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Related Concept Videos

Electrical Energy01:10

Electrical Energy

1.6K
Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules.
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Reducing Line Loss01:18

Reducing Line Loss

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In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
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Production Efficiency01:01

Production Efficiency

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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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Energy Conservation and Bernoulli's Equation01:16

Energy Conservation and Bernoulli's Equation

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Applying the conservation of energy principle or the work-energy theorem to an incompressible, inviscid fluid in laminar, steady, irrotational flow leads to Bernoulli's equation. It states that the sum of the fluid pressure, potential, and kinetic energy per unit volume is constant along a streamline.
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...
7.2K
Energy Losses in Transformers01:21

Energy Losses in Transformers

1.6K
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be  the high resistance of the...
1.6K
Energy Budgets00:51

Energy Budgets

9.8K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
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Related Experiment Video

Updated: May 1, 2026

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
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Reducing theatre energy consumption.

Tom Pierce, Gemma Morris, Beena Parker

    Health Estate
    |April 5, 2014
    PubMed
    Summary

    This study measured the electrical energy for anesthesia, finding it costs approximately £2.24 daily. Significant energy savings are possible by optimizing anesthetic gas scavenging system (AGSS) pumps and radiant heaters.

    Area of Science:

    • Anesthesiology
    • Medical Engineering
    • Healthcare Sustainability

    Background:

    • Limited data exists on the electrical energy consumption of clinical anesthesia.
    • Understanding energy usage is crucial for sustainable healthcare practices.

    Purpose of the Study:

    • To quantify the total daily electrical energy consumption during clinical anesthesia.
    • To identify key equipment contributing to high energy use.
    • To propose energy-saving strategies in anesthesia delivery.

    Main Methods:

    • Utilized 'plug-in' power meters to measure direct electrical consumption.
    • Estimated energy use for equipment not directly metered, such as anesthetic gas scavenging system (AGSS) pumps.
    • Conducted direct observations in operating theaters to supplement measurements.

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    Main Results:

    • The total daily electrical energy consumption for anesthesia was measured at 28 kWh.
    • The daily cost of electrical energy for anesthesia was approximately £2.24.
    • Anesthetic gas scavenging system (AGSS) pumps and overhead radiant heaters were disproportionately high energy consumers.

    Conclusions:

    • Switching off AGSS out of hours can lead to significant energy savings.
    • Implementing thermostatic or timer controls for radiant heaters can reduce energy waste.
    • Optimizing energy use in anesthesia delivery contributes to more sustainable healthcare operations.