Physics Commons^™

Comparison Of Heat Output And Microchemical Changes Of Palladium Cathodes Under Electrolysis In Acidified Light And Heavy Water, Conrado Salas Cano

Dissertations and Theses

Two experiments have been conducted to ascertain if a cell with a palladium cathode, a platinum anode, and a solution of H₂SO₄ in D₂O can produce excess heat under electrolysis compared to a similar cell with H₂O. In each experiment, two cells were connected in series with constant current. The two cells were identical except for the fact that the heavy water cell used D₂O instead of H₂O in the electrolyte. Both cells in each experiment employed Pd cathodes, Pt anodes, and H₂SO₄ in the solution. …

Building Of A Thermoacoustic Refrigerator And Measuring The Basic Performance, Torsten Blumreiter

Dissertations and Theses

The application of thermoacoustic phenomena for cooling purposes has a comparatively short history. However, recent experiments have shown that thermoacoustic refrigeration can achieve practical significance for both every day cooling in households and cryocooling for scientific purposes due to its high reliability, environmental safety and functioning under extreme conditions.

We build a thermoacoustic refrigerator driven by a commercial loudspeaker. It was equipped with a vacuum pump and an entrance port for introducing different gases under different pressures as working fluids. It contained two thermocouples and a pressure transducer for quantitative measurements of the basic performance. The resonance frequency of the …

Heat Transfer Across Carbon-Liquid Helium I Interface, Constantine Antonopoulos

Dissertations and Theses

The subject to be discussed in this thesis is an experimental problem in heat transfer across a carbon-liquid helium I interface. The interest in this particular problem arose from experimental work first presented by Luce (1) concerning a similar heat transfer problem from a heated bismuth surface immersed in liquid helium. This study produced some interesting results which it was hoped could be duplicated with carbon. The choice of carbon as an alternative material was based on reasons which will be discussed later. Before beginning a detailed discussion of the problem a history of its development and the results which …