TY - GEN
T1 - Recent experiences calculating g-functions for use in simulation of ground heat exchangers
AU - Spitler, Jeffrey
AU - Cook, Jack
AU - Liu, Xiaobing
N1 - Publisher Copyright:
© 2020 Geothermal Resources Council. All rights reserved.
PY - 2020
Y1 - 2020
N2 - Temperature response functions, known as g-functions, are a computationally efficient method for simulating ground heat exchangers (GHEs), used with ground-source heat pump (GSHP) systems, either as part of a whole-building energy simulation or as part of a dedicated ground heat exchanger design tool. In fact, at present, they are the only feasible way to simulate a ground-source heat pump system in a whole-building energy simulation. This paper summarizes recent developments in the field and recent experience using a new open-source g-function calculation tool known as pygfunction. This experience includes accuracy, computation time, memory requirements and sensitivity to boundary conditions. With larger ground heat exchangers, e.g. in excess of 100 boreholes, the computational time and memory requirements can create challenges.
AB - Temperature response functions, known as g-functions, are a computationally efficient method for simulating ground heat exchangers (GHEs), used with ground-source heat pump (GSHP) systems, either as part of a whole-building energy simulation or as part of a dedicated ground heat exchanger design tool. In fact, at present, they are the only feasible way to simulate a ground-source heat pump system in a whole-building energy simulation. This paper summarizes recent developments in the field and recent experience using a new open-source g-function calculation tool known as pygfunction. This experience includes accuracy, computation time, memory requirements and sensitivity to boundary conditions. With larger ground heat exchangers, e.g. in excess of 100 boreholes, the computational time and memory requirements can create challenges.
KW - G-function
KW - Ground source heat pump
KW - Modeling
KW - Vertical bore ground heat exchanger
UR - http://www.scopus.com/inward/record.url?scp=85103447913&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85103447913
T3 - Transactions - Geothermal Resources Council
SP - 296
EP - 315
BT - Geothermal Resources Council Virtual Annual Meeting and Expo, GRC 2020
PB - Geothermal Resources Council
T2 - Geothermal Resources Council Virtual Annual Meeting and Expo: Clean, Renewable and Always On, GRC 2020
Y2 - 19 October 2020 through 23 October 2020
ER -