Knowledge Resource Center for Ecological Environment in Arid Area
| Shallow Horizontal GCHP Effectiveness in Arid Climate Soils | |
| [null] | |
| 出版年 | 2014 |
| 学位授予单位 | North, Timothy (Author), Kavazanjian, Ed (Advisor), Redy, T. Agami (Committee member), Zapata, Claudia (Committee member), Arizona State University (Publisher) |
| 英文摘要 | abstract: Ground coupled heat pumps (GCHPs) have been used successfully in many environments to improve the heating and cooling efficiency of both small and large scale buildings. In arid climate regions, such as the Phoenix, Arizona metropolitan area, where the air condi-tioning load is dominated by cooling in the summer, GCHPs are difficult to install and operate. This is because the nature of soils in arid climate regions, in that they are both dry and hot, renders them particularly ineffective at dissipating heat. The first part of this thesis addresses applying the SVHeat finite element modeling soft-ware to create a model of a GCHP system. Using real-world data from a prototype solar-water heating system coupled with a ground-source heat exchanger installed in Menlo Park, California, a relatively accurate model was created to represent a novel GCHP panel system installed in a shallow vertical trench. A sensitivity analysis was performed to evaluate the accuracy of the calibrated model. The second part of the thesis involved adapting the calibrated model to represent an ap-proximation of soil conditions in arid climate regions, using a range of thermal properties for dry soils. The effectiveness of the GCHP in the arid climate region model was then evaluated by comparing the thermal flux from the panel into the subsurface profile to that of the prototype GCHP. It was shown that soils in arid climate regions are particularly inefficient at heat dissipation, but that it is highly dependent on the thermal conductivity inputted into the model. This demonstrates the importance of proper site characterization in arid climate regions. Finally, several soil improvement methods were researched to evaluate their potential for use in improving the effectiveness of shallow horizontal GCHP systems in arid climate regions. Dissertation/Thesis Masters Thesis Civil Engineering 2014 |
| 英文关键词 | Civil engineering Sustainability Energy |
| 语种 | 英语 |
| URL | http://hdl.handle.net/2286/R.I.27552 |
| 来源机构 | Arizona State University |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/248387 |
| 推荐引用方式 GB/T 7714 | [null]. Shallow Horizontal GCHP Effectiveness in Arid Climate Soils[D]. North, Timothy (Author), Kavazanjian, Ed (Advisor), Redy, T. Agami (Committee member), Zapata, Claudia (Committee member), Arizona State University (Publisher),2014. |
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