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Now showing items 31-40 of 49
Seasonal performance assessment of a dual source heat pump system for heating, cooling and domestic hot water production
(International Ground Source Heat Pump Association, 2018)
In order to contribute to a global CO2 emissions reduction in 2020, the increase in the use of highly efficient heat pumps for heating, cooling and domestic hot water production in buildings is very recommendable. In this ...
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 ...
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 ...
Underground thermal energy storage in subarctic climates: A feasibility study conducted in Kuujjuaq (QC, Canada)
(International Ground Source Heat Pump Association, 2018)
Underground thermal energy storage can provide space and water heating and has been used in temperate climates so far. A step forward is to evaluate the efficiency and viability in arctic to subarctic environments, where ...
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 ...
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 ...
Thermal performance evaluation of horizontal spiral coil-type ground heat exchangers
(International Ground Source Heat Pump Association, 2018)
Geothermal energy has been widely used over the world instead of fossil fuel for environmental merits. A ground-source heat pump (GSHP) system utilizes a constant ground temperature to absorb heat during winter and to emit ...
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 ...
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 ...
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 ...