Experimental setup to measure the heat-exchange processes by controlling thermal and hydraulic conditions

Abstract

The design of a Borehole Heat Exchanger (BHE) is based on the evaluation of the thermal exchange capacity of the whole system constituted by the probes and the surrounding ground. The energy performance of a BHE mainly depends on the thermal properties of the sediments, the possible groundwater flow and the changes in the thermal gradient in the probe's surroundings due to the continuous heat exchange with the subsoil. The interpretation of the in-field applications is often difficult because in many instances the information needed is unavailable due to difficulties of in-field

Novel Experimental Device to Monitor the Ground Thermal Exchange in a Borehole Heat Exchanger

“…Determination of the mass flow rate and heat rate using Equations (12) and (13). Data of a certain instant from the set of corrected temperature results in the permanent regime (inlet and outlet fluid temperatures) were used to calculate the mentioned parameters.…”

“…They are commonly used in the verification of numerical or analytical applications and can be implemented to describe a large number of thermodynamic processes [10,11]. In the specific geothermal heat exchange, some published researches are focused on the creation of experimental devices to analyze the thermal phenomena that takes place in a shallow geothermal system at laboratory scale (including different applications; heat pumps and heat-exchanger technologies; and energy recovery) [12][13][14][15][16].…”