技术开发、技术转让、技术咨询、技术服务；工程项目管理；检测服务；销售机械设备、五金交电、电子产品、计算机、软件及辅助设备、通讯设备、汽车配件、矿产品（不含煤炭及石油制品）；会议服务；计算机技术培训（不得面向全国招生）；建材批发；工程勘察设计；专业承包；认证服务。（市场主体依法自主选择经营项目，开展经营活动；认证服务以及依法须经批准的项目，经相关部门批准后依批准的内容开展经营活动；不得从事国家和本市产业政策禁止和限制类项目的经营活动。）
In order to study the wind environment problems in the old community,taking the residential zone of Henan University of Science and Technology in Luoyang City,Henan Province,as the research object,taking the original meteorological data of Zhengzhou City as the data source,substituting it into Phoenics as a boundary condition to simulate the wind environment,and combining the relevant technical standards of green buildings to analyze the wind speed and wind pressure of the dominant wind in July.Some improvement measures for the existing wind environment problems in the campus were provided,and the wind environment was simulated again after the improvement.The results showed that by overhead the ground floor of the first row of windward buildings and appropriately increasing the wind direction angle,the outdoor average wind speed was increased by 0.7 m/s,which had a good improvement on the wind environment of the residential zone and building energy consumption,and also verified the feasibility and importance of CFD simulation in architectural planning and design.
Carbon dioxide（CO 2 ） air-source heat pumps have broad application prospects because of their excellent environmental protection potential and thermal performance. In this study, the CO 2 cascade air-source heat pump was implemented in distributed central heating systems in a public building in Qinhuangdao City and a residential building in Shijiazhuang City. Both cases were tested and analyzed to explore the uncertainty of measurements and the operation performance in extremely cold conditions as per the Standard for Energy Efficiency Test of Public Buildings JGJ/T 177—2009 and the Standard for Energy Efficiency Test of Residential Buildings JGJ/T 132—2009. Based on the uncertainty analysis, the relative combined standard uncertainty ranges of COP（coefficient of performance） of #2 units operating at various ambient temperatures in Qinhuangdao and Shijiazhuang were found to be 4.27%-5.87% and 1.90%-4.36%, respectively. These ranges reveal that the measurements have high reliability. The measured daily heating COP of #1 and #2 units in Qinhuangdao are 2.75-3.09 and 2.76-3.15, respectively, when the outdoor daily temperature range is-10.9-2.5 ℃. Even in the lowest outdoor temperature（-18 ℃）, the heating COP of #1 and #2 units can still reach 2.19 and 2.88, respectively. When #1 and #2 units operate in Shijiazhuang with the outdoor daily temperature being-6.6-12.5 ℃, the measured daily heating COP are 2.32-3.38 and 2.21-3.06, respectively. The analysis of these two projects shows that the heating COP of the CO 2 cascade air-source heat pump is not sensitive to the ambient temperature in extremely cold conditions.
