Techno-economic analysis and energy performance of a geothermal earth-to-air heat exchanger (EAHE) system in residential buildings: A case study
Mostafaeipour A. Goudarzi H. Khanmohammadi M. Jahangiri M. Sedaghat A. Norouzianpour H. Chowdhury S. Techato K. Issakhov A. Almutairi K. Hosseini Dehshiri S.J.
October 2021John Wiley and Sons Ltd
Energy Science and Engineering
2021#9Issue 101807 - 1825 pp.
Natural air ventilation in the hot-dry regions plays a key role to decrease indoor air temperature in hot season, also to improve thermal comfort during the cold season. One of the most common ways to take advantage of natural ventilation is using wind catcher with an underground tunnel. In this method, the tower catches the airflow and directs it to the underground tunnel to decrease the air temperature by transferring heat to the ground, which is cooler in the summer and warmer in the winter. Earth-to-air heat exchanger (EAHE) is a modern form of wind catcher with underground tunnel. In this method, air after passing through buried pipes exchanges heat with the ground, and its temperature increases in the winter and decreases during the summer. This study analyzes the energy performance and cost-effectiveness of earth-to-air heat exchanger to be utilized in a residential building in climate condition of the province of Kermanin Iran. In this regard, 9 different configurations of the EAHE are investigated to find the optimized EAHE. The system performance and cost-effectiveness are studied in 3 different depths including 1, 2, and 3 m with 3 different pipe lengths including 25, 50, and 75 m. The results show that the EAHE is capable of reducing the inlet air temperature by 0.5-9.9℃ in the summer and increasing it by 0.9-11.2℃ in the winter. Furthermore, by integrating the EAHEs in a building design, one can reduce the total annual cooling load by 1.25%-3.97% and for heating by 1.34%-3.96%. The payback period of the system with a pipe length of 25 m is 16 years, but for the systems with pipe lengths of 50 and 75 m, this period reduces to almost 3 years.
cooling building , earth-to-air heat exchanger , economic evaluation , geothermal , hot and dry climate , sustainable design
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Industrial Engineering Department, Yazd University, Yazd, Iran
School of Architecture and Planning, University of New Mexico, Albuquerque, NM, United States
School of Architecture and Environmental Design, Iran University of Science and Technology, Tehran, Iran
Department of Mechanical Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
Department of Mechanical Engineering, School of Engineering, Australian College of Kuwait, Kuwait, Kuwait
Faculty of Environmental Management, Prince of Songkla University, HatYai, Thailand
Environmental Assessment and Technology for Hazardous Waste Management Research Center, Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand
Faculty of Mechanics and Mathematics, Department of Mathematical and Computer Modelling, Al-Farabi Kazakh National University, Almaty, Kazakhstan
Department of Mathematics and Cybernetics, Kazakh-British Technical University, Almaty, Kazakhstan
Community College, Mechanical Engineering Technology, University of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
Department of Industrial Management, Faculty of Management and Accounting, Allameh Tabatabai University, Tehran, Iran
Industrial Engineering Department
School of Architecture and Planning
School of Architecture and Environmental Design
Department of Mechanical Engineering
Department of Mechanical Engineering
Faculty of Environmental Management
Environmental Assessment and Technology for Hazardous Waste Management Research Center
Faculty of Mechanics and Mathematics
Department of Mathematics and Cybernetics
Community College
Department of Industrial Management
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