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http://dx.doi.org/10.6110/KJACR.2014.26.9.416

Verification of the Boundary Conditions Used for Generating g-functions and Development of a TRNSYS Simulation Model Using g-functions  

Kim, Eui-Jong (Center for Energy and Thermal Sciences of Lyon, INSA de Lyon)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.26, no.9, 2014 , pp. 416-423 More about this Journal
Abstract
To verify different boundary conditions on the borehole wall, which are commonly used for generating g-function, the well-known TRNSYS simulation model, DST (Duct STorage), is employed. By letting the fluid circulation determine the borehole wall conditions, a DST-based g-function is induced with numerical processes proposed in this work. A new TRNSYS module is also developed to accommodate g-function data and predict dynamic outlet fluid temperatures. Results showed that the modified g-function, which is different from Eskilson's original g-function, is closer to the DST-based g-function. This implies that the uniform heat transfer rates over the height can be used for good approximation. In fact, simulations with the modified g-function showed similar results as the DST model, while Eskilson g-function case deviated from the DST model as time progressed.
Keywords
g-function; Differences in boundaries; DST; TRNSYS simulation model;
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Times Cited By KSCI : 1  (Citation Analysis)
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