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A new constant heat flux model for vertical U-tube ground heat exchangers
Highlights ► A new cumulative constant heat flux model for U-tube ground heat exchangers (GHE) is presented. ► The model is developed by reconstructing an experiment-verified finite-volume model. ► The model may be used to exactly develop borehole resistance and short time-step temperature response factors. ► The model is the most detailed constant heat flux model of GHE known currently.
Abstract Vertical U-tube ground heat exchangers (GHEs) are a key component in geothermal energy utilization systems like ground source heat pumps (GSHPs). This paper presents a new constant heat flux model of its. Different from the existing uniform constant heat flux (UCHF) model, the model proposed in this paper is a cumulative constant heat flux (CCHF) model. The model is developed by reconstructing an experiment-verified three-dimensional unstructured finite-volume model. Applying the model, the borehole resistance with any geometric structure can be found. In addition, it may be used to develop the short time-step temperature response factors (TRFs) for simulating the behavior of the GHE on a short-time-step basis (one hour or less).
A new constant heat flux model for vertical U-tube ground heat exchangers
Highlights ► A new cumulative constant heat flux model for U-tube ground heat exchangers (GHE) is presented. ► The model is developed by reconstructing an experiment-verified finite-volume model. ► The model may be used to exactly develop borehole resistance and short time-step temperature response factors. ► The model is the most detailed constant heat flux model of GHE known currently.
Abstract Vertical U-tube ground heat exchangers (GHEs) are a key component in geothermal energy utilization systems like ground source heat pumps (GSHPs). This paper presents a new constant heat flux model of its. Different from the existing uniform constant heat flux (UCHF) model, the model proposed in this paper is a cumulative constant heat flux (CCHF) model. The model is developed by reconstructing an experiment-verified three-dimensional unstructured finite-volume model. Applying the model, the borehole resistance with any geometric structure can be found. In addition, it may be used to develop the short time-step temperature response factors (TRFs) for simulating the behavior of the GHE on a short-time-step basis (one hour or less).
A new constant heat flux model for vertical U-tube ground heat exchangers
Li, Zhongjian (author)
Energy and Buildings ; 45 ; 311-316
2011-11-17
6 pages
Article (Journal)
Electronic Resource
English
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