Performance analysis of integrated earth–air-tunnel-evaporative cooling system in hot and dry climate

Bansal, Vikas; Mishra, R. S.; Agarwal, Ghanshyam Das; Mathur, Jyotirmay

doi:10.1016/j.enbuild.2011.12.024

Cited by 90 publications

(29 citation statements)

References 11 publications

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“…Bansal et al [67] validated combination of EAHE system with evaporative cooler by using 3D multiphase CFD modeling with FLUENT 6.3, at Ajmer in India. Combined cooling effect was 7609 MJ in comparison to 4500 MJ in EAHE system.…”

Section: Modeling Of Eahe Systemsmentioning

confidence: 99%

Ground coupled heat exchangers: A review and applications

Soni

Pandey

Bartaria³

2015

Renewable and Sustainable Energy Reviews

160

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Section: Modeling Of Eahe Systemsmentioning

confidence: 99%

Ground coupled heat exchangers: A review and applications

Soni

Pandey

Bartaria³

2015

Renewable and Sustainable Energy Reviews

160

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“…Nayak and Tiwari [12,13] studied the photovoltaic integrated greenhouse coupled with the EAHE and estimated the energy matrices of the system for Indian climates. The evaporative cooling can enhance the performance of EAHE as suggested by Bansal et al [14].…”

Section: Introductionmentioning

confidence: 99%

Design of an Earth Air Heat Exchanger (EAHE) for Climatic Condition of Chennai, India

Tiwari¹,

Singh²,

Joshi³

et al. 2014

TOENVIRSJ

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Abstract:In the present work the ground temperature has been validated for climatic condition of Sriperumbudur near Chennai, India to evaluate thermal conductivity and diffusivity of the soil. For the evaluated thermal conductivity of the soil, an EAHE has been designed for a given dimension of room with optimized values of number of air changes, length of pipe, radius of pipe and depth at which heat exchanger to be installed below the surface of the earth. It has been observed that there is a decrease of 5 -6 0 C in the outlet air temperature in summer for a number of 5 air changes with 0.10 m and 21 m optimized diameter and length of pipe respectively.

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“…Hollmuller and Lachal [12] analyzed the constraints and potential of buried pipe systems for the case of a typical Central European climate (Geneva, Switzerland), with cold winters and warm summers, pointing out the distinct issues linked to preheating (winter) and cooling (summer). Finally, some authors examine the combination of EAHX with evaporative cooling [13].…”

Section: Experimental Projects and Guidelinesmentioning

confidence: 99%

Experimental and numerical study of an earth-to-air heat exchanger for air cooling in a residential building in hot semi-arid climate

Khabbaz

Benhamou

Limam

et al. 2016

Energy and Buildings

115

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Experimental and numerical study of an earth-to-air heat exchanger for air cooling in a residential building in hot semi-arid climate, Energy and Buildings http://dx.doi.org/10. 1016/j.enbuild.2016.04.071 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 3 ABSTRACT This work deals with an experimental and numerical study of an Earth-to-Air Heat Exchanger (EAHX) for air cooling, connected to a residential building located in Marrakech (Morocco) which climate is a hot semi-arid one. The EAHX consists of three parallel PVC pipes of 72 m length each and 15 cm inside diameter, buried at 2.2-3.2 m depth. Each pipe is equipped with a fan, which blows treated air into the building. The experimental study consists of summer monitoring of the EAHX via measurements of air temperature and humidity throughout the exchanger, as well as at its inlet and outlet to the building for two fixed values of the airflow rate. The experimental results show that the EAHX is a good semipassive system for air refreshment, as the recorded blown air temperature into the building is quasi-constant at 25 °C with air humidity around 40%, even though the outside temperature reaches more than 40 °C. Furthermore, the reduction of daily and annual air temperature amplitudes is characterized by an exponential drop as a function of pipe length. The characteristic length is found to be around 20m and 70m respectively for the daily and annual air temperature amplitudes reduction. Moreover, it is shown that the design guidelines from literature cannot straightforwardly be applied to an EAHX which is subject to meteorological disturbance from the upper surface and/or which is not operated all year round, for which numerical simulation with a validated models remains necessary. 1 EXPERIMENTAL AND NUMERICAL STUDY OF AN EARTH-TO-AIR HEAT EXCHANGER FOR AIR COOLING INOn the other hand, dynamic simulations of the EAHX using TRNSYS software (TYPE 460) were performed with one pipe or three pipes continuously running. Good agreement was found between the simulation and experimental results. Simulation results show that the EAHX can perform a maximum drop of air temperature as high as 19.5 °C and 18.3 °C respectively for an EAHX with one and three pipes. The achieving specific cooling capacity is 58 W/m 2 (one pipe) and 55 W/m 2 (three pipes) obtained for air temperatures of 25 °C and 26 °C respectively, at the EAHX outlet and 44.6 °C at its inlet.

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Performance analysis of integrated earth–air-tunnel-evaporative cooling system in hot and dry climate

Cited by 90 publications

References 11 publications

Ground coupled heat exchangers: A review and applications

Ground coupled heat exchangers: A review and applications

Design of an Earth Air Heat Exchanger (EAHE) for Climatic Condition of Chennai, India

Experimental and numerical study of an earth-to-air heat exchanger for air cooling in a residential building in hot semi-arid climate

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