| In order to improve the problems of ecological environment damage,deterioration of living environment and increasing energy consumption along with theurban and new rural construction, speed up the construction of stereo greening intowns and countryside is an effective action to improve the ecological and livingenvironment as well as relieve the energy shortage according to the existing andpotential conditions of stereo greening in Guangzhou district towns and newcountryside. Stereo greening is a comprehensive greening form, vertical greening,roof greening, slope greening, three (the balcony, windowsill, terrace)greening and soon are included.This paper takes stonecrop greening roof with prefabricated hanging box greenwall stereo greening construction and vines cover type stereo greening construction inGuangzhou region as main research object. First of the main works is to participate inthe stereo greening construction of stonecrop greening roof and prefabricated hangingbox green wall with Nephrolepis cordifolia and dayflower. And then, the buildingindoor roof-vertical temperature and humidity variable values of the only stonecropgreening roof should be tested as well as the wind speed and solar irradiance variablevalues of prefabricated hanging box green wall and vines attached posture green wallparallel to the direction of wall space. The indoor thermal environment of stonecropgreening roof building and two stereo greening building are analyzed through the testresults. Finally, the energy simulation model of two types stereo greening building hasbeen set up respectively. Analysis the impact of two types stereo greening to thebuilding energy consumption through the energy consumption simulation results.From the test results, the outside roof surface temperature of the stonecropgreening roof is7.6oC centigrade lower than the comparison building and the averagetemperature of the outdoor small environment is2.1oC centigrade lower too. The average relative humidity of the outdoor small environment is4.8%higher. It hasbeen found that roof greening plays a role in cooling and humidification for thearchitectural outdoor environment. The inside roof surface temperature of thestonecrop greening roof is2.2oC centigrade lower than the comparison building andthe indoor average temperature is1.1oC centigrade lower too. Roof greening can playa role in cooling for the architectural indoor environment. In addition, roof greeningcan play a role in cooling in the time of higher temperature and play a role in thermalinsulation in the lower temperature period. The thermal insulation, delayed andthermal stability of the roof greening surface are better than the comparison building.Besides, the air velocity of prefabricated hanging box green wall and vines attachedposture green wall parallel to the direction of wall space is1.7m/s and2m/s lowerthan the outdoor environment. And the average solar irradiance of the wall surface is461W/m~2and430W/m~2lower than the distance of1m to the green leaf surface. Theanalysis results show that the wall surface heat transfer coefficient will decrease alongwith the wall surface wind speed parallel to the surface. It will affect indoor coolingload of wall heat directly. Reduced solar irradiance will make building outer wallsurface temperature reduce too, it also affect indoor cooling load of the wall heat.Comprehensive analysis shows that stereo greening can effectively improve thebuilding indoor thermal environment and outdoor tiny environment of Guangzhou inhot summer.In addition, energy consumption simulation results show that the air-conditioningenergy consumption difference of vines attached posture green wall and prefabricatedhanging box green wall is623.3kW·h and690.5kW·h compared to the non-stereogreening. If there are200families in a village124652.8kW·h and138102.6kW·henergy can be saved. The amount of energy saving will be a very large and significantvalue when extended to the whole Guangdong province. Energy saving effect isobvious. |
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