Air-to-water Heat Exchangers for Large Hydro-generators

Air-to-water Heat Exchangers for Large Hydro-generators

During the operation of a large hydro generator, a large amount of heat is generated, which is mainly concentrated in the stator and rotor parts of the generator. Air - water heat exchanger through the forced air-cooled or natural air-cooled way, so that the cold air flow through the surface of the generator heat generating parts, heat absorption and temperature rise into hot air. The hot air is then introduced into the heat exchanger to exchange heat with the cooling water on the other side. As the specific heat capacity of water is large, it can absorb a large amount of heat and the temperature rise is relatively small, the heat of the hot air is transferred to the cooling water, the temperature decreases and becomes cold air, which is then sent back to the generator to continue the cycle of cooling, while the heated cooling water is dissipated or recycled through other parts of the cooling system.

Performance Advantages

High-efficiency cooling: it can quickly and effectively take away the heat generated by the generator, maintain the generator within the normal working temperature range, improve the efficiency and reliability of the generator, and extend its service life.

Energy saving and consumption reduction: compared with other cooling methods, the air - water heat exchanger utilises the natural properties of air and water for heat exchange, and does not need to consume a large amount of energy to drive the cooling equipment, thus reducing the operating costs of the hydro generator.

Environmentally friendly: Since it does not require the use of refrigerants and other potentially harmful substances to the environment, the air - water heat exchanger has good environmental performance, in line with the requirements of modern society on environmental protection.