Design and Analysis of HVAC system using Earth Air Tunnel Heat Exchanger
Date
2022-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Pulchowk Campus
Abstract
The Earth Air Tunnel Heat Exchanger (EATHE) is a passive cooling and heating
system for interior spaces. The hybrid method uses an active agent fan for air
movement, but a passive agent ground soil is used to cool and heat the air. Since the
temperature of the earth underneath remains constant and around human comfort
levels, pipes are placed underground and air is blown through them to cool or heat
according to the season. EATHE may be used to cool homes, buildings, and other
systems, and it is still in use in some locations. There is a need to transition from
high-energy active user tactics to low-energy ones. One of these strategies is EATHE.
There has been a lot of study done on it, including the creation of methods for heat
exchanger design, CFD analysis, and so on. The purpose of this work is to contribute
to the further development of EATHE. We devised an approach in which we assume a
maximum cooling load in a building and construct a heat exchanger based on this
input factor, determining the needed pipe diameter and length to cool the load inside
the building. We assume certain conditions, such as the needed room temperature, the
maximum outside temperature, and the air velocity. The purpose of this publication is
to promote the usage and research of ground source heat energy. Although EATHE
has a higher initial installation cost than a VRF air-conditioning system, it saves
greatly on both power and costs over time. We recognize the limitations of EATHE
systems in comparison to AC systems and hope that my research will assist others in
overcoming them.
Description
The Earth Air Tunnel Heat Exchanger (EATHE) is a passive cooling and heating
system for interior spaces. The hybrid method uses an active agent fan for air
movement, but a passive agent ground soil is used to cool and heat the air
Keywords
Cooling, Heating, Air conditioning, Earth Air Tunnel Heat Exchanger
Citation
MASTER OF SCIENCE IN MECHANICAL SYSTEMS DESIGN AND ENGINEERING