Browsing OSU - IGSHPA Papers by Title
Now showing items 31-50 of 126
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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 ... -
Dynamic simulation of ground source heat pump systems with nonstationary convolutions
(International Ground Source Heat Pump Association, 2022)Advective processes related to groundwater motion and flow rates have a significant impact on the thermal performance of ground source heat pump systems. Including these elements during the design phase, however, remains ... -
Economic optimization and parametric analysis of large hybrid ground source heat pump systems: A case study
(International Ground Source Heat Pump Association, 2022)Hybrid ground source heat pump systems offer a solution to reduce initial costs and make systems more economically viable. Their design is however complex and their financial profitability difficult to establish. The design ... -
Effect of an off-peak ground pre-cool control strategy on hybrid ground-source heat pump systems
(International Ground Source Heat Pump Association, 2017)Hybrid Ground-Source Heat Pump (HGSHP) systems have been introduced as an alternate system configuration to remedy the current financial hurdles associated to the installation of geo-exchange technology. However, there ... -
Energy performance evaluation of a recycled water heat pump system in cool and dry climate zone
(International Ground Source Heat Pump Association, 2017)This paper presents performance evaluation results for a recycled water heat pump (RWHP) system, which uses the recycled water from a municipal water system as a heat sink and heat source for heat pumps. The temperature ... -
Examination of ambient temperature variations effects on predicted fluid temperatures in vertical boreholes
(International Ground Source Heat Pump Association, 2017)A fully-coupled model of geothermal bore fields is presented, taking into account the axial variations of borehole wall temperatures and heat extraction rates along the borehole lengths, fluid temperature variations inside ... -
Experimental performance analysis of a dual source heat pump integrated with thermal energy storage
(International Ground Source Heat Pump Association, 2022)To mitigate disturbances to the electric grid resulting from the growing penetration of intermittent and decentralized renewable generation, a dual-source (air source and ground source) heat pump (DSHP) integrated with ... -
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 ... -
Fast and accurate calculation of the soil temperature distribution around ground heat exchanger based on a response factor model
(International Ground Source Heat Pump Association, 2017)Ground heat exchanger (GHE) is an important component of ground coupled heat pump system (GCHP). To calculate the soil temperature around GHE accurately and fast, a refined response factor model (RF model) is proposed. It ... -
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 ... -
Field tests and numerical simulation of a novel thermal response test equipment for water wells
(International Ground Source Heat Pump Association, 2022)The objective of this study is to develop a novel thermal response test (TRT) equipment that can be applied to existing water wells instead of borehole heat exchangers (BHEs). Accordingly, field tests were conducted using ... -
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 ... -
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 ... -
Forecasting hydraulic head changes in injection wells using LSTM network
(International Ground Source Heat Pump Association, 2022)Monitoring of well's specific capacity is commonly used to plan maintenance of injection wells in open-loop GSHP and standing column well systems. However, this method does not consider the effect of temperature on hydraulic ... -
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 ... -
Fractal approach to calculate the thermal conductivity of moist soil
(International Ground Source Heat Pump Association, 2017)The ground heat exchanger (GHE) is a key component in the design of a GSHP system and the effective thermal conductivity is one of the most important parameters that determine the heat transfer underground. In this paper, ... -
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 ...