ArticleAn underground pipe system as an energy source for cooling/heating purposes
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Cited by (40)
Advances in standalone and hybrid earth-air heat exchanger (EAHE) systems for buildings: A review
2021, Energy and BuildingsCitation Excerpt :Depending on the climate under consideration, the design of EAHE can be done in terms of seasonal or daily operation, which implies a differentiated set-up [9]. Several applications of this technology can be found, namely in residential buildings [10–17,18], guest houses [19], eco-resort houses [20,21], passive houses [22–24] and near zero energy buildings (NZEB) [25,26], schools [16,27], college [28] and university buildings [29,30], libraries [31], hospitals [32,33], gymnasiums [34], cafeteria buildings [35], office [36–41,42] and commercial buildings [43], welfare institutes [44], as well as in farmhouses [45], livestock houses [46–48], and greenhouses [49–72]. Some studies have also been conducted to assess the feasibility of EAHE for industrial applications, such as: precooling of air for air cooled condensers and air compressors [6]; dry-cooling thermal power plants [73]; super-critical Rankine cycle based power generation units with an EAHE for condenser cooling [74,75]; gas turbine power plants enhanced with EAHE cooling [76,77]; underground diesel generator rooms cooled with EAHE [78], etc.
Validation of modified one-dimensional models simulating the thermal behavior of earth-to-air heat exchangers—Comparative analysis of modelling and experimental results
2019, GeothermicsCitation Excerpt :During the last two decades a lot of studies have been published on analytical and numerical analysis of EAHEs and nowadays many models are available for the simulation of their thermal behavior. The first numerical models calculated the pipe air outlet temperature in relation to pipe air inlet and ground temperatures, by using steady-state one-dimensional heat transfer equations (De Paepe and Janssens, 2003; Lee and Strand, 2008; Jacovides and Mihalakakou, 1995; Benkert et al., 1997; Ghosal et al., 2005; Cucumo et al., 2008; Freire et al., 2013). Two-dimensional models appeared during the 1990′s and allow calculation of ground temperatures at different depths, by using the finite-element method to solve two-dimensional conduction equations (Badescu, 2007).
Frost front research of a cold-region tunnel considering ventilation based on a physical model test
2018, Tunnelling and Underground Space TechnologyCitation Excerpt :Based on temperature boundary conditions along the axial direction of pipeline, Shamsundar (1982) proposed the analytical solution of outside temperature field of the circular pipe. Jacovides and Mihalakakou (1995) performed the analysis of temperature field of buried pipes. Combining with the plate freezing theory and single pipe freezing theory, Cai (2009) analyzed the extended thickness of frozen wall under the condition of intersectional freezing multi tubes.
Tunnel temperature fields analysis under the couple effect of convection-conduction in cold regions
2017, Applied Thermal Engineering