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Seminar Report 2.docx - Ground-Coupled Heat Exchangers...

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Ground-Coupled Heat Exchangers: Types, Functions and Applications Yousuf Osman Submission Date: 31 st of November 2017 Professor: Luc Vechot “On my honor, as an Aggie, I have neither given nor received unauthorized aid on this academic work.”
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Abstract The environmental conditions of our mother plant are at an all-time low. The enormous release of emissions has largely contributed to the environmental degradation. Air conditioning is one of the contributors to this pollution. However, it could be replaced with a Ground-Coupled heat exchanger (GCHE) to reduce these emissions. The purpose of this research paper is to study Ground-Coupled heat exchangers (GCHE): types, functions and applications. The main types of GCHE’s are Earth-Air heat exchangers (EAHE or EAHX) and Ground-Source heat pumps (GSHP). The GCHE system utilizes the thermal energy of the earth to provide cooling or heating during summer or winter. Using the fact that the underground earth has a constant temperature, all year long, at a fixed depth, the GCHE system applies heat transfer mechanism to transport heat from/to the ground. There are many differences and similarities between the GSHP and the EAHX systems. The differences include the material flowing through the pipes and the configurations in which the system is installed. There are experimental studies in different regions around the world that discuss the feasibility of using the GSHP system under different conditions. On the other hand, for the EAHE system, the modeling of the system and calculations of effectiveness will be demonstrated. As with any engineering system, there are safety hazards and precautions that need to be taken into consideration. The use of GCHE systems is increasing worldwide. However, their applications are not just limited to replacing air conditioning. Its applications also include space conditioning, water heating, agricultural drying, bathing, swimming, etc. The GCHE systems operate at a higher efficiency and saves money in the long run. It should replace the traditional air conditioner. Keywords: Environmental Conditions, Air Conditioning, GCHE, Heat Transfer Mechanism, GSHP, EAHX 1
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Table of Contents 1. Introduction ................................................................................................................................. 1 2. Environmental Conditions ........................................................................................................... 2 2.1 Carbon Dioxide ....................................................................................................................... 2 2.2 Paris Agreement ..................................................................................................................... 3 3. Types of Ground-Coupled Heat Exchangers (GCHE) .................................................................... 3 3.1 Ground Source Heat Pump (GSHP) ........................................................................................ 3 3.2 Earth Air Heat Exchanger (EAHE or EAHX) ............................................................................. 4 4. Different Alignments for GCHE .................................................................................................... 4 4.1 Horizontal loop ....................................................................................................................... 5 4.2 Vertical Loop ........................................................................................................................... 5 4.3 Pond Loop .............................................................................................................................. 6 5. Ground Source Heat Pump or Air-Source .................................................................................... 6 6. Conclusion .................................................................................................................................... 8 7. Acknowledgement ....................................................................................................................... 8 8. Nomenclature .............................................................................................................................. 8 9. References .................................................................................................................................... 8 2
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List of Figur Figure 1: Global Carbon Dioxide Emission in 2015 .......................................................................... 2 Figure 2: Schematic of EAHX System ............................................................................................... 4 Figure 3: Horizontal Loop ................................................................................................................. 6 Figure 4: Vertical Loop ..................................................................................................................... 6 Figure 5: Pond Loop ......................................................................................................................... 7 Figure 6: Applications of GCHE systems in 2015 .............................................................................. 8 List of TablesY Table 1: Summary of the differences between EAHX and GSHP Systems ....................................... 5 3
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1. Introduction The Ground-Coupled Heat Exchanger system work on the mechanism of heat transfer. Heat
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