Explosion-proof water chillers are designed for use in hazardous environments where the risk of explosions is present. These coolers are made with special materials and designs to prevent any sparks or heat from igniting flammable substances. They are ideal for use in industries such as oil and gas, chemical processing, and mining, among others. In addition to their explosion-proof features, these coolers are also highly efficient in cooling water, making them useful for a variety of applications. Their compact size and portability make them easy to use in different locations and settings. With their superior level of safety and performance, explosion-proof water coolers are a wise investment for any company operating in potentially hazardous environments.
Why Explosion-Proof Chillers Are So Important
To protect the safety of both employees and the facility, reducing the chances of an explosion becomes a prime objective for any business owner. Some worksites are more prone to danger than others. Reducing the risk that a spark from a chiller could ignite explosive or flammable materials is why explosion-proof chillers are a safety requirement for many industries. Though all explosion-proof equipment comes at a premium price, the cost is far below the cost of lost lives from an industrial accident caused by using the wrong machinery.
Aside from being a safety issue, explosion-proof chillers are required by law in many locations that have flammable material in the air. Failure to comply could result in hefty fines in addition to the danger of igniting flammable materials.
How Does an Explosion-Proof Chiller Work?
With multiple types of explosion-proof chillers available, how each one works depends on the components used. For instance, there are both screw and scroll compressors and air-cooled and water-cooled condensers. The parts of a chiller system don’t make it explosion-proof. The design of the overall system does. But the components determine the final efficiency of the chiller and the temperatures it can reach. Use this information when selecting a chiller for your worksites.
Most chillers operate in the same way, in a nutshell, chillers work by delivering a continuous flow of refrigerant to the cold side of the evaporator at the desired temperature. A chiller then pumps the cooled fluid through the process to remove heat from your equipment and funnel it back to the return side. Our selection of chillers has a range of -60 degrees Fahrenheit to 30 degrees Fahrenheit. Ask us if you have any specific requirements for the cooling from your chiller unit.
Refrigerant starts the process in a mixture of liquid and gas. The gas and liquid move into the evaporator, where heat transforms the refrigerant into a gas with low pressure. This gas moves into the compressor, which uses one of several methods to compress the gas into a high-pressure state. This gas moves to the condenser, which may use water or air to cool the refrigerant. In the condenser, the coolant gives off its heat and condenses back into a liquid. This liquid is at a high pressure when it passes through an expansion valve that controls how much of the cooled refrigerant passes into the evaporator to begin the cycle anew.
Types of Explosion-Proof Chillers
You can choose from many types of explosion-proof chillers, including:
Scroll Chillers: Chiller units with scroll compressors have interlocking spirals in the compressors. As the hot, low-pressure refrigerant passes through these, the scrolls raise the pressure of the refrigerant, until it exits in the required high-pressure, heated state.
Screw Chillers: The compressor in a screw chiller uses one or two screws to press the refrigerant down into a high-pressure state.
Air-Cooled Chillers: These Air-cooled chillers pass the high-pressure, hot refrigerant through a condenser that blows air over the tubes inside. This air-cooling process is like the way a car radiator removes heat from engine coolant. After the air removes heat from the refrigerant, it passes on to the evaporator.
Water-Cooled Chillers: Water removes heat from refrigerants in water-cooled condensers. Cold water passes into the condenser, where it absorbs heat from the refrigerant. After heating, it flows out of the condenser, and the cooled refrigerant moves on to the evaporator.
What sets explosion-proof cooling units apart from standard units is the protection of the components. Wires move through sealed conduits and motors have air-tight junction boxes. Seals further prevent flammable gas from entering the system. By completely sealing the electrical components, chiller manufacturers allow these units to be installed even in dangerous places.
Explosion-Proof Chiller Applications
Explosion-proof chillers are not just for use in factories. Cooling units designed for hazardous environments have several applications. Some of the companies that often need specially sealed chillers include:
Refineries: Petrochemical refinement requires extreme caution with all materials used. Refineries produce the flammable vapors that require Class 1 explosion-proof chillers.
Sample or Process Analyzers: With sample or process analyzers, workers identify the chemical makeup of various substances. Because the contents have unknown compositions and could include dangerous materials, explosion protection in the sample analyzing areas could save lives.
Granaries: Flour is extremely flammable. Ask anyone who has lived near a grain silo and heard stories about explosions. The fine dust in the air only needs a small spark to set it off. That’s why silos and granaries need explosion-proof equipment.
Laboratories: Ventilation in labs is critical to the safety and health of the workers. Fire safety and explosion-proofing where needed is also important. Anywhere volatile, flammable vapors or gases exist, you need particular electric parts to resist creating stray sparks that could ignite.
application s
Chemical Plants: Chemical plants may generate or store potentially flammable substances. Even in storage spaces, the facility will need explosion-proof equipment. Ask us about our chemical plant solutions or some of our previous chemical customers.
Petrochemical Plants: To distinguish a petrochemical plant from a refinery, the former creates substances from petroleum whereas the latter refines crude oil. Both handle hazardous materials. Part of what makes many petrochemicals, such as gasoline, desirable is their flammability. That same trait also puts petrochemical plants at risk of fire.
Cooling Flammable Liquids: Flammable liquids often give off hazardous vapors. These vapors make explosion-proof chillers and other equipment in the space required. If the fluids remain sealed, the area would only need Class I, Division 2-approved units.
Refrigerant circulating system
The liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate. Finally, a certain temperature difference is formed between the refrigerant and the water. The liquid refrigerant also completely evaporates and becomes gaseous, which is then sucked in and compressed by the compressor (pressure and temperature increase). The gaseous refrigerant absorbs the heat through the condenser and condenses into liquid. After throttling through the expansion valve (or capillary tube), it will become a low temperature and low pressure refrigerant and enter the evaporator to complete the refrigerant circulation process.
Water circulation system
The water pump is responsible for pumping water from the water tank to the user's equipment to be cooled. The temperature of the chilled water rises after the heat is taken away, and then it returns to the chilled water tank.
Electrical automatic control system
Including power supply part and automatic control part.
The power supply part supplies power to the compressor, fan, water pump, etc. through the contactor.
The automatic control part includes the combination of temperature controller, pressure protection, time delay device, relay, overload protection, etc. to achieve automatic start stop, protection and other functions based on water temperature.
Configuration and Characteristics
Compressor
We selected BITZER (Germany), HANBELL (Taiwan Hanzhong), Copeland (the United States) and other original imported new high-efficiency scroll compressors and screw rotary sub compressors (the most advanced 5:6 patent asymmetric rotor tooth shape), which are 20% - 30% more efficient than ordinary compressors. Finned coil air exchangers (no cooling water system required), condensers made of high-quality and high-efficient copper tubes and world-renowned brand components are used, The unit has the advantages of small size, low noise, large energy, long service life, simple operation, etc. Its beautiful and exquisite shape design and reliable and stable high-performance quality are outstanding among similar products!
Evaporator
The copper pipe of evaporator adopts internal and external thread reinforced pipe. The surface of the copper pipe is threaded. The external surface of the copper pipe is smooth and the cooling effect is good. The evaporator barrel is insulated with 25 mm thick PE insulation board, without condensation and less cooling loss. The air-cooled screw chiller uses a shell and tube evaporator, which is independently designed and produced by Shilin Refrigeration.
Condenser
The condenser is made of copper tubes imported from abroad, which are processed into trapezoidal low ribbed tubes to enhance the heat transfer capability. The copper tubes have smooth surfaces, reducing the water pressure and making them easy to clean and maintain. It is a fan for heat dissipation, so it uses a finned condenser, which is also independently designed and produced by Dongyue Refrigeration Co., Ltd.
Protector
The protection device is designed to ensure that the chiller can be started at the first time in case of failure and protect the chiller from secondary damage. Its protective devices mainly include: compressor delay start protector, overload protector, high and low voltage protector, temperature control switch, antifreeze switch, fuse plug, electronic time protection safety valve, compressor overheat protector, compressor frequent start protector and abnormal indicator to ensure the normal operation of the unit.
Refrigeration Accessories
Frozen parts are all selected from the world's top brands SPORLAN (Poland), ALCO (Aike), DANFOSS (Danmaidanfoss), etc., with excellent performance, safety and environmental protection.
Control System
AC contactors, electrical accessories, etc. are original and genuine products of Omron and Korean LG brands, while the control panel is selected from American Bangpu brand (microcomputer Chinese digital display), which can perform remote monitoring and control according to user needs, and has multiple functions such as automatic loading and unloading, timing switch, and recording fault causes; It is easy to operate, and the host is connected to the power supply. Low failure rate, high safety factor, simple installation, system control can be adjusted immediately, intuitive and reliable.
Parameters and Specifications of Some Standard Models
Anyda Can Fulfil Your Process Cooling Needs
Anyda Chillers is an industrial chiller manufacturer offering a full range of water chillers that can be custom-built to various industrial applications.
To learn more about how we can assist with your process cooling needs, please contact us today!
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