NDLI: Optimization Strategies for a Portable Thermoelectric Vaccine Refrigeration System in Developing Communities

Content Provider	Springer Nature Link
Author	Ohara, B. Sitar, R. Soares, J. visoff, P. Nunez Perez, A. Lee, H.
Copyright Year	2014
Abstract	The traditional approach to determine an optimum current for thermoelectric cooling assumes that a refrigeration chamber is insulated and has no thermal resistance to a thermoelectric module. As a result, minimum temperature occurs when Peltier cooling matches with parasitic heat transfer and Joule heating. In practical application, minimum temperature happens when heat addition from the environment is matched with heat extracted by a thermoelectric module, and the optimum current differs from that anticipated by the traditional approach. Hence, consideration for insulation and thermal resistances via thermoelectric module should be made to achieve desirable cooling performance/refrigeration temperature. This paper presents a modeling approach to determine the optimum current as well as the optimum geometry to power a small thermoelectric vaccine delivery system for developing communities under the World Health Organization requirements. The model is derived from three energy conservation equations for temperatures at both ends of the thermoelectric materials within a module, as well as the refrigeration chamber temperature. A prototype was built and demonstrated a minimum temperature of 3.4°C. With optimized module geometry, the system is estimated to reduce power consumption by over 50% while achieving twice the temperature difference.
Starting Page	1614
Ending Page	1626
Page Count	13
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	44
Issue Number	6
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2014-11-05
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Peltier optimum current geometry system optimization Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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