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Deep seawater lifting flow control method for air injection artificial upwelling

A flow control, deep seawater technology, used in marine ecology and marine engineering

Active Publication Date: 2016-01-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The object of the present invention is to aim at the deficiencies in the prior art of gas injection artificial upwelling, and provide a deep seawater lifting flow control method for gas injection artificial upwelling. The control method is simple, reliable, and easy to operate. can be applied

Method used

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  • Deep seawater lifting flow control method for air injection artificial upwelling
  • Deep seawater lifting flow control method for air injection artificial upwelling
  • Deep seawater lifting flow control method for air injection artificial upwelling

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Embodiment

[0090] (1) Geometric parameter h of surge tube u ,h d , D, nozzle immersion depth h 0 measured in advance. The vertical distribution of seawater density ρ(l) is measured by the temperature and salinity depth meter, as shown in figure 2 ;

[0091] (2) use the formula Calculate the Reynolds number R e , with the formula λ = 0.01227 + 0.7543 Re 0.38 = 0.01227 + 0.7543 ( 4 π D ν ) 0.38 Q w - 0.38 and Calculate friction coefficient λ and head loss coefficient k. use the formula h r ...

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Abstract

The invention discloses a deep seawater lifting flow control method for air injection artificial upwelling and belongs to the field of sea environment ecology and restoration. The air injection artificial upwelling is a function with respect to parameters of the geometric dimension of an upwelling tube, air injection volume flow, an air injection mode, and seawater density. The deep seawater lifting capacity is controlled by the adjustment of air injection capacity in order that the lifted seawater volume flow satisfies a preset requirement. A known quantity and an unknown quantity are contacted by means of an energy balance formula. Energy loss in every detail is fully considered. Not a complex partial differential equation is included in the whole formula. Thus, the calculating process of the control method is simple and reliable. In the case that sea density vertical distribution, water inlet depth, water outlet depth, and upwelling flow are known, the method gives reasonable air injection flow and builds an environment beneficial to the growth of algae.

Description

technical field [0001] The invention relates to the fields of marine engineering and marine ecology, in particular to a deep seawater lifting flow control method for gas injection artificial upwelling. technical background [0002] Major fish stocks around the world are at risk due to overfishing and environmental degradation. An estimated 75 percent of global commercial fish stocks are being overfished. Therefore, there is an urgent need to find a sustainable way to increase fish stocks through the development of technologies. [0003] Ninety percent of the organisms in the ocean live in the photic layer of the ocean. Because these photic layers lack nutrients, the primary productivity of phytoplankton, which is the lowest end of the marine food chain, is very low. However, the dark regions below two hundred meters in the ocean are richer in nutrients than the upper waters. [0004] Artificial upwelling research over the past few years has made it possible to lift deep s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D7/06
Inventor 樊炜徐驰骋强永发王奎潘依雯陈鹰
Owner ZHEJIANG UNIV
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