Dry Coolers for Use in Gas Turbines

Dry Coolers for Use in Gas Turbines

When used in gas turbines, dry coolers usually have a large V-shape structure.

The dry cooler contains Cooling Coils, which are usually made of highly efficient heat transfer materials such as copper or stainless steel tubes. The arrangement and spacing of the Cooling Coils are carefully designed to ensure that the airflow is in full contact with the surface of the tube bundle for good heat exchange.

The V-Dry Cooler is equipped with a fan system. The fan is installed on the top of the dry cooler and introduces outside air into the dry cooler through forced ventilation to exchange heat with the hot medium in the cooling coil.

The frame structure of the V-cooler is usually made of high-strength steel with good stability and load-bearing capacity. The frame structure not only supports the Cooling Coil and the fan system, but also ensures that the dry cooler is able to withstand various external forces during operation.

Working Principle

Heat exchange process: The high temperature exhaust gas produced by the gas turbine in operation enters the Cooling Coil of the V-shaped dry cooler and exchanges heat with the cold air flowing outside the tube. The heat is transferred to the cold air through the Coil, so that the temperature of the exhaust gas is lowered while the temperature of the cold air is increased.

Air flow path: the fan will suck the outside cold air into the bottom of the dry cooler, the cold air flows upward under the action of the fan, passes through the gap between the Cooling Coil, and carries on the full heat exchange with the high temperature exhaust gas inside the Cooling Coil. After heat exchange, the hot air is discharged from the top of the dry cooler, forming a continuous air flow cycle.

Temperature adjustment: By adjusting the fan speed or the number of openings, the air flow into the dry cooler can be controlled, thus realizing the adjustment of the cooling effect of the exhaust gas. According to the operating conditions of the gas turbine and changes in the exhaust gas temperature, the automatic control system can adjust the operating status of the fan in real time to ensure that the exhaust gas temperature is kept within a suitable range.