1995 Fiscal Year Final Research Report Summary
Development of an air conditioning pre-filter suitable for volcanic regions
| Project/Area Number |
06555173
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Architectural environment/equipment
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| Research Institution | Kagoshima University |
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Principal Investigator |
AKASAKA Hiroshi Kagoshima Univ, Fac.of Engineering, Professor, 工学部, 教授 (20094112)
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| Co-Investigator(Kenkyū-buntansha) |
OSHIRO Masatoyo TAIKISYA,Co., Ltd, Researsher, 技術研究所, 研究員
NAKAJIMA Masahiro Kagoshima Institute of Techinolog Associate Professor, 助教授 (70124170)
IWASHITA Go Kagoshima Univ, Fac.of Engineering, Associate Professor, 工学部, 助教授 (90253905)
KUROKI Soichiro Kagoshima Univ, Fac.of Engineering, Associate Professor, 工学部, 助教授 (30094139)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Air-conditioning system / Volcanic ash / Dust removal apparatus / Pressure Loss / Performance |
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| Research Abstract |
Two kinds of trial air filters are producted and the performances of them are experimentally examined. First, trial filters, designed on the theory of inertial dust collection, are produced. Ash collection coefficients are examined using volcanic ash collected from several places around Sakurajima. The overall ash collection coefficients are between 70% to 90% for eliminators with grooves, 65% to 85% for eliminators without grooves, when the air velocity is less than 4m/s. The partial ash collection coefficients, corresponding to the ash diameter regions 0-75,75-125,125-250,250-500 are 22%, 75%, 98% and 100%, respectively, when the air velocity is 3m/s. It is verified that the overall ash collection coefficients synthesized from the partial collection coefficients are similar to those measurements. Next, the efficiency of a wet type ash filter is examined. The ash collection coefficient by this filter is more than 97%. However, as wet ash gradually sticks on the eliminator with water spraying, which will eventually require the maintenance, it can only be recommended to use in the restricted area where the influence of ash is remarkable.
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