What type of chillers are there

The thermostatic expansion valve is a superheat control, and will not maintain a constant vapor pressure. It only provides the restriction necessary to reduce the pressure to some level, which will be determined by compressor size, thermostatic expansion valve, size load, load demand and system conditions.

If a constant evaporator temperature is required, it can be achieved very simply by maintaining the pressure corresponding to the saturation temperature required. This is accomplished by adding an evaporator pressure regulating valve to the system. Our ideal cycle has experienced a pressure drop in the thermostatic expansion valve.

Subcooling or superheat cannot exist where there is a mixture of liquid and vapor. Therefore any place in the system where the refrigerant exists in two states, it will be at the saturation temperature for its pressure. Some of the liquid refrigerant is required to boil as a means of removing the heat necessary to achieve this lower temperature. Yet another heat transfer process, which yields a lower liquid temperature. The liquid that is sacrificed in the boiling process explains the increase in refrigerant quality.

The greater the difference between the liquid temperature and evaporator temperature, the more liquid will have to be boiled in order to achieve the new saturation temperature. This results in an even higher refrigerant quality. Warm air is blown across the evaporator, where its heat content is transferred to the boiling refrigerant. This is a latent heat gain to the refrigerant, causing no temperature increase, while experiencing a change of state. In the ideal cycle, the last molecule of saturated liquid boils off at the evaporator outlet, which is connected to the compressor inlet.

Hence, the vapor at the inlet of the compressor is saturated. The cycle continues this way until the refrigerated space temperature is satisfied, and the equipment cycles off. Information from Sporlan, Inc. Compressors can be divided into rotary compressors, axial compressors, jet compressors and screw compressors and other types, of which the most widely used is reciprocating piston compressors according to the structure of multiple compressors.

What are Differences Between Chiller and Refrigerator? Your email address will not be published. Save my name, email, and website in this browser for the next time I comment.

Log in Remember me. Lost your password? Quick View. In an air-cooled chiller, hot refrigerant entering the condenser is exposed to atmospheric air which rejects the heat before it condenses back to its liquid state. On the other hand, in a water-cooled chiller, hot refrigerant gas is sent to a water-cooled heat exchanger or condenser, and the refrigerant is cooled using water from a cooling tower.

For a better understanding, learn how cooling towers and chillers work together. Take a closer look at how a chiller works in these different system types. Vapor compressor chillers use a compressor to pump refrigerant which extracts unwanted heat from a process.

The components of the system are the same as in the absorption type — we have an evaporator, a condenser, and an expansion unit. However, there is no absorbent medium in the unit. Unlike vapor compressor systems, vapor absorption chillers use a heat source to transport the refrigerant around the system for cooling. The components of the system are the same as in vapor compressor type chillers, but in place of the compressor, there is an absorber, a pump, and a generator.

The heat source can be heated by water or steam, the refrigerant can be a low Global Warming Potential GWP type like Ra or Rze and the absorption medium can be a solution of Lithium Bromide or ammonia. The heated water or steam helps regenerate the adsorption solution. Centrifugal chillers are very dependable vapor compression cycle chillers ideal for medium to large scale cooling operations from — tons of refrigeration.

They consist of the usual evaporator, compressor, condenser, and expansion device set-up but with additional rotating impellers, which compress the refrigerant and transport it around the system.

Screw Chillers are vapor compressor chillers that use a screw compressor to transport the coolant through the system. Some key benefits are their compact installation, quiet operation, lower maintenance costs, and high energy efficiency.

They are also ideal for high-rise buildings. Both chiller types offer efficient cooling for facilities. However, Cold Shot Chillers recommends using centrifugal chillers for high-volume cooling and screw chillers for dependable operation in facilities with space constraints. To better determine your needs, feel free to use our chiller sizing calculator.

For over 30 years, Cold Shot Chillers has manufactured the best industrial chiller systems to meet the process cooling needs in industrial and commercial applications all over the country. Cold Shot Chillers offers ruggedly dependable and efficient water-cooled and air-cooled industrial chillers with close tolerances for any application as well as parts and accessories.

For inquiries, please contact us online today or call us at 1. Stay tuned to our blog for the latest news, insights and advice related to air-cooled chillers, water-cooled chillers, custom chillers, chiller parts and industry resources. The store will not work correctly in the case when cookies are disabled. Toggle Nav. Using water evaporation to dissipate heat uses significantly less energy than blowing air across a hot surface.

Additionally, water chillers tend to last longer than air-cooled chillers. Air-Cooling and Water-cooling chillers are further categorized by the type of compressor technology used. Centrifugal chillers are often used for medium to large cooling loads typically available from up to 6, tons of refrigeration This system offers high cooling capacity in a compact design. Centrifugal chillers operate by using rotating impellers to compress the refrigerant and force it around the chiller.

These systems work by using a piston and chamber to compress the refrigerant. Scroll compressors are used in both air and water coolers. These chillers operate by using two spiral plates one stationary and one rotating to compress the refrigerant. Our chillers use scroll compressors for the 1 and 2-ton models.

Screw chillers are also used in both water and air chillers and are best for small to medium cooling loads.