A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of borehole short-time-step performance on long-term dynamic simulation of ground-source heat pump system
https://orcid.org/0000-0002-5950-6714
Highlights Effect of borehole short-time-step approach on long-term system simulation studied. An office zone was analysed for use in Hong Kong over a simulation time of 10 years. The influence of ground and grout thermal conductivities was investigated. The more appropriate shot-time-step approach led to lower initial and running cost. Short-time-step approach should be employed in long-term dynamic system simulation.
Abstract Despite many studies that were found in the literature regarding the modelling of the short-time-step (STS) behaviour of the borehole ground heat exchangers, reported investigations of its effect on the long-term dynamic simulation of a ground-source heat pump (GSHP) system were sparse. Hence, in this study, the dynamic performances of a GSHP system applied to an office zone in Hong Kong over a period of 10 years were compared with both the long-time-step (LTS) and STS approaches for the boreholes. It was found that with the adoption of the more appropriate STS approach, the simulated fluid temperature leaving the ground heat exchanger borefield was lower by at most 1.62°C over a range of ground and grout thermal conductivities investigated. This also allowed the design borehole length to be reduced by at most 14.4% while the resulting energy consumption was still better than those based on the LTS approach. In this regard, the STS approach should be employed in the long-term dynamic simulation of GSHP systems.
Effect of borehole short-time-step performance on long-term dynamic simulation of ground-source heat pump system
https://orcid.org/0000-0002-5950-6714
Highlights Effect of borehole short-time-step approach on long-term system simulation studied. An office zone was analysed for use in Hong Kong over a simulation time of 10 years. The influence of ground and grout thermal conductivities was investigated. The more appropriate shot-time-step approach led to lower initial and running cost. Short-time-step approach should be employed in long-term dynamic system simulation.
Abstract Despite many studies that were found in the literature regarding the modelling of the short-time-step (STS) behaviour of the borehole ground heat exchangers, reported investigations of its effect on the long-term dynamic simulation of a ground-source heat pump (GSHP) system were sparse. Hence, in this study, the dynamic performances of a GSHP system applied to an office zone in Hong Kong over a period of 10 years were compared with both the long-time-step (LTS) and STS approaches for the boreholes. It was found that with the adoption of the more appropriate STS approach, the simulated fluid temperature leaving the ground heat exchanger borefield was lower by at most 1.62°C over a range of ground and grout thermal conductivities investigated. This also allowed the design borehole length to be reduced by at most 14.4% while the resulting energy consumption was still better than those based on the LTS approach. In this regard, the STS approach should be employed in the long-term dynamic simulation of GSHP systems.
Effect of borehole short-time-step performance on long-term dynamic simulation of ground-source heat pump system
https://orcid.org/0000-0002-5950-6714
Highlights Effect of borehole short-time-step approach on long-term system simulation studied. An office zone was analysed for use in Hong Kong over a simulation time of 10 years. The influence of ground and grout thermal conductivities was investigated. The more appropriate shot-time-step approach led to lower initial and running cost. Short-time-step approach should be employed in long-term dynamic system simulation.
Abstract Despite many studies that were found in the literature regarding the modelling of the short-time-step (STS) behaviour of the borehole ground heat exchangers, reported investigations of its effect on the long-term dynamic simulation of a ground-source heat pump (GSHP) system were sparse. Hence, in this study, the dynamic performances of a GSHP system applied to an office zone in Hong Kong over a period of 10 years were compared with both the long-time-step (LTS) and STS approaches for the boreholes. It was found that with the adoption of the more appropriate STS approach, the simulated fluid temperature leaving the ground heat exchanger borefield was lower by at most 1.62°C over a range of ground and grout thermal conductivities investigated. This also allowed the design borehole length to be reduced by at most 14.4% while the resulting energy consumption was still better than those based on the LTS approach. In this regard, the STS approach should be employed in the long-term dynamic simulation of GSHP systems.
Effect of borehole short-time-step performance on long-term dynamic simulation of ground-source heat pump system
Lee, C.K. (author)
Energy and Buildings ; 129 ; 238-246
2016-08-02
9 pages
Article (Journal)
Electronic Resource
English
Long-Term Monitoring of the Effectiveness of a Ground Source Heat Pump Borehole
| British Library Conference Proceedings | 2014
The influence of the borehole short-time response on ground source heat pump system efficiency
| Online Contents | 2011