The simplest formula is : Where P = Mechnical power in kW Q = flow rate in the pipe (m3/s) ρ = density (kg/m3) g = Acceleration of gravity (m/s²) H = waterfall height (m) η = global efficiency ratio (usually between 0,7 and 0,9) Calculator. Sample Power Density Calculation - Far Field (Refer to Section 3-5 for the definition of near field and far field) Calculate the power density at 100 feet for 100 watts transmitted through an antenna with a gain of 10.
You can define either a simple Gaussian beam or a Flat Top beam with a circular or rectangular profile.
In addition, for pulsed lasers it calculates energy density based on the repetition rate of the laser and average power or the pulse energy. You can define either a simple Gaussian beam or a Flat Top beam with a circular or rectangular profile.
The calculation of density is quite straightforward. However, it is important to pay special attention to the units used for density calculations. In the below online power density calculator, enter the given input values and click calculate button to find the power density.
Power density calculator: Power: W: Transmit power in watt: Gain: dBi: Antenna gain in dBi: Distance: m: Distance in meters: Value: V/m dBuV/m dBm/m2 - Calculates the field strength in a free field. Average acceleration is the object's … Given: P t = 100 watts G t = 10 (dimensionless ratio) R = 100 ft This equation produces power density in watts per square range unit. WPD (watts/m 2): Formula: WPD = ½ × Ï × V 3. It may overestimate the actual field strength of high-gain antennas in the near field (within several wavelengths of the …
As the names imply, a Gaussian beam has a profile with a power distribution that follows a gaussian function. Density of the air (Ï ) [in kg/m 3]: velocity (V) [in m/s]: Reset. In addition, for pulsed lasers it calculates energy density based on the repetition rate of the laser and average power or the pulse energy. How to calculate output power of a hydroelectric turbine? The calculation is only valid in the far field (depends on antenna size and wave length). Where, Ï = Density of the air, V = velocity, WPD = Wind Power Density ; Related Calculators Actuator Disk Efficiency Blade Solidity Coefficient of Lift of … This program is intended for approximate far-field calculations. There are many different ways to express density, and not using or converting into the proper units will result in an incorrect value. Please provide any two values to the fields below to calculate the third value in the density equation of The density of a material, typically denoted using the Greek symbol ρ, is defined as its mass per unit volume. It is useful to carefully write out whatever values are being worked with, including units, and … - Usually this calculation will be an approximation of the real field strength due to near field … It is useful to carefully write out whatever values are being worked with, including units, and perform dimensional analysis to ensure that the final result has units of Below is a table of units in which density is commonly expressed, as well as the densities of some common materials. An ideal Flat Top function has a profile with uniform power distribution across the entire beam, this is usually achieved with additional optics that modify a gaussian distribution.Between these two profiles there are an endless number of other profiles with unique power distributions. This means that the diameter of the beam is defined by the distance between the point in the profile where the power drops to ~13.5% of the peak power at the center of the beam 86.5% of the total power is confined within the diameter defined by this point.In order to work out the peak power density the rule of thumb is to take the total power of the beam This is the equivalent of calculating the power density of a Flat Top beam with the same diameter as the 1/e^2 diameter of the Gaussian and multiplying by two.The Ophir power density calculator returns the power density of a laser beam based on the above explanations.
The average power at the antenna: In watts The antenna gain in dBi: Enter 2.2 for dipoles; add 2.2 for antennas rated in dBd The distance to the area of interest: From the centre of the antenna, in feet The frequency of operation: In MHz Ground Reflection Effects In most cases, the ground reflection factor is needed to provide a … Here we relate only to Gaussian and Flat top profiles.The calculation of the power density of a Flat Top profile is straight forward. Antenna Power Input (P): [mW] Antenna Power Gain (G): Distance to Center of Radiation of Antenna (R): [cm] Power density (S): [mW/cm 2] Latest Calculator Release .
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