Air tightness measurement and numerical simulation in the micro environment in Han Yang Mausoleum Museum

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Air tightness measurement and numerical simulation in the micro environment in Han Yang Mausoleum Museum

 

Author: Cao, Nanying
Title: Air tightness measurement and numerical simulation in the micro environment in Han Yang Mausoleum Museum
Degree: M.Sc.
Year: 2010
Subject: Hong Kong Polytechnic University -- Dissertations
Indoor air quality
Tombs -- Conservation and restoration -- China -- Shaanxi Sheng
Department: Dept. of Civil and Structural Engineering
Pages: ix, 60 leaves : ill. ; 30 cm.
InnoPac Record: http://library.polyu.edu.hk/record=b2360437
URI: http://theses.lib.polyu.edu.hk/handle/200/5992
Abstract: As the first underground museum, Han Yang Mausoleum museum adopts whole sealing glass system to protect relics from destruction while providing visitors a wonderful environment to enjoy the fantastic artwork closely at different angles. But from its open, this method cannot stop relics from destruction and weathering by covering the surface with crystalloid salt. Following the problems, this study measured air tightness of the display hall with tracer gas concentration decay method and simulated its micro environment including temperature, air movement and relative humidity numerically via CFD software Fluent. In this study, the display hall shows better good tightness with 0.04h⁻¹ air change rate which provides relic preservation a great environment like reducing the pollutants concentration level from exchange but it cannot prevent the pollutant gases penetrating into the display hall. Unstable is the air change rate affected by outside climate conditions and not uniform is it in the whole space. The more times opening the door, the bigger the air change rate. The suggested solution is reducing the times of staff coming in and out. After simulation under the actual heating system. micro-environment did not perform perfectly as expected: Four gas cyclones are found; there are trends that temperature is getting lower from one side to another while relative humidity is in the opposite situation especially at low height near the ground. After estimating the given suggested case, relative humidity distribution is even worse therefore suggested case should not be adopted.

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