Data

Natural Freeze-drying of Water-degraded Timber Structures: Feasibility Study

Australian Antarctic Data Centre
AMBROSE, WALLACE
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.4225/15/55ED1B3E444FB&rft.title=Natural Freeze-drying of Water-degraded Timber Structures: Feasibility Study&rft.identifier=10.4225/15/55ED1B3E444FB&rft.publisher=Australian Antarctic Data Centre&rft.description=The objectives of this project were: To gather data from a small scale experimental freeze-drying unit, using natural local conditions, with a view to extending the experiment to a larger scale installation sufficient to deal with timbers from archaeological shipwrecks and other timber constructions. The climate of the Vestfold Hills at Davis Base is exceptionally dry and, apart from a short summer period, the temperature is below freezing. The dryness and the low temperature of the area makes it a theoretically ideal location to naturally freeze-dry large water-logged wooden items. A small 2m3 container housing a selection of waterlogged wood has been installed below ground level. Water vapour from the frozen samples is extracted by a wind driven venturi system. Changes in temperature, sample weight, and air pressure are logged and the data are transferred regularly to Canberra. The fields in this dataset are: Date Time Temperature Atmospheric Pressure Ice Weight Wood Weight Windspeed&rft.creator=AMBROSE, WALLACE &rft.date=2000&rft.coverage=northlimit=-68.0; southlimit=-68.0; westlimit=72.0; eastLimit=72.0; projection=WGS84&rft.coverage=northlimit=-68.0; southlimit=-68.0; westlimit=72.0; eastLimit=72.0; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_156 when using these data.&rft_subject=structure&rft_subject=BUILDINGS&rft_subject=EARTH SCIENCE&rft_subject=HUMAN DIMENSIONS&rft_subject=INFRASTRUCTURE&rft_subject=ARTEFACTS&rft_subject=DATE&rft_subject=FREEZE-DRYING&rft_subject=ICE WEIGHT&rft_subject=PRESERVATION&rft_subject=TEMPERATURE&rft_subject=TIME&rft_subject=VENTILATION&rft_subject=VENTURI&rft_subject=WINDSPEED&rft_subject=WOOD WEIGHT&rft_subject=ANEMOMETERS&rft_subject=HUMIDITY SENSORS&rft_subject=TEMPERATURE SENSORS&rft_subject=ANEROID PRESSURE SENSOR&rft_subject=CONTINENT > ANTARCTICA > Davis&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_156 when using these data.

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Brief description

The objectives of this project were:

To gather data from a small scale experimental freeze-drying unit, using natural local conditions, with a view to extending the experiment to a larger scale installation sufficient to deal with timbers from archaeological shipwrecks and other timber constructions. The climate of the Vestfold Hills at Davis Base is exceptionally dry and, apart from a short summer period, the temperature is below freezing. The dryness and the low temperature of the area makes it a theoretically ideal location to naturally freeze-dry large water-logged wooden items. A small 2m3 container housing a selection of waterlogged wood has been installed below ground level. Water vapour from the frozen samples is extracted by a wind driven venturi system. Changes in temperature, sample weight, and air pressure are logged and the data are transferred regularly to Canberra.

The fields in this dataset are:

Date
Time
Temperature
Atmospheric Pressure
Ice Weight
Wood Weight
Windspeed

Issued: 2000-07-19

Data time period: 1990-12-12 to 1993-02-02

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72,-68

72,-68

text: northlimit=-68.0; southlimit=-68.0; westlimit=72.0; eastLimit=72.0; projection=WGS84

Subjects
ANEMOMETERS | ANEROID PRESSURE SENSOR | ARTEFACTS | BUILDINGS | CONTINENT > ANTARCTICA > Davis | DATE | EARTH SCIENCE | FREEZE-DRYING | GEOGRAPHIC REGION > POLAR | HUMAN DIMENSIONS | HUMIDITY SENSORS | ICE WEIGHT | INFRASTRUCTURE | PRESERVATION | TEMPERATURE | TEMPERATURE SENSORS | TIME | VENTILATION | VENTURI | WINDSPEED | WOOD WEIGHT | structure |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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