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An automated airlift system for open...

Rines, Eric.

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An automated airlift system for open ocean aquaculture.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	An automated airlift system for open ocean aquaculture./
作者:	Rines, Eric.
面頁冊數:	174 p.
附註:	Source: Masters Abstracts International, Volume: 54-05.
Contained By:	Masters Abstracts International54-05(E).
標題:	Ocean engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1591825
ISBN:	9781321838121

An automated airlift system for open ocean aquaculture.
Rines, Eric.

An automated airlift system for open ocean aquaculture. - 174 p.

Source: Masters Abstracts International, Volume: 54-05.

Thesis (M.S.)--University of New Hampshire, 2015.

Worldwide demand of seafood products is increasing the necessity for farmed protein. Farmed fish in particular, are raised in floating net-pens. These net-pens are being increasingly deployed in exposed marine environments. This is driving the need for deploying submersible cages to increase the survivability of stock and equipment. This research investigates the feasibility of an automated airlift system with automatic control for open ocean aquaculture net-pens. The system aims to simplify operation of the airlift, as well as reduce the number of surface connections. The system is actuated by valves controlling the pressure differential between a ballast chamber and the surrounding water, thus maintaining overall buoyancy by controlling the mass flux into and out of the chamber. The control system operates on ladder logic and allows the users to interact with it using a Human-Machine Interface system and an associated Graphical User Interface. Through prototype testing, it is determined that PID control is an effective means of controlling the airlift depth and the control hardware allows for precise depth set point values and real-time error and disturbance rejection.

ISBN: 9781321838121Subjects--Topical Terms:

660731
Ocean engineering.

An automated airlift system for open ocean aquaculture.
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520 $a Worldwide demand of seafood products is increasing the necessity for farmed protein. Farmed fish in particular, are raised in floating net-pens. These net-pens are being increasingly deployed in exposed marine environments. This is driving the need for deploying submersible cages to increase the survivability of stock and equipment. This research investigates the feasibility of an automated airlift system with automatic control for open ocean aquaculture net-pens. The system aims to simplify operation of the airlift, as well as reduce the number of surface connections. The system is actuated by valves controlling the pressure differential between a ballast chamber and the surrounding water, thus maintaining overall buoyancy by controlling the mass flux into and out of the chamber. The control system operates on ladder logic and allows the users to interact with it using a Human-Machine Interface system and an associated Graphical User Interface. Through prototype testing, it is determined that PID control is an effective means of controlling the airlift depth and the control hardware allows for precise depth set point values and real-time error and disturbance rejection.
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