Search results
Results from the WOW.Com Content Network
In mechanical engineering, mechanical efficiency is a dimensionless ratio that measures the efficiency of a mechanism or machine in transforming the power input to the device to power output. A machine is a mechanical linkage in which force is applied at one point, and the force does work moving a load at another point.
An electric induction motor is required to have a specified minimum full-load efficiency. A compact fluorescent lamp is required to start and run up to near full brightness in a given time, to have a minimum life of several thousand hours, to maintain its output within specified limits, to withstand a certain number of switchings, to have a ...
The wall-plug efficiency is the measure of output radiative-energy, in watts (joules per second), per total input electrical energy in watts. The output energy is usually measured in terms of absolute irradiance and the wall-plug efficiency is given as a percentage of the total input energy, with the inverse percentage representing the losses.
High static power relative to the maximum loaded power results in low dynamic range, poor energy proportionality, and thus, very low efficiency at low to medium utilizations. [ 1 ] [ 4 ] This can be acceptable for traditional high-performance computing systems and workloads, which try to extract the maximum utilization possible out of the ...
In the L-shaped cost curve, the long run cost would keep fixed with a significantly increased scale of output once the firm reaches the minimum efficient scale (MES). However, the average cost in an L-shaped curve may further decrease even though most economies of scale have been exploited when firms achieve the MES because of technical and ...
Improving operational efficiency begins with measuring it. Since operational efficiency is about the output to input ratio, it must be measured on both the input and output side. Quite often, company management is measuring primarily on the input side, e.g., the unit production cost or the man hours required to produce one unit.
If energy output and input are expressed in the same units, efficiency is a dimensionless number. [1] Where it is not customary or convenient to represent input and output energy in the same units, efficiency-like quantities have units associated with them. For example, the heat rate of a fossil fuel power plant may be expressed in BTU per ...
The operator's efficiency is measured as the time spent producing product divided by the time the operator is on duty. [2] For example: if an operator is assigned to run a CNC machine tool for seven hours, but they only have four hours' worth of continuous uninterrupted output of workpieces—their MOE rating is 57% (4 divided by 7) for this ...