Numerical analysis of the efficiency of earth to air heat exchange systems in cold and hot-arid climates

In order to examine and compare the efficiency of earth to air heat exchanger (EAHE) systems in hot-arid (Yazd) and cold (Hamadan) climates in Iran a steady state model was developed to evaluate the impact of various parameters including inlet air temperatures, pipe lengths and ground temperatures on the cooling and heating potential of EAHEs in both climates. The results demonstrated the ability of the system to not only improve the average temperature and decrease the temperature fluctuation of the outlet air temperature of EAHE, but also to trigger considerable energy saving. It was found that in both climates, the system is highly utilized for pre-heating, and its usage is unfeasible in certain periods throughout the year. In winter, EAHEs have the potential of increasing the air temperature in the range of 0.2–11.2 °C and 0.1–17.2 °C for Yazd and Hamadan, respectively. However, in summer, the system decreases the air temperature for the aforementioned cities in the range of 1.3–11.4 °C and 5.7–11.1 °C, respectively. The system ascertains to be more efficient in the hot-arid climate of Yazd, where it can be used on 294 days of the year, leading to 50.1–63.6% energy saving, when compared to the cold climate of Hamadan, where it can be used on 225 days of the year resulting in a reduction of energy consumption by 24.5–47.9%.

[1]  Mohammed Benhammou,et al.  Parametric study on thermal performance of earth-to-air heat exchanger used for cooling of buildings , 2015 .

[2]  Fuxin Niu,et al.  Investigation of a coupled geothermal cooling system with earth tube and solar chimney , 2014 .

[3]  Ismael R. Maestre,et al.  Numerical and experimental validation of a new hybrid model for vertical ground heat exchangers , 2015 .

[4]  Anil Kumar,et al.  Energy metrics of earth–air heat exchanger system for hot and dry climatic conditions of India , 2015 .

[5]  Dennis L. Loveday,et al.  The cooling potential of earth-air heat exchangers for domestic buildings in a desert climate , 2006 .

[6]  Ahmed M. Hamed,et al.  Enhancement of gas turbine power output using earth to air heat exchanger (EAHE) cooling system , 2016 .

[7]  I. Hernández-López,et al.  Pseudo transient numerical study of an earth-to-air heat exchanger for different climates of México , 2015 .

[8]  A.K.S. Thakur,et al.  Temperature variation in upper earth crust due to periodic nature of solar insolation , 1983 .

[9]  Mahmoud Bourouis,et al.  Numerical analysis of earth air heat exchangers at operating conditions in arid climates , 2017 .

[10]  Jyotirmay Mathur,et al.  Performance evaluation and economic analysis of integrated earth–air–tunnel heat exchanger–evaporative cooling system , 2012 .

[11]  D. Y. Goswami,et al.  Heat transfer analysis in environmental control using an underground air tunnel , 1985 .

[12]  Jyotirmay Mathur,et al.  CFD analysis based parametric study of derating factor for Earth Air Tunnel Heat Exchanger , 2013 .

[13]  Carlo Roselli,et al.  Microcogeneration in buildings with low energy demand in load sharing application , 2015 .

[14]  S. C. Kaushik,et al.  Performance evaluation and energy conservation potential of earth–air–tunnel system coupled with non-air-conditioned building , 2003 .

[15]  B. Draoui,et al.  Performance analysis of an earth-to-air heat exchanger assisted by a wind tower for passive cooling of buildings in arid and hot climate , 2015 .

[16]  Fuxin Niu,et al.  Heat and mass transfer performance analysis and cooling capacity prediction of earth to air heat exchanger , 2015 .

[17]  Farouk Fardoun,et al.  Hybrid cooling systems: A review and an optimized selection scheme , 2016 .

[18]  T. Tavousi,et al.  Assessment of bioclimatic comfort conditions based on Physiologically Equivalent Temperature (PET) using the RayMan Model in Iran , 2013 .

[19]  Joaquim Vaz,et al.  Numerical investigation about the improvement of the thermal potential of an Earth-Air Heat Exchanger (EAHE) employing the Constructal Design method , 2015 .

[20]  Mehdi Shokouhian,et al.  Socio-environmental sustainability in traditional courtyard houses of Iran and China , 2017 .

[21]  Guohui Gan,et al.  Simulation of dynamic interactions of the earth–air heat exchanger with soil and atmosphere for preheating of ventilation air , 2015 .

[22]  Mark Gillott,et al.  A novel low-carbon space conditioning system incorporating phase-change materials and earth–air heat exchangers , 2015 .

[23]  Mohammad Hossein Abbaspour-Fard,et al.  Evaluation of an Earth-to-Air Heat Exchanger for the North-East of Iran with Semi-Arid Climate , 2011 .

[24]  Sanjeev Jakhar,et al.  Thermal performance investigation of earth air tunnel heat exchanger coupled with a solar air heating duct for northwestern India , 2015 .

[25]  Shahram Delfani,et al.  Exergy analysis of evaporative cooling to select the optimum system in diverse climates , 2012 .

[26]  Etienne Wurtz,et al.  Modelling earth-to-air heat exchanger behaviour with the convolutive response factors method , 2009 .

[27]  Moncef Krarti,et al.  ANALYTICAL MODEL FOR HEAT TRANSFER IN AN UNDERGROUND AIR TUNNEL , 1996 .

[28]  Ahmed A. Serageldin,et al.  Earth-Air Heat Exchanger thermal performance in Egyptian conditions: Experimental results, mathematical model, and Computational Fluid Dynamics simulation , 2016 .

[29]  Brahim Benhamou,et al.  Experimental and numerical study of an earth-to-air heat exchanger for air cooling in a residential building in hot semi-arid climate , 2016 .

[30]  Arnold Janssens,et al.  Passive cooling in a low-energy office building , 2005 .

[31]  Ra Rizki Mangkuto,et al.  Heating and cooling energy demand in underground buildings: potential for saving in various climates and functions , 2014 .

[32]  Behrouz Mohammad Kari,et al.  Cooling load reduction in office buildings of hot-arid climate, combining phase change materials and night purge ventilation , 2016 .

[33]  D. N. Asimakopoulos,et al.  Modelling the thermal performance of earth-to-air heat exchangers , 1994 .

[34]  Viorel Badescu,et al.  Pneumatic and thermal design procedure and analysis of earth-to-air heat exchangers of registry type , 2011 .

[35]  Jyotirmay Mathur,et al.  Performance analysis of integrated earth–air-tunnel-evaporative cooling system in hot and dry climate , 2012 .

[36]  Ali Mostafaeipour,et al.  Energy saving evaluation of passive systems for residential buildings in hot and dry regions , 2017 .

[37]  Shengwei Wang,et al.  Modelling and evaluation of cooling capacity of earth-air-pipe systems , 2007 .

[38]  G. N. Tiwari,et al.  Performance evaluation and life cycle cost analysis of earth to air heat exchanger integrated with adobe building for New Delhi composite climate , 2009 .

[39]  Olfa Kanoun,et al.  Investigation of the ground thermal potential in tunisia focused towards heating and cooling applications , 2010 .

[40]  R. Ralegaonkar,et al.  Design and Development of Geothermal Cooling System for Composite Climatic Zone in India , 2014 .

[41]  Mehdi Maerefat,et al.  Passive cooling of buildings by using integrated earth to air heat exchanger and solar chimney , 2010 .

[42]  T. Kusuda,et al.  EARTH TEMPERATURE AND THERMAL DIFFUSIVITY AT SELECTED STATIONS IN THE UNITED STATES , 1965 .

[43]  Jeff Haberl,et al.  Potential cooling savings from a ground-coupled return-air duct system for residential buildings in hot and humid climates , 2015 .

[44]  Michele De Carli,et al.  The design and environmental evaluation of earth-to-air heat exchangers (EAHE). A literature review , 2013 .

[45]  Onder Ozgener,et al.  Determining the optimal design of a closed loop earth to air heat exchanger for greenhouse heating b , 2011 .

[46]  Mehdi Shokouhian,et al.  The impact of courtyard design variants on shading performance in hot- arid climates of Iran , 2017 .

[47]  Jianing Zhao,et al.  Emergy-based sustainability assessment of different energy options for green buildings , 2015 .

[48]  Mohammad. Rasul,et al.  Parametric study on thermal performance of horizontal earth pipe cooling system in summer , 2016 .

[49]  Jyotirmay Mathur,et al.  CFD analysis of EATHE system under transient conditions for intermittent operation , 2015 .

[50]  B. Rudolf,et al.  World Map of the Köppen-Geiger climate classification updated , 2006 .