Mechanical Ventilation (Air Conditioning) Model Experiment Of Longtan Hydropower Station's Underground Houses

Ventilation and air conditioning of the underground hydropower station is not only associated with man's health, but also with equipment's natural work. Longtan, as the largest underground hydroelectric station in China, because of its complicated structure of underground holes, the ventilation and air conditioning design is a complicated and systemic engineering. So asking for help from the ventilated model to experiment the rationality of designation of ventilation seems very important. At the same time, gained conclusions can provide worthy reference for other water power station. Nowadays, researches about underground hydropower station mainly focus on air-flow organization and characteristic of thermal environment etc. It is the first time to make a mechanical ventilation and air conditioning model experiment for the whole factory. Bases on theory analysis, this thesis asks for help from the similarity principle and similarity three-laws of hydromechanics, applies methods of law analysis and equation analysis, and has the assumptive condition of simulation and original mold's geometry scale, to deduce parameters' simulation scale, which builds theory foundation for experiments of model. This paper studies some technique of experiment such as thermocouple's jointing and wind speed measuring , it gets some regressed expressions about C of wind speed measuring sensor, and analyses it with theoretics. The mechanical and thermal ventilation model experiment is divided into mechanical ventilation in spring and mechanical ventilation (air conditioning)in summer. With the variation of equipments run-condition and outdoor meteorological condition, we study temperature and ventilation distribution in the factory, thereout can verify the rationality of ventilated design of prototype and put forward the measure of improving its ventilation: adds the number of coolers in upper level of busbar tunnel , lay coolers separately, control the work of coolers through inspecting temperature in holes. This paper mainly studies the condition of ventilation balance, on the basis of model experiment. It summarizes the basic rules of ventilation balance in longtan hydropower station's underground houses: under the condition of mechanical ventilation , the air-volume distribution in not balanceable, and the ventilation balance will change with the variation of equipments run-condition . Finally , the paper gets some key conclusions and put some forward reasonable suggestions to the design of the prototype ventilation. And the experiment is still incomplete, which should be improved in further experiment.