We analyzed the heat conductivity and volumetric heat capacity of sandy soil contaminated in two scenarios of oil pollution, and also determined the temperature dependencies of these changed thermophysical properties....We analyzed the heat conductivity and volumetric heat capacity of sandy soil contaminated in two scenarios of oil pollution, and also determined the temperature dependencies of these changed thermophysical properties. In the first pollution scenario, the oil product was introduced into wet river sand, and in the second case, dry sand was contaminated by the oil product and was then moistened with water. By considering these two scenarios as multicomponent dispersion systems with varying degrees of contamination and humidity, and by using a polystructural granular model with pore spaces and closed inclusions, we calculated that the heat conductivity of the sandy soil increased under the first pollution scenario and decreased under the second, but the change in the volumetric heat capacity of the sandy soil was proportional only to the amount of oil pollution, not the manner in which it was introduced. We also determined the temperature dependencies of these two thermophysical properties of sandy soil when polluted by oil, of which information will be useful for future containment and remediation of oil-contaminated soil.展开更多
针对南京工程学院的天印湖水源热泵系统,建立了三维传热模型。通过FLUENT软件的用户自定义函数,使用计算机C语言程序编写适用于该模型的UDF(use-defined function),把它导入FLUENT来模拟湖水源热泵温排水对湖水温度场的影响,同时从理论...针对南京工程学院的天印湖水源热泵系统,建立了三维传热模型。通过FLUENT软件的用户自定义函数,使用计算机C语言程序编写适用于该模型的UDF(use-defined function),把它导入FLUENT来模拟湖水源热泵温排水对湖水温度场的影响,同时从理论上计算了湖水源热泵系统的COP(coefficient of performance)。通过实验验证了该模型的正确性。针对模拟和实验分析的结果,对湖水源热泵埋管的布置提出了合理的建议。展开更多
文摘We analyzed the heat conductivity and volumetric heat capacity of sandy soil contaminated in two scenarios of oil pollution, and also determined the temperature dependencies of these changed thermophysical properties. In the first pollution scenario, the oil product was introduced into wet river sand, and in the second case, dry sand was contaminated by the oil product and was then moistened with water. By considering these two scenarios as multicomponent dispersion systems with varying degrees of contamination and humidity, and by using a polystructural granular model with pore spaces and closed inclusions, we calculated that the heat conductivity of the sandy soil increased under the first pollution scenario and decreased under the second, but the change in the volumetric heat capacity of the sandy soil was proportional only to the amount of oil pollution, not the manner in which it was introduced. We also determined the temperature dependencies of these two thermophysical properties of sandy soil when polluted by oil, of which information will be useful for future containment and remediation of oil-contaminated soil.
文摘针对南京工程学院的天印湖水源热泵系统,建立了三维传热模型。通过FLUENT软件的用户自定义函数,使用计算机C语言程序编写适用于该模型的UDF(use-defined function),把它导入FLUENT来模拟湖水源热泵温排水对湖水温度场的影响,同时从理论上计算了湖水源热泵系统的COP(coefficient of performance)。通过实验验证了该模型的正确性。针对模拟和实验分析的结果,对湖水源热泵埋管的布置提出了合理的建议。
