| Title |
Sensitivity Analysis on Design Factor of Ground Heat Exchanger for Optimum Design of Vertical Ground Source Heat Pump System |
| Authors |
Bae, Sangmu ; Kim, Hongkyo ; Nam, Yujin |
| DOI |
https://doi.org/10.5659/JAIK_SC.2018.34.3.87 |
| Keywords |
Ground Source Heat Pump(GSHP) System ; Ground Heat Exchanger(GHX) ; Design Factor ; Sensitivity Analysis |
| Abstract |
Ground source heat pump(GSHP) system is one of the high efficiency heat source systems which utilizes the constant geothermal energy of a underground water or soil. However, the design of conventional GSHP system in the domestic market is dependent on the experience of the designer and the installer, and it causes increase of initial installation cost or degradation of system performance. Therefore, it is necessary to develop a guideline and the optimal design method to maintain stable performance of the system and reduce installation cost. In this study, in order to optimize the GSHP system, design factors according to ground heat exchanger(GHX) type have been examine by simulation tool. Furthermore, the design factors and the correlation of a single U-tube and a double U-tube were analyzed quantitatively through sensitivity analysis. Results indicated that, the length of the ground heat exchanger was greatly influenced by grout thermal conductivity for single U-tube and pipe spacing for double U-tube. |