Company News-Jiangsu Yunuo Cooling Technology Co., Ltd.

2022.06.23

Yunuo Cooling Technology will introduce the working principle of closed cooling tower to you. The complete set of closed cooling tower equipment consists of main engine, water tank, circulating water pump and electric control cabinet. The main engine is composed of shell, heat exchanger, fan, spray pump, water collector, water tank and pipeline valve and other components. During the working process, the cooling medium (soft water, oil or other liquid) is driven by the main circulating pump to circulate between the heat exchanger and the equipment to be cooled, and the spray water is evenly sprayed on the heat exchanger, on the outer surface of the heat exchanger A uniform water film is formed, and the cold air enters the tower from the air inlet below the tower body, and flows through the surface of the heat exchanger countercurrently with the spray water. Heat conduction and heat exchange of spray water evaporation and heat absorption, the saturated hot and humid air after absorbing heat is discharged into the atmosphere by the fan, and the rest of the spray water flows into the water tank at the bottom of the tower body, and is transported to the spray system by the water pump. In this way, the cooling medium in the heat exchanger is cooled down and cooled. There are two modes of operation for closed cooling towers. Air cooling, air cooling + spray. The switching of the two modes is automatically carried out by the electronic control system according to the requirements of the working conditions to achieve energy saving and consumption reduction. The main principle of the closed cooling tower is that the spray water evaporates on the outer wall of the coil to cool the cooling water flowing in the tube, and at the same time, the generated water vapor is taken away in time by the fan. A small part of the spray water evaporates, and the rest is collected by the chassis and recirculated. The higher temperature cooling water from the condenser is pressurized by the cooling water pump and sent to the cooling coil of the closed cooling tower. On the other hand, the water in the cooling tower chassis is pumped into the spray coil by the pipeline pump, and sprayed on the outer surface of the cooling coil to vaporize and absorb the heat of the cooling water in the coil, so that the temperature of the cooling water can be reduced. At the same time, by the suction effect of the fan installed on the water baffle, the air flows through the cooling coil from bottom to top, and exchanges sensible heat and latent heat with the spray water, which not only strengthens the cooling coil The surface heat is released, and the water vapor formed by evaporation can also be taken away in time to accelerate the evaporation of water and improve the cooling effect. During the working process of the closed working tower, the cooling medium (soft water, oil or other liquid) is driven by the main circulating pump to circulate between the heat exchanger and the equipment to be cooled, and the spray water is evenly sprayed on the heat exchanger. A uniform water film is formed on the outer surface of the heater. The cold air enters the tower from the air inlet below the tower body, and flows countercurrently with the spray water through the surface of the heat exchanger. There are two heat exchange methods in this process, namely, cold air and cooling. The heat conduction between the media and the heat exchange of the evaporation and heat absorption of the spray water, the saturated hot and humid air after absorbing the heat is discharged into the atmosphere by the fan, and the rest of the spray water flows into the water tank at the bottom of the tower body, and is transported to the spray by the water pump. system. In this way, the cooling medium in the heat exchanger is cooled down and cooled. The above is the relevant content introduced by Uno Cooling Technology.

2022.06.23

Several assembly methods of closed cooling tower

Yunuo Cooling Technology will introduce several assembly methods of closed cooling towers to you. Closed cooling tower, referred to as closed cooling tower, (also called evaporative air cooler, closed cooling tower) places the tubular heat exchanger in the tower, through the heat exchange of circulating air, spray water and circulating water to ensure Cooling effect. Because it is a closed cycle, it can ensure that the water quality is not polluted, well protect the high standard operation of the main equipment, and improve the service life. When the outside temperature is low, the sprinkler system can be stopped to save water. Pushing the implementation of energy conservation and emission reduction policies and the increasing scarcity of water resources, closed cooling towers have been widely used in metallurgy, aviation, electric power, chemical industry, machinery, petroleum, food, plastic, rubber and other industries in recent years. The closed cooling tower originated from the evaporative cooler, which began in the middle of the last century, and gradually began to be used with the development of the chemical, metallurgical, and electronic industries. For evaporative cooling technology, as early as 250 BC, the ancient Egyptians already knew how to use water evaporation for cooling. In the last century, various countries have also carried out many aspects of research on evaporative cooling technology. In the 1970s, the emergence of the energy crisis made the application of evaporative cooling technology gradually paid attention. In the 1980s, when it was discovered that the catastrophic climate that posed a huge threat to human existence was related to the air-conditioning and refrigeration industry, passive cooling technologies such as evaporative cooling technology, which used natural conditions to obtain cooling capacity, developed rapidly. The American ASHRAE has established a technical committee called "evaporative cooling", which aims to promote the application of evaporative cooling technology, collect and publish data on the application, installation, operation and maintenance of evaporative cooling systems, publish specifications and standards, and affirm and reward Research on evaporative cooling, in order to promote the application of evaporative cooling equipment in the whole country. The closed cooling tower is then sent to the air through forced convection between the spray water and the air, and the heat transfer of the spray water to the air reduces energy consumption; the two-layer cooling method uses air-cooled evaporation to absorb heat, and the cooling efficiency is high; it can be directly cooled Water, oil, alcohol, quenching liquid, salt water and chemical liquid and other media, no medium loss, stable composition due to the use of closed cycle. The medium is not affected by the environment and will not pollute the environment. It is mainly composed of the latent heat of the spray water evaporation and the sensible heat exchange between the spray water and the air. Because the cooled fluid is a completely closed circulation activity between the cooling tower and the process equipment Therefore, there is no phenomenon that debris enters the cooling pipeline system, and then the pipeline is blocked; the soft water is circulated for cooling. At high temperature, there is never scale formation, which causes scaling in the cooling pipeline system. It is different from the general cooling tower in which the cooling fluid directly touches the air, so it is called a closed-circuit tower. Because the closed cooling tower is a fully enclosed circulating cooling, it occupies a small area, does not need to excavate a pool, is easy to locate, and saves water. The above is the relevant content introduced by Uno Cooling Technology.

2022.06.23

Control Analysis of Cooling Tower

Uno Cooling Technology will introduce the control analysis of cooling towers to you. The cooling tower is a comprehensive product integrating a variety of disciplines such as aerodynamics, thermodynamics, fluids, chemistry, biochemistry, materials science, static and dynamic structural mechanics, and processing technology. Water quality is a multi-variable function, and cooling is a multi-factor, multi-variable and multi-effect synthesis process The analysis of the fan energy-saving controller puts forward that the purpose of the fan energy-saving control management is to realize the closed-loop automatic control of the fan operation. The temperature of the water supply is preset according to the needs of production. The influence of the climate and meteorological environment on the water temperature and the influence of the change of the system heat exchange conditions on the water temperature are reflected in time by the measured value of the temperature sensor, and the energy consumption of the cooling equipment can be adjusted to stabilize. Water temperature, realize self-control energy saving. The purpose of the fan safety monitoring and management is to automatically detect the vibration, oil temperature, and oil level changes, display and record them, and at the same time, alarm and stop the fans whose detection value exceeds the limit, so as to In order to achieve the purpose of safe and stable operation of the fan, reduce or even eliminate the occurrence of damage to the fan. According to the actual situation of on-site management, it is determined that the three parameters of "fan vibration", "lubricating oil temperature" and "gearbox oil level" are important operating parameters to ensure the safety of the fan [3]. A total of 15 design parameters such as "measurement range", "measurement accuracy" and "inspection time" have been determined for R&D and production. The system was tested in the circulating water field once in September 1993, and was named "KR-939 Fan Safety Monitor". The cooling tower system uses multi-parameter combination probe technology, digital command coding technology and computer network management technology. The three-parameter combination probe is installed on the fixed seat of the berth ruler of the fan gear box, and its probe rod is directly inserted into the lubricating oil, which directly converts the oil temperature, berth and equipment vibration values in the gear box into electrical signals, and transmits them to the remote control room. Fan safety monitor. Each safety monitor can be connected with 8 combined probes with a four-core cable to monitor the operating parameters of 8 fans in real time, and complete digital display at the same time. Over-limit alarm, over-limit shutdown and other multi-phase functions. After many tests and modification designs, it has been successfully applied to the equipment production site, and various parameters have reached the predetermined design requirements. To realize computer network control analysis, it can be connected with a management computer through a four-core communication cable (RS-422 standard serial interface), and the computer can be a general-purpose PC or an industrial computer. When equipped with the corresponding configuration monitoring and management software (DCS-900 software), it can realize network control with multiple KR-933 and KR-939 monitors. Ensure the safe operation of the fan According to field experience, the characteristics of the oil temperature, oil level and vibration curve of the fan in good condition are as follows: ①Oil temperature curve: It gradually rises and falls from the time of starting and stopping, and it becomes a smooth curve that approximates a straight line in about 1 hour. ② Berth curve: whether the machine is turned on or not, it should be approximately a horizontal straight line. ③ Vibration curve: In the power-on state, around a virtual straight line, make an irregular curve of up and down narrow oscillation. The above is the relevant content introduced by Uno Cooling Technology.

2022.06.23

The closed cooling tower manufacturer tells you what maintenance the closed cooling tower needs to do in winter?

2022.06.23

Overview of Closed Cooling Towers

2022.06.23

Freeze Protection of Closed Cooling Towers

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The Company is specialized in R&D, production and sales of a variety of water cooling products, such as closed cooling tower, crossflow tower, countercurrent tower, refrigerator, evaporative condenser, etc. In addition, the Company provides consulting of other relevant spare and accessory parts as well as technologies.

CONTACT：Manager Yang

TEL：+86-0510-83399019

TEL：+86-18861546799

ADD： No. 69-2, Beihui Road, Huishan District, Wuxi City

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