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Chillers are machines that remove heat from liquids and release it into the atmosphere by means of a refrigeration cycle. The chilled liquid, also known as a coolant, is then directed to a heat exchanger to cool process equipment, air or another liquid. Chiller systems range vastly in size and design and may be fabricated as small, localized or portable chiller units for small applications or as large temperature chambers or central chillers designed to provide cooling for entire facilities.

A chiller manufacturer will use either absorption or vapor-compression refrigeration cycles to produce their cooling effect. Both cycles use a refrigerant that strategically absorbs heat in one place as it evaporates and then releases heat in another place as it condenses. In most chillers this occurs in a four-stage cycle of pressurization, condensation, depressurization, and evaporation. First, the refrigerant vapor is pressurized, either by heating or by means of a compressor. Second, the refrigerant moves into a condenser comprised of a coil or set of tubes with either water or air circulating around it. Read More…

Chillers Chillers are machines that remove heat from liquids and release it into the atmosphere by means of a refrigeration cycle. The chilled liquid, also known as a coolant, is then directed to a heat exchanger to cool process equipment, air or another liquid.
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Leading Manufacturers

Holland, MI  |  616-392-3161

Russells Technical Products has been designing and manufacturing environmental test chambers since 1972. With over 150 years of combined management experience, our company provides its customers with quality environmental test systems and advanced manufacturing techniques. Russells offers a variety of standard and custom designed chambers to meet your exact specifications.

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Russells Technical Products $$$

Cincinnati, OH  |  877-233-9871

We are leading environmental test chamber brand with over 78 years of experience designing environmental testing solutions. Over the years we have developed products for ease-of-use, reliability and performance designed to meet our customer’s testing needs and improve the safety and reliability of their products.

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Cincinnati Sub-Zero (CSZ) $$$

Holland, MI  |  616-393-4580

A pioneer since 1962, Thermotron has been building the most recognizable environmental test equipment in the industry. Every chamber and shaker sold is handcrafted in West Michigan and comes with an intuitive controller. From automotive and defense, to electronics and medical industries, Thermotron has helped companies small and large create more reliable products. When you need to know whether your product(s) will stand the test of time, rely on proven test chamber from Thermotron.”

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Thermotron Industries $$$

Grand Rapids, MI  |  800-368-4768

As a leader in the test chamber industry we believe our systems are ideal for your company. We manufacture models that come standard with many useful features for testing applications. We believe that our advanced technologies are essential to the reliability of our products and our quality customer service is perfect for your needs. Feel free to visit our website or give us a call to learn more!

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Weiss Technik $$$

San Jose, CA  |  408-945-7861

Hastest Solutions designs, manufactures and provides solutions for all environmental testing needs. For the full range of environmental test chambers, including HAST, temp/humidity, salt fog, solar radiation, high temp ovens, autoclave, temperature cycling, sand and dust testing, rain, triple zone chambers, including custom sized chambers, please contact us.

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Hastest Solutions $$$

Waltham, MA  |  800-678-5599

Thermo Fisher Scientific is the world leader in serving science, generating $18 billion in annual revenue. Customers worldwide trust the products and solutions available through our premier brands to help them accelerate innovation and enhance productivity. Together, we are making a difference in the world.

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Thermo Fisher Scientific $$$
placeholder image Russells Technical Products Cincinnati Sub-Zero (CSZ) Thermotron Industries Weiss Technik Hastest Solutions Thermo Fisher Scientific

The refrigerant vapor cools inside the condenser and changes into a liquid, rejecting a large amount of heat in the process. This heat is absorbed and borne away by the water or air flowing around it. Thirdly, the refrigerant liquid proceeds through an expansion valve that decreases the pressure and allows for evaporation to take place. The flash evaporation that occurs at the expansion valve cools the liquid drastically. Lastly, the cold fluid moves into the heat exchanger or evaporator, where the remaining liquid refrigerant evaporates as it absorbs heat from the process (direct cooling) or process coolant (indirect cooling). In recirculating chillers, the refrigerant vapor is then drawn into the first compression stage to start the cycle over again.

Chillers come in a variety of types. Absorption chillers use a heat source to drive the refrigeration cycle, while vapor-compression chillers use a compressor to drive the cycle. The advantage of the absorption model is that it requires much less electricity, and can be powered by heat sources that might otherwise be wasted, such as heat-producing machinery or solar rays. On the other hand, vapor-compression is a readily-accessible and time-tested technology with more versatility and easier installation. There are a number of different types of vapor-compression chillers according to the type of gas compressor they use, the most common being centrifugal compressors, screw compressors and scroll compressors. Portable chillers usually use scroll compressors because they are the most compact and quiet. Another distinction between chillers has to do with the condenser. Condensers can be air cooled, water cooled or evaporation cooled. Air cooled chillers facilitate condensation of the refrigerant by blowing ambient air over the condenser coil or tubes and exhausting the hot air into the atmosphere, or in some cases using it to help heat the facility during the winter. Evaporation cooled chillers operate in the same way as air cooled chillers, except they introduce a mist of water in the air, the evaporation of which makes the heat transfer more efficient. Water cooled chillers employ a flow of water to take heat from the refrigerant in the condenser. This is the most effective condensing method, but also requires a constant source of cool water, and in most cases also necessitates an outdoor cooling tower and a pump to get the heated water there.

Chillers Chillers - Thermal Care, Inc.

When installing a chiller system, there are a number of important considerations. Foremost is cooling capacity. Industrial chillers are measured by their cooling capacity in terms of tons, each ton being roughly equivalent to the heat of fusion of one ton of ice, or 12,000 Btu/h. Capacities range from portable chillers with fractions of a ton to permanent multi-unit "plants" with cooling capacities of thousands of tons. Another significant decision is the sort of refrigerant; this will mostly depend on the range of temperatures the chiller will face. Common refrigerant choices include water, ammonia, carbon dioxide, sulfur dioxide, alcohol, brine and methane. Fluorocarbons, especially chlorofluorocarbons (CFCs) have also been used widely as refrigerants, but they are decreasingly common because of their ozone depletion effects. Other specifications to look at include condenser and evaporator flow rates, power source, cooling capacity, efficiency, location, compressor type and compressor horsepower. Most chillers also come with a local and/or remote control panel with temperature and pressure indicators and emergency alarms. When configured properly, chillers can provide simple and effective solutions for many process cooling and industrial air conditioning applications.

Chillers Informational Videos