Michael I Petersen

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European eels (Anguilla anguilla) undertake spawning migrations of more than 5000 km from continental Europe and North Africa to frontal zones in the Sargasso Sea. Subsequently, the larval offspring are advected by large-scale eastward ocean currents towards continental waters. However, the Sargasso Sea is oligotrophic, with generally low plankton biomass,(More)
Although heat pump water heaters are today widely accepted in both Japan and Europe, where energy costs are high and government incentives for their use exist, acceptance of such products in the US has been limited. While this trend is slowly changing with the introduction of heat pump water heaters into the residential market, but acceptance remains low in(More)
This paper describes the design and experimental evaluation of two high-efficiency interior permanent-magnet (IPM) motors for use in a commercial transcritical CO<sub>2</sub> (R-744) heat pump water heater (HPWH). Two IPM topologies, a 36-slot 6-pole topology and a 9-slot 6-pole topology, were selected, optimized, and prototyped using a common flat-bar IPM(More)
The development of lower global warming potential (GWP) blends offers an alternative for the widely used high GWP fluids such as R-404A. Commercial refrigeration systems for supermarkets are a common example for such systems. These kinds of systems show relatively large refrigerant leakage rates of 15% to 20% per year. The newly developed R-404A lower GWP(More)
Automated test equipment (ATE) is used extensively in production test and device characterization of integrated circuits (ICs). With future devices forecasted to contain hundreds of I/O cells operating at speeds from 5Gb/s to 10Gb/s, the challenge to test those devices with an ATE system is becoming more complex. The speed bottleneck is moving from the pin(More)
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