الفهرس 
Environmental Effects and Failure Modes for Terrestrial Solar cell ModulesOnly 14 pages are availabe for public view
 |  | from | 174 |  |  |
| | | from | 174 | | |
Abstract
The main purpose of this dissertation is to design and evaluate a new
PY structure module which overcomes the drawbacks of the existing
modules, using available materials., since the conventional module has
many deficiencies during its long-term operation on environmental
conditions. An example of such deficiencies are cell cracking, failure of
interconnection and degradation of output power.
The new PY module structure consists of three plates (front cover,
ceJJs adhered to substrate and backcover) which verify a thermal stress
relief on cells and m.i.n.imum cells temperature. Two methods of
interconnections are used in fabrication process. The first oue is through
hole method, and the second one is surface mount method, where
conductive adhesive is used, the fabrication processes are simplified. Also
besides to the conventional framing method., a case method have been
developed to give more mechanical rigidity to the module structure.
Modules of dimension (25 x 25)cm2 have been fabricated from
locally selected materials. These modules are subjected to thermal cycling
test, humidity test, air pressure cycling test and electrical isolation test. to
addition visual inspections, X ray radiography examination and electrical
performance measurements are performed after each qualification test to
evaluate the effect of environmental tests on performance and structure of
the modules Thermal, optical, and electrical models are developed to study the
effect of encapsulation layers on cell temperature, solar radiation.,and
output power. The results of these tests and measurements lead to
optimum design and realization of modules with simple fabrication process
and good performance.