2. Plan
01. General idea
about Canadian
wells.
02. Presentation of
the house on the
Tangier website.
03. Simulations and
application of
software.
04. Analyses and
results.
05. Integration of the
air-ground heat
exchanger.
2
3. Introduction
In recent years, successive channels
have imposed reversible air conditioning
as a matter of course. But its use is at
the origin of several numerous
ecological problems. and yet, there are
alternative solutions drawn from
bioclimatic construction
3
9. Tangier Climate
1. Average monthly precipitation
3. Monthly hours of sunshine:
2. Average temperature by month:
Q4. Average humidity:
9
10. Presentation of the house:
Plan, section, elevations, and floor plan of the
house
Ground floor plan
10
11. Presentation of the house:
Section A-A wall and floor surface
11
Designation Area
(m²)
South Facade 44.1
North Facade 49
East Facade 29.4
West Facade 32.4
Roofing 130
Interior wall 49.9
Floor 108
12. Composition of the frame of the
house:
Exterior wall characteristics Interior wall characteristics
12 Annual Review
13. Composition of the frame of the
house:
Characteristics of the high floor Characteristics of the low floor
13 Annual Review
14. Composition of the frame of the
house:
Standard double-glazed windows:
14
16. Main Sizing Parameters
• Total Air Flow
• Number and Diameter of Tubes
• Air Velocity in the Tubes
• Tube Length
• Distance Between Tubes
• Depth of Tube Burial
• Soil Nature and Moisture Content
• Interior Roughness of Tubes
• Nature of the Tubes
• Exchanger Geometry
• Influence of the Presence of a Nearby Building
• Influence of the Presence of a Nearby Water Table
• Air Humidity
• The Bypass
16 Annual Review
17. Assumptions Considered:
The Canadian well has the following characteristics:
• An air inlet from outside the property with a height of h = 1.2m.
• The burial level of the well is equal to h = 2m deep.
• A pipe arranged horizontally beneath the soil at a depth of h = 2m.
• An air outlet located outside the property at a height of h = 2m
17 Annual Review
Geometric Assumptions:
18. Thermal Assumptions:
The geometric model presented above can be further simplified as follows:
• The air flow rate inside is identical.
• Dimensions and physical properties are the same.
• Heat exchange occurs in steady-state.
• The soil is considered homogeneous.
• Air and soil characteristics (density, thermal conductivity, specific heat...)
are considered constant.
• In a cross-sectional conduit perpendicular to the flow, the air is considered
homogeneous.
• The exterior tube temperature is constant, assuming that the thermal inertia
of the soil is much larger than the exchanged heat quantities.
• The air velocity is considered constant along the conduit.
• The soil is assumed to be humid clay.
18 Annual Review
In this study, we consider that:
19. “
Fixing parameters and
calculations
Pipe Type High-Density Polyethylene (HDPE)
Diameter Between 10 cm and 20 cm
Inlet temperature Ta,in = 30 °C
Average ground temperature Tground = 19 °C
Pipe conductivity
(polyethylene)
ρ = 1,25 kg/m3
Air specific heat (Cp) Cp = 1 006 J/kg.k
Air density at 1013 mbar λ = 0,51 W/m.K
The volume of the house V = 302,4 m3
Air renewal rate qv = 0,028 m3/s
20. “Variable settings Length Temperature
Diameter : 0,150m
Thickness :
0,004mVelocity :
1,768 m/s
67,40m 24,9°c
Diameter : 0,110m
Thickness :
0,002mVelocity :
3,173m/s
39,36m 26,3°c
Influence of Parameters on Length and
Temperature
23. The GAEA software
23
GAEA is a software developed by the Department of
Physics and Applied Solar Energy for Buildings at the
University of Siegen in Germany. It allows for the
simulation of well effects based on the definition of well
conduits (length, number of lines, etc.), ventilation
(without differentiation between single or double-flow
mechanical ventilation), and energy cost.
25. Variation in air temperature at the
exit of the heat exchanger.
25
26. variation de la température de l’air à
l’intérieur de l’échangeur pour une
journée:
26
27. There are compelling reasons to increasingly prioritize
renewable energies in order to preserve fossil fuels
used for various purposes. Renewable energies, in
many respects, present a credible alternative to meet
the planet's energy needs
