Journal ArticleDOI
An intense review on the latest advancements of Earth Air Heat Exchangers
TLDR
A review of different combinations of Earth Air Heat Exchangers (EAHEs) is presented in this article, which addresses an elaborated description of the analytical and experimental studies on the different combination of EAHE and analyses the results from the thermal performance.Abstract:
Energy saving is a vital element in today's scenario. Earth Air Heat Exchangers (EAHE) is a technique that promotes energy savings. EAHE is a non-conventional technique that uses the earth's underground heat for space cooling/heating. In this article, review of different combinations of EAHEs is presented. The review presents an apprehensible summary of the previous works on EAHE. The review addresses an elaborated description of the analytical and experimental studies on the different combination of EAHE and analyses the results from the thermal performance. It also consider the environmental aspect in the field of energy saving. It is concluded from the summary that the design parameters directly or inversely affect the outlet temperature. The result also shows that the pipe materials does not have much influence on the outlet temperature. In the case of energy saving, EAHE technology saves more energy that can replace the conventional air conditioning systems. Thus, this technology can effectively reduce the greenhouse gases and improve the environment.read more
Citations
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Journal ArticleDOI
Review of energy conservation technologies for fresh air supply in zero energy buildings
TL;DR: In this article, a comprehensive review on energy conservation technologies for fresh air supply, including theoretical, experimental and simulation works, is presented, where the advantages and disadvantages, economy and climate adaptability of different energy conservation techniques for air supply in buildings are analyzed and discussed.
Journal ArticleDOI
Technological options and strategies towards zero energy buildings contributing to climate change mitigation: A systematic review
Luisa F. Cabeza,Marta Chàfer +1 more
TL;DR: In this paper, a systematic review of the technological options and strategies to achieve zero energy buildings was carried out to establish today state-of-the-art knowledge base and to present key design and performance factors that define those technologies with the final aim of contributing to climate change mitigation options of buildings.
Journal ArticleDOI
A review of geothermal energy-driven hydrogen production systems
Montaser Mahmoud,Montaser Mahmoud,Mohamad Ramadan,Mohamad Ramadan,Sumsun Naher,Keith R. Pullen,Mohammad Ali Abdelkareem,Mohammad Ali Abdelkareem,Abdul Ghani Olabi,Abdul Ghani Olabi +9 more
TL;DR: A review of hydrogen production systems using geothermal energy, showing the importance and potential of this technology in addition to the main obstacles facing this domain, was presented in this article, where the effect of several parameters was taken into consideration, such as geothermal fluid temperature, water electrolysis temperature, working fluid, and type of power cycle.
Journal ArticleDOI
Parametric study and design of an earth-air heat exchanger using model experiment for memorial heating and cooling
Yujiao Zhao,Yujiao Zhao,Ruoyao Li,Ruoyao Li,Changfa Ji,Changfa Ji,Chao Huan,Chao Huan,Bo Zhang,Bo Zhang,Lang Liu,Lang Liu +11 more
TL;DR: In this article, a 1:20 scale model is created to study the influence parameters on the thermal performance of the earth-air heat exchanger due to the limitations of field test and the experimental data were compared with other studies and achieved good agreement.
Journal ArticleDOI
Influence of geometrical parameters on the flow characteristics of multi-pipe earth-to-air heat exchangers – experimental and CFD investigations
TL;DR: In this paper, the sensitivity analysis of the flow characteristics to the change of multi-pipe exchanger geometry is presented, and a costless modification of heat exchanger supply-type from Z-type to U-type structure (change in air inlet location) is verified as a simple method of decreasing total pressure losses by 6-36% and improving airflow division uniformity by 11-80%.
References
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Journal ArticleDOI
Role of renewable energy sources in environmental protection: A review
TL;DR: In this paper, a review has been done on scope of CO2 mitigation through solar cooker, water heater, dryer, biofuel, improved cookstove and by hydrogen, which provides an excellent opportunity for mitigation of greenhouse gas emission and reducing global warming through substituting conventional energy sources.
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TL;DR: In this paper, the authors discuss the linkage between energy and economic, social, environmental, and security issues, and analyzes the contradictions between current patterns of use and objectives in these areas.
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Ground heat exchangers—A review of systems, models and applications
TL;DR: In the literature, several calculation models are found for ground heat exchangers as discussed by the authors, which can accommodate for any type of grid geometry that may give greater detail of the temperature variation around the pipes and in the ground.
Journal ArticleDOI
Performance analysis of earth–pipe–air heat exchanger for summer cooling
TL;DR: In this paper, a transient and implicit model based on computational fluid dynamics was developed to predict the thermal performance and cooling capacity of earth-air-pipe heat exchanger systems, which was validated against experimental investigations on an experimental set-up in Ajmer (Western India). Good agreement between simulated results and experimental data is obtained.
Thermohydraulic design of earth-air heat exchangers
Arnold Janssens,Michel De Paepe +1 more
TL;DR: In this paper, a one-dimensional analytical method is used to analyse the influence of the design parameters of the heat exchanger on the thermo-hydraulic performance and a relation is derived for the specific pressure drop, linking thermal effectiveness with pressure drop of the air inside the tube.