This example compares the simulation times and the accuracy of borehole wall temperature predictions of different load aggregation algorithms implemented into the :doc:`load agggregation <load_aggregation>` module.
The g-function of a single borehole is first calculated. Then, the borehole wall temperature variations are calculated using the load aggregation schemes of Bernier et al. [1], Liu [2], and Claesson and Javed [3],. The time-variation of heat extraction rates is given by the synthetic load profile of Bernier et al. [1].
The following script validates the load aggregation schemes with the exact solution obtained from convolution in the Fourier domain (see ref. [4]).
The script is located in: pygfunction/examples/comparison_load_aggregation.py
.. literalinclude:: ../../../examples/comparison_load_aggregation.py :language: python :linenos:
References
| [1] | (1, 2) Bernier, M., Pinel, P., Labib, R. and Paillot, R. (2004). A multiple load aggregation algorithm for annual hourly simulations of GCHP systems. HVAC&R Research 10 (4): 471–487. |
| [2] | Liu, X. (2005). Development and experimental validation of simulation of hydronic snow melting systems for bridges. Ph.D. Thesis. Oklahoma State University. |
| [3] | Claesson, J., & Javed, S. (2011). A load-aggregation method to calculate extraction temperatures of borehole heat exchangers. ASHRAE Transactions, 118 (1): 530–539. |
| [4] | Marcotte, D., & Pasquier, P. (2008). Fast fluid and ground temperature computation for geothermal ground-loop heat exchanger systems. Geothermics, 37 (6) : 651-665. |