Watt (W/m2 or Wm-2) – a metric unit of measurement of the intensity of radiation in watts over a square meter surface. One watt is equal to one joule of work per second.
How do you find W m2?
You can get this information by measuring the length and width of the room, multiply these measurements to get the total square meter. For multiple rooms, add the square meterage of each room to get an overall total.
How do you convert W m2 to joules?
» Watt/square meter Conversions:
W/m2↔J/(s. m2) 1 W/m2 = 1 J/(s. m2)
How do I convert watts to meters?
One watt is equal to 1 Newton-meter per second (Nm/s). You can multiply the amount of torque in Newton-meters by the rotational speed in order to find the power in watts.
What is W m2 used for?
Irradiance is the radiometry term for the power per unit area of electromagnetic radiation incident on a surface. The SI unit for irradiance is watts per square meter [W/m2], or milliwatts per square millimeter [mW/mm2].
What is the unit of heat flux?
Heat flux is defined as the amount of thermal energy radiated over a solid surface, and has the unit of W/m2.
What is W m 2 nm?
The spectral irradiance at any wavelength, Eλ, is in units of watts per square meter per nm (W m-2 nm-1). The value is a measure of the flux per nm at the specified wavelength incident normally onto an element of the surface divided by the area of the surface element in square meters.
How is UV intensity calculated?
How to Calculate UV-C Dose on a Surface
To get accurate dose data you need to start with a UV-C detector. UV Dose = UV Intensity (μW/cm² ) x Exposure Time (seconds)Exposure time is how long the UV light is ON and delivering UV to a surface. This value can be compared to the table below for various microorganisms.
How do you calculate solar irradiance?
The SI unit of irradiance is watts per square metre (W/m2 = Wm−2). The unit of insolation often used in the solar power industry is kilowatt hours per square metre (kWh/m2).
How many watts is a joule?
Watts (W) and Kilowatts (kW):
Watts are defined as 1 Watt = 1 Joule per second (1W = 1 J/s) which means that 1 kW = 1000 J/s.
How many watts are in a meter?
Equals: 1.00 watts (W) in power. Converting Newton metre per second to watts value in the power units scale.
How do I calculate power?
Power is equal to work divided by time.
In this example, P = 9000 J / 60 s = 150 W . You can also use our power calculator to find work – simply insert the values of power and time.
What watts mean?
A watt (W) is a unit of measurement of power. Watts therefore refer to the power of your device. Examples: an incandescent lamp has a power of 60 W. your microwave oven has a maximum power of 900 W.
What is Powerover area?
In physics, the intensity or flux of radiant energy is the power transferred per unit area, where the area is measured on the plane perpendicular to the direction of propagation of the energy. In the SI system, it has units watts per square metre (W/m2), or kg⋅s−3 in base units.
What is the irradiance of light?
Irradiance is the amount of light energy from one thing hitting a square meter of another each second. Photons that carry this energy have wavelengths from energetic X-rays and gamma rays to visible light to the infrared and radio.
What irradiance means?
Definition of irradiance
1 : radiance sense 1. 2 : the density of radiation incident on a given surface usually expressed in watts per square centimeter or square meter.
