某场地岩土热响应试验分析OA

The proposed project of a new scientific research office building covers an area of approximately 130 000 m2,with a total building area of about 40 000 m2.The main construction content includes a 5-story above-ground and 1-story underground office building along with ancillary facilities such as plazas,roads and carports.Based on the principles of reliability,cost-effectiveness,environmental sustainability and priority utilization of renewable energy,a hybrid HVAC system combining ground-source heat pumps,water-cooled chillers and cooling towers is adopted in this project.The comprehensive thermal properties of subsurface strata in buried pipe are critical parameters for the design of ground heat exchanger system.To determine the ground original temperature and thermal properties,as well as the linear heat transfer of exchange hole,a thermal response test(TRT)was conducted through test holes installed at construction site.The test results show that the initial average ground temperature is 19.22℃,the average volumetric specific heat capacity is 2.55×103 kJ/(m3· K),the average thermal conductivity is 2.18 W/(m · K),and the linear heat extraction rate during winter or summer is 44.6 or 54.7 W/m respectively,which can be used as the main basis for system design.