What is Utilisation factor in lighting?
1) UTILIZATION FACTOR: It may be defined as “the ratio of total lumens received on the working plane to the total lumens emitted by the light source”. i.e. Utilization factor =Lumens received on the working plane/Lumens emitted by the lamp.
What is room index as used in illumination?
The room index is a number that describes the ratios of the rooms length, width and height.
How do you calculate utilization factor in illumination?
Utilization Factor is Proportion of light reaching working plane to the light output of lamps. UF = Lumens received on Working Plan / Lumens output of luminaires. The lighting manufacturers’ catalogues give Utilization Factors for standard conditions.
How do you calculate utilization factor?
Utilization Factor = The time that a equipment is in use./ The total time that it could be in use. Example: The motor may only be used for eight hours a day, 50 weeks a year. The hours of operation would then be 2000 hours, and the motor Utilization factor for a base of 8760 hours per year would be 2000/8760 = 22.83%.
What is the value of Utilisation factor?
The utilization factor or use factor is the ratio of the time that a piece of equipment is in use to the total time that it could be in use. It is often averaged over time in the definition such that the ratio becomes the amount of energy used divided by the maximum possible to be used.
What do you mean by maintenance factor?
Maintenance factor refers to the loss of light that occurs over time and is also known as loss factor. During the operating time of light sources, there can be a slight decrease of light output in other words lumen. In addition of this, pollution of light sources can also cause decreasing of light output.
What is meant by utilization factor?
Definition of utilization factor : the ratio of the maximum demand on a generator or generating station to the capacity of the generators.
What is utilization factor and depreciation factor in illumination?
Depreciation Factor (p) p = depreciation or maintenance factor; η = utilization factor. The size of the lamp depends on the number of fittings which, if uniform distribution is required, should not be far apart.
How is illumination calculated in a room?
To determine the needed lumens, you will need to multiply your room square footage by your room foot-candle requirement. For example, a 100 square foot living room, which needs 10-20 foot-candles, will need 1,000-2,000 lumens. A 100 square foot dining room, which needs 30-40 foot-candles, will need 3,000-4,000 lumens.
What is meant by Utilisation factor?
What is the formula for utilization?
The basic formula is pretty simple: it’s the number of billable hours divided by the total number of available hours (x 100). So, if an employee billed for 32 hours from a 40-hour week, they would have a utilization rate of 80%.
What is the example of utilization?
Utilization is a fancy way of saying “use.” A team’s utilization of a gym for practices might need to continue until it stops raining.