Numerical Research and Parametric Study on the Thermal Performance of a Vertical Earth-to-Air Heat Exchanger System

<div>(a) The influence of diameters of ducts on the outlet air temperature in winter. (b) The influence of diameters of ducts on the outlet air temperature in summer.</div>

Mathematical Problems in Engineering

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Figure 12

Figure 12: Numerical Research and Parametric Study on the Thermal Performance of a Vertical Earth-to-Air Heat Exchanger System 