不同埋管形式的地理管换热试验及数值模拟研究
发布时间:2019-07-09 08:06
【摘要】:地埋管地源热泵换热系统作为一种经济有效的利用浅层地温能节能技术,在能源问题日益严重的今天受到了广泛关注。本文针对当前地埋管换热器研究的现状,结合实际工程,对不同埋管形式下的地埋管换热器的换热性能进行了一系列研究。本文依托实际工程,对位于南京市浦口区的某绿色产业园的垂直地埋管换热器进行了现场试验研究。为比较不同埋管形式下的地埋管换热器换热性能,本文亦利用实际工程条件,铺设了水平螺旋埋管和地下室底板埋管,进行了现场试验。引入单位管长每延米换热效率参数,通过试验总结了地埋管换热器的换热规律。在现场试验的基础上,本文利用Fluent数值模拟软件,对各埋管形式下的地埋管换热器进行了相应的数值建模工作,介绍了数值建模的一般步骤。为验证数值模拟手段的可靠性,对实测结果与数值模拟结果进行了对比,为换热器换热性能及经济性分析建立了基础。为量化各影响因素对地埋管换热器的影响程度,本文以目前应用最为广泛的垂直双U地埋管换热器为例,利用数值模拟手段,对各影响因素的影响程度进行了深入分析研究。在研究中,亦搜集了相关工程案例,结合地源热泵设计的相关规范与工程实际情况,对地埋管换热器的优化设计提出了建议。最后,本文对不同埋管形式下各换热器的换热性能进行了对比分析,提出了各埋管形式换热性能的经济性评价指标,对比分析了各埋管形式的经济性。结合工程实例,量化了其经济性指标,总结了不同埋管形式的适用性。
文内图片:
图片说明:地埋管地源热泵系统示意图
[Abstract]:As an economical and effective energy saving technology for shallow ground temperature energy, buried pipe ground source heat pump heat transfer system has been paid more and more attention in today's energy problem. In view of the present research situation of buried pipe heat exchanger and combined with practical engineering, a series of studies on the heat transfer performance of buried pipe heat exchanger under different buried pipe forms are carried out in this paper. Based on the practical project, the vertical buried pipe heat exchanger in a green industrial park in Pukou District of Nanjing City is tested and studied in this paper. In order to compare the heat transfer performance of buried pipe heat exchanger under different buried pipe forms, the horizontal spiral buried pipe and basement floor buried pipe are also laid by using the actual engineering conditions, and the field test is carried out. The heat transfer efficiency parameters per kilometer per unit length are introduced, and the heat transfer law of buried pipe heat exchanger is summarized through experiments. On the basis of field test, this paper uses Fluent numerical simulation software to carry on the corresponding numerical modeling work to the buried pipe heat exchanger under each buried pipe form, and introduces the general steps of the numerical modeling. In order to verify the reliability of the numerical simulation method, the measured results are compared with the numerical simulation results, which establishes the basis for the heat transfer performance and economic analysis of the heat exchanger. In order to quantify the influence degree of each influencing factor on the buried pipe heat exchanger, taking the vertical double U buried pipe heat exchanger, which is the most widely used at present, as an example, the influence degree of each influencing factor is deeply analyzed and studied by means of numerical simulation. In the study, the relevant engineering cases are also collected, and combined with the relevant specifications and engineering practice of the ground source heat pump design, some suggestions for the optimal design of the ground pipe heat exchanger are put forward. Finally, the heat transfer performance of each heat exchanger under different buried pipe forms is compared and analyzed, the economic evaluation index of heat transfer performance of each buried pipe form is put forward, and the economy of each buried pipe form is compared and analyzed. Combined with an engineering example, the economic index is quantified and the applicability of different buried pipe forms is summarized.
【学位授予单位】:南京大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TK172
本文编号:2512001
文内图片:
图片说明:地埋管地源热泵系统示意图
[Abstract]:As an economical and effective energy saving technology for shallow ground temperature energy, buried pipe ground source heat pump heat transfer system has been paid more and more attention in today's energy problem. In view of the present research situation of buried pipe heat exchanger and combined with practical engineering, a series of studies on the heat transfer performance of buried pipe heat exchanger under different buried pipe forms are carried out in this paper. Based on the practical project, the vertical buried pipe heat exchanger in a green industrial park in Pukou District of Nanjing City is tested and studied in this paper. In order to compare the heat transfer performance of buried pipe heat exchanger under different buried pipe forms, the horizontal spiral buried pipe and basement floor buried pipe are also laid by using the actual engineering conditions, and the field test is carried out. The heat transfer efficiency parameters per kilometer per unit length are introduced, and the heat transfer law of buried pipe heat exchanger is summarized through experiments. On the basis of field test, this paper uses Fluent numerical simulation software to carry on the corresponding numerical modeling work to the buried pipe heat exchanger under each buried pipe form, and introduces the general steps of the numerical modeling. In order to verify the reliability of the numerical simulation method, the measured results are compared with the numerical simulation results, which establishes the basis for the heat transfer performance and economic analysis of the heat exchanger. In order to quantify the influence degree of each influencing factor on the buried pipe heat exchanger, taking the vertical double U buried pipe heat exchanger, which is the most widely used at present, as an example, the influence degree of each influencing factor is deeply analyzed and studied by means of numerical simulation. In the study, the relevant engineering cases are also collected, and combined with the relevant specifications and engineering practice of the ground source heat pump design, some suggestions for the optimal design of the ground pipe heat exchanger are put forward. Finally, the heat transfer performance of each heat exchanger under different buried pipe forms is compared and analyzed, the economic evaluation index of heat transfer performance of each buried pipe form is put forward, and the economy of each buried pipe form is compared and analyzed. Combined with an engineering example, the economic index is quantified and the applicability of different buried pipe forms is summarized.
【学位授予单位】:南京大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TK172
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