By Odd-Ivar Lekang

ISBN-10: 0470670851

ISBN-13: 9780470670859

As aquaculture keeps to develop at a speedy velocity, figuring out the engineering at the back of aquatic creation amenities is of accelerating significance for all these operating within the undefined. Aquaculture engineering calls for wisdom of the various common facets of engineering similar to fabric expertise, development layout and building, mechanical engineering, and environmental engineering. In this comprehensive ebook now in its moment version, writer Odd-Ivar Lekang introduces those ideas and demonstrates how such technical wisdom might be utilized to aquaculture systems.Review of the 1st variation: 'Fish farmers and different team of workers excited about the aquaculture undefined, providers to the fish farming company and architects and brands will locate this ebook a useful source. The booklet could be a big addition to the cabinets of all libraries in universities and study associations the place aquaculture, agriculture and environmental sciences are studied and taught.'Aquaculture Europe'A invaluable e-book that, optimistically, will motivate successors that attention extra on hot water aquaculture and on large-scale mariculture corresponding to tuna farming.'Cision

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Cavitation can happen if the suction head is too high. e. the boiling point of water is reduced). 3 mH2O) to 1 mH2O, water will boil at 46°C. This phenomenon can be observed when boiling water at high altitude, for instance in the Himalayas. 3 mH2O. Atmospheric pressure also depends on the weather. 12 Net positive suction head If the pump is not self-suctioning, the water level must be higher than the level of the pump. This means that the impeller needs a certain pressure to function optimally.

What is the new power supply? 22 A frequency transformer changes the ­frequency of the current and may therefore be used to regulate the pump speed. 9kW 3 Throttling By placing a throttle valve on the pressure side, it is possible to close the outlet of the pump (throttle) (Fig. 23). In this way an artificial head is created Water Transport 31 pumps of different sizes. In this way it is possible to couple pumps in and out and by doing this vary the total flow rate (parallel connection) and at the same time achieve an overall high efficiency for all the running pumps.

To use several pumps will also improve the reliability because one pump can stop without halting the total water flow to a farm. 23 Throttling on the pressure side may be used to reduce the water flow from a centrifugal pump, but is not a good solution. and hence a reduction in the water flow, according to the pump characteristics. Higher throttling results in a shift to the left on the pump curve. To throttle on the pressure side is only possible for centrifugal pumps, because the water is inhibited from going to the peripheries of the impeller.

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Aquaculture Engineering by Odd-Ivar Lekang

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