自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 14    No. 6    December 2007

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Concentrated and gastight sampling technique of deepsea microplankton
HUANG Zhong-hua(黄中华)1, LIU Shao-jun(刘少军)1, JIN Bo(金 波)2, LI Li(李 力)1, CHEN Ying(陈 鹰)2

1. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;2. National Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Abstract:A new sampling method of deepsea microplankton with function of in-situ concentrated sampling and gastight sampling was proposed. In-situ concentrated sampling technique was realized as follows: a microplankton membrane was used as filtration membrane, and a deepsea pump was used to pump seawater; the microplankton was captured and the density of microplankton was increased when seawater flow through the filtration membrane. Gastight sampling technique was realized as follows: a precharged accumulator was used as pressure compensator. During the process of lifting the sampler, the accumulator compensated the pressure drop continuously. The laboratory experimental results show that with in-situ concentrated sampling technique, in-situ concentrated sampling can be realized and the maximum concentration ratio reaches up to 500. With pressure compensation technique based on accumulator, gastight sampling can be realized. When sampling at 6 km and the precharge pressure of accumulator is 18 MPa, pressure drop of the sample is less than 2% compared with its original pressure. Deepsea experiment (at 1.9 km) results show that the sampler can realize in-situ concentrated sampling and gastight sampling.

 

Key words: sampler; concentrated sampling; gastight sampling; deepsea microplankton

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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