| Title |
A Study on the Determining Initial Ignoring Time for the Analysis of Ground Thermal Conductivity of SCW Type Ground Heat Exchanger |
| Authors |
장근선(Keun-Sun Chang) ; 김민준(Min-Jun Kim) ; 김영재(Young-Jae Kim) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2014.26.10.453 |
| Keywords |
SCW ; GHX ; 평균자승오차법 ; 라인소스방법 ; 지중 열전도도 Standing Column Well ; Ground heat exchanger ; Mean Square Error method ; Line source method ; Ground thermal conductivity |
| Abstract |
This paper presents an analysis on the initial ignoring time of SCW type GHX using Mean Square Error method. Line source method is a useful method for estimating the ground thermal conductivity for the vertical type and SCW type GHX in Korea. The line source method for ground thermal conductivity of geothermal in-site test is the basis of linear approximation between the temperature of a borehole and logarithmic time in a GHX. To apply the line source method to the estimation of SCW type GHX, it is necessary to ignore the initial time of data at the stage of a linear approximation. This paper proposed a new initial ignoring time of SCW type GHX among various initial ignoring time at the time for reaching MSE of 0.02 ℃2. |