Now showing items 1-20 of 49

    • Hydrogeothermal characterization and modelling of a standing column well experimental installation 

      Beaudry, Gabrielle; Pasquier, Philippe; Marcotte, Denis (International Ground Source Heat Pump Association, 2018)
      Standing column wells (SCW) are efficient ground heat exchangers that offer promising potential for integration in dense urban areas. Recent years have witnessed a growing interest in SCWs, resulting in the development of ...
    • Dynamic modeling of flow boiling within plate heat exchangers for heat pump and refrigeration applications 

      Boese, Lennart; Opferkuch, Frank; Becker, Julian; Wensing, Michael (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 ...
    • Performance analysis of a single underground thermal storage borehole using phase change material 

      Bayomy, A. M.; Nguyen, Hiep V.; Wang, Jun; Dworkin, Seth B. (International Ground Source Heat Pump Association, 2018)
      Ground source heat pumps (GSHP) are used to provide both heating and cooling to a given system. These heat pumps transfer heat efficiently between the system and the ground. Despite this high efficiency, there has been a ...
    • 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 ...
    • Foundation wall heat exchanger model and validation study 

      Shafagh, Ida; Rees, Simon J. (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 ...
    • On the role of vertical ground heat flux for analytical simulation of borehole heat exchangers 

      Bayer, Peter; Rivera, Jaime A.; Blum, Philipp (International Ground Source Heat Pump Association, 2018)
      Analytical modelling techniques are frequently used for prediction of the impacts of borehole heat exchangers (BHEs) on the thermal conditions in the subsurface. They are appealing because they are easy to use, compact and ...
    • 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 ...
    • 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 ...
    • Thermal analysis models of deep borehole heat exchangers 

      Fang, Liang; Diao, Nairen; Shao, Zhukun; Cui, Ping; Zhu, Ke; Fang, Zhaohong (International Ground Source Heat Pump Association, 2018)
      With the advantages of much less land demand and higher temperature available, the deep borehole heat exchanger (DBHE) gets down to a depth of 1000-3000 m below the ground surface, and provides a new variance of ground-coupled ...
    • 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 ...
    • Seasonal performance assessment of a dual source heat pump system for heating, cooling and domestic hot water production 

      Cazorla-Marin, Antonio; Montagud, Carla; Corberan, Jose Miguel; Marchante-Avellaneda, Javier (International Ground Source Heat Pump Association, 2018)
      In order to contribute to a global CO2 emissions reduction in 2020, the increase in the use of highly efficient heat pumps for heating, cooling and domestic hot water production in buildings is very recommendable. In this ...
    • 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 ...