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在过去四年里,我们一直合作进行地源热泵换热管网对地下水水质影响的研究。进行透水性路面系统与地源热泵技术联合使用,来处置和循环利用城市道路路面的雨水径流,是一项新颖的和适时的研究内容,但需要额外考虑路面结构对可持续性可能产生的影响。在外部条件受控的室内环境和非受控的室外环境中,进行本课题的试验研究,试验装置由六种模拟路面系统组成,其中有些路面系统还用一种罐装液体来模拟被狗粪便污染的路面雨水径流。在透水性路面的基础层中埋设地源热泵的换热管网,用于调节建筑物的制热、制冷,它肯定会对透水性路面系统内储蓄的水的温度产生影响。研究表明,尽管储蓄于路面系统内的水温最高可增加到25℃,但由于路面本身起着“散热器”的作用,因此启动地源热泵对建筑物进行制热或制冷时,透水性路面系统中水质变化的波动仍相对较小。本文还评估土工布对渗透进入透水性路面的水质的影响,以及对储蓄于路基基础层内的水进行“精处理”的重要性。检测报告说明,铺设有土工布的混凝土路面砖透水性路面系统,对生化需氧量的平均去除率为99%,氨氮的平均去除率为95%,正磷酸盐———磷酸盐的平均去除率为96%。尽管已经预料到水温较热时可能会引起致病细菌数量的增加,但水中微生物含量还是比较理想的,军团杆菌存在是稀疏的;与水温变化因素相比,军团杆菌存在的可能性与有机污染物含量的关系更为密切。研究表明,沙门氏菌、大肠杆菌、粪链球菌和军团杆菌都没有在透水性路面基层储蓄水中长期生存。希望这项工作能消除一些对透水性路面系统内水质的担忧,并说明在透水性路面系统中铺设地源热泵技术的创新,不会导致渗透进入地下土壤水质的降低。
In the past four years, we have been cooperating in the study of the impact of ground source heat pump heat exchange pipe network on groundwater quality. The combination of a water-permeable pavement system and ground-source heat pump technology to deal with and recycle rainwater run-off from urban road pavements is a novel and timely study but requires additional consideration of the possible impact of pavement structure on sustainability . The experimental study of the subject was carried out in a controlled indoor environment and an uncontrolled outdoor environment. The test device consisted of six simulated pavement systems. Some of these pavement systems used a can liquid to simulate the effects of being excreted Polluted pavement rainwater runoff. Buried in the base layer of the water-permeable pavement ground-source heat pump heat exchange pipe network, used to regulate building heating, cooling, it will certainly have an impact on the water temperature within the water-permeable pavement system savings. The study shows that although the maximum temperature of water stored in the pavement system can be increased to 25 ℃, since the pavement itself acts as a “radiator”, when the ground source heat pump is started to heat or cool the building, the water permeability The variation of water quality in pavement system is still relatively small. The paper also assesses the effect of geotextiles on the water quality of infiltrated permeable pavement and the importance of “finishing” the water stored in the subgrade. Test report shows that the laying of geotextile concrete pavement water-permeable pavement system, the average removal of biochemical oxygen demand was 99%, the average removal rate of ammonia nitrogen was 95%, the average removal of orthophosphate --- phosphate The rate is 96%. Although it has been predicted that the hot water temperature may cause an increase in the number of pathogenic bacteria, but the microbial content in water is still relatively ideal, Legionella exists sparsely; compared with the variation of water temperature, Legionella possibilities and organic pollution The relationship between content is more closely. Studies have shown that Salmonella, Escherichia coli, Streptococcus faecalis, and Legionella do not survive long-term water savings in water-based pavement base stocks. It is hoped that this work will eliminate some of the concerns about water quality in water-permeable pavement systems and illustrate that innovations in laying ground-source heat pumps in water-permeable pavement systems will not lead to a reduction in the quality of infiltrated soils.