해수취수시설에서 이중관 구조를 갖는 취수관 연구(I): 수리모형실험

Abstract

The current small and medium seawater intake facilities have significant problems due to suspended solids, unstable intake and maintenance, etc. A double pipe structure and underground type seawater intake system is being developed to overcome the existing weaknesses and an experimental model test was conducted to verify the proper intake discharge for the double pipe type intake pipe. In order to examine the design parameter of the intake pipe, we have examined the intake discharge according to the length of intake pipe, perforated ratio and water depth change using the experimental modeling test with/without the intake pump. From the result of experiment for the forced water intake with the intake pump, the intake discharge was not sensitive to with/without filtered sand layer and length of intake pipe. The double type intake pipe did not decrease the intake efficiency. Therefore, when the length of the double pipe type intake pipe model was about 1m(prototype 10m), it was possible to take the intake discharge supply without degradation in the water intake efficiency. In the pressure head without the intake pump, the intake discharge was affected by water depth as the length of intake pipe is short and the perforated ratio is low. From the results, the length of intake pipe must be design more than minimum of 1 m(prototype 10 m). In order to secure stable intake discharge, the perforated ratio must be established more than 359%.