An experimental comparison of a pin stack to a conventional stack in a thermoacoustic prime mover
Gibson, Rodney Jay
MetadataShow full item record
This thesis is an experimental comparison of a pin stack to a conventional stack in a thermoacoustic prime mover. A thermoacoustic prime mover is a type of natural heat engine which converts a temperature gradient across a stack into acoustic energy. A pin stack uses wires which are arranged in a hexagonal array instead of the parallel or rolled plates of a conventional stack. The pin stack was constructed by by threading 75 micron constantan wire between the hot and cold heat exchangers 2312 times. Computer modeling with the program DeltaE predicts that a pin stack will significantly improve the efficiency of the prime mover. In the experiment the temperature gradient across the stack was supplied by submerging the cold end in liquid nitrogen while holding the hot end at ambient temperature. The experiment was conducted for both the pin stack and a conventional rolled stack. The pin stack produced 20% higher acoustic pressures than the rolled stack and the efficiency was up to 31% better. The pin stack went into onset at a 41% lower mean pressure than the rolled stack.
Showing items related by title, author, creator and subject.
Ao, Chia-ning (Monterey, California. Naval Postgraduate School, 1989-06);Thermoacoustic heat transport and its applications, such as thermoacoustic engines and refrigerators, have been discussed in a number of articles over the past several years. However, lacking from these articles is a ...
Atchley, Anthony A. (Monterey, California. Naval Postgraduate School, 1996-06-11); NPS-PH-96-003This technical report details progress in basic research in thermoacoustic heat transport made during the period June 1, 1995 through May 30, 1996. Research efforts were primarily concentrated in three areas: 1) investigation ...
Nessler, F. Scott (Monterey, California. Naval Postgraduate School, 1994-12);This thesis compares the pin stack with a conventional rolled stack for a thermoacoustic prime mover. A pin stack is a new geometry for stacks used in thermoacoustic engines consisting of a lattice ...