LEGACY_S_PIPE_ECC

Backward-compatible wrapper for the eccentric-pipe conduction shape factor. It preserves legacy naming while returning the same geometric factor used in simplified steady conduction analysis.

The heat-rate relation is:

Q = Sk(T_1 - T_2)

Excel Usage

=LEGACY_S_PIPE_ECC(D_one, D_two, Z, L)

D_one (float, required): Diameter of inner pipe (m).
D_two (float, required): Diameter of outer pipe (m).
Z (float, required): Offset between pipe centers (m).
L (float, optional, default: 1): Pipe length (m).

Returns (float): Shape factor (m).

Example 1: Example eccentric pipes

Inputs:

D_one	D_two	Z	L
0.1	0.4	0.05	10

Excel formula:

=LEGACY_S_PIPE_ECC(0.1, 0.4, 0.05, 10)

Expected output:

47.7098

Example 2: Unit length eccentric pipes

Inputs:

D_one	D_two	Z
0.2	0.6	0.08

Excel formula:

=LEGACY_S_PIPE_ECC(0.2, 0.6, 0.08)

Expected output:

6.19483

Example 3: Larger offset with longer length

Inputs:

D_one	D_two	Z	L
0.15	0.5	0.12	5

Excel formula:

=LEGACY_S_PIPE_ECC(0.15, 0.5, 0.12, 5)

Expected output:

34.9225

Example 4: Small diameter pipes

Inputs:

D_one	D_two	Z	L
0.05	0.2	0.03	2

Excel formula:

=LEGACY_S_PIPE_ECC(0.05, 0.2, 0.03, 2)

Expected output:

9.78228

Python Code

Show Code

from ht.conduction import S_isothermal_pipe_eccentric_to_isothermal_pipe as ht_S_isothermal_pipe_eccentric_to_isothermal_pipe

def legacy_S_pipe_ecc(D_one, D_two, Z, L=1):
    """
    Deprecated alias for S_pipe_ecc_to_pipe.

    See: https://ht.readthedocs.io/en/latest/ht.conduction.html

    This example function is provided as-is without any representation of accuracy.

    Args:
        D_one (float): Diameter of inner pipe (m).
        D_two (float): Diameter of outer pipe (m).
        Z (float): Offset between pipe centers (m).
        L (float, optional): Pipe length (m). Default is 1.

    Returns:
        float: Shape factor (m).
    """
    try:
        return ht_S_isothermal_pipe_eccentric_to_isothermal_pipe(
            D1=D_one,
            D2=D_two,
            Z=Z,
            L=L,
        )
    except Exception as e:
        return f"Error: {str(e)}"

Online Calculator

D_one *

Diameter of inner pipe (m).

D_two *

Diameter of outer pipe (m).

Z *

Offset between pipe centers (m).

Pipe length (m).