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Related Concept Videos

Regulation of Water Output01:26

Regulation of Water Output

The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
Refrigerators and Heat Pumps01:07

Refrigerators and Heat Pumps

Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from the...
Energy Losses in Transformers01:21

Energy Losses in Transformers

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.
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The first cause can be  the high resistance of the copper windings...
Generator Voltage Control01:21

Generator Voltage Control

Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand, use...
Joule-Thomson Effect01:21

Joule-Thomson Effect

The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
Heating and Cooling Curves02:44

Heating and Cooling Curves

When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
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Related Experiment Video

Updated: Jul 1, 2026

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
09:04

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

Reverse Tesla valve modulated efficient water evaporation and cooling.

Wensheng Wang1,2,3, Shouwei Gao4, Han Wu1

  • 1Province Key Laboratory of Forestry Intelligent Equipment Engineering, College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, People's Republic of China.

Nature Communications
|June 29, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel bulk-effect evaporation system (BEES) inspired by the reverse Tesla valve. BEES significantly enhances evaporation rates for applications like solar steam generation and water harvesting.

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Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
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Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

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Last Updated: Jul 1, 2026

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
09:04

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
07:18

Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

Published on: October 18, 2017

Area of Science:

  • Engineering
  • Thermodynamics
  • Fluid Dynamics

Background:

  • Water evaporation is crucial for natural cycles but limited in industrial applications.
  • Conventional evaporators face challenges with boundary layer resistance, hindering efficiency.
  • Existing methods struggle to meet demands in solar steam generation and evaporative cooling.

Purpose of the Study:

  • To overcome rate limitations in industrial water evaporation.
  • To develop a novel system for enhanced evaporation dynamics.
  • To address the water-energy nexus through improved evaporation technology.

Main Methods:

  • Reinventing Nikola Tesla's fluidic diode into a bulk-effect evaporation system (BEES).
  • Utilizing a reverse Tesla valve mechanism for modulated bulk-effect evaporation.
  • Leveraging structure-induced vortex airflow to disrupt boundary layers.

Main Results:

  • Achieved an evaporation rate of 21.29 kg m⁻² h⁻¹.
  • Reached a total energy/solar efficiency of 627%.
  • Demonstrated potential for all-day freshwater harvesting and efficient evaporative cooling with significant energy savings (414 GJ m⁻³ month⁻¹).

Conclusions:

  • BEES establishes a new bulk-effect evaporation framework.
  • This approach complements traditional interfacial engineering.
  • The system offers a viable solution for the water-energy nexus.