Fabricating and testing of the ground coupled air conditioner for residential applications in Iraqi weather

Mushtaq I. Hasan and Eman Kareem Jabbar

Energy, 2021, vol. 216, issue C

Abstract: In this paper, the ground-coupled air conditioning system has been experimentally studied in the weather of Nassriyah city, Iraq. Through the use of two systems of air conditioners of the same type (split-type air conditioner) with a capacity of 12,000 Btu/h where the first system is used a conventional air conditioner refers to (CAC).It cooled by the air with a condenser pipe length is about 13 m and the diameter is about 6.3 mm, meanwhile, the other system (modified air conditioner) refers to (MAC).It cooled by burying the condenser pipes inside the ground within a depth of about 3.5 m and a length of 27.5 m with a diameter of the pipe of 6.3 mm which used the ground as a heat sink. It is known that the temperature of the ground is constant almost depth of 3 m which it is measured at the Nasiriyah city and it found to be 26.1 °C around the year, therefore; The earth has a lower temperature compared to the temperature of the surrounding at Summers season and vice versa so that it happened at Winter season, that makes the ground to become a good heat sink for ground heat exchangers.The results of the two systems which performed from the end of April 2019 until the end of July 2019 showed that the coefficient of performance of MAC, it is higher than that for CAC with values of (6.1–8.48) and (5.5–7.1), respectively, Also it is found that the modified system is consuming lower electrical energy. The recovery period of the system calculated and found to be (8 months).

Keywords: Air conditioner; Copper coil; Ground coupled heat exchanger (GCHE); Earth air heat exchanger (EAHE); Direct expansion ground-coupled heat pump(DX-GCHP) (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:216:y:2021:i:c:s036054422032363x

DOI: 10.1016/j.energy.2020.119256

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