A low-temperature chiller system is a type of refrigeration system designed to achieve and maintain lower temperatures than standard chillers. These chillers are used in various industrial and commercial applications that require cooling to very low temperatures, typically below freezing.
They utilize a refrigeration cycle similar to standard chillers but are equipped with components and refrigerants capable of handling much lower temperatures. Low-temperature chillers often employ different compressors, evaporators, and condensers that are specifically designed to work efficiently at these colder temperatures.
The structure of a low-temperature chiller system can vary based on its design and intended application. However, here are the key components typically found in a low-temperature chiller:
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Item |
Specification / Supplier |
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Model |
AYD-340A |
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Cooling capacity |
kw/h |
629.8 |
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Power input |
kw |
396.9 |
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Current |
A |
714.5 |
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Temp Outlet (℃) |
-10 |
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Power Supply |
380V-3N-50HZ |
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refrigerant control |
Expansion valve |
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Refrigeration circle |
two |
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refrigerant |
R404A |
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Dimension（mm）L×W×H |
11800*2000*2200 |
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Compressor |
Style |
Semi-hermetic screw type |
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Quantity（set） |
2 |
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Model |
RC2-580B |
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Compressor Power(kw) |
171.6*2 |
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Start Way |
100%-75%-50%-25% |
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Condenser
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Style |
Fin |
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Air Volume（m3/h） |
352000 |
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Fan Qty(pcs) |
16 |
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Fan Power(kw) |
35.2 |
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Evaporator |
Style |
Shell and Tube / 1set |
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Cold water flow（m3/h） |
110 |
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Pipe size（DN） |
125 |
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Water Pump(kw) |
18.5 |
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Protector Device |
1.Phase protector 2.Fan overload protector 3.High/low voltage protector 4.overheat protector 5.Anti-freeze protector |
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Unit Weight（kg） |
7960 |
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Main Parts |
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Compressor |
Hanbell |
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Condenser |
Anyda |
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Evaporator |
Jindian |
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Electronic |
LS / Carlo |
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Expansion Valve |
Sanhua |
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Electrical control |
Siemens |
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1. Compressor: Low-temperature chiller system use specialized compressors capable of handling very low temperatures. These compressors compress the refrigerant, raising its temperature and pressure before it enters the condenser.
2. Condenser: The high-pressure, high-temperature refrigerant gas from the compressor flows into the condenser. Here, the refrigerant releases heat and condenses into a liquid state due to cooling. This liquid refrigerant then moves to the expansion valve.
3. Expansion Valve: The expansion valve regulates the flow of the high-pressure liquid refrigerant from the condenser to the evaporator. It controls the pressure drop, allowing the refrigerant to expand rapidly, which causes a significant temperature drop.
4. Evaporator: In the evaporator, the low-pressure liquid refrigerant absorbs heat from the substance or environment being cooled. As it absorbs heat, it evaporates into a gas, returning to the compressor to start the cycle again.
5. Insulation: To maintain the low temperatures efficiently, low-temperature chillers often feature specialized insulation around components and pipes to minimize heat transfer between the chilled components and the surrounding environment.
6. Control System: These chillers incorporate sophisticated control systems to monitor and maintain precise temperature levels. These systems may include sensors, thermostats, and electronic controllers to regulate the chiller's operation and maintain the desired low temperatures consistently.
7. Cooling Medium: The cooling medium or fluid used in a low-temperature chiller can vary depending on the specific application and temperature requirements. Some common cooling mediums used in low-temperature chillers include:
a.Glycol/Water Mixture: Ethylene glycol or propylene glycol mixed with water is a commonly used cooling fluid in low-temperature chillers. This mixture allows the system to reach lower temperatures without freezing, as glycol has a lower freezing point compared to water alone.
b.Brine: A brine solution, typically a mixture of water and salts (like calcium chloride, sodium chloride, or potassium formate), is used as a cooling medium in some low-temperature chiller applications. Brine solutions can reach lower temperatures than water or glycol solutions, making them suitable for extremely low-temperature requirements.
c.Refrigerants: In some cases, especially in more specialized or industrial setups, refrigerants themselves can act as the cooling medium in low-temperature chillers. These refrigerants, chosen for their ability to maintain low temperatures, circulate through the system to absorb and release heat.
The choice of cooling medium depends on factors such as the desired temperature range, the specific application, environmental considerations, efficiency requirements, and safety concerns. For instance, glycol-water mixtures are common in HVAC and process cooling due to their freeze protection properties, while brine solutions might be preferred in industrial processes needing even lower temperatures.
Each cooling medium has its advantages and limitations, so the selection is based on the needs and constraints of the particular cooling system and its intended application.
Additionally, low-temperature chillers might have other features or components specific to their intended use, such as safety mechanisms, multiple stages of cooling, or additional filtration systems for specific applications like pharmaceutical or laboratory use.
The structure and components of a low-temperature chiller are engineered to handle the challenges of maintaining extremely low temperatures efficiently and reliably for various industrial, scientific, or commercial purposes.
Low-temperature chillers play a pivotal role across a broad spectrum of industries where maintaining precise and controlled cold temperatures is imperative for processes, preservation, and innovation. These systems are engineered to achieve and sustain temperatures significantly below standard chilling levels, typically reaching sub-zero temperatures (-40°C and lower), thereby enabling various critical applications.
Industrial Processes
Chemical Processing: In chemical industries, low-temperature chillers are instrumental in controlling reaction kinetics, crystallization processes, and enhancing product purity by facilitating precise temperature regulation.
Pharmaceuticals: Essential in pharmaceutical manufacturing, these chillers aid in preserving and storing sensitive drugs, vaccines, and biological materials requiring stringent temperature control for stability and efficacy.
Food and Beverage: From flash freezing to maintaining consistent temperatures during production and storage, low-temperature chillers ensure food safety, extend shelf life, and preserve product quality.
Scientific Research
Laboratory Settings: Laboratories rely on these chillers to create controlled environments for experiments, maintaining ultra-low temperatures for scientific studies, material testing, and specialized equipment cooling.
Cryogenics: Low-temperature chillers' system are integral in cryogenic research, allowing scientists to reach and sustain extremely low temperatures critical for studying materials' behavior at near absolute zero.
Medical Applications
MRI and Medical Imaging: These chillers are employed to maintain cool temperatures in MRI machines, ensuring the superconducting magnets operate efficiently, providing accurate imaging for medical diagnosis.
Biotechnology: From preserving biological samples to controlling fermentation processes in bioreactors, low-temperature chillers are pivotal in various biotechnological applications.
Aerospace and Automotive Industries
Testing and Development: Aerospace and automotive sectors utilize low-temperature chillers for testing materials and components under extreme cold conditions, simulating real-world scenarios to enhance product durability and performance.
Energy and Environmental Control
Environmental Chambers: Used to simulate harsh environmental conditions for testing equipment durability and performance, these chillers regulate temperature and humidity in environmental chambers.
Energy Efficiency: Some low-temperature chillers play a role in improving energy efficiency by utilizing waste heat recovery systems or leveraging advanced cooling technologies.
Conclusion
Low-temperature chiller system are indispensable across numerous industries, enabling precise temperature control for critical processes, research, and product preservation. Their versatility and ability to maintain ultra-low temperatures are crucial in driving innovation, ensuring product quality, and advancing various scientific and industrial pursuits.
From pharmaceuticals to aerospace, from scientific research to food production, the impact of low-temperature chillers spans far and wide, underscoring their indispensable role in today's technological landscape.
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