I. Improved ice meltage in ice boxes; II. Temperature control in tents - winter phase.

ice meltage;ice boxes;temperature control;winter

Robert Beaman Duggan

University:University of Louisville

Department:Mechanical Engineering

关键词: ice meltage;    ice boxes;    temperature control;    winter;   

Others  :  https://ir.library.louisville.edu/cgi/viewcontent.cgi?article=4273&context=etd

美国|英语

来源: The Universite of Louisville's Institutional Repository

【 摘 要 】

This thesis consists of two parts: Improved Ice Meltage in Ice Boxes; Temperature Control in Tents - Winter Phase. Improved ice meltage in the Progress refrigerator is discussed in the first part of the thesis. This portion of the work shows that satisfactory refrigerator temperatures and flat ice meltage could not be obtained simultaneously when using V-shaped ice racks, although they could be obtained separately; however, the basket-type chamber offers greater possibilities of obtaining proper temperatures and meltage characteristics. Series of tests are discussed and conclusions drawn from the results. In the second part of the thesis, a method of treating data obtained in the transfer of heat into and from military tents was developed and applied to the experimental data. A study was made of large wall tents, using as insulators the following types of liners: 3.6 oz. cotton, 2 layers of cloth; 4 oz. cotton, 2 layers of cloth, inner fabric - dark green, vinyl-coated; 4 oz. cotton, white, 3 layers of cloth. Measurements were made of tent air and fabric temperatures under constant heat input conditions, and overall heat transfer coefficients were calculated for a comparison of the insulating values of the liners.