Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Deep Seawater Uplift Flow Control Method for Gas Injection Artificial Upwelling

A flow control, deep seawater technology, applied in the fields of marine ecology and marine engineering, to achieve the effects of a wide range of uses, an accurate flow enhancement method, and a simple and reliable calculation process

Active Publication Date: 2018-02-09
ZHEJIANG UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Deep Seawater Uplift Flow Control Method for Gas Injection Artificial Upwelling
  • A Deep Seawater Uplift Flow Control Method for Gas Injection Artificial Upwelling
  • A Deep Seawater Uplift Flow Control Method for Gas Injection Artificial Upwelling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0094] (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 ;

[0095] (2) use the formula Calculate the Reynolds number R e , with the formula

[0096] with Calculate friction coefficient λ and head loss coefficient k. use the formula Calculation of sea level rise h at the nozzle r ;

[0097] (3) Assuming a desired deep seawater lift Q w ;

[0098] (4) Through the energy balance formula E i =E o +E k +E ru +E rd +E l +E e +E rise +E s get Q w and Q a Relational expression (14), that is, the volume flow rate Q of the pre-set gas injection air a To get the assumed seawater lift Q w ,Such as image 3 middle curve.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com