Potential cooling savings from a ground-coupled return-air duct system for residential buildings in hot and humid climates

Lok, Sung; Baltazar, Juan-Carlos; Haberl, J. S.

doi:10.1016/j.enbuild.2015.05.043

Cited by 35 publications

(9 citation statements)

References 21 publications

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“…The reduction in the temperature is plotted along the length of the pipe. Do et al [12] examined impact of using the EAHE in reducing the energy consumed for cooling the residential buildings in Texas, USA in a humid and a hot and humid climate, with a set of analysis of design elements affecting performance such as diameter and length of the pipe, humidity and air temperature the at the inlet, and the depth of burial. The simulation model was based on the closed system of the heat exchanger, where the buried pipe is directly connected with the building's air conditioning system.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of using earth-air heat exchangers to reduce building cooling and heating loads in southern Iraq

Salem

Almosawi

2022

QJES

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The Ground Air Heat Exchanger (EAHE) is an integrated passive heating and cooling system for many greenhouses, industrial and residential building applications. Reduces heating and cooling loads by transferring heat between ventilated air and the ground. In this paper, the performance of EAHE was studied numerically using the ESP-r program under weather and soil conditions in Al-Diwaniyah city (southern Iraq), connecting the pipe to a building model and testing it during the summer and winter months. In the case of summer, the results indicated a decrease in the temperature of the air supplied to the air-conditioned space, where the temperature reached 37.42 ° C, 40.09 ° C and 39.93 ° C, while the temperature of the outside air was 47.09 ° C, 47.45 ° C and 48.48 ° C during the summer. July, August and September respectively. In the case of the winter months, the air leaving the tube is heated to a temperature of 16.38°C, 13.99°C, 16.42°C, and 16.42°C, when the outside air temperature is 3.33°C, -0.01°C and 5.37° percentage during December, January and February, respectively. The use of this type of heat exchanger achieved a reduction of more than 10 ° C during the summer and an increase of more than 13 ° C in the winter.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of using earth-air heat exchangers to reduce building cooling and heating loads in southern Iraq

Salem

Almosawi

2022

QJES

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“…World energy consumption by building sector is rapidly increasing in recent years [1]. It is reported that almost half the building energy is consumed by the heating, ventilation, and air-conditioning systems [2].…”

Section: Introductionmentioning

confidence: 99%

On the Study of a Hybrid Indirect Evaporative Pre-Cooling System for Various Climates

Cui

Sun²,

Zhang

et al. 2019

Energies

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A hybrid air-conditioning system has been proposed by integrating an indirect evaporative pre-cooling unit. In the proposed system, the room exhaust air is employed in the indirect evaporative cooler (IEC) to pre-condition the ambient intake air. The mathematical formulation has been judiciously established for the pre-cooling IEC. The validation of the numerical model has been conducted by comparing the simulated results with the experimental data in terms of the outlet temperature and the heat flux along the heat exchanger surface. The pre-cooling performance of the IEC is theoretically investigated for the climate in representative cities selected from five different climate zones. The psychrometric illustration of the air conditioning variation has indicated that the ambient air can be pre-cooled and pre-dehumidified through the IEC. The possibility of water vapor condensation depends on the humidity ratio of the ambient intake air. The simulation result demonstrates the capability of the pre-cooling IEC to fulfill part of the cooling load of the ambient intake air resulting in a marked energy saving potential.

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“…The modeled EAHE provided 17.4 °C cooling potential in Juárez (extreme weather), 10.2 °C in Mérida (hot weather) and 10 °C in México City (mild weather), as well as 6.3 °C, 12.5 °C and 3.2 °C heating potential, respectively. Do et al [37] studied the cooling energy saving of a closed-loop EAHE in the hot and humid climate of Texas in the USA, and found that EAHEs could reduce the cooling energy demand for Huston and Dallas around 9.6% and 13.8%, respectively. Bisoniya et al [38] studied the heating/cooling potential of EAHEs for hot and dry climate of Bhopal in India.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the efficiency of earth to air heat exchange systems in cold and hot-arid climates

Fazlikhani

Goudarzi

Solgi

2017

Energy Conversion and Management

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In order to examine and compare the efficiency of earth to air heat exchanger (EAHE) systems in hot-arid (Yazd) and cold (Hamadan) climates in Iran a steady state model was developed to evaluate the impact of various parameters including inlet air temperatures, pipe lengths and ground temperatures on the cooling and heating potential of EAHEs in both climates. The results demonstrated the ability of the system to not only improve the average temperature and decrease the temperature fluctuation of the outlet air temperature of EAHE, but also to trigger considerable energy saving. It was found that in both climates, the system is highly utilized for pre-heating, and its usage is unfeasible in certain periods throughout the year. In winter, EAHEs have the potential of increasing the air temperature in the range of 0.2-11.2°C and 0.1-17.2°C for Yazd and Hamadan, respectively. However, in summer, the system decreases the air temperature for the aforementioned cities in the range of 1.3-11.4°C and 5.7-11.1°C, respectively. The system ascertains to be more efficient in the hot-arid climate of Yazd, where it can be used on 294 days of the year, leading to 50.1-63.6% energy saving, when compared to the cold climate of Hamadan, where it can be used on 225 days of the year resulting in a reduction of energy consumption by 24.5-47.9%.

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Potential cooling savings from a ground-coupled return-air duct system for residential buildings in hot and humid climates

Cited by 35 publications

References 21 publications

Numerical investigation of using earth-air heat exchangers to reduce building cooling and heating loads in southern Iraq

Numerical investigation of using earth-air heat exchangers to reduce building cooling and heating loads in southern Iraq

On the Study of a Hybrid Indirect Evaporative Pre-Cooling System for Various Climates

Numerical analysis of the efficiency of earth to air heat exchange systems in cold and hot-arid climates

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