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  • Parameters optimization of ground source heat pump system combined energy consumption and economic analysis using Taguchi method 

    Xie, Yiwei; Hu, Pingfang; Lei, Fei; Zhu, Na; Xing, Lu (International Ground Source Heat Pump Association, 2018)
    In order to obtain a high performance and low cost of ground source heat pump (GSHP) system, a methodology based on Taguchi method and analysis of variance (ANOVA) is used to optimize design parameters of GSHP systems. ...
  • Design and simulation tool for ground source heat pump systems considering groundwater advection 

    Shoji, Yutaka; Katsura, Takao; Higashitani, Takashi; Nagano, Katsunori; Sakata, Yoshitaka (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 ...
  • Extending the Ashrae Tp8 method for vertical borefield design to uniform BHE temperature boundary conditions 

    Rolando, Davide; Fossa, Marco; Priarone, Antonella (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 ...
  • Experimental setup to measure the heat-exchange processes by controlling thermal and hydraulic conditions 

    Scotton, Paolo; Teza, Giordano; Rossi, Daniele; Dalla Santa, Giorgia; Galgaro, Antonio (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 ...
  • Carbon dioxide evaporation process in direct expansion geothermal boreholes 

    Badache, Messaoud; Eslami, Parham; Bastani, Nejad Arash; Aidoun, Zine; Ouzzane, Mohamed (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 ...
  • Double source heat pump: A case study 

    Zarrella, Angelo; Zecchin, Roberto; Pasquier, Philippe; Guzzon, Diego; Ciantia, Michael; De Carli, Michele; Emmi, Giuseppe (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 ...
  • Comparison of two simplified approaches for ground temperature estimations in Australia 

    Xing, Lu; Mao, Cuncun; Yu, Zhou; Mikhaylova, Olga; Hu, Pingfang (International Ground Source Heat Pump Association, 2018)
    Developing an accurate and practical method for ground temperature estimations are critical for the ground source heat pump system design and energy calculation procedures. In Australia, Baggs' method is a common procedure ...
  • Impacts of injection temperature on the relevant heat transport processes in groundwater heat pump (GWHP) systems 

    Park, Byeong-Hak; Lee, Kang-Kun (International Ground Source Heat Pump Association, 2018)
    In many hydrogeological applications, the influence of temperature on fluid density and viscosity have often been neglected. However, high contrasts in temperature which occurs in the field applications such as groundwater ...
  • Ates system monitoring project, first measurement and performance evaluation: Case study in Sweden 

    Abuasbeh, Mohammad; Acuna, Jose (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 ...
  • Full-scale model to predict borehole fluid temperature with groundwater advection 

    Cui, Tengfei; Cai, Shanshan; Guo, Haijin; Huang, Ting (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 ...
  • Randomly fractal approach to calculate the thermal conductivity of moist soil 

    Cai, Shanshan; Zhang, Boxiong; Cui, Tengfei; Guo, Haijin; Huang, Ting (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 ...
  • Hybrid model for generating short-time g-functions 

    Brussieux, Yves; Bernier, Michel (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 ...
  • Upgrade of the B2G dynamic geothermal heat exchanger model: Optimal location of the ground nodes 

    Cazorla-Marin, Antonio; Montagud, Carla; Corberan, Jose Miguel; Tinti, Francesco; Focaccia, Sara (International Ground Source Heat Pump Association, 2018)
    In order to optimize the design and operation of a ground source heat pump system, the modeling of the Borehole Heat Exchanger (BHE) and its coupling to the heat pump operation becomes crucial. This becomes key for those ...
  • Near-instant g-function construction with artificial neural networks 

    Dusseault, Bernard; Pasquier, Philippe (International Ground Source Heat Pump Association, 2018)
    A g-function is a useful tool that simplifies the calculations of heat exchanges in a ground-coupled heat pump system. In this work, we show how an artificial neural network can be trained to construct a g-function with ...
  • G-functions for bore fields with mixed parallel and series connections considering axial fluid temperature variations 

    Cimmino, Massimo (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 ...
  • Design of a laboratory borehole storage model 

    Mazzotti, Willem; Jiang, Yifeng; Monzo, Patricia; Lazzarotto, Alberto; Acuna, Jose; Palm, Bjorn (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 ...
  • Newton-Raphson method applied to the time-superposed ILS for parameter estimation in Thermal Response Tests 

    Mazzotti, Willem; Firmansyah, Husni; Acuna, Jose; Stokuca, Milan; Palm, Bjorn (International Ground Source Heat Pump Association, 2018)
    Thermal Response Testing is now a well-known and widely-used method allowing the determination of the local thermal or geometrical properties of a Borehole Heat Exchanger (BHE), those properties being critical in the design ...
  • Virtual borehole for thermal response test unit calibration: Test facility and concept development 

    Nejad, Parham Eslami; Badache, Messaoud; Corcoran, Alexia; Bernier, Michel (International Ground Source Heat Pump Association, 2018)
    Precise calculation of the borehole length requires good estimation of the ground thermal conductivity. In practice, the ground thermal conductivity is measured in-situ at a specific location using what is referred to as ...
  • High temperature borehole thermal energy storage - A case study 

    Malmberg, Malin; Mazzotti, Willem; Acuna, Jose; Lindstahl, Henrik; Lazzarotto, Alberto (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 ...
  • Are shallow boreholes a suitable option for inter-seasonal ground heat storage for the small housing sector? 

    Naranjo-Mendoza, Carlos; Greenough, Richard M.; Wright, Andrew J. (International Ground Source Heat Pump Association, 2018)
    In recent years, various researchers have studied the performance of Solar Assisted Ground Source Heat Pump (SAGSHP) systems using borehole heat exchangers. However, the research conducted has been limited to conventional ...

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