Numerical Simulation Of Air-distribution And Several Special Fault Operation Analysis Of Ecuador(CCS) Hydroelectric Station

At present, as a form of energy for the sustainable development of hydropower,hydropower rapid development in the domestic and foreign, number and scale ofhydropower stations expanding constantly. Hydropower station generally located in theunderground,the main task of hydropower plants generator floor is discharge the excessheat and humidity produced by electrical equipment generators. Thus ensure the rangeof temperature、humidity and air velocity within the appropriate range. Provide asuitable environment for electrical equipment and staff.Xi’an university of science and technology building、 the Yellow River surveyplanning and design company, together responsible for Ecuador in South America, theclimate is a tropical rainforest climate CCS hydropower station underground ventilationand air conditioning theory research and design task analysis.In this paper, Author simulation and analysis airflow of Ecuador(CCS)hydropower plants generator floor by CFD, choose k-Equation model conductnumerical calculation, algorithm is SIMPLE algorithm, boundary conditions of isstandard wall function, For different air speeds and different outlet positions，thetemperature field and velocity flow chart of generator floor use speed uniformitycoefficientk v、temperature uniformity coefficientk tand energy utilization coefficient、PPV—PPD index and air distribution performance index ADPI to compositeevaluate and contrast. Proposed that under the airflow form provided by design institute,for generator floor, the most reasonable height is4.5m, the most reasonable air speed is5m/s. Under such conditions, air conditioning and ventilation system can get goodventilation effect, and save equipment investment. During operation of the hydropower, there are two special conditions, one is airconditioning outage, another is pressure gas turbine. This paper aims to study underthese two special conditions, the temperature and humidity condition inside the mainplant. When air conditioning outage, use full ventilation to control the temperature fieldof powerhouse In the evening, Numerical simulate conditions of different supply airtemperature in January, April, July and October in this paper, demonstrated thefeasibility of such air supply method. Under the condition of pressure gas turbine, theheat generated during compressed air enter to powerhouse, Indoor cooling loadincreases. Thus need to increase the amount of conditioned air. It is worth noting thatthe problem. Finally, analysis and calculate temperature field, velocity field, humidityfield of main powerhouse by numerical simulation In the case of air conditioning ratedair flow, and the analysis revealed that temperature field, velocity field, humidityfield，and put forward the technology countermeasures.