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Now showing items 11-20 of 35
Analytical solution for optimal mass flow rate in primary circuit of ground-coupled heat pump systems
(International Ground Source Heat Pump Association, 2017)
Ground source heat pump (GSHP) systems extract heat or cold from the ground by circulating a heat carrier uid (HCF) in a ground heat exchanger and inject this energy in buildings. This paper shows that there exists an ...
Vertical GSHP systems in Sweden 1978-2015 - A survey based on the Swedish Well Database
(International Ground Source Heat Pump Association, 2017)
The Geological Survey of Sweden (SGU) is the Swedish government agency responsible for groundwater, geological and mineral management in Sweden. SGU provides open access geological data on rock, soil and groundwater ...
First measurements of a monitoring project on a BTES system
(International Ground Source Heat Pump Association, 2017)
Performance of Borehole Thermal Energy Storage (BTES) systems depends on the temperature of the secondary fluid, circulating through the ground-loop heat exchangers. Borehole systems are therefore designed in order to ...
Investigation on the effects of different time resolutions in the design and simulation of BHE fields
(International Ground Source Heat Pump Association, 2017)
The correct design of a field of Borehole Heat Exch angers (BHE) requires the knowledge of ground thermal properties, heat pump performance and building heating and cooling demand. The sequence o f heat pulses from (to) ...
Direct expansion ground source heat pump using carbon dioxide as refrigerant: Test facility and theoretical model presentation
(International Ground Source Heat Pump Association, 2017)
In an attempt to address recent challenges on using natural refrigerants and to develop further knowledge and expertise in the field of direct expansion ground source heat pump (DX-GSHP), an experimental transcritical ...
Properties of different ethyl alcohol based secondary fluids used for GSHP in Europe and USA
(International Ground Source Heat Pump Association, 2017)
The extensive use of ground source heat pumps (GSHP) for heating and cooling purposes has made Sweden the European leader in geothermal energy utilization, in terms of the installed capacity, as well as extracted thermal ...
Modelling of alternative borehole configurations for geo-exchange
(International Ground Source Heat Pump Association, 2017)
During the operation of a ground source heat pump (GSHP), the ground acts as a heat sink and heat source in cooling and heating modes, respectively. When the heating and cooling loads are extremely unbalanced, ground ...
Three dimensional numerical simulation of double-U pile heat exchangers
(International Ground Source Heat Pump Association, 2017)
The Ground Source Heat Pump system with pile heat exchangers has been used in engineering in recent years. In this paper, a three-dimensional numerical model of double-U pile heat exchangers is established which was verified ...
Investigation of thermo-hydro-geochemical processes in a standing column well intersected by a fracture
(International Ground Source Heat Pump Association, 2017)
Local thermal and chemical conditions may favor minerals' scaling which can cause undesirable operational problems to standing column well systems. Precipitation may reduce heat exchange in the well and the heat exchanger ...
Can ground source heat pumps perform well in Alaska?
(International Ground Source Heat Pump Association, 2017)
The long heating season and cold soils of Alaska provide a harsh testing ground for ground source heat pumps (GSHPs), even those designed and marketed for colder climates. Fairbanks, Alaska has 7,509°C heating degree-days18 ...