An experimental study of summer performance of a recirculation type underground airpipe air conditioning system

Sawhney, Ravinder Singh; Buddhi, D.; Thanu, N.M.

doi:10.1016/s0360-1323(98)00009-2

Cited by 40 publications

(6 citation statements)

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“…Depending on the climatic zone and weather fluctuations, the EAHE can either satisfy the needs alone or must be coupled with other system. The other system could be working on renewable energies, like solar systems, biomass… or other traditional systems like heat pumps, air conditioner… As a standalone system, Sawhney et al [13] studied an EAHE for cooling of a building in India, they observed that reasonably good thermal comfort conditions can be created in the building with such a system with a COP reaching 3.35. However, in different climate EAHE can only pre-heat and cool the air as showed in a study by Chiesa et al [14] of an EAHE coupled with an air handling unit (AHU) for 1050 (2022) 012005 IOP Publishing doi:10.1088/1755-1315/1050/1/012005 4 heating and cooling of a school building in Italy.…”

Section: Operation Modementioning

confidence: 99%

A Review – Earth-air Heat Exchanger: Applications, Advances and Challenges

Zeitoun

Lin

Siroux

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Due to global warming and energy security, renewable energy systems became a subject of interest in research. Earth-air heat exchanger is one of these systems that can decrease the primary energy consumption using shallow layers of the ground as a source or sink of heat. Different configurations and designs of EAHEs were under research to assess their performance and find the optimal designs. It is important to identify and classify these designs to further develop innovative research on this topic. This review sheds light on the different classifications of EAHEs and their applications.

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Section: Operation Modementioning

confidence: 99%

A Review – Earth-air Heat Exchanger: Applications, Advances and Challenges

Zeitoun

Lin

Siroux

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…In the closed-loop system, the air is continuously recirculated from the pipe / tunnel buried in the occupied space. [5,39] Sawhney et al has analysed how EAPHE is being recirculated in Ghoshi, India's unconventional research institute for cooling eight of its chambers. In another study, the recirculation system combines with the conventional air conditioning system to analyse the performance (COP) of the system.…”

Section: Basic Geometry Of Eaphe and Various Modelling Approachesmentioning

confidence: 99%

“…It has been found that geothermal energy is one of the most attractive as well as important passive sources/means to cool/heat the construction sector and has been used over past three decades since the 1973 oil spills [3]. Current research shows that virtually three environments are used significantly to heat or cool the building sector by exploiting geothermal energy, including (a) the earthling air pipe heat exchanger [4][5][6] (b) (c) GSHP [9,10]. In the heat exchanger of the earth pipe, ambient air is blown through the duct with the blower or blower in which the heat change process takes place due to the temperature gradient between the basement and the blowing air and this direct or indirectly is used for heating or cooling (thermal comfort) in the construction sector by season.…”

Section: Introductonmentioning

confidence: 99%

“…Goswami and Bisnoi demonstrated both the open loop system and the indirect system in which the COP of both systems were compared. In the closed-loop system, the air is continuously recirculated from the pipe / tunnel buried in the occupied space [5,39]. Sawhney et al has analysed how EAPHE is being recirculated in Ghoshi, India's unconventional research institute for cooling eight of its chambers.…”

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confidence: 99%

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Development of Passive Energy Source as Earth Air Pipe Heat Exchangers (Eaphe) System - A Review

Verma

Bansal

Rana

2020

Journal of Thermal Engineering

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Diversity in living standards and population growth leads to increased global energy consumption. Human comfort always plays a vital role in using different means to reduce the effects of weather conditions. The building sector captures approximately 40% of the global energy and it is most commonly used for cooling and for heating of the space occupied due to the use of appliances such as room heaters or air coolers, air conditioners, etc. The use of these appliances contributes significantly to global warming, which is a very serious environmental problem. Passive energy sources are used widely to reduce the consumption of energy due to heating and cooling of the building. Earth air pipe heat exchanger is one of the passive cooling/ heating technology used for the indoor thermal comfort of the occupants. In this review article, various discussion has been done on the use of passive energy explained by the earth air pipe heat exchanger and various investigations conducted by authors under different conditions and parameters like air velocity, pipe depth, pipe length, etc. that the thermal conductivity of the soil is the key point to the efficient operation of the earth air pipe heat exchanger system and it is also necessary to maintain the thermal conductivity of the soil in the vicinity of the pipe in order to achieve better performance in operation.

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“…Thus, a closed-loop EAHE system may be more suitable for residential applications. With respect to this element of an EAHE system's applicability, the majority of EAHE studies for the last two decades have been conducted on open-loop EAHE systems, including experimental and theoretical studies [4,6,[10][11][12][13][14][15][16][17][18][19] of outdoor ventilation air with EAHE systems; conversely, there has been a lack of studies performed on closed-loop EAHE systems [20]. M a n u s c r i p t 3 This study aims to evaluate the potential benefits of using the closed-loop EAHE system, which is a return-air duct system coupled with an EAHE system, for cooling energy use in residential buildings in the hot and humid climate of Texas.…”

Section: Introductionmentioning

confidence: 99%