Browsing OSU - IGSHPA Papers by Title
Now showing items 21-40 of 126
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Design and analytical analysis of foundation pile ground heat exchanger with spiral coils
(International Ground Source Heat Pump Association, 2017)Recently, utilization of building foundation piles as the ground heat exchanger (GHE) received more and more attention since it can reduce the initial cost and land area requirement compared with the borehole GHE. This ... -
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 ... -
Development of a topology optimization method for the design of ground heat exchangers
(International Ground Source Heat Pump Association, 2022)A new method for sizing vertical ground heat exchangers is proposed using topology optimization to reduce the number of boreholes required to fulfill the cooling and heating demand. The ASHRAE sizing equation is adapted ... -
Development of a web-based screening tool for ground source heat pump applications
(International Ground Source Heat Pump Association, 2022)Ground source heat pump (GSHP) technology has great potential to help the nation meet its energy and decarbonization goals, but several barriers hinder the wide application of GSHP. Important barriers include the lack of ... -
Development of polyolefin compound and post-polymerization treatments for ground heat exchangers
(International Ground Source Heat Pump Association, 2017)A ground source heat pump (GSHP) system can be used for both cooling and heating modes simultaneously for commercial, industrial and residential buildings virtually at any location with great flexibility to cover a wide ... -
Development of TPRT (Thermal Performance-Response Test) for borehole heat exchanger design
(International Ground Source Heat Pump Association, 2017)To obtain the effective thermal conductivity and borehole thermal resistance required to design borehole heat exchangers (BHEs), thermal response tests (TRTs) are usually conducted. Although many advanced TRT methods have ... -
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 ... -
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 ...