Thermal response functions are commonly used to describe the heat exchange capability of ground exchangers. When convolved with thermal load, they allow for a quick and efficient prediction temperature evolution. Typically, obtained through physical models transfer process. However, can also be reconstructed directly from real experimental data, such as measurements fluid leaving boreholes. Here we reconstruct monitoring data 40 borehole Each is connected horizontal pipe one three...

Thermal response test interpretation methods usually rely on the assumptions of constant operating conditions in time. However, through desired or undesired processes, these often vary Since is done with stationary methods, no current algorithm allows to account for non-stationarity thermal test, as encountered varying flow rate. The goal this article apply a multi-deconvolution retrieve set short-term transfer functions during changing conditions. deconvolution uses an optimization-based...

Ground-coupled heat pump systems exchange between a building and the surrounding ground. To simulate ground exchanger (GHE), transfer function is commonly used. This represents ground's capacity to energy. Its use allows for simulation of response different load patterns. The process affected by key factors such as thermal properties groundwater flow. Accurate evaluation critical designing GHE field meet needs heating cooling. its over time range from seconds years operation. long-term...

The ASHRAE sizing equation is widely used to find the length of a ground heat exchanger required cover given thermal load. Some methods use concept g-functions, based on finite line source model, compute resistances by equation. Such g-functions are defined at borehole wall and do not incorporate short-term features boreholes such as fluid residence time capacity, thus readily applicable simulation outlet temperature. This article proposes an adaptation alternative Ahmadfard Bernier (2018)...

To design a ground heat exchanger, simulations are frequently used.One way to perform is use the well-known g-functions obtain temperature.These functions usually obtained by analytical or numerical models, which limits precision takes long simulation time.Recent advances show that short-term can also be retrieved deconvolution algorithm.However, known algorithm only validated for set of operating parameters and duration less than 10 days.A first objective this article demonstrate longer...

Distributed thermal response tests offer the possibility to retrieve both effective and depth-dependant conductivity profile of a ground heat exchanger. The purposes this paper are apply deconvolution method on distributed test data showcase advantages using short-term transfer function (STgF)Â calculate values at each geological layer from conventional interpretation method. To achieve that, is separated in layers which set STgFs estimated. Results show that exchanger outlet, estimated with...

Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL Multi-Deconvolution Non-Stationary Conditions Applied Experimental Thermal Response Test Analysis Obtain Short-Term Transfer Functions 13 Pages Posted: 2 Aug 2022 See all articles by Gabriel DionGabriel Dionaffiliation not provided SSRNPhilippe PasquierEcole Polytechnique de MontrealDenis Marcotteaffiliation SSRNGabrielle Beaudryaffiliation SSRN Abstract