Green Building Water Saving Control Strategy And Device Based On Water Quality Type Rainwater Abandonment In Guangdong Province

According to relevant statistics in 2012,the per capita freshwater resources in China are only 2,100 cubic meters,which is about 28% of the world's per capita freshwater resources.It is one of the countries with the world's most per capita water resources.In Guangdong Province,due to the large amount of untreated waste water being discharged into other bodies of water,resulting in serious pollution of fresh water resources and water shortages,there is a phenomenon of water shortage.Therefore,the water-saving,energy-saving,land-saving,material-saving and environmental protection pursued by green buildings are the only way for the transformation of China's construction industry from a high energy consumption development model to a scientific and efficient ecological development model.This paper closely follows the country's policy of constructing a“sponge city”,and aims at the green building characteristics of Guangdong and studies its applicable water-saving strategies.Based on the multi-year rainfall data of the Guangdong region,this guides the design of a suitable volume for a rainwater reservoir in the central Guangdong region.Aiming at the problem of abandonment of rain in the use of green buildings,this paper adopts modern intelligent control technology to design and manufacture a water quality rainwater abandonment system,and conducts an experimental test on system reliability.In this paper,the following researches have been conducted on the green building water saving strategies and devices in Guangdong:The annual rainfall in Guangdong,Guangdong,Guangdong,Guangdong,and Guangdong during the period from 1995 to 2015 was collected.According to the analysis,the average annual precipitation in northern Guangdong,eastern Guangdong,central Guangdong,and western Guangdong was 1655.5mm and 1559.6mm respectively.1904.7mm,1679.7mm,because of the large annual rainfall in some areas,so the partition study is very necessary.Saving water in green buildings is mainly to increase revenues and reduce expenditures.Among them,the open source part mainly adopts rainwater control and utilization technology,and it is designed for the volume of the reservoir,which is one of thekey points of rainwater utilization.The typical building area with a land area of 100000 ?in the central area of Guangdong is For example,the daily water balance method was used for the simulation calculation of the volume of the rainwater reservoir,and it was finally determined that when the volume of the stormwater reservoir was set at 200m3,it was most reasonable.This example can provide reference for similar projects in other areas of Guangdong.This paper addresses the key issues of rainwater discharge in rainwater use,improves the problem of the discharge flow on the market,uses PLC as the main controller,and determines that the conductivity of >300?S/cm is used as the criterion for the abandonment of rainwater.A set of rainwater can be designed and produced.The water quality is a water quality type rainwater abandonment system for real-time and accurate abandonment.According to the system principle and control principle,the relevant PLC control program was written,and the device was tested for reliability.The experiment was divided into 2 groups of 8 experiments in total.The devices were able to collect experimental water with conductivity ? 300 ?S/cm according to the control requirements.