Numerical Simulation On Pumping Well Water To Melt Ice For Diversion Channel At High Altitude And Cold Regions

In alpine regions like Northwest China, deicing and frost damage prevention in winter is a keyproblem that diversion power station has to take into account. It generates enormous economic loss andpotential safety hazard resulted from ice trouble every year. In existing measures for preventing ice damage,pumping well water to melt ice (PWWMI) is an ideal measure to solve ice damage in winter for diversionpower station. By taking advantage of groundwater with higher water temperature and infusing intodiversion channel, it improves water temperature of channel and prevents from water ice crystal. In themeantime, it increases channel flow used for generating electricity. Method of PWWMI in preventing fromchannel ice damage has already obtained good effect in actual application in many hydropower stations inNorthwest China, but there are few foreign and domestic researches on PWWMI, and most of which areintroductions of prototype tests and theories, few introductions of relevant simulation researches are made.The paper takes Xinjiang Hongshanzui Hydropower Plant that obtained good effect in application ofPWWMI as prototype experiment object, By zhe method prototype observation and numerical simulation,Research key factors and operation mechanism of PWWMI, Provide a theoretical basis and technicalsupport for PWWMI. Protection of the alpine zone diversion power plant capable of generating full winter,Aspects of the ecological environment of the local population, live production are of great significance.The paper takes Xinjiang Hongshanzui Hydropower Plant that obtained good effect in applicationof PWWMI as prototype experiment object, The results show that the effect of PWWMI. Gives thetemperature change process and temperature variation along the canal water mixed according to theprototype observation: After mixing the water temperature is lower channels (0.1~0.2℃) and hightemperature wells (9.6~10.6℃),Canal water temperature maintained at0.5~2.8℃,Ensure that channelswater will not form ice.The use of computational fluid dynamics software FLUENT, Under the boundary conditions tosimulate the actual pumping melting ice water after mixing channel, Simulated the visual image of thewhole process of melting ice pumping, And the simulation results were compared with observationsprototype, The results showed that simulation results are basically consistent with the measured data,Verify the correctness of the model; Secondly, Traffic flow channels and wells for each change anddiversion channels were changing temperature and water temperature to simulate the case, Analysis of thevarious factors affecting the warming effect on the channel, Mix well water flow and water temperature isproportional to the temperature change channels, The higher the temperature the greater the well waterflows, Channels warming effect is more obvious; Inversely proportional to the mixing channel and channelthe water flow, Warming effect of well water diluted under the larger channel flow situation, Little effectbecause warming effect of well water diluted, Proportional to channel water and mixed water temperature,The lower the temperature after mixing channel water temperature is lower; Final, Simulate the water temperature drops and well water channel flow increases both conditions while changing the temperaturechanges of mixed, The results show that well water flow increases when water temperature increases inwater temperature can be effectively reduced. In this paper, the resulting melting ice pumping numericalresults, We can develop a suitable concrete pumping station melting ice program combine the actualoperation of the project, Hydropower can eventually make more economical and automated way of solvingthe problem of ice damage...