Preface - kmutt

194
10-15, 2005, Shanghai, China, pp. 287-288
We examine the effects of voltage
conditions (voltage amplitude and phase angle)
for grid disconnecting time of a 1.4 kWp PV
grid-interactive system. Various types of loads
are investigated, i.e. resistive, reactive and those
that could resonate at 50 Hz. Dependence of
disconnecting times can be explained on basis of
stored energy in reactive loads. We have
observed that disconnecting time is also affected
by voltage conditions.
IC-334 PV IMPEDANCE
CHARACTERIZATION USING SQUARE
WAVE METHOD AND FREQUENCY
RESPONSE ANALYZER
Chamnan Limsakul, Nattavut Chayavanich,
Dhirayut Chenvidhya, Krissanapong Kirtikara
The 15 th International Photovoltaic Science &
Engineering Conference (PVSEC-15), October
10-15, 2005, Shanghai, China, pp. 849-850
We determine impedance of a
crystalline Si solar cell using a frequency
response analyzer over 1 Hz to 50 kHz and basic
instruments using square wave inputs from 10
Hz to 50 kHz. Impedance loci are plotted in a
complex plane. Derivation of series and shunt
resistance from the measured results are made
and results compared. Owing to low resolution
of a digital oscilloscope used, shunt resistance
being normally large can be accurately
determined, but not series resistance.
IC-335 DIAGNOSTIC METHOD FOR
EVALUATION OF PV MODULES USING AC
IMPEDANCE SPECTROSCOPY
Tasanee Chayavanich, Chamnan Limsakul,
Nattavut Chayavanich, Dhirayut Chenvidhya,
Krissanapong Kirtikara
The 15 th International Photovoltaic Science &
Engineering Conference (PVSEC-15), October
10-15, 2005, Shanghai, China, pp. 450-451
Substantial deterioration of PV modules
that were field-exposed for over 10 years in
Thailand have been observed. Laboratory
analysis was made through measuring the static
and dynamic characteristics of the modules. We
find that dynamic characterization readily
provides adequate information, in terms of series
and shunt resistance, in screening modules
KMUTT Annual Research Abstracts 2005
similar to static ones and yields more
information for dynamic performance
prediction. We propose that the dynamic method
can be used as a diagnostic tool.
IC-336 AIR POLLUTION ISSUES IN
THAILAND
Robert A. Dunn, Jonathan Hoyin Chan
The 55 th Canadian Chemical Engineering
Conference, October 16-19, 2005, Metro
Toronto Convention Centre, Toronto, Ontario,
Canada
Thailand's rapid economic development
over the last two decades has led to a significant
increase in urban air pollution, especially within
the Bangkok Metropolitan Area (BMA). This
problem is attributable to an increase in power
and transportation demands as well as an
increase in pollutants released from industrial
sources. Airborne paniculate matter and
greenhouse gases are of particular concern. The
problem is compounded by the mixed
residential/industrial zoning in many parts of the
country. In 2001, approximately 6.3 billion US
dollars was spent on health problems related to
airborne paniculate matter in Thailand,
according to a report by the U.S. Department of
Environment. The reduction of greenhouse gas
emissions is also a high priority in Bangkok as
its location makes it particularly vulnerable to
the rise in sea level associated with global
warming. In addition, human activities, such as
urban garbage dumps and the burning of fossil
fuels and biomass, have also contributed to the
urban air pollution problems within the BMA.
These concerns have lead ThaHand to regulate
the industrial and transport sector more strictly
and investigate alternative energy options. New
projects at the Thailand Environment Institute
(TEI) in 2005 include enhancing the promotion
of energy efficiency and environment
management in municipalities and promotion of
biomass energy use.
IC-337 CONVERSION OF I-PARAFFIN TO N-
PARAFFIN FOR A NAPHTHA CRACKING
PROCESS
Kitti Thamkoson, Jonathan Hoyin Chan
The 55 th Canadian Chemical Engineering
Conference, October 16-19, 2005, Metro
Toronto Convention Centre, Toronto, Ontario,
Canada
International Conference