Thermal Design Worksheet. An interactive, graphical worksheet designed to speed cooling tower thermal calculations. Set your own values for wet bulb, range and altitude, and plot your own demand curve on virtually any printer. Performance Evaluator. Evaluates induced draft counterflow and crossflow cooling tower performance with field acquired.

The cooling tower itself should be modeled as a tank with design data entered through the Tank property grid as shown in Figure 3. • Elevation should be set to the elevation of the bottom of the basin of the cooling tower. • Surface Pressure should be set to 0.0 psig if the cooling tower is open to atmosphere. If the cooling tower is pressurized or under vacuum, the pressure (or vacuum) exerted on the surface of the liquid should be entered. • Liquid Level should be set to the level of the liquid as measured from the bottom of the tank, typically the basin depth (5 feet in the model shown above) for cooling towers.

Click the Penetrations field of the Tank's property grid to open the Tank Penetrations dialog box, shown in Figure 4. Test plan forsunok siemens software. This is where you must specify the Penetration Height of each pipe connected to the tank. For example, the return sprayers come in to the top of the cooling tower at 20 feet measured from the bottom of the tower. The outlet pipe to the suction of the pump penetrates the tower at the bottom of the tank, or 0 feet. The default penetration height is 0 feet (or meters if metric units are selected).

Figure 4. Tank Penetrations dialog box to define the height at which each pipe enters the tank, as measured from the Bottom Elevation of the tank. For reference to older versions of PIPE-FLO see.

• the value of NTUm for design conditions is calculated; • the line of slope n and constant C is plotted and adjusted on the design point; • for other operating conditions, determined by the fluid flows, the abacus allows us to find, at abscissa L/G and on the tower characteristic line, the new values of NTUm and approach, which determines the outlet water temperature and therefore the capacity. The air outlet temperature is deduced. For another cooling or other air wet bulb temperature, it is possible to recalculate another abacus. Knowing the values of variables (NTUm, L/G) from the original chart, we get the new approach. It seems necessary to warn the reader: we tried to implement this approach on some experimental data either provided by the manufacturers or that we were able to get, and we realized that, when applied to NTUm, the correlations of the type Merkel lead to accurate reconstructions with values n and m close to those we have indicated. However they may be different when we use an (epsilon, NTU) approach similar to those of dry heat exchangers.

The static pile driver is noise- and vibrationless and is suitable for all types of piles. The static pile drivers enables installing piles to the designed depth without excavating. Performance The pile driving time depends on the type of soil and can reach 5-6 minutes. Design features. Minimum required space is 10x10 meters and the minimum distance to the neighbouring facility is 950 mm.

We recommend extreme caution when using this analogy, and think it is better to apply the Merkel model which has been proven and is used by the profession. The calculations are slightly more complex, and can be made with small programs or Excel macros.