Measurements and Design Calculations for a Deep Coaxial Borehole Heat Exchanger in Aachen, Germany

Figure 14

With real data of climatic temperature of the first half of 2005, the associated need for heating and chilling is calculated for the SuperC building (required thermal power) using the mean 𝑈-value of 7.9285 kW/K [12]. Assuming the heaters in the building returning the water constant to 25°C, this will be the inlet temperature of the BHE. The outlet temperature and flow rate of the circulation water from the BHE are simulated. Their associated thermal power in the first half year is compared with the calculated required thermal power of the building.