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Improve the Accuracy and Stability of Refrigeration and Heating Systems

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Improve the Accuracy and Stability of Refrigeration and Heating Systems

 

To improve the temperature control accuracy and stability of the refrigeration and heating system, TEC thermoelectric technology, high-precision sensors, PID control algorithms can be used, and a symmetrical structure can be designed to achieve uniform temperature distribution and long-term stability.

Methods to improve temperature control accuracy

1. Using TEC thermoelectric technology: Utilizing the Peltier effect of the semiconductor refrigeration chip (TEC Peltier chip), precise heating and cooling can be achieved, thereby controlling the temperature within the set range, and the fluctuation is better than ±0.01°C.

2. High-precision sensor: Using high-precision temperature sensors such as platinum resistors and thermistors, the measurement accuracy is higher than ±0.01°C, which can accurately monitor temperature changes.

3. PID control algorithm: Using a high-precision industrial PID regulator with 24-bit AD, 16-bit DA and 0.01% output percentage, it calculates and outputs control signals by comparing with the set temperature value to achieve high-precision constant control.

Ways to Improve Temperature Uniformity

1. Symmetrical structure design: For example, using a cylindrical etalon base and a heat spreader can form a uniform temperature distribution.

2. Multiple TEC slices in parallel structure: increase heating and cooling power and achieve uniformity of etalon temperature.

3. Temperature sensor distribution: Arrange temperature sensors evenly on the heat spreader, one is used as a control sensor, and the rest are used as temperature measurement sensors to monitor temperature uniformity.

 

Refrigeration and Heating Systems

 

Long-term stability considerations

1. High thermal conductivity materials: Use high thermal conductivity pure copper heat spreaders and high thermal conductivity aluminum block radiators to provide stable cooling power for TEC thermoelectric sheets.

2. External water cooler: It forms a thermal connection with the TEC radiator to provide stable cooling power for the TEC thermoelectric sheet, which is the key to achieving high-precision temperature control.

3. Thermal insulation and thermal expansion matching: Consider thermal expansion matching and thermal insulation devices to reduce the impact of the external environment on temperature control.

System assessment and maintenance

1. Stability assessment: Establish a scoring system to consider operator safety, investment protection and safe system operation.

2. Power calculation: Calculate the required heating/cooling power based on material quality, temperature difference, expected heating/cooling time and bath liquid specific heat capacity.

3. Sensor calibration and maintenance: Calibrate and maintain the temperature sensor regularly to ensure its accuracy and working stability.

By using TEC thermoelectric technology, high-precision sensors, PID control algorithms and symmetrical structural design, the temperature control accuracy and stability of the refrigeration and heating temperature control system can be effectively improved. In addition, considering the long-term stability, security and maintenance convenience of the system, the system performance can be further optimized to meet the needs of different application scenarios.

 


 

We provide complete temperature control systems design and manufacturing. From standard models to complete customized products. We specialize in customer service and are dedicated to helping each customer have the optimal temperature control system for their specific need.

We provide non-standard customized solutions. Both single cooling chillers and cooling & heating combo units are available.

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Email: lilia@lneya.com    WeChat ID: +8615251628237    WhatsApp: +86 17851209193

 

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Cooling and Heating Systems (SUNDI series)

(Custom Designs)

  • Temperature range: -120℃ ~ +350℃
  • High-precision, intelligent temperature control
  • Cooling capacity: 0.5kW ~ 1200kW
  • Fully closed system to extend the service life of thermal fluid
  • Each device is load tested for more than 12 hours

 

Temperature range -10 ~ +150°C series -25 ~ +200°C series -25 ~ +300°C series -45 ~ +250°C series -45 ~ +300°C series -60 ~ +250°C series -60 ~ +300°C series -70 ~ +250°C series -80 ~ +250°C series-90 ~ +250°C series -100 ~ +100°C series
Cooling Capacity1.5 ~ 15kW1 ~ 200kW1 ~ 200kW0.45 ~ 200kW0.9 ~ 25kW0.25 ~ 60kW0.75 ~ 25kW0.4 ~ 15kW0.3 ~ 80kW0.2 ~ 80kW0.45 ~ 80kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


 

Cooling and Heating Systems (WTD series)

(Custom Designs)

  • (Micro channel / tube reactors specialized)
  • Temperature range: -70℃ ~ +300℃
  • High-performance circulation pump, more stable temperature control effect
  • Wide temperature range to meet the needs of more industries
  • Each device is load tested for more than 12 hours

 

Temperature range -70°C ~ +300°C -45°C ~ +250°C -70°C ~ +200°C
Cooling Capacity1.1 ~ 7.5kW1.5 ~ 5.5kW11 ~ 50kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


 

Cooling and Heating Circulators

(Custom Designs)

  • Temperature range: -45℃ ~ +250℃
  • Emerson Copeland compressor, reliable quality
  • Self-diagnosis function, multiple safety protection devices
  • Fully closed system to extend the service life of thermal fluid
  • Each device is load tested for more than 12 hours

 

Temperature range -25°C ~ +200°C series -45°C ~ +250°C series
Cooling Capacity1 ~ 15kW0.25 ~ 15kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


 

Heating Circulators

(Custom Designs)

  • Temperature range: +50℃ ~ +300℃
  • Large heat exchange area and fast heating speed
  • Self-diagnosis function, multiple safety protection devices
  • Closed circulation system, no oil mist at high temperatures
  • Each device is load tested for more than 12 hours
Temperature range +50°C ~ +170°C  (UC series) +50°C ~ +300°C  (UC series) +50°C ~ +300°C  (UST series)
Heating Capacity5.5 ~ 15kW3.5 ~ 130kW3.5 ~ 95kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


 

semiconductor chiller

TES Series (Temperature control for fuel and oil testing)

(Custom Designs)

  • Temperature range: -85℃ ~ +250℃
  • Siemens PLC controller and other brand accessories
  • Self-diagnosis function, multiple safety protection devices
  • Fully closed circulation system, no oil mist at high temperatures
  • Each device is load tested for more than 12 hours

 

Temperature range -45°C ~ +250°C series -85°C ~ +200°C series -60°C ~ +200°C series
Cooling Capacity0.3 ~ 25kW0.25 ~ 25kW3 ~ 60kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


 

TCU Multi-reactors Temperature Control System

(Custom Designs)

  • Temperature range: -120℃ ~ +250℃
  • Sealed, repeatable temperature control
  • Built-in electric heating thermal oil auxiliary system
  • Add cold and heat source heat exchange modules according to needs
  • Each device is load tested for more than 12 hours

 

Temperature range -45°C ~ +250°C series -120°C ~ +250°C seriesCustomized Temperature Control SystemRT+10°C ~ +135°C
Heating Capacity25 ~ 80kW25 ~ 80kWCustom25 ~ 300kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 

 

Cooling Chillers                                                                                                     

 

recirculating chiller

Recirculating Chillers / Refrigerated Circulator

(Custom Designs)

The chiller can be widely used in various industries and laboratories, and supports customized design.

 

 

Temperature range -25°C ~ +30°C series -45°C ~ +30°C series -60°C ~ -20°C series -80°C ~ -20°C series -120°C ~ -70°C series
Cooling Capacity0.8 ~ 30kW0.75 ~ 12kW0.4 ~ 6kW0.2 ~ 6kW0.3 ~ 5kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


 

Precision Chillers / Small ChillersMini Chillers / Small Chillers

(Custom Designs)

The chiller can be widely used in various industries and laboratories, and supports customized design.

 

 

Temperature range -18°C ~ +30°C +5°C ~ +35°C series
Cooling Capacity0.35 ~ 0.9kW1.8 ~ 50kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


 

low temperature chiller

Low Temperature Chillers

(Custom Designs)

We specialize in the production of low-temperature chillers with a temperature control range as low as -150°C, which can meet the refrigeration needs of different industries.

 

 

Temperature range -25°C ~ -5°C series -45°C ~ -10°C series -60°C ~ -10°C series -80°C ~ -30°C series-110°C ~ -50°C series -150°C ~ -110°C series
Cooling Capacity12 ~ 360kW6 ~ 180kW6 ~ 180kW4 ~ 180kW2 ~ 120kW2.5 ~ 11kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

 


SEMICONDUCTOR CHILLER

 

High Temperature Chillers

(Custom Designs)

The chiller can be widely used in various industries and laboratories, and supports customized design.

 

 

Temperature range +5°C ~ +40°C -25°C ~ +40°C -45°C ~ +40°C -80°C ~ +80°C -100°C ~ +80°C
Cooling Capacity6 ~ 40kW2 ~ 15kW1 ~ 8kW0.6 ~ 3kW1.5 ~ 3kW
Note: Any temperature range from -150℃ ~ +350℃ and any cooling capacity can be customized

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