
   Generally speaking, the temperature differential between chilled water and back water should be within 3~5⁰C (sometimes 1-2⁰C).
   Please note this equation: (Real chilling capacity in Kcal/h) = (temperature differential in ⁰C) * (flow rate of chilled water in L/min) * 60min/h.
    
8. Any requirement to water?
   For sure, the water should be clean. Moreover, be care for PH value of water. It is the best to have PH=7.
   If PH>7, terrible corrosion may happen, which leads to scale (dirt) gathers inside evaporator or mold, thus may reduce heat transfer efficiency by 30%. In such case, an water softening device (or discale additives) is needed in the water circulation to lower the PH of water.
    
9. What should be the diameter of pipeline?
    

   Dia.	3/8"	1/2"	3/4"	1"	1-1/4"	1-1/2"	2"	3"
   Flow (L/min.)	12	20	35	60	90	130	230	560

    

10. Cooling for hydraulic oil, inlet of barrel?
    Generally, just normal gap water is OK. Better not use water chiller unless especially low temperature is required.
     
11. Heat preservation for pipelines of chilled water?
    Action on heat preservation must be taken not only to prevent heat loss, but also to prevent dew on pipelines.
    e.g. using metal pipeline (length 25m, surface area 25m²), chilled water -- 10⁰C,  circumstance temperature 30⁰C, heat loss may goes up to 750Kcal/h, i.e. 10% of nominal chilling capacity of 3Hp water chiller.
    Another solution is to use enhanced rubber tube instead of metal pipelines.
     
12. Any special requirement on water cooling for PET preform Production?
    Details, go on >>.