Publication Date


Document Type


First Advisor

Bushnell, David L.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Physics


Heat storage; Phase transformations (Statistical physics); Solids--Thermal properties; Stoves; Electric; Neopentyl glycol


The objective o f this study is to determine the bulk material phase change characteristics o f neopentyl glycol (NPG) and design and test an electric NPG heater with application characteristics needed for an economical incubator. The analysis included the use o f organic solid-to-solid phase change materials for consistent heat storage to be applied in an incubation oven. The primary material used for this research was neopentyl glycol. The solid-solid phase change materials were implemented since solid-liquid phase change materials have the containment problem o f sealing in the liquid and possible corrosion problems depending on the liquid used. The solid-solid phase change materials such as NPG and pentaglycerine (PG) have stable phase changes for this application as revealed by studies showing phase change stability for more than several hundred cycles with no observed deterioration. An incubation oven needs to be held at a normal body temperature o f 98.6 Fahrenheit (37 °C). NPG in some form was needed as it has the desirable characteristic o f a reported phase change temperature o f 40-43 ° C fairly close to the required 37° C. This report will focus on the phase change properties o f bulk NPG, the design and test o f an NPG-controlled electric heater, and discussion o f possible designs for full-scale incubators with this type of internal heater.


Includes bibliographical references (leaf [71])


x, 70, [1] pages




Northern Illinois University

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