| dc.contributor |
Peterson, Richard |
|
| dc.contributor |
Lee, John |
|
| dc.contributor |
Bay, Brian |
|
| dc.date |
2007-08-29T15:44:43Z |
|
| dc.date |
2007-08-29T15:44:43Z |
|
| dc.date |
2007-08-23 |
|
| dc.date |
2007-08-29T15:44:43Z |
|
| dc.date.accessioned |
2013-10-16T08:09:32Z |
|
| dc.date.available |
2013-10-16T08:09:32Z |
|
| dc.date.issued |
2013-10-16 |
|
| dc.identifier |
http://hdl.handle.net/1957/6362 |
|
| dc.identifier.uri |
http://koha.mediu.edu.my:8181/xmlui/handle/1957/6362 |
|
| dc.description |
Graduation date: 2008 |
|
| dc.description |
Driven by the need for high energy-density power sources, demand has
stimulated the development of small-scale engines. A small-scale engine
with a fuel supply could replace batteries and utilize higher energy-density
liquid hydrocarbon fuels; such an advance could deliver a new age of
portable devices. Currently, operable small-scale engines exist; yet their
efficiencies are poor. One possible alternative for improving efficiency is
the incorporation of thermal regeneration. This thesis develops a concept
for an efficient miniature reciprocating engine for portable power production
that is based upon the regenerated atmospheric cycle and uses a
magnet-actuated in-cylinder regenerator. As part of the development of
the proposed engine, a dynamic model of the regenerator was developed
concurrently with an engine simulator. The dynamic model was validated
using the engine simulator and can now be used to develop a model to
study the thermal aspects of regeneration. The engine simulator was also
used to study a unique lubrication-free low-friction piston-cylinder set
that utilizes a graphite-glass clearance seal. The piston cylinder set was
subjected to several pressure tests, including one with a 26 h duration. It
was found that with the addition of aspiration slots, the piston cylinder
set with the engine simulator operating at 1800 rpm could reach a peak
pressure of approximately 370 kPa with a pressure ratio of approximately
4.2. For the 26 h long-duration test, it was found that the graphite piston
did not show any significant wear. However, elastomer cups that were
part the ball-joint supports for the piston did exhibit wear that lead to a
decrease in peak cycle pressure with time. |
|
| dc.language |
en_US |
|
| dc.subject |
Atmospheric Engine Permanent Magnet |
|
| dc.subject |
Dynamic Model Inverse Square Law |
|
| dc.title |
Design considerations for a miniature atmospheric engine with a magnet-actuated autonomously-reciprocating in-cylinder regenerator for portable power production |
|
| dc.type |
Thesis |
|