Could You Have A Device With An Efficiency Of Greater Than 100

More Answers On Could You Have A Device With An Efficiency Of Greater Than 100

Is it possible to achieve efficiency more than 100%? – Quora

Depending on how you measure efficiency, yes. Case in point: heat pumps operating at typical temperate winter temperatures (maybe 5-10 degrees C) require ~1 Joule to add ~3 Joules of heat to a building. So you get 300% efficiency if you measure efficiency as 100* (Energy Out / Energy In).

Can a heat pump have efficiency greater than 100%?

The efficiency of a heat engine is the work output divided by the gross heat input, or e = W O U T Q H It’s efficiency is always less than 1. An efficiency of more than 1 violates the first law of thermodynamics (conservation of energy). The second law limits the maximum efficiency to 1 − T L T H

How can a device be more than 100% efficient? – reddit

While an electric resistive heater cannot exceed 100% efficient, heat pumps routinely exceed this figure as they are moving ambient heat from the (chilly) environment into the house. 2 level 1 barnaby-jones · 10y There’s a request for the article in r/scholar.

Can a machine be more than 100 percent efficient? – Answers

100% efficiency would mean that the machine is able to transform energy from one form into another without any loss of energy from the system in the process. For it to have greater than 100%…

Efficiency – Efficiency – Edexcel – GCSE Physics (Single Science … – BBC

Increasing efficiency – Higher It is not possible to have an efficiency of greater than 1 or an efficiency percentage greater than 100%. This would mean that more energy is being transferred than…

Why Can’t a Machine Be 100 Percent Efficient? – Reference.com

The short answer is: It can’t. Almost all machines require energy to offset the effects of gravity, friction, and air/wind resistance. Thus, no machine can continually operate at 100 percent efficiency. Definition of Efficiency To get a better idea of how machine efficiency is determined, let’s look at a working definition and an example below.

Is there any law that states something cannot have 100% efficiency?

All you have to do to attain 100% efficiency is to: Get a 1W electric motor. And, Get a generator that generates 1W of electricity @ 1,000 RPM. Next and last, of course, is to connect the motor shaft directly up to the generator shaft, then get a drill or something to spin the common shaft to 1,000 RPM, and voila!

Why can no machine be 100% efficient? + Example – Socratic

This tendency of systems to lose energy is called entropy. Entropy in a closed system never goes down. Systems always tend toward a state of decreasing order unless more energy is provided into the system to counteract this tendency. That is why 100% efficiency in machines shall not be possible. Answer link

Is it okay to use a power supply that provides slightly more voltage …

This doesn’t mean your device will consume 3.42 A when its powered with this adapter; it is only an indication of the maximum current that can be drawn through the adapter by any device that it is connected to, above which the adapter gets damaged. Any device will only draw as much current as it needs, so long as its power source can supply it.

Is it really OK to supply more current than what the component is rated …

It is usually okay to have a supply which can output more current than devices expect, but some kinds of devices are only suitable for devices which have current limits. If a typical 0.25A fuse is fed by a supply that will current limit at 10A, for example, and its output is shorted, the fuse will interrupt the current.

Chapter 14 Physical Science Flashcards – Quizlet

Because the output force is greater than the input force, the input distance must be greater than the output distance. … Why can no machine be 100% efficient? Always Friction. … You have just designed a machine that uses 1000J of work from a motor for ever 800J of useful work the machine supplies. What is the efficiency of your machine?

How to Increase Efficiency of Machines? Know about Machine Health …

IDE (Industrial data enabler) is a compact, portable, battery-operated handheld device for productivity optimization and automated predictive maintenance in the industry. Through IoT (Internet of Things), it detects anomalies and defects in real time through on-board LED indicators and warns an operator immediately. It can:

LED’s efficiency exceeds 100% – Phys.org

LED’s efficiency exceeds 100% by Lisa Zyga , Phys.org An LED’s power conversion (wall-plug) efficiency varies inversely with its optical output power. Wall-plug efficiency can exceed 100%, the…

Efficiency – Work, power and efficiency – AQA – BBC Bitesize

It is not possible to have an efficiency of greater than 1 or efficiency percentage of 100%. This would mean that more energy is being transferred than is being supplied, which would mean that…

3 Examples of Machine Efficiency – Simplicable

the productivity efficiency of machines can be calculated with the dollar cost of inputs and dollar value of outputs.efficiency = (output / input) * 100 for example, a machine in a job shop requires inputs of $400 an hour that produces parts with a value of $600:efficiency = (600/400) * 100 = 150%a machine with productive efficiency over 100% …

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important messages. First, the efficiency of an energy conversion device is a quantitatively unitless (or dimensionless) number between 0 and 1 (or between 0 and 100%). Obviously, the larger this number is, the higher the efficiency of the device will be; however, a number greater than one would contradict the First Law of Thermodynamics.

PHYS EXAM 2 Flashcards – Quizlet

-no heat engine can have an efficiency greater than 30%. … -No energy converter is 100% efficient.-Yes, you can do this!-Motors require AC and generators produce DC. … is a theoretical device that is not useful in practice.-A heat pump is more efficient when the outside temperature is colder.

Energy conversion efficiency – Wikipedia

Generally, energy conversion efficiency is a dimensionless number between 0 and 1.0, or 0% to 100%. Efficiencies may not exceed 100%, e.g., for a perpetual motion machine. However, other effectiveness measures that can exceed 1.0 are used for heat pumps and other devices that move heat rather than convert it.

Understanding COP: Coefficient Of Performance Of Heat Pumps

OK, let’s calculate the maximal theoretical efficiency of a cooling device. Namely, an air conditioner or a refrigerator. By applying the 1st law of thermodynamics, we can deduce the ‘Carnot COP’ for a cooling device is calculated as such: COP cooling = T cold /(T hot-T cold) T cold is the chill temperature you want to have in your room …

Quantum efficiency – Wikipedia

Note that in the event of multiple exciton generation (MEG), quantum efficiencies of greater than 100% may be achieved since the incident photons have more than twice the band gap energy and can create two or more electron-hole pairs per incident photon. Types Two types of quantum efficiency of a solar cell are often considered:

How efficient is an electric heater? – Physics Stack Exchange

The efficiency is 100%, which is considered a poor heating efficiency. It is 100% because all light, motion, etc produced by the heater at some point becomes dissipated to heat. Same heating efficiency have all other completely-in-door devices: heating with a TV set is as efficient as an electric heater. However, there is a better way to heat.

The Carnot Efficiency | EGEE 102: Energy Conservation and Environmental …

Step 2. Determine the efficiency using the Carnot efficiency formula: . η = [ 1 − T c o l d T h o t] × 100 % η = [ 1 − 293. . K 813. . K] × 100 % = 64 %. From the Carnot Efficiency formula, it can be inferred that a maximum of 64% of the fuel energy can go to generation.

Headphone Impedance Demystified: Do I Need a Headphone Amp?

Impedance Matching. Impedance matching is the interaction between the source impedance (the device the headphone is attached to) and the headphone impedance. To ensure the highest audio quality, the source and the headphones must pair well. As you may have guessed from the impedance range examples above, a match doesn’t mean ‘both the same’ but rather that they are ‘complementary.’

Efficiency Formula – Softschools.com

Answer: The efficiency can be found using the formula: η = 0.40 x 100%. η = 40%. The efficiency of the hammer strike was 40%. Vibrations and heating of the nail are two possible reasons for the energy loss. 2) A particular chemical process has an energy efficiency of only 3.00%. To complete this large-scale chemical process, 140,000 J of …

What is Thermal Efficiency – Definition

The thermal efficiency, ηth, represents the fraction of heat, QH, that is converted to work. It is a dimensionless performance measure of a heat engine that uses thermal energy, such as a steam turbine, an internal combustion engine, or a refrigerator. For a refrigeration or heat pumps, thermal efficiency indicates the extent to which the …

Is It Safe to Use a Higher Wattage Power Supply in My Computer?

Power supplies are rated by the maximum amount of power they can deliver. That means a power supply rated for 520 watts can supply more electrical power than one rated for 300 watts. That’s more electrical power. It won’t make your computer run faster or give you more “computational” power — this is only about the electricity required …

Screw efficiency calculator – cosmoetica.it

The highest isentropic efficiency currently published is about 92% and the lowest about 50%. · 2,500kW / 460kW = The constraint force in the lead screw is measured and used to calculate the friction torque within the lead screw. 8 shows that the greater the angle of the screw thread, the better the efficiency of a Lead Screw system. 875″. 5% …

3 Examples of Machine Efficiency – Simplicable

The productivity efficiency of machines can be calculated with the dollar cost of inputs and dollar value of outputs.Efficiency = (output / input) * 100 For example, a machine in a job shop requires inputs of $400 an hour that produces parts with a value of $600:Efficiency = (600/400) * 100 = 150%A machine with productive efficiency over 100% …

Efficiency Formula – Softschools.com

Answer: The efficiency can be found using the formula: η = 0.40 x 100%. η = 40%. The efficiency of the hammer strike was 40%. Vibrations and heating of the nail are two possible reasons for the energy loss. 2) A particular chemical process has an energy efficiency of only 3.00%. To complete this large-scale chemical process, 140,000 J of …

Transformer Efficiency, Losses and Heat

Efficiency, Losses and Heat. An ideal transformer would have no losses, and would therefore be 100% efficient. In practice energy is dissipated due both to the resistance of the windings (known as load loss), and to magnetic effects primarily attributable to the core (known as iron loss). Transformers are in general highly efficient, and large …