Open Access Open Access  Restricted Access Subscription or Fee Access

Software Numerical Simulation on Earth Tube Heat Exchanger Where Air as A Flow Medium

Md Asif, Dharmendra Singh Rathore


Renewable energy is free in nature and it must be brought into application. Due to use of air conditioning and its refrigerants global warming is a serious issue. Renewable energy is the main concept of an earth tube heat exchanger, which uses the thermal energy of the ground for cooling and heating of the fluid medium. Here, air is used as fluent working medium. The air cools in summer and gets heated in winter due to the temperature difference between the air and underground surface temperature. However, for the study of the surface heat convection study of model is carried out. Researchers have been carried out at beginning as a field investigation. But presently software simulation is used for measurement of heat transfer and temperature difference at the outlet and inlet. The software requires complex model and its dimensioning process, such a system which involves optimization of numerous parameters such as the diameter, air flow rate depth, tube length and condensation in the meantime have to be considered. ANSYS Software is being used for simulation and modeling of result. Computational fluid dynamics (CFD fluent) workbench under ANSYS software is used as simulation analysis the pipe of 45 m length, 0.004 m thickness, 0.08 m diameter and 5 m depth of pipe from the earth ground. Air velocity is considered to be 2 m/s. The inlet temperature is considered for a day of every month in a year according the previous research. Using fluent thermal variations is being analyzed. It is observed at increasing velocity increases the rate of heat transfer, mid temperature, outlet temperature vary in the year.


EATHE (earth tube heat exchanger), heat convection, numerical simulation, temperature, renewable energy

Full Text:



Jakhar S, Soni MS, Gakkhar N. Performance analysis of earth water heat exchanger for concentrating photovoltaic cooling. Energy Procedia. 2016 Dec 1; 90:145–53.

Grosso M, Chiesa G. Horizontal earth-to-air heat exchanger in Imola, Italy. A 30-month-long monitoring campaign. Energy Procedia. 2015 Nov 1; 78: 73–8.

Carlini M, Allegrini E, Castellucci S. Numerical simulation of a down-hole heat exchanger: an application to a case study in central Italy. Energy Procedia. 2016 Nov 1; 101: 512–9.

Man Y, Yang H, Qu Y, Fang Z. Feasibility investigation of the low energy consumption cooling mode with ground heat exchanger and terminal radiator. Procedia Engineering. 2015 Jan 1; 121:423–9.

Athienitis AK, Roy M, Zhao M. Design and simulation of a hybrid ventilation system with earth-air heat exchanger. Ninth International IBPSA Conference, Building Simulation 2005, Montreal, Canada, 1, 27–32, Aug. 15 2005 Aug 15 Vol. 18, p. 2005.

Al-Ajmi F, Loveday DL, Hanby VI. The cooling potential of earth–air heat exchangers for domestic buildings in a desert climate. Building and Environment. 2006 Mar 1;41(3):235–44.

Tudor A, Badescu V. The influence of several parameters on the performance of earth to air heat exchangers in South-Eastern European climates. UPB Sci Bull. 2013;75(3):85–96p.

Algerian National Weather Office.

Capozza A, Zarrella A, De Carli M. Analysis of vertical ground heat exchangers: the new CaRM tool. Energy Procedia. 2015 Dec 1;81:288–97.

Argiriuou A. Ground cooling. In: Santamouris M, Asimakopoulos D, editors. Passive cooling of buildings. London: James and James; 2001. p. 360e401.

Ashish Ku Chaturvedi and DR. V.N. Bartaria: Performance of Earth Tube Heat Exchanger Cooling of Air, (IJSPR) Volume 06, Number 02, 2014

Badescu V. Simple and accurate model for the ground heat exchanger of a passive house. Renew Energy. 2007; 32: 845e55.

Bansal V, Mishra R, Agarwal GD, Mathur J. Performance analysis of integrated earthe air-tunnel-evaporative cooling system in hot and dry climate. Energy Build. 2012; 47:525e32.

Bansal V, Misra R, Agrawal GD, Mathur J. Performance analysis of earthepipee air heat exchanger for winter heating. Energy Build. 2009; 41:1151e4.

Bansal V, Misra R, Das Agarwal G, Mathur J. ‘Derating Factor’ new concept for evaluating thermal performance of earth air tunnel heat exchanger: a transient CFD analysis. Appl Energy. 2013; 102:418e26.

Ben Jmaa Derbel H, Kanoun O. Investigation of the ground thermal potential in Tunisia focused towards heating and cooling applications. Appl Therm Eng. 2010; 30: 1091e100.

Benkert S, Heidt FD, Scholer D. Calculation tool for earth heat exchangers GAEA. In: Proceeding of building simulation, vol. 2; 1997. Prague: Fifth International IBPSA Conference.

Bisnoiya T.S., Kumar A., Baredar P, Energy metrics of earth-air heat exchanger system for dry and hot climatic conditions in India, Energy and Buildings 86, 2015, 214–221.

Bisoniya TS, Kumar A, Baredar P. Energy metrics of earth air heat exchanger system for hot and dry climatic conditions of India. Energy Build 2015;86:214e21.

Clara Peretti, Angelo Zarrella, Michele De Carli, Roberto Zecchin: The design and environmental evaluation of earth-to-air heat exchangers (EAHE). Renewable and Sustainable Energy Reviews. 28 (2013) 107–116

De Paepe M, Janssens A. Thermo-hydraulic design of earth air heat exchanger. Energy Build 2003;35:389e97.

Deglin D., Caenegem L.V., Dehon P. Subsoil heat exchanger for air conditioning of livestock buildings, Journal of Agricultural Engineering 73, 1999, 179–188.

Abdelkrim. Sehli, Abdelhafid. Hasni,

Mohammed. Tamali. The potential of earth-air heat exchangers for low energy cooling of buildings in South Algeria. Energy Procedia. 18 (2012) 496–506 1876–6102 2012. doi: 10.1016/j.egypro.2012.05.061

F. Al-Ajmi, D. L. Loveday and V. I. Hanby, The cooling potential of earth–air heat exchangers for domestic buildings in a desert climate, Building and Environment 41, 2006, 235–244.

Fabrizio Ascione, Laura Bellia, Francesco Minichiello: Earth-to-air heat exchangers for Italian climates, Renewable Energy 36 (2011) 2177–2188

Fuxin Niu, Yuebin Yu, Daihong Yu, Haorong Li : Heat and mass transfer performance analysis and cooling capacity prediction of earth to air heat exchanger, Applied Energy 137(2015) 211–221

Girja Saran and Rattan Jadhav: Performance of Single Pass Earth-Tube Heat Exchanger: An experimental study. Agricultural Journal. 6(2002), 32–40.

Haorong Li, Yuebin Yu, Fuxin Niu, Michel Sha. K, Bing Chen: Performance of a coupled cooling system with earth-to-air heat exchanger and solar chimney, Renewable Energy. 62(2014)468–477.

Hollmuller P. Analytical characterization of amplitude dampening and phase-shifting in air/soil heat-exchangers. Int. J Heat Mass Transf. 2003; 46:4303e17.

Vaibhav Madane, Meeta Vedpathak, M.D. Nadar. Thermal Analysis of earth air heat exchanger using CFD International Journal Of Engineering Sciences and Research Technology.

Ravi Ranjan Manjul, V.N. Bartaria. Earth Air Heat Exchanger Performance in Summer Cooling For Various Supply Air Conditions: A Review. International Journal of Engineering Trends and Technology. Volume 35 Number 8, May 2016 Page 387.

Ravi Ranjan Manjul, V.N Bartaria. Earth Air Heat Exchanger Performance in Summer Cooling For Various Supply Air Conditions: A Review. International Journal of Engineering Trends and Technology. Volume 35 Number 8 May 2016 Page 387,

Ajoy Debbarma. Performance of proposed earth-Tank Heat Exchanger: A Computational Study IOSR Journal of Engineering, Vol. 3, Issue 1, Jan. 2013, V2, pp. 68–72.

Krarti M, Kreider JF. Analytical model for heat transfer in an underground air tunnel. Energy Convers Manag. 1996;37:1561e74.

Krarti M., Krieder J.F. Analytical model for heat transfer in an Underground air tunnel. Energy Conservation and Management. 37 (10), 1996, 1567–1574.

Magraner T, Montero A, Quilis S, Urchueguı´a JF. Comparison between design and actual energy performance of a HVAC ground coupled heat pump system in cooling and heating operation. Energy Build 2010;42:1394e401.

Mihalakakou G, Santamouris M, Asimakopoulos D. Modelling the thermal performance of earth-to air heat exchangers. Sol Energy 1994;53:301e5.

Mihalakakou G. On estimating soil surface temperature profiles. Energy Build. 2002;34:251e9.

Djamel Belatrache, Saı¨d Bentouba, Mahmoud Bourouis. Numerical analysis of earth air heat exchangers at operating conditions in arid

climates. International Journal of Hydrogen Energy. 2016.

Ozgener L, Ozgener O. An experimental study of the exergetic performance of an underground air tunnel system for greenhouse cooling. Renew Energy 2010;35:2804e11.

Salsuwanda Selamat, Akio Miyara, Keishi Kariya. Analysis of Short Time Period of Operation of Horizontal Ground Heat Exchangers. Resources 2015, 4, 507–523; doi:10.3390/resources4030507

Sodha M.S., Buddhi D., Shawney R.L. Optimization of pipe parameters of an underground air pipe cooling system, Energy Conservation and Management. 34 (6), 1993, 465–470.

Catalin George Popovicia, Teodor Mateescua, Razvan Luciua, Ionela Cazacua. Innovative solutions for geothermal heat exchangers. Sustainable Solutions for Energy and Environment, EENVIRO 2016, 26–28 October 2016, Bucharest, Romania

Svec O.J., Goodrich L.E., Palmer J.H.L. Heat Transfer Characteristics of In-Ground Heat Exchangers. Energy Research 7, 1983, 265–278.

Thiers S. Energy and environmental assessments of positive energy buildings [Ph.D. thesis]. France: Ecole Nationale Superieure des Mines de Paris; 2008.

Tzaferis A, Liparakis D, Santamouris M, Argiriou A. Analysis of the accuracy and sensitivity of eight models to predict the performance of earth-to-air heat exchangers. Energy Build 1992;18:35e43.

Vahid Khalajzadeh, Ghassem Heidarinejad, Jelena Srebric. Parameters optimization of a vertical ground heat exchanger based on response surface methodology, Energy and Buildings. 43 (2011) 1288–1294.

Vikas Bansal, Rohit Misra, G.D. Agarwal, Jyotirmay Mathur: Derating Factor new concept for evaluating thermal performance of earth air tunnel heat exchanger, Applied Energy. 102 (2013) 418–426.

Vikas Bansal, Rohit Misra, Ghanshyam Das Agrawal, Jyotirmay Mathur. Performance evaluation and economic analysis of integrated earth–air–tunnel heat exchanger–evaporative cooling system, Energy and Buildings. 55 (2012) 102–108.

Voirel Badescu, Simple and accurate model for the ground heat exchanger of a passive house, Renewable Energy. 32, 2007, 845–855.

Wu H, Wang S, Zhu D. Modelling and evaluation of cooling capacity of earth-air-pipe systems. Energy Convers Manag. 2007; 48:1462e71.

Yang D, Guo Y, Zhang J. Evaluation of the thermal performance of an earth-to-air heat exchanger (EAHE) in a harmonic thermal environment. Energy Convers Manag 2016; 109:184e94.


  • There are currently no refbacks.