David G. Beers

Design and performance of a novel magnetocaloric heat pump

The design and preliminary results of an active magnetic refrigeration prototype for room temperature cooling applications are investigated. The physical prototype along with its operational and measurement envelopes are described. General design goals included: A wide range of cycle parameter control, independent fluid and magnetic circuits, extensive measurement capability, and compact overall design. An initial set of measurements has been made with Gadolinium particulate of an industrial purity. The maximum no-load span recorded was 21 K and the maximum power recorded was 26 W at a span of 1 K. Additionally, three different cyclical parameters have been varied to help determine the optimal cycle for such a machine. The unique modularity and control of this system will allow for a detailed understanding of the operation of commercial active magnetic regeneration designs.

Hybrid Design Method in New Product Development

A hybrid engineering approach to new product development is presented which reduces the time and resources necessary to bring a new product to market. The definition of key engineering and economic feasibility questions are developed. Examples and results of the transformation of these questions into engineering experiments and analytical studies are presented. Proper design of experiments and analytical studies is shown to have a dual effect in that feasibility is tested and some design window or parameter is identified. The early integration of advanced technology resources and product engineers in the feasibility stages is addressed. By this hybrid approach, significant development time can be trimmed.