Pumped storage power station thrust external loop tubular cooler compared with plate heat exchanger

Pumped storage power station thrust external loop tube cooler shell and plate heat exchanger is 2019 - 09 - 18 thrust bearing is an important part of a vertical hydro-generator units, the weight of the rotor bearing the vertical unit and other parts of axial force, known as the heart of hydro-generator. Pumped storage power station is generally adopts thrust outer circulating cooling method, the cooling system is located in the external of bearing oil groove. Different power plant according to the using conditions and requirements, commonly used in the selection of the oil cooler tube shell type or plate type structure. Plate heat exchanger tube shell type oil cooler works: how it works: compared with the tube shell type oil cooler, heat exchanger structure is compact, in the small space can accommodate larger heat transfer area. Because of cold and hot medium in the gap between the two pieces of stainless steel sheet, board with board between gap is very small, and has certain shape of convex concave corrugated heat transfer plate stamping, forcing the direction of the change of fluid flow, can make the fluid is uniformly distributed between the board, high coefficient of heat transfer, so in the thermal efficiency is higher. Plate heat exchanger of the cross section of flow is small, easy to jam, sensitive to scale. Board after scaling cause the loss of heat transfer effect; Therefore, the plate heat exchanger for cooling water quality requirement is high. Plate heat exchanger cleaning maintenance is relatively difficult, the use of maintenance cost is high, the late change of sealing gasket is very expensive. Its collapse, cleaning, back to the high professional skills requirements to operators, prone to leakage. Now clear storage, storage, sea power applications such as storage, there is a better evaluation. Compared with plate heat exchanger, shell type oil cooler and simple structure, can withstand higher working pressure and oil water side side of the high pressure difference, cleaning maintenance is convenient, not easy jam, low to water quality requirement, generally the water can be directly used as cooling water, need not fine filter. In thermal efficiency is relatively low, also in heat capacity, the volume is relatively large. Xianyou, xianju, jixi power plant adopts tube type heat exchanger. Above all, thrust external loop tube cooler shell and plate heat exchanger has successful application running performance. As to choose what kind of type, principal need to consider the circulation line layout space, water quality conditions and maintenance operation maintenance and so on comprehensive consideration. （ Source: pumping storage technology exchange)