Cooling Oil Cooler
I. Overview of Cold Oil Cooler
Cooling oil units are a commonly used oil cooling device in power systems. Our company's cooling oil units are also suitable for metallurgy, chemical industry, mining, light industry, and heavy industry sectors. They are mainly used for circulating cooling in oil systems for equipment lubricants, variable speed system oil transformers, and steam turbine turbines.
Currently, all the cool oilers produced follow a single model, which has many drawbacks after years of practice; they are large in size, have poor cooling efficiency, complex sealing, and are difficult to maintain. Our company's R&D team has developed a new type of cool oiler that features excellent cooling performance, with the outlet oil temperature nearly equal to water temperature, simple structure, easy operation, and compact size.
II. Main Technical Parameters of the Cold Oil Cooler
Basic Parameters (Table 1)

Vertical cold oil cooler structure and dimensions (see Figure and Table 2)

Section 3: Structural Features of the Cool Oil Cooler

The cooler is mainly composed of an inlet cover, housing, tube bundle, outlet cover, seals, and fasteners. The housing features four pipe connections for oil and water inlets and outlets, and is also equipped with an oil outlet, drain outlet, and exhaust outlet.
1. Utilizing copper tubes as heat exchange elements, offering high thermal conductivity, a large heat exchange area per unit length, and high heat transfer capacity.
2. Reasonably structured, capable of maintaining stable oil extraction temperature over a wide temperature range, and exhibits excellent resistance to sudden temperature changes and vibrations.
3. Durable structure to prevent cooling water from entering the turbine unit.
4. Finned tubes are smooth with no burrs or folds, making them resistant to dust and scale buildup, and offer low fluid resistance. Cool oilers are categorized into vertical and horizontal types based on installation methods. Vertical cool oilers feature a small installation area and ease of installation. Horizontal cool oilers have lower pressure drop and strong resistance to water hammer impacts. Therefore, selecting the appropriate vertical or horizontal cool oiler based on specific site conditions, space height, and performance requirements can better meet the needs of generators and other equipment.
5. Installation, Operation, and Maintenance
1. Properly position the cooler, ensuring accurate connection of the inlet and outlet oil pipes, generally install in the system's return oil path or in systems below the design pressure, with oil-side pressure higher than water-side pressure.
2. Flanges for in-and-out water pipes and installation foot bolts should be assembled on-site.
All pipeline flanges and valve seals are tightly sealed with no leaks.
4. Prior to starting the cold oil cooler, the pipeline should be cleaned to prevent debris from blocking the cooling tubes.
5. When starting the cooler, first gradually open the import oil gate and the air vent (direct gas angle) to exhaust the gas inside the shell. Close the air vent and then open the outlet oil gate. Next, fully open the cooler's outlet water gate, slightly open the top water-side air vent, and close it after all the air is released. Adjust the outlet water gate based on the cooler's outlet oil temperature (while opening the cooling water valve, gradually increase the flow rate), and regulate to maintain normal oil temperature.
6. Inadequate air expulsion from the heat exchanger tube will result in poor heat exchange performance.
7. When shutting down cold oil coolers during the severe winter season, it is essential to drain all the cooling water from the coolers to prevent equipment from cracking due to freezing.
8. When the cooler is shut down, close the oil and water inlet valves in sequence, followed by the oil and water outlet valves. Loosen the screw plugs on the drain and oil drain ports, and drain all the water and oil from the cooler.
9. The cooler typically requires cleaning the cooling tube bundles, end covers, and housing with gasoline every year or so. Upon reassembly, a pressure test with 1.25 times the normal pressure and no leaks should be conducted.
Section 4: Cold Oil Cooler Order
When selecting a cooler, please inform us of the cooling area.
2: Fuel and water temperatures, as well as intake pressure and resistance drop.
3: Heat exchanger cooling tubes are generally made of purple copper, but stainless steel tubes can also be chosen upon customer's request.