Browsing Proceedings of the IGSHPA Research Track 2018 by Title
Now showing items 1-20 of 49
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2018 Research Conference Proceedings, International Ground Source Heat Pump Association
(International Ground Source Heat Pump Association, 2018) -
Application of matched asymptotic expansion techniques to the analysis of geothermal heat exchangers
(International Ground Source Heat Pump Association, 2018)Most theoretical models for the thermal response of geothermal heat exchangers assume the mean azimuthal borehole wall temperature to be uniform along the boreholes. This simplifying assumption, closely related to the ... -
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 ... -
Ates system monitoring project, first measurement and performance evaluation: Case study in Sweden
(International Ground Source Heat Pump Association, 2018)Performance of Aquifer Thermal Energy Storage (ATES) systems for seasonal thermal storage depends on the temperature of the extracted/injected groundwater, water pumping rates and the hydrogeological conditions of the ... -
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 ... -
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 ... -
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 ... -
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 ... -
Development and verification of control system for heat recovery ground source heat pump system
(International Ground Source Heat Pump Association, 2018)An operation method and control system for heat recovery ground source heat pump (HR-GSHP) systems have been developed. By applying the operation method and control system, the heating and cooling output from the respective ... -
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 ... -
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 ... -
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 ... -
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 ... -
Field performance of a district central ground source heat pump system in the US
(International Ground Source Heat Pump Association, 2018)This case study discusses the field performance of a district central ground source heat pump (GSHP) system installed at Ball State University (BSU) in Muncie, IN., USA. This district GSHP system replaces the existing ... -
Financial assessment of ground source heat pump systems against other selected heating and cooling systems for Australian conditions
(International Ground Source Heat Pump Association, 2018)Ground source heat pump (GSHP) systems can provide cost-effective space heating and cooling for buildings while using less fossil fuel compared to many conventional systems. Despite these benefits, they typically have ... -
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 ... -
Full-scale model to predict borehole fluid temperature with groundwater advection
(International Ground Source Heat Pump Association, 2018)Ground source heat pump (GSHP) system is one of the major techniques that utilize shallow geothermal energy and borehole heat exchangers (BHEs) is the key component in GSHP system. Although most proposed analytical models ... -
G-functions for bore fields with mixed parallel and series connections considering axial fluid temperature variations
(International Ground Source Heat Pump Association, 2018)A semi-analytical method based on the finite line source (FLS) solution is presented to evaluate thermal response factors for geothermal bore fields with mixed series and parallel connections between boreholes. Each borehole ... -
Geothermal storage integration into supermarket's CO2 refrigeration system
(International Ground Source Heat Pump Association, 2018)This paper investigates the integration of geothermal storage into the state-of-the-art CO2 trans-critical booster systems. The objective is to evaluate the impact on energy efficiency of this integration. Three scenarios ...