natural circulation


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natural circulation

The circulation of air or water due to differences in density rather than to the actions of a pump or blower.
References in periodicals archive ?
Now this steam, being lesser dense (creating natural circulation of steam-water in the system), rises up to the top header and gets to the Boiler Shell.
The CRP will highlight comparison of reliability and performance assessment methods for key safety issues on water-cooled SMRs, including: (1) separation and independence of reactor trip and safety system actuation logics; (2) diversity and redundancy for depressurizing the reactor coolant pressure boundary to facilitate safety injection during a high pressure transient; (3) diversity and redundancy of core cooling; (4) options and approaches for assuring containment structural integrity; and (5) the use of natural circulation for primary core heat removal.
With its walls, floors and frame made from Yoshino cypress, the observatory took the form of a giant breathing tree using the mechanism of natural circulation.
We long to re-engage with the always-present biorhythms and natural circulation of the body's intelligent and intricate energies that have sustained our race for millennia.
To overcome this obstacle, a German firm has developed what it calls the Underwater Nozzle Pipelines (UNP) method as an alternative: lime mixed with lake water is pumped from the nozzles of pipes floating in the lake, using the lake's natural circulation pattern to thoroughly blend and distribute the suspension evenly throughout.
In response to this effect, the Ministry of Environment has developed a Biotope Area Ratio (BAR) as a quantitative planning indicator in the control of natural circulation functions.
Natural circulation, coolant flow residual heat removal, and emergency core cooling systems powered by natural forces--gravity.
They can employ a large set of passive systems, utilising natural circulation rather than pumps, which are always at risk of failure.
It consist of five thermal units, 10 desalination units, five heavy-fuel oil-based natural circulation, radiant type boilers with a design steam output capacity of 605 t/hr of steam per boiler and a heavy fuel oil consumption of 38.
Some topics for the water management and engineering section: flow patterns under natural circulation in a narrow rectangular channel, watershed water resources management, and frost resistance properties of mixed aggregate concrete with mineral admixtures.
The boiler is a combination of water tube and fire tube design, natural circulation, balanced draft unit, suitable for indoor installation and is provided with atmospheric fluidized bed furnace to burn the coal.
The hotel's spa -- The Villa Spa --provides various programmes and packages such as the Manual Lymphatic Drainage (MLD), a gentle massage that is intended to encourage the natural circulation of the lymp through the body.