LT-HT dry cooler Compatible With Baubouin 20M33G2750 Diesel Engine
The cooling system of the BoDu An 20M33G2750 diesel engine adopts a closed dual circuit design, which determines that LT-HT dry cooler need to have independent heat exchange capabilities in both circuits, respectively responsible for the cooling tasks of high temperature fresh water and low temperature fresh water. The two have clear division of labor and work together to form a complete system for heat dissipation of the unit. Unlike traditional water-cooled equipment that relies heavily on seawater and freshwater sources, the dry cooler adopts an "air-water" heat exchange mode, which dissipates the heat from the circulating water to the air through forced air cooling without the need for additional cooling water pipelines. This not only avoids problems such as water shortage, poor water quality, reduced heat exchange efficiency, equipment corrosion, but also significantly reduces system installation and maintenance costs, making it particularly suitable for complex installation scenarios such as outdoor, containerized, and remote areas without water sources.
The core adaptability of LT-HT dry cooler is reflected in their precise matching with the working conditions of the BoDu An 20M33G2750 engine. The high-temperature circuit of this model is mainly responsible for cooling the core heated components such as engine cylinder liners and cylinder heads. The circulating water outlet temperature is usually maintained at 85-90 ° C. After heat exchange in the dry cooler, the return water temperature needs to be stabilized to 70-75 ° C to ensure that the engine cylinder body temperature is within a reasonable range and avoid cylinder body deformation, seal aging and other faults caused by overheating; The low-temperature circuit focuses on the cooling of the boost air (intercooler) and engine oil, with a circulating water outlet temperature of about 38-42 ° C. After being cooled by a dry cooler, it drops back to 30-32 ° C, which can improve the density of boost air, optimize fuel combustion efficiency, and prevent engine oil from deteriorating due to high temperature, thus extending the service life of the engine lubrication system. This dual loop independent control design allows the cooling system to flexibly adjust the heat exchange efficiency according to the heat demand of the engine under different operating conditions, achieving "on-demand cooling" while balancing cooling effectiveness and energy efficiency.
In order to adapt to the high-power characteristics of the BoDu An 20M33G2750, the LT-HT dry cooler follow the principles of "high strength, high efficiency, and corrosion resistance" in structural design and material selection. The equipment adopts a dual tube bundle independent cavity structure, with two sets of heat exchange tube bundles corresponding to high and low temperature circuits respectively, without interfering with each other, effectively avoiding heat crosstalk between circuits and improving heat exchange accuracy; The heat exchange tube bundle adopts a finned tube design, which greatly improves the heat exchange efficiency by increasing the heat exchange area and optimizing the airflow channel, ensuring that a large amount of heat can be quickly removed during high load operation of the engine and maintaining stable circulating water temperature. In terms of material, depending on the application scenarios of the unit, copper fins/stainless steel tubes or all aluminum high-efficiency fins can be selected. The stainless steel tube material has excellent corrosion resistance and wear resistance, making it suitable for humid and high salt spray environments such as ships; The all aluminum material, with its advantages of lightweight and high heat transfer efficiency, is suitable for scenarios such as land power stations and industrial backup power sources. It can not only meet the long-term stable operation needs, but also reduce the overall weight of the equipment, making it easy to install and transport.
In terms of control logic and operational reliability, the LT-HT dry cooler compatible with Baudouan 20M33G2750 is equipped with an intelligent control system, which is linked with the engine control system to achieve automatic adjustment. The equipment is equipped with a high-capacity axial flow fan, which can automatically switch between variable frequency or dual speed operation modes according to changes in circulating water temperature. When the water temperature exceeds the set threshold, the fan runs at high speed to improve heat transfer efficiency; When the water temperature drops to a reasonable range, the fan runs at low speed to reduce energy consumption and achieve a balance between energy conservation and cooling effect. At the same time, the dry cooler is also equipped with monitoring components such as temperature sensors and pressure sensors to collect key data during the heat exchange process in real time. If there are problems such as abnormal water temperature or fan failure, an alarm signal can be issued in a timely manner, and the engine control system can be linked to adjust the working conditions to avoid engine shutdown due to cooling system failure and maximize the continuous and stable operation of the unit.
