The Simulation Study Of Mitigating Heat Island Effect Based On Reversibly Used Cooling Tower

The continuous acceleration of urbanization has made urban environmental problems increasingly serious.The urban heat island effect,as a major problem facing the urban environment,not only affects the daily lives of urban residents,but also increases urban energy consumption.Therefore,how to mitigate the urban heat island effect has become a hot topic of current research.This article takes residential community as the research object,and proposes a new method based on the principle of reversibly used cooling towers to mitigate the urban heat island effect.The main researches are as follows:First of all,the current research methods to mitigate the heat island effect at home and abroad are summarized.By combining the relevant research theories of cooling towers,using cooling towers as heat absorption equipment,using low-temperature groundwater and high-temperature outdoor air for heat exchange,reducing outdoor air,and achieving The purpose of alleviating urban heat islands.Then it elaborates the theoretical research of outdoor thermal environment in detail,and provides a theoretical basis for the numerical simulation of the thermal environment of the community.Thirdly,through the experimental test of the cooling temperature of the cooling tower during the summer operation,the test results were analyzed,and it was found that the heat transfer amount on the air side and the heat transfer amount on the groundwater side satisfy the energy balance relationship,with an error of ±5%.The average difference between inlet and outlet air temperature is 2.4?,which proves that the cooling tower has the ability to reduce the air temperature.At the same time,the performance of the cooling tower under different water flows and air flows has been studied.The energy efficiency ratio of the cooling tower can reach up to 27.7,which reflects that the superiority of cooling towers for air cooling.Fourth,the CFD simulation method is used to analyze the thermal environment of an actual residential area in Shenyang.By simulating the thermal environment of the residential area,the heat island intensity of the residential area is 1.9?.The effect will bring adverse effects to the residents of the community.On this basis,a cooling tower model was added to simulate the thermal environment of the residential area.It was found that the average temperature of the residential area decreased,the heat island intensity became 1?,the local area heat island effect was alleviated,and the thermal environment of the residential area was improved.The ability to improve the thermal environment.Finally,the economic analysis of the benefits brought by the summer operation of the cooling tower,it is obtained that the cooling tower operation has an underground heat supplyof 390 k W,the surrounding air environment within 3 floors of the community is reduced by1?,the cooling load of the air conditioning is saved by 76 k W,and the total electricity cost saved by the Shenyang cooling period 9462 yuan,saving 80 yuan per household.Providing new ideas for mitigating the heat island effect.