Cold Water Recirculating System

Contact us today for the perfect temperature control solution

Overview of cold water recirculating system

The cold water recirculating system is configured for water cooling of production equipment. A cooling water system that uses water as the cooling medium and circulates it. After the cold water flows through the production equipment that needs to be cooled (often called heat exchange equipment, such as heat exchangers, condensers, and reactors), the temperature rises. If it is discharged immediately, the cold water is only used once (called a DC cooling water system). When the heated cold water flows through the cooling equipment, the water temperature will drop back, and the consumption of cold water will be greatly reduced, often saving more than 95%. Cooling water accounts for about 70% of industrial water consumption, so cold water recirculating system plays a role in saving a lot of industrial water.

Cold water recirculating system generally consists of the following parts:

1. Heat exchangers in the production process

2. Cooling the structure

3 circulating water pump and sump.

Cooling structures for cooling water cooling treatment generally use cooling pools or cooling towers. Its working process is as follows: the circulating water is transported by the water pump to the water supply main pipe, and then enters each production equipment that needs cooling treatment, flows through the parts that need to be cooled, and then collects into the return water main pipe, and sprays downwards through the water distribution pipe above the cooling water tower . When the fan on the top of the cooling water tower is running, the return water flows back into the water storage tank after sufficient heat exchange with the air flow in the packing layer.

Classification of cold water recirculating system

Cooling equipment can be divided into open type and closed type, so cold water recirculating system is also divided into open type and closed type. Open systems are more complex to design and operate.

Open type: There are two types of cooling equipment, cooling pools and cooling towers, both of which mainly rely on the evaporation of water to reduce the water temperature. Fans are often used in cooling towers to promote evaporation, and cooling water is often blown away. Therefore, the open cold water recirculating system must supply fresh water. Due to evaporation, the circulating water is concentrated, and the concentration process will promote salt scaling. Make-up water has a dilution effect, and its flow rate is often determined according to the concentration limit of circulating water. Usually the amount of added water exceeds the amount of water lost by evaporation and wind, so some circulating water (called sewage) must be discharged to maintain the balance of water.

In an open system, due to the contact between the water flow and the atmosphere, dust, microorganisms, etc. enter the circulating water; in addition, the escape of carbon dioxide and the leakage of materials in the heat exchange equipment also change the water quality of the circulating water. For this reason, circulating cooling water often requires treatment, including sediment control, corrosion control and microbial control. The determination of the treatment method is often related to the water quantity and quality of the make-up water, as well as the performance of the production equipment. When multiple agents are used, possible chemical reactions between agents should be avoided.

Closed The closed cold water recirculating system adopts closed cooling equipment, the circulating water flows in the tube, and the outside of the tube usually uses wind to dissipate heat. Except for the material leakage of the heat exchange equipment, there are no other factors that change the water quality of the circulating water. In order to prevent the formation of salt scale in the heat exchange equipment, sometimes the cooling water needs to be softened. In order to prevent heat exchange equipment from being corroded, corrosion inhibitors are often added; when using high-concentration and highly toxic corrosion inhibitors, pay attention to safety, and the cooling water discharged during maintenance should be properly disposed of.

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

Precision Chillers / Small Chillers (Custom Designs)

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

Recirculating Chillers (Custom Designs)

Our recirculating chiller adopts low-temperature refrigeration technology, the temperature is as low as -120℃, and various accessories are customizable.

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.

Chillers for Automotive Battery Test

(Custom Designs)

Temperature simulation for vehicle quality test: battery life test, fuel injector/motor test bench, airbag test, component test bench, etc.

Temperature / Pressure / Flow can be independently controlled.

1&2: one machine for two groups control.

Temperature remains constant, pressure / flow can be independently controlled.

1&3: one machine for three groups control.

1&6: one machine for six groups control.

Chillers for Semiconductor (TES series)

(Custom Designs)

Suitable for precise temperature control of electronic components. In the manufacture of semiconductor electronic components for harsh environments, the IC packaging assembly and engineering and production testing phases include electronic thermal testing and other environmental testing simulations.

Chillers for Semiconductor (LTS series)

(Custom Designs)

Suitable for precise temperature control of electronic components. In the manufacture of semiconductor electronic components for harsh environments, the IC packaging assembly and engineering and production testing phases include electronic thermal testing and other environmental testing simulations.

Chillers for Semiconductor (FLT series)

 (Custom Designs)

The semiconductor temperature control system chiller is mainly used for precise temperature control in the semiconductor production process and testing process. It is specially developed and designed for the semiconductor industry.

Chillers for Semiconductor (FLTZ Series Frequency Conversion)

(Custom Designs)

Double frequency conversion series temperature control system, circulation pump and compressor are all adjusted by frequency conversion.

Chillers for Semiconductor (ETCU series)

(Custom Designs)

Heat exchange type

System without compressor

Chillers for Semiconductor (ZLFQ series)

(Custom Designs)

Coolant Distribution Unit

Liquid cooling equipment is suitable for semiconductor testing, electronic equipment constant temperature testing, cooling server supporting infrastructure, and other fluid temperature control places.

Chillers for Energy Storage(Custom Designs)

Liquid Cooling Solutions For Battery Energy Storage Systems