Research On Urban Park Enhan Cement Design Based On Thermal Comfort Improvement

Climate is an important factor in the creation and development of landscape gardens.With the intensification of global climate change,urban parks as public and open spaces in cities are of great significance in improving the thermal comfort of the outdoor environment.The use of numerical simulation techniques to carry out research on the mechanism of microclimate effects in park environments has been a hot topic of microclimate effects research in recent years.This thesis compares and analyses the effects of different landscape components on thermal comfort on the basis of field measurements of park microclimate characteristics in summer and winter,and qualitatively analyses the correlation between different landscape components and park microclimate effects and human comfort;On this basis,the correlation between different types and proportions of landscape components and the park’s microclimate effect and human comfort was quantitatively analysed in combination with numerical simulations by ENVI-met software,and the resulting conclusions were combined to propose strategies for improving and enhancing the park’s thermal comfort and optimising the park’s localisation.The main conclusions of the study are as follows:(1)Qualitative research grounded in field measurement and analysis: there are significant seasonal differences in the level of microclimate effects and human comfort improvements between the various landscape components,with different components having different effects on microclimate and human thermal comfort.There are highly significant effects on air temperature and cooling intensity in summer and significant effects in winter;there are no significant effects on relative humidity and humidification intensity;the results show that the total cooling and humidification of the woodland is the best in both seasons and that the cooling and humidification of the hard paving is the worst.The effect of landscape composition element type on human comfort is highly significant in summer and significant in winter.This is reflected in the fact that woodland comfort conditions are the best and hard paving the worst.Overall,woodland has the most significant cooling and humidifying effect and human comfort enhancement effect in the park microenvironment;there are significant differences in microclimate effects between woodland and other landscape component types.The proportion of woodland in the park is significantly and positively correlated with its cooling and humidifying effects and with the improvement of human thermal comfort,and the larger the proportion of woodland,the better its cooling and humidifying effects and the higher the human comfort level.A quantitative study based on numerical simulation and analysis: the prediction errors were evaluated and the RMSE values for temperature and humidity were0.46℃ and 3.8%,and the MAPE values were 1.92% and 9.92% respectively.Drawing on the validation of previous numerical simulation results,it can be concluded that the model is valid and reliable,and that the numerical simulation method can be applied to the subject of this thesis.Under the condition that the total area of the park is kept constant,the woodland cover is significantly and positively correlated with the cooling and humidifying effect of the park and the improvement of human comfort level,and parks with higher woodland cover have better cooling and humidifying effect and higher human comfort level.In parks,every 10%increase in woodland area and corresponding reduction in the area of hard paving can lead to a1-3℃ drop in temperature,a rise in relative humidity of around 0.65% and an increase in human thermal comfort of around 0.01.Under the condition that the green space rate and the total area of the park remain unchanged,the cooling and humidifying effect of the water surface in the park is significantly higher than the cooling and humidifying effect of the hard paved surface in the park.(2)On this basis,the visualisation data obtained from field observations and ENVI-met simulations are used to study measures to enhance and improve the thermal comfort of urban parks at various levels,including plants,paving,water bodies and landscape space layout.Using ENVI-met technology,the optimised scheme design of Mao Ling Shan Park is simulated and evaluated.The results show that compared to the actual design of the park,the optimised design has a significant improvement in temperature and humidity,and the average thermal comfort index of PET has decreased by 7.3℃.The optimisation scheme proposed in this thesis is effective in improving thermal comfort within Mao Ling Shan Park and will provide new ideas and perspectives for the design and enhancement of parks of similar scale and climate conditions.