Search
Now showing items 111-120 of 126
Numerical simulation of slinky-coil ground heat exchangers installed in railway tunnels
(International Ground Source Heat Pump Association, 2018)
The use of horizontal ground heat exchangers (HGHEs) greatly reduces the initial cost of GSHP systems in comparison with vertical GHEs. Though the HGHEs are commonly used in North American countries, the installation number ...
Hybrid model for generating short-time g-functions
(International Ground Source Heat Pump Association, 2018)
A hybrid numerical/analytical approach is proposed to predict short-time g-functions. Transient heat transfer in the borehole is solved numerically while ground heat transfer is evaluated analytically using the infinite ...
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 ...
Vertical hydraulic conductivity of borehole heat exchanger systems before and after freeze-thaw cycle stress
(International Ground Source Heat Pump Association, 2018)
Quality assurance is a very important aspect in the planning, implementation and operation of borehole heat exchangers (BHE). Within the research project Quality Assurance for Borehole Heat Exchangers (QEWS) the hydraulic ...
Randomly fractal approach to calculate the thermal conductivity of moist soil
(International Ground Source Heat Pump Association, 2018)
Ground coupled heat pump (GCHP) is an energy saving technology that uses the shallow geothermal energy for the building heating and refrigeration systems. An optimized design of ground heat exchangers (GHEs) is the key to ...
High temperature borehole thermal energy storage - A case study
(International Ground Source Heat Pump Association, 2018)
Combining High-Temperature Borehole Thermal Energy Storages (HT-BTES) with existing Combined Heat and Power (CHP) systems running on waste fuels seems to be a promising approach to increase the energy efficiency of district ...
Control strategy evaluation framework for ground source heat pumps using standing column wells
(International Ground Source Heat Pump Association, 2022)
Standing column wells (SCWs) are efficient ground heat exchangers (GHEs) that have a significant cost saving potential. Recent developments have shown that they can also adapt successfully to cold climates despite previous ...
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 ...
Improving thermal conductivity and fluid loss properties of grouting materials: New mixed grout granules of bentonites and sands
(International Ground Source Heat Pump Association, 2017)
We propose new granule type grouting materials with optimized ratio of bentonites and sands for use in the ground source heat pump systems. The grouting materials could be prepared in various size of 1.18 to 4.75 mm. The ...
2022 Research Conference Proceedings, International Ground Source Heat Pump Association
(International Ground Source Heat Pump Association, 2022)