Performance analysis of an earth-to-air heat exchanger assisted by a wind tower for passive cooling of buildings in arid and hot climate

In this study, a new method of using the earth‐air heat exchangers to reduce energy consumption in buildings is discussed. The idea is to couple the EAHE with the condenser of a residential air conditioning system to enhance the effectiveness of the latter. Under the climatic conditions of high temperature in summer (south‐eastern region of Algeria), which can sometimes exceed 50 °C, what makes the heat exchange between the air conditioner and the external environment very difficult in addition to the problem of thermal comfort and the cost of energy consumption. Conducting a simulation by the TRNSYS software that allows to couple the model of the EAHE with the condenser of a residential air conditioner and connect the system with a building. The results show a clear reduction in the energy consumed by this system in connection with the direct use of the air conditioner and increase air conditioning efficiency, coefficient of performance, and energy efficiency rating. In this paper the Hollmuller model was ameliorated and the obtained results are in concord with it. The system is capable of resolving the problem of mal cooling of buildings by air conditioners under critical climate conditions, in addition to lowering the heat output of the condenser, and reducing its effect on the environment.

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“…The heat transfer coefficient by convection between the air and the tube is given by the following correlation:

h_{c} = 0.023 R e^{0.8} P r^{n} \frac{λ_{a}}{D_{i n t}} .

…”

Section: Model Of the Heat Exchanger Air‐groundmentioning

confidence: 99%

“…In the literature, several models on buried heat exchangers, [13][14][15][16] present different models of simulation. The theoretical study of EAHE is presented by [18][19][20], and the results of this study are compared experimentally in this paper.…”

Section: Introductionmentioning

confidence: 99%

Contribution to the Study of the Reduction of Energy Consumption through the Exchanger Coupled Conventional Air‐Ground‐Air Conditioner. Application to the Building

Benhamza

Brima

Houda

et al. 2017

Heat Trans. Asian Res.

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“…iv Wet columns with 10 m height can reduce the indoor temperature by 12°C and RH by 22% [35] [ [35][36][37] Hot arid regions (Middle East) Integration of cooling devices with the conventional wind towers is beneficial with air exiting the towers at significantly lower temperature than the outside temperature e. Proposed design includes:…”

Section: Trombe Wallmentioning

confidence: 99%

Review of passive heating/cooling systems of buildings

Gupta

Tiwari²

2016

Energy Science & Engineering

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In this review, an attempt has been made to analyze passive solar heating and cooling concepts along with their effects on performance of a building's thermal management. The concepts of Trombe wall, solarium, evaporative cooling, ventilation, radiative cooling, wind tower, earth air heat exchanger, roof pond, solar shading for buildings, and building-integrated photovoltaic thermal (BiPVT) systems are extensively covered in this review. Comparison of results by various heating and cooling concepts has been made. It has been observed that direct heating through double-glazed window saves maximum conventional fuel for thermal heating during winter months. Further, an evaporative cooling is one of the best cooling concepts which is economical too in summer period. 2

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“…In EAHE system, air circulated through pipes, which buried in the soil, to transfer its heat to the surrounding soil; then, the cooled air enters the building space [12]. The concept of EAHE dated back to ancient periods [131]. For example, in Persian architecture EAHE called Naghb which has been applied in buildings for cooling the air by means of temperature gradient between outdoor air and the earth.…”

Section: Earth To Air Heat Exchangers (Eahe)mentioning

confidence: 99%

A review on windcatcher for passive cooling and natural ventilation in buildings, Part 1: Indoor air quality and thermal comfort assessment

Jomehzadeh

Nejat

Calautit

et al. 2017

Renewable and Sustainable Energy Reviews

164

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Performance analysis of an earth-to-air heat exchanger assisted by a wind tower for passive cooling of buildings in arid and hot climate

Cited by 92 publications

References 45 publications

Contribution to the Study of the Reduction of Energy Consumption through the Exchanger Coupled Conventional Air‐Ground‐Air Conditioner. Application to the Building

Contribution to the Study of the Reduction of Energy Consumption through the Exchanger Coupled Conventional Air‐Ground‐Air Conditioner. Application to the Building

Review of passive heating/cooling systems of buildings

A review on windcatcher for passive cooling and natural ventilation in buildings, Part 1: Indoor air quality and thermal comfort assessment

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