2007 Graduate Catalog and 2006 Annual R & D Report - Sirindhorn ...

2007 Graduate Catalog and 2006 Annual R & D Report
Sirindhorn International Institute of Technology (SIIT)
Dr. Satha Aphornratana
Associate Professor
B.Sc. in Mechanical Engineering, Prince of Songkhla University, Songkhla, Thailand
M.Eng. in Mechanical Engineering, University of Technology, Sydney, Australia
Ph.D. in Mechanical Engineering, University of Sheffield, England
Area of Specialization: Refrigeration system.
Research Interest:
Heat Powered Refrigeration Cycles
A refrigeration system is a thermodynamics cycle that
removes heat from an enclosed space, or from a
substance, and rejects it out to the surrounding at a
higher temperature. In most refrigeration systems, the
liquid refrigerant is evaporated at a low pressure and
is condensed back to liquid at a higher temperature.
The refrigerant can absorb heat at a low temperature
during the evaporation process and condense back to
liquid by rejecting heat out to the surrounding during
the condensation process. Many types of refrigeration
systems have been invented. The most common
system used is known as “a vapor-compression
refrigeration system”. In this system, the elevation of
the refrigerant pressure is achieved by means of a
mechanical compressor. This system is operated
using electrical energy input to the mechanical
compressor. Therefore it is known as a workedoperated
refrigeration system.
Since energy consumption and environmental
problems have become serious issues for the world,
there have been many attempts to reduce the use of
electricity in the refrigeration process. Heat powered
refrigeration systems seem to be one of the most
appropriate systems for the current energy and
environment situations. Unlike the work-operated
refrigeration systems, industrial waste heat can be
recovered and converted to produce the useful
refrigeration. As a result, the electricity purchased
from utility companies for producing refrigeration from
a conventional vapor compression refrigerator can be
reduced. Therefore, the use of a heat powered
refrigeration system helps reduce problems related to
the global environment, such as emissions from
burning fossil fuels in utility power plants. There are
two well-known types of heat operated refrigeration
systems: a jet refrigeration system and an absorption
refrigeration system.
Dr. Supachart Chungpaibulpatana
Associate Professor
B.Sc. (Honors) in Mechanical Engineering, Prince of Songkhla University, Songkhla, Thailand
M.Eng. & D.Eng. in Energy Technology, Asian Institute of Technology (AIT), Thailand
Areas of Specialization: Thermal engineering, Solar energy, Energy conservation and management.
Research Interests:
With a background in mechanical engineering and
energy technology, research activities and interests
include both energy equipment design, development
and applications, as well as energy system planning
and management.
Energy conservation and management in
industries and in large commercial buildings in
Thailand is an area which still needs a lot of research.
The main topics include energy analysis of potential
savings, thermal energy storage (cool/ice storage) for
air-conditioning system, cogeneration system for
industries which require both heat and electricity
simultaneously, industrial waste heat recovery and
evaporative cooling.
The transportation sector accounts for about 45% of
total energy demand in Thailand and, in addition,
fuels used are mainly from imported petroleum. This
not only affects the country economy but burning
fossil fuels also produces air pollution as well as CO 2
which is a main greenhouse gas emission. Research
topics under investigation include the development of
Bangkok driving modes for various types of vehicles,
assessment of the use of catalytic converters in
gasoline cars, and the effects of using vegetable oils
in diesel engines.
Another field of research to be mentioned is
concerned with solar energy; both thermal and
electrical applications. Interesting topics under
consideration are the design and development of low
cost solar water heaters using local materials, solarphotovoltaic
refrigerators for use in remote areas
where electricity from the utility grid is not available,
modeling of solar PV/thermal systems under various
types of applications, development of standard
methods for testing solar energy equipment, software
packages for optimum sizing of solar energy systems.
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