A liquid chillers manufacturers directory featuring water chillers, air cooled chillers, industrial chillers, recirculating chillers, used chillers, chiller rental, chiller manufacturer, portable chillers, central chillers, air cooled water chiller, laser cooling systems, and coolant coolers.  

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About Liquid Chillers

Liquid chillers are refrigeration systems that chill liquids such as water, oil, brine, alcohol, chemicals and acids for industrial applications. Refrigerant gas passes through a heat exchanger, while a liquid flows in the other direction on the opposite side of the heat exchanger. The refrigerant absorbs the heat lost by the liquid. A compressor compresses the refrigerant into a high pressure, high temperature gas. The gas then moves into the condenser coil over which ambient air blows. The air, moved by one or more fans, removes heat from the gas, which causes it to condense into a high pressure, warm temperature liquid. The liquid passes through the expansion valve where a large pressure drop occurs, turning the liquid into a very cold mist. The mist returns to the heat exchanger, and the whole process begins again.

Liquid chiller manufacturers produce their products to be run with two categories of refrigerants, primary and secondary. Primary refrigerants are substances, such as CFCs, HCFCs and HFCs, which change their physical state from liquid to vapor or vice versa, based on the absorption or release of heat, respectively. Secondary refrigerants include water, brine and air and supplement primary refrigerants. There are also two types of compressors. A scroll style compressor rotates about a shaft to create a pump. A piston style compressor rotates a shaft that is curved like a crankshaft. The shaft, connected to one or more of the piston rods, moves the pistons up and down, creating pressure in the piston cylinder. Scroll compressors are usually more efficient than piston compressors, but both are very reliable and widely used in the refrigeration industry.

Condensers come in three types. In air cooled condensers, air circulates around tubes containing the refrigerant, contributing to the condensation of the refrigerant. These condensers are used in instances where water is unavailable. Water cooled condensers, also called “shell” or “tube” condensers, utilize water to condense the refrigerant. Water circulates through the tubes around which the refrigerant is introduced, causing condensation of the refrigerant on the outside of the tubes. In evaporative cooled condensers, water is sprayed onto tubes containing the refrigerant. The evaporation of the water causes the condensation of the refrigerant within the tube.

Liquid chiller manufacturers need to know quite a bit of information before building a specific chiller to meet the requirements of the application. The necessary data includes a brief explanation of the process, heat load, liquid to be chilled, temperature required in the process, temperature returning from the process, flow rate of the process liquid, flow rate constancy, type of chiller circuit (open- or closed-loop), pressure required during the process, type of condenser cooling required, temperature of the condenser cooling medium, installation location, electrical service available, type of package (including tank, pump or pumps and controls), physical restrictions, type of compressor and any other special details. Liquid chiller manufacturers will also need to know about the environment, as in the general layout of the facility, the conditions and existing equipment. They must also consider what kind of material will be used to build the liquid chiller. Are components available from a source other than the manufacturer? What will be the chiller’s energy efficiency? Is it “user friendly”? What about the warranty? Buyers should beware of compact liquid chillers, because, though they are initially cheaper, they cost more in maintenance/labor hours in the long-run. Also, avoid purchasing a liquid chiller with a “cooling coil” inside the tank, as it is impossible to access the cooling coil in a sealed tank.

Image Provided by Zarsky Water Chillers	Image Provided by Cooling Technology

Featured Articles

“CSZ Refrigeration Retrofit Guidelines”
http://www.cszindustrial.com/documents/articles/retrofitguidelines.htm

"Refrigeration And Energy Savings"
http://www.coolingtechnology.com/About_Process_Cooling/refrigeration_and_energy_savings/default.html

"Industrial Chillers"
http://www.coolingtechnology.com/About_Process_Cooling/industrial-chillers/default.html

Image Provided by Tempest Inc.	Image Provided by Tempest, Inc.

Types of Liquid Chillers

• Air cooled chillers, the most common chiller type, require little maintenance. However, because of the need for high condensing temperatures ranging from 120° F to 140° F, air cooled chillers require more power to operate.
  
• Central chilled water units consist of air handling units fitted with chilled water coils and are utilized in air condition systems.
  
• Cooling systems are used to remove heat from an area.
  
• Dedicated-process chillers operate year-round and are designed to provide specific, capacity-matched cooling protection and proper temperature/water flow. Dedicated-process chillers are the best choice for medical applications.
  
• Evaporative cooled chillers are uncommon but highly efficient liquid chillers. Evaporative chillers maintain the lowest condensing temperatures, which range from 85° F to 105° F.
  
• Fluid chillers provide process cooling using a secondary fluid.
  
• HVAC chillers are often installed outside and are available in centralized and modular designs. HVAC chillers are used in industrial and commercial environments.
  
• Industrial chillers are refrigeration systems that are used to chill various liquids in industrial settings.
  
• Liquid chillers are refrigeration systems that remove heat from various liquids.
  
• Machine tool chillers lower the temperature of coolant that is used in the cutting zone and recirculate it back to the machine tool in a closed-loop system.
  
• Medical chillers are self-contained chillers with higher pressure pumping, temperature stability and microprocessor controls.
  
• Portable chillers are self-contained units and are useful in small and/or dedicated applications.
  
• Recirculating chillers constantly circulate coolant in a closed loop, retaining high efficiency without wasting water.
  
• Water chillers consist of a compressor, condenser and chiller with internal piping and controls all contained within a single unit. The term “water chillers” refers also to an overall package that includes a refrigeration plant, water chiller and air or water cooled condenser.