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    Earth Air Tunnel System

    Uploaded by

    Pournami
    The document discusses Earth Air Tunnel Systems (EATs) as a passive cooling technique for buildings. EATs utilize the stable underground temperature to cool incoming air through pipes buried several meters underground. Case studies show that EATs have successfully maintained indoor temperatures between 24-28°C in various buildings in India. The key benefits of EATs are that they are energy efficient, reduce pollution by providing fresh air circulation without mechanical cooling, and lower long-term operational costs compared to active cooling systems. However, their effectiveness can depend on soil conditions and humidity levels.

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    © All Rights Reserved
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    Earth Air Tunnel System

    Uploaded by

    Pournami
    725 views20 pages
    The document discusses Earth Air Tunnel Systems (EATs) as a passive cooling technique for buildings. EATs utilize the stable underground temperature to cool incoming air through pipes buried several meters underground. Case studies show that EATs have successfully maintained indoor temperatures between 24-28°C in various buildings in India. The key benefits of EATs are that they are energy efficient, reduce pollution by providing fresh air circulation without mechanical cooling, and lower long-term operational costs compared to active cooling systems. However, their effectiveness can depend on soil conditions and humidity levels.

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    Earth Air Tunnel System Ppt

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    The document discusses Earth Air Tunnel Systems (EATs) as a passive cooling technique for buildings. EATs utilize the stable underground temperature to cool incoming air through pipes buried several meters underground. Case studies show that EATs have successfully maintained indoor temperatures between 24-28°C in various buildings in India. The key benefits of EATs are that they are energy efficient, reduce pollution by providing fresh air circulation without mechanical cooling, and lower long-term operational costs compared to active cooling systems. However, their effectiveness can depend on soil conditions and humidity levels.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    725 views20 pages

    Earth Air Tunnel System

    Uploaded by

    Pournami
    The document discusses Earth Air Tunnel Systems (EATs) as a passive cooling technique for buildings. EATs utilize the stable underground temperature to cool incoming air through pipes buried several meters underground. Case studies show that EATs have successfully maintained indoor temperatures between 24-28°C in various buildings in India. The key benefits of EATs are that they are energy efficient, reduce pollution by providing fresh air circulation without mechanical cooling, and lower long-term operational costs compared to active cooling systems. However, their effectiveness can depend on soil conditions and humidity levels.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 20

    EARTH AIR TUNNEL SYSTEM

    Submitted by :
    MOHAMMED JUNAISE
    MEC15CE024
    Guide :
    MOHAMMED HIJAS
    CONTENTS

     Introduction
     Passive cooling techniques ( principle, type, material, working,
    installation )
     Earth Air Tunnel System (EATs)
     Case study
     Benefits and limitations of EATs
     Conclusion
    INTRODUCTION

    What will happen if this gradual increase of temperature will


    continues ?

    o world will urbanize


    o health issues
    o energy consumption
    o re-examinations of general design practices
    PASSIVE COOLING TECHNIQUES

    Need for passive cooling techniques

    o high temperature
    o excess use of energy
    o building consumes 40% of world’s energy
    o pollution
    o uses of now- renewable resources
    o low energy cooling techniques
    Passive Cooling of Buildings

    o natural process
    o balanced interior conditions
    o flow of energy by natural means ; radiation, convection &
    conduction
    o reducing the rate of heat gains
    o two conditions
    o environmental heat sinks
    o 30-40% of electrical load requirement
    EARTH AIR TUNNEL SYSTEM
    o passive air conditioning
    o save energy
    o reduce pollution
    o provide both cooling and heating
    Principle of Earth Air Tunnel System

    o utilize the heat-storing capacity


    o ground acts as heat sink
    o heat exchanges
    o high thermal inertia = temperature fluctuations reduces
    Types of Earth Air Tunnel System

    Closed loop system:

    o same air re circulates


    o U-shaped loop of pipe
    o 100-500ft length and 3-5m depth pipe
    Open loop system:

    o outside air is taken


    o 100ft long straight tube
    o reduce total HVAC capacity
    Combined system:

    o combination of both systems


    o constructed with dampers
    Material used for EATs

    o galvanized steel pipes / clay pipes / plastic coated metal pipe


    o 15-45cm diameter and smooth surface
    o smaller diameter pipes not prefer
    o a blower to suck air
    o blower with a filter
    Working

    o tunnel is dug below the ground


    o galvanized steel pipes
    o blower at entry
    o ground can be shaded
    o reduce by vegetation and sprinkler system
    o can exhaust fan = solar chimney
    o amount of heat exchanged depends on
    Installation recommendations

    o the depth should be 3-4m below


    o length of the tunnel 60-70m
    o thickness should be less
    o avoid sharp 90 degree turn
    o two 45 degree bends produce less turbulence but efficient
    o adjacent pipes should have a minimum gap
    o galvanized steel can be used
    o pipe overlay should be left loose or covered
    CASE STUDY
    EATs at BCIL Collective
    o passive air conditioning system for all homes
    o pipe network below 4m
    o provides a constant 24-25°C thermal temperature
    o largest ever earth tunnel air-conditioning system in the world
    o the only power that this system consumes is for fans
    EATS at KarBhawan, Jaipur
    o unique concept of providing comfort air
    o for 2200 sq. ft.
    o 80m tunnel of 0.7m diameter, 4m below
    o maintain 28°C
    BENEFITS AND LIMITATIONS OF
    EATs
    Benefits:
    o is an energy saver
    o better indoor air quality
    o complete fresh air circulation
    o cost effective
    o reducing pollution
    o minimum temperature at peak summer
    o consumes less energy
    o reduces long term operational cost and maintenance costs
    Limitations

    o performance of system depends on


    o less effective in humid climates
    o system will become less effective when soil
    o dry or low density soil will yeald the least benefit
    Scope for future research

    o Making it effective to use in humid climates.


    o Make it effective to use in low density soil.
    o Make it effective to tackle the problem of inefficiency due to
    long time usage.
    CONCLUSION

    o ground temperature is constant


    o employing the clean energy
    o site quantity and building thermal load necessity are key
    o passive energy is important for green building
    o it is in primary stage in INDIA
    o it is energy efficient
    THANK YOU

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