They rely on the supply of external energy into the reservoir in the form of injecting fluids to increase reservoir pressure, hence replacing or increasing the natural reservoir drive with an artificial drive.

Zhang Heng was the first in China to add an extra compensating tank between the reservoir and the inflow vessel, which solved the problem of the falling pressure head in the reservoir tank.

Implementing water protection measures to minimize radionuclide seepage into Kiev reservoir through watercourses

The reservoir must also be permeable so that the hydrocarbons will flow to surface during production.

The Sobradinho reservoir is one of the largest artificial lakes in the world, with an area of .

The Navy water source is a surface reservoir (Fena Lake) in the southern part of the island.

Neither the source of the outbreak nor the reservoir where the virus hides between outbreaks is known.

In the northern city of Korhogo, the supply reservoir is nearly dry, causing an acute water shortage.

Because there's no oxygen there, it's the largest reservoir of hydrogen sulfide on Earth. Shipwrecks are perfectly preserved.

Sometimes an existing mill pond or other artificial reservoir is available and can be adapted for power production.

It normally works by admitting water from a cold water reservoir into a flexible hose in the base of the reservoir leading directly to a thin metal tube or heating chamber (usually, of aluminum), where a heating element surrounding the metal tube heats the water.

Today s Russia is a gigantic reservoir of raw materials, and its economy relies heavily on commodities mining and drilling.

Sound pressure level Sound pressure is the difference, in a given medium, between average local pressure and the pressure in the sound wave.

The pressure gradient between this region and the ambient pressure will propel matter toward the low pressure area.

The reservoir volume is about equivalent to the annual flow of the Nile at the Sudanese Egyptian border (65.5 billion cubic meter).

Reservoirs By far the largest reservoir of Earth's oxygen is within the silicate and oxide minerals of the crust and mantle (99.5 ).

These include natural water displacing oil downward into the well, expansion of the natural gas at the top of the reservoir, expansion of gas initially dissolved in the crude oil, and gravity drainage resulting from the movement of oil within the reservoir from the upper to the lower parts where the wells are located.

This area, which contains perhaps the largest reservoir of biodiversity left on earth, is exploited by many countries, but managed by no one.

The airspeed is derived from the difference between the ram air pressure from the pitot tube, or stagnation pressure, and the static pressure.

Measurement and units Vapor pressure is measured in the standard units of pressure.

Diplomatic pressure needed

For a vapor bubble to expand, the temperature must be high enough that the vapor pressure exceeds the ambient pressure (the atmospheric pressure, primarily).

Second, the costs of the insurance premium the outsize, largely dollar denominated reservoir of China s foreign exchange reserves have been magnified by political risk.

Domestic pressure could very well bring down the regime, but international pressure will not.

Compressed air is air kept under a pressure that is greater than atmospheric pressure.

With a large reservoir of surplus savings and a budget deficit of less than 2 of GDP, it has the wherewithal to fund such efforts.

The complex was relocated in its entirety in 1968, on an artificial hill made from a domed structure, high above the Aswan High Dam reservoir.

Egypt fears a temporary reduction of water availability due to the filling of the dam and a permanent reduction because of evaporation from the reservoir.

Clean water is trucked from a central reservoir outside the capital and sold to individual households and businesses at 5 to 10 cents per gallon.

Dania felt the pressure.

Social pressure for release?

Popular pressure is growing

formula_4Where formula_5 is dynamic pressure.

gas pressure bottles, and

The force pushing the water towards the low pressure region is called the pressure gradient force.

A back pressure valve on the gas outlet to maintain a steady pressure in the vessel.

A typical oilfield yields only 20 of the reservoir, with close to 63 remaining buried in the earth even when the most advanced technologies are used.

He reacted to moral shabbiness with revulsion, but also with fear. He saw it as a source of disposable masses, a human reservoir for totalitarian movements.

Lake Powell is a reservoir on the Colorado River, straddling the border between Utah and Arizona (most of it, along with Rainbow Bridge, is in Utah).

Peer pressure now matters, too.

Applying pressure won't be easy.

Reducing demographic pressure on forests.

Indeed, both Hollande and Sarkozy represented those adapted to globalization and viewed the rest as a reservoir of voters to be seduced, not as a new underclass.

The exhaust pressure is controlled by a regulating valve to suit the needs of the process steam pressure.

At the elevated pressure in the bottle, more carbon dioxide can dissolve in water than at atmospheric pressure.