This question relates to the economic decisions that electricity utilities make in designing their power networks. During peak load periods, power is transmitted at the maximum current that is safe for the network, but at other times power transmission simply depends on demand.
Ideally, utilities would transmit power at maximum efficiency because, by minimising losses over the lines and in Transformers, they minimise generation costs. However, each increase in efficiency results in increased capital costs. A compromise is always made between purchasing efficient power transformers and distribution transformers or less expensive ones with higher losses.
the efficiency is maximum in a transformer when no load loss is equal to load loss.
The condition for maximum efficiency of a d.c. machine is that VARIABLE LOSSES must be equal to CONSTANT LOSSES i.e., variable losses = constant losses..
50%
Efficiency drops with added turns. Maximum efficiency is about 80% with a 3-4 turn helical and drops to about 60% at 12 turns.
generally rating means the condition when the machine can give maximum efficiency without being overheated .In transformers and generators it is decided by core as well as copper loss(flux proportional to supply voltage,current proportional to copper loss).so both are rated in kVA whereas motors are rated as maximum output they can deliver i.e kW.
the efficiency is maximum in a transformer when no load loss is equal to load loss.
This question relates to the economic decisions that electricity utilities make in designing their power networks. During peak load periods, power is transmitted at the maximum current that is safe for the network, but at other times power transmission simply depends on demand. Ideally, utilities would transmit power at maximum efficiency because, by minimising losses over the lines and in Transformers, they minimise generation costs. However, each increase in efficiency results in increased capital costs. A compromise is always made between purchasing efficient power transformers and distribution transformers or less expensive ones with higher losses.
It is always desirable to run any equipment or device at maximum efficiency for that matter, not only the power transformer. Power transformer maximum efficiency occurs when copper loss is equal to iron loss. (or no load loss equals to load loss). This does not necessariliy mean that maximum efficiency occurs at maximum or full load. Generally the maximum efficiency occurs at relatively less than full load of the transformer.
It is maximum at about 75% to 100% of the motor rated load. Efficiency is maximum at unity power factor , when R=X and when variable losses Is equal to constant losses at rated load.
The maximum efficiency condition in distribution transformer is said to be occurred when iron loss = copper loss
Efficiency is typically calculated as the ratio of actual output to maximum possible output, expressed as a percentage. The formula for efficiency is: Efficiency = (Actual output / Maximum possible output) * 100%.
78%
thermal
50%
The optimal concentration of nm for achieving maximum efficiency in the experiment is 10 nanomolar (nm).
node speed
The efficiency of the Otto cycle is given by the formula: Efficiency 1 - (1 / compression ratio)(-1), where is the specific heat ratio. To optimize the efficiency of the Otto cycle for maximum efficiency, you can increase the compression ratio, improve combustion efficiency, reduce heat losses, and use higher octane fuel.