###### Abstract
With regard to the whole AAV structure, including the longitudinal finned tube array, underframe, and support as well as accounting for factors arising from the surrounding terrain and wind fluctuations, the calculations can be carried out in accordance with Eurocode 1991-1-4 [18], which refers to wind action on structures. However, in the case of unshielded vaporizers, such calculations are partially simplified because they refer to the flat reference area of the entire structure (orthogonal projection of the surface) that resists the wind action. Therefore, the effect of wind action on individual finned tubes, which are profiles with sharp edges and complex shapes, is not considered. On the other hand, considering the wind action on a single finned tube profile according to the Eurocode procedure, it is possible to determine the wind load on a structural element with sharp section edges. However, the above calculation procedure requires the assumption of aerodynamic drag coefficients depending on the profile cross section. The wind force according to Eurocode is given by Equation (1), whereas the peak velocity pressure is given by Equation (2). From Equations (1) and (2) it follows that the aerodynamic drag coefficient can be determined using the formula given by Equation (3). \[F_{w}=c_{f}c_{d}\cdot c_{f}\cdot q_{p}(z_{e})\cdot A_{ref} \tag{1}\]  
\[q_{p}(z_{e})=0.5\cdot\rho\cdot v^{2}(z_{e}) \tag{2}\]  
\[c_{f}=\frac{F_{w}}{0.5\cdot\rho\cdot v^{2}(z_{e})\cdot A_{ref}} \tag{3}\]  
where: \(F_{w}\)--wind force [N], \(c_{f}\cdot c_{d}\)--structural factor (\(c_{f}\)\(c_{d}\) = 1, for structures lower than 15 m), \(c_{f}\)--force coefficient for the structure or structural element (drag coefficient), \(q_{p}\) (\(z_{e}\))--peak velocity pressure [Pa] at reference height \(z_{e}\) [m], \(A_{ref}\)--reference area for the structure or structural element [m\({}^{2}\)], \(\rho\)--air density [kg/m\({}^{3}\)], \(v(z_{e})\)--wind speed at reference height [m/s\({}^{2}\)]. For the above formulas, once the value of the drag coefficient and the cross-sectional area in the plane perpendicular to the wind direction are known, the value of the aerodynamic force acting on the object can be estimated. In general, this method is used while designing many industrial facilities, for its part, aerodynamic coefficients are usually determined experimentally in wind tunnels. Some of these studies were reported in publications. For example, [PERSON] et al. (2011) [19] determined the aerodynamic coefficient for various blade types of a carousal wind turbine based on wind tunnel experiments, whereas [PERSON] et al. (2019) [20] developed an aerodynamic measurement on horizontal axis wind turbines in order to estimate the loads of blades in atmospheric conditions. Wind tunnel tests were performed to validate the aerodynamic measurement platform. [PERSON] et al. (2016) [21] presented the results of numerical simulations of the flow around a three-bladed wind turbine with a horizontal axis. The aim of the research was to analyze the boundary conditions to be used in numerical simulations, accounting for blockage effects in wind tunnel experiments for large wind turbines. In turn, [PERSON] (2014) [22] determined drag coefficients and loads on a mobile elevating working platform. Various angles of wind attack are considered in wind tunnel tests. [PERSON] et al. (2017) [23] presented the results of a CFD analysis of wind effects on eave frames. The obtained loads from the airflow analysis were then adopted for further static structural analysis. [PERSON] et al. (2016) [24] presented results of wind tunnel experiments for free-standing lighting protection masks placed on building roofs. The purpose of the study was to determine aerodynamic coefficients for further calculations of wind loads acting on the considered masts. [PERSON] et al. (2020) [25] studied the flow around circular ribbed cylinders, including the impact of ribs and surface roughness on the drag and vortex shedding.