Parallelepiped Body

Usage

Plate Heat Transfer 
from HeatTransfer import ParallelepipedicBody

# Define the thermal configuration for each face
thermal_measurements = {
    'top': {'Tp': 60.0, 'isolated': False},
    'bottom': {'Tp': 60.0, 'isolated': False},
    'front': {'Tp': 60.0, 'isolated': False},
    'back': {'Tp': 60.0, 'isolated': False},
    'left': {'Tp': 60.0, 'isolated': False},
    'right': {'Tp': 60.0, 'isolated': False}
}

# Create the object
objet = ParallelepipedicBody.Object(
    L=0.6,  # Length [m]
    W=0.8,  # Width [m]
    H=1.5,  # Height [m]
    Ta=25,  # Ambient temperature [°C]
    faces_config=thermal_measurements
)

# Calculate heat transfers
objet.calculate()

# Display results
print(f"Total transfer: {objet.get_total_heat_transfer():.2f} W")
print(objet.df)

Results

Total transfer: 1956.56 W
     Face        Orientation  Surface (m²) Tp (°C)  Ta (°C) ΔT (°C) Isolated  Heat Transfer (W)  Heat Flux (W/m²)
0     top    Horizontal (up)          0.48    60.0       25    35.0    False             191.19            398.31
1  bottom  Horizontal (down)          0.48    60.0       25    35.0    False             189.98            395.80
2   front           Vertical          1.20    60.0       25    35.0    False             450.11            375.09
3    back           Vertical          1.20    60.0       25    35.0    False             450.11            375.09
4    left           Vertical          0.90    60.0       25    35.0    False             337.58            375.09
5   right           Vertical          0.90    60.0       25    35.0    False             337.58            375.09
6   TOTAL                  -          5.16       -       25       -        -            1956.56            379.18

The calculation returns:

  • Total heat transfer: Sum of losses from all faces [W]

  • Detailed DataFrame: For each face (top, bottom, front, back, left, right)

    • Surface area [m²]

    • Wall temperature [°C]

    • Convection coefficient [W/m²·K]

    • Convection transfer [W]

    • Radiation transfer [W]

    • Total transfer per face [W]

Possible Parameters

Face configuration (faces_config dictionary):

Each face can have:

  • 'Tp': Wall temperature [°C]

  • 'isolated': True or False (insulated face or not)

Available faces: 'top', 'bottom', 'front', 'back', 'left', 'right'

Model Explanation

This model calculates the heat transfer from a parallelepiped body (rectangular box) to the ambient environment.

The calculation takes into account:

  1. Natural convection: Heat exchange between the surface and ambient air

  2. Radiation: Heat emission by radiation to the environment

For each face, the model:

  • Calculates the exchange surface area

  • Determines the convection coefficient according to orientation (horizontal/vertical)

  • Calculates convection and radiation fluxes

  • Sums contributions to obtain the total transfer