An innovative approach based on water environmental capacity for non-point source NPS pollution removal rate estimation was discussed by using both univariate and multivariate data analysis.Taking Shenzhen city as the...An innovative approach based on water environmental capacity for non-point source NPS pollution removal rate estimation was discussed by using both univariate and multivariate data analysis.Taking Shenzhen city as the study case a 67% to 74% NPS pollutant load removal rate can lead to meeting the chemical oxygen demand COD pollution control target for most watersheds.In contrast it is hardly to achieve the ammonia nitrogen NH4-N total phosphorus TP and biological oxygen demand BOD5 pollution control target by simply removing NPS pollutants. This highlights that the pollution control strategies should be taken according to different pollutant species and sources in different watersheds rather than one-size-fits-all .展开更多
近年来,随着变频恒温技术的发展,变频空调给需求响应(demand response,DR)控制策略带来了新的机遇与挑战。文章引入PMV-PPD(predicted mean vote-predicted percentage of dissatisfied)用户舒适度量化评估模型,提出了一种考虑热舒适度...近年来,随着变频恒温技术的发展,变频空调给需求响应(demand response,DR)控制策略带来了新的机遇与挑战。文章引入PMV-PPD(predicted mean vote-predicted percentage of dissatisfied)用户舒适度量化评估模型,提出了一种考虑热舒适度的多家庭变频空调群组恒温控制策略,综合考虑用户舒适体验和负荷削减容量最大化。首先,以用户热舒适度与空调负荷最大削减为目标,确定变频空调单机恒温控制的最优设定温度,建立了空调群组非分组恒温控制策略。然后,针对不同调度周期,分析评估空调群组非分组控制的可削减容量及机会响应损失;提出当调度周期在一定范围内时可以通过分组控制减少机会响应损失,建立了动态分组轮控策略模型,更加充分地挖掘了家庭空调负荷的需求响应潜力,并获得了可削减容量稳定的需求响应资源。最后,算例验证表明该策略的可行性和有效性。展开更多
基金The National Science and Technology Major Project of China(No.2012ZX07301-001)the Shenzhen Environmental Research Project,China Postdoctoral Science Foundation(No.2013M530642)
文摘An innovative approach based on water environmental capacity for non-point source NPS pollution removal rate estimation was discussed by using both univariate and multivariate data analysis.Taking Shenzhen city as the study case a 67% to 74% NPS pollutant load removal rate can lead to meeting the chemical oxygen demand COD pollution control target for most watersheds.In contrast it is hardly to achieve the ammonia nitrogen NH4-N total phosphorus TP and biological oxygen demand BOD5 pollution control target by simply removing NPS pollutants. This highlights that the pollution control strategies should be taken according to different pollutant species and sources in different watersheds rather than one-size-fits-all .
文摘近年来,随着变频恒温技术的发展,变频空调给需求响应(demand response,DR)控制策略带来了新的机遇与挑战。文章引入PMV-PPD(predicted mean vote-predicted percentage of dissatisfied)用户舒适度量化评估模型,提出了一种考虑热舒适度的多家庭变频空调群组恒温控制策略,综合考虑用户舒适体验和负荷削减容量最大化。首先,以用户热舒适度与空调负荷最大削减为目标,确定变频空调单机恒温控制的最优设定温度,建立了空调群组非分组恒温控制策略。然后,针对不同调度周期,分析评估空调群组非分组控制的可削减容量及机会响应损失;提出当调度周期在一定范围内时可以通过分组控制减少机会响应损失,建立了动态分组轮控策略模型,更加充分地挖掘了家庭空调负荷的需求响应潜力,并获得了可削减容量稳定的需求响应资源。最后,算例验证表明该策略的可行性和有效性。