def alpha_vap(lyambda_cond, rho_cond, mu_cond, flatesteam_feed, n_pipe, d_outside):
    """
    Calculates the coefficent of heat transfer(alpha) from steam to wall of pipe.
    Parameters
    ----------
    lyambda_cond : float
        The thermal conducivity of condensate, [W / (m * degrees celcium)]
    rho_cond : float
        The destiny of condensate, [kg / m**3]
    mu_cond : float
        The viscosity of condensate, [Pa / s]
    flatesteam_feed : float
        The flow rate steam of feed heat exchanger, [W] [J/s]
    n_pipe : float
        The number of pipes in heat exchanger, [dimensionless]
    d_outside : float
        The outside diameter of pipe, [m]    
    Returns
    -------
    alpha_vap : 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
    """              
    return lyambda_cond * 3.78 * ((rho_cond**2)* n_pipe * d_outside / (mu_cond * flatesteam_feed))**(1/3)