Proceedings of the IGSHPA Research Track 2018
Recent Submissions
-
2018 Research Conference Proceedings, International Ground Source Heat Pump Association
(International Ground Source Heat Pump Association, 2018) -
Dynamic modeling of flow boiling within plate heat exchangers for heat pump and refrigeration applications
(International Ground Source Heat Pump Association, 2018)Brazed Plate Heat Exchangers (BPHEs) are increasingly used as evaporators for refrigeration and heat pump applications. Detailed understanding of the underlying heat transfer phenomena is required for their effective design ... -
Hydrogeothermal characterization and modelling of a standing column well experimental installation
(International Ground Source Heat Pump Association, 2018)Standing column wells (SCW) are efficient ground heat exchangers that offer promising potential for integration in dense urban areas. Recent years have witnessed a growing interest in SCWs, resulting in the development of ... -
Performance analysis of a single underground thermal storage borehole using phase change material
(International Ground Source Heat Pump Association, 2018)Ground source heat pumps (GSHP) are used to provide both heating and cooling to a given system. These heat pumps transfer heat efficiently between the system and the ground. Despite this high efficiency, there has been a ... -
On the role of vertical ground heat flux for analytical simulation of borehole heat exchangers
(International Ground Source Heat Pump Association, 2018)Analytical modelling techniques are frequently used for prediction of the impacts of borehole heat exchangers (BHEs) on the thermal conditions in the subsurface. They are appealing because they are easy to use, compact and ... -
Carbon dioxide evaporation process in direct expansion geothermal boreholes
(International Ground Source Heat Pump Association, 2018)Ground Heat Exchangers (GHE) play an important role in the performance of Ground Source Heat Pumps (GSHP). The impact is even more significant in direct expansion GSHP (DX-GSHP) systems as the refrigerant used in the heat ... -
Parameters optimization of ground source heat pump system combined energy consumption and economic analysis using Taguchi method
(International Ground Source Heat Pump Association, 2018)In order to obtain a high performance and low cost of ground source heat pump (GSHP) system, a methodology based on Taguchi method and analysis of variance (ANOVA) is used to optimize design parameters of GSHP systems. ... -
Double source heat pump: A case study
(International Ground Source Heat Pump Association, 2018)The design of a Ground Source Heat Pump (GSHP) system is critical because design choices affect the system's energy performance and operating conditions. If the thermal load profile on the ground side is unbalanced the ... -
Comparison of two simplified approaches for ground temperature estimations in Australia
(International Ground Source Heat Pump Association, 2018)Developing an accurate and practical method for ground temperature estimations are critical for the ground source heat pump system design and energy calculation procedures. In Australia, Baggs' method is a common procedure ... -
Foundation wall heat exchanger model and validation study
(International Ground Source Heat Pump Association, 2018)Making use of foundation substructural elements as ground heat exchangers is an attractive option for larger non-residential buildings. An alternative to Energy Piles is to use wall substructures - so called diaphragm or ... -
Design and simulation tool for ground source heat pump systems considering groundwater advection
(International Ground Source Heat Pump Association, 2018)Calculation of the underground temperature resulting from heat injection/extraction into/from ground heat exchangers (GHEXs) with hourly variation is one of the most noteworthy challenges to address when simulating and ... -
Experimental setup to measure the heat-exchange processes by controlling thermal and hydraulic conditions
(International Ground Source Heat Pump Association, 2018)The design of a Borehole Heat Exchanger (BHE) is based on the evaluation of the thermal exchange capacity of the whole system constituted by the probes and the surrounding ground. The energy performance of a BHE mainly ... -
Extending the Ashrae Tp8 method for vertical borefield design to uniform BHE temperature boundary conditions
(International Ground Source Heat Pump Association, 2018)The Ashrae method is a fast algorithm for calculating the overall length of closed-loop borehole heat exchangers, considering the ground thermal response and the building thermal load profile. The method includes a corrective ... -
Impacts of injection temperature on the relevant heat transport processes in groundwater heat pump (GWHP) systems
(International Ground Source Heat Pump Association, 2018)In many hydrogeological applications, the influence of temperature on fluid density and viscosity have often been neglected. However, high contrasts in temperature which occurs in the field applications such as groundwater ... -
Virtual borehole for thermal response test unit calibration: Test facility and concept development
(International Ground Source Heat Pump Association, 2018)Precise calculation of the borehole length requires good estimation of the ground thermal conductivity. In practice, the ground thermal conductivity is measured in-situ at a specific location using what is referred to as ... -
Newton-Raphson method applied to the time-superposed ILS for parameter estimation in Thermal Response Tests
(International Ground Source Heat Pump Association, 2018)Thermal Response Testing is now a well-known and widely-used method allowing the determination of the local thermal or geometrical properties of a Borehole Heat Exchanger (BHE), those properties being critical in the design ... -
Preliminary research for eight possible groundwater energy utilisation sites in Southern Finland
(International Ground Source Heat Pump Association, 2018)Groundwater energy utilisation has not been widely regognised as a significant renewable energy source for industry in Finland. This investigation provides example of cost-effective study to map groundwater energy utilisation ... -
Are shallow boreholes a suitable option for inter-seasonal ground heat storage for the small housing sector?
(International Ground Source Heat Pump Association, 2018)In recent years, various researchers have studied the performance of Solar Assisted Ground Source Heat Pump (SAGSHP) systems using borehole heat exchangers. However, the research conducted has been limited to conventional ... -
Development of a thermal conductivity map of Stockholm
(International Ground Source Heat Pump Association, 2018)New methods have been suggested to spatially extend in situ thermal response test (TRT) assessments based on geostatistical analysis. These methods can be used to determine a stochastic distribution of the subsurface thermal ... -
Design of a laboratory borehole storage model
(International Ground Source Heat Pump Association, 2018)This paper presents the design process of a 4x4 Laboratory Borehole Storage (LABS) model through analytical and numerical analyses. This LABS is intended to generate reference Thermal Response Functions (TRFs) as well as ...