def alpha_cond_deph(lyambda_cond_dist, rho_cond_dist, mu_cond_dist, P_mass, n_pipe_deph, L_pipe_deph):
    """
    Calculates the coefficent of heat transfer(alpha) from steam to wall of pipe.
    Parameters
    ----------
    lyambda_cond_dist : float
        The thermal conducivity condensate of distilliat , [W / (m * degrees celcium)]
    rho_cond_dist : float
        The destiny condensate of distilliat, [kg / m**3]
    mu_cond_dist : float
        The viscosity condensate of distilliat, [Pa / s]
    P_mass : float
        The mass flow rate of distilliat, [kg/s]
    n_pipe_deph : float
        The number of pipes in dephlegmator, [dimensionless]
    L_pipe_deph : float
        The length of pipes, [m]    
    Returns
    -------
    alpha_cond_deph : float
        The coefficent of heat transfer(alpha) from steam to wall of pipe, [W / (m**2 * degrees celcium)]
    References
    ----------
    Дытнерский, формула 2.24, стр.53
    """        
    if n_pipe_deph < 100:      
        return lyambda_cond_dist * 3.78 * ((rho_cond_dist**2)* n_pipe_deph * L_pipe_deph / (mu_cond_dist * P_mass))**(1/3)
    if n_pipe_deph > 100:
        return 0.6 * lyambda_cond_dist * 3.78 * ((rho_cond_dist**2)* n_pipe_deph * L_pipe_deph / (mu_cond_dist * P_mass))**(1/3)