Kwankaomeng, Sutapat

Preferred name

Alternative Name

Kwankaomeng, S.

Main Affiliation

School of Engineering

sutapat.kw@kmitl.ac.th

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Effect of regenerator on V-type alpha Stirling engine performance
(2021-09-15)
Senviboon, Varit
;
Kansuwan, Panya
;
Silpsakoolsook, Banterng
;
Kwankaomeng, Sutapat
This paper presents the performance of an Alpha-type Stirling engine with and without a regenerator. The Alpha Stirling engine with a V-cylinder arrangement has two pistons that fit in hot and cold cylinders separately. The prototype engine has swept volume of 79 cm3. Working gas is ambient air and coolant is water. The engine performance test was conducted in two operating modes as a heat pump and a heat engine. Working as a heat pump, temperature drop at the cold cylinder was measured relative to work input from an induction motor. By varying its speed using an inverter, the cooling curves of the engine with and without regenerative heat exchanger were obtained for comparison. Working as a heat engine, on the contrary, heat input instead of work input as in the heat pump was applied to the engine by a fuel burner at a constant feed rate of LPG. The temperature on the cold cylinder is controlled by cooling water from the cooler. By varying the cooling water temperature, the variations of work output were measured from the output shaft by the rope brake dynamometer. The performance results of the two operating modes with and without regenerator were compared.
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Investigation on stability and performance of a free-piston Stirling engine
(2014-01-01)
Kwankaomeng, Sutapat
;
Silpsakoolsook, Banterng
;
Savangvong, Pongnarin
The stable operation of a free-piston Stirling engine will be achieved when both engine configurations and operating conditions are optimum. This paper presents stability and performance investigation of free-piston Stirling engine. Isothermal analysis is considered in the simulation. Dynamic motion of engine pistons such as the displacer and the power piston are both obtained. For engine design, the optimum parameters are given such as engine specifications, engine characteristics and working conditions to yield the maximum efficiency and reliability. The prototype was built and tested. The comparison of both experimental and simulation results are provided and discussed. 1876-6102© 2014 Published by Elsevier Ltd.
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Investigation and development on performance of a rice-husk powered Stirling engine-generator
(2012-01-01)
Kwankaomeng, Sutapat
;
Kongtragool, Bancha
;
Silpsakoolsook, Banterng
In few decades, modern Stirling engines were vastly developed and applied as cogeneration systems with high performance and efficiency. The principal advantages of the Stirling engine, external heating and high efficiency, make this engine of the bright future in sustainable energy. Because of the simplicity of its design, the Stirling engine can be manufactured as an inexpensive power source for electricity generation using biomass fuels with low noise and emission, efficient, and environment security. Accordingly, there are many research works of Stirling engine presented and commercial Stirling engines produced as alternative engines for renewable energy. However, power produced by Stirling engine using air as a working gas is usually inefficient and low in power. To increase power and efficiency of the engine, hence, dynamic balance and efficient heat transfer are the key factors. This project aims to present the investigation and development of a few horse power practical Stirling engine-generator using rice husk as biomass fuel. The engine is the betatype feature with rhombic drive mechanism using air as a working gas. Rhombic drive mechanism is designed for engine balance of a single acting engine. A rice husk burner system and heat exchanger configurations of the engine were proposed. A proof-of-concept engine has been built with swept volume of 110 cm<sup>3</sup> and tested. The testing results showed that the unpressurized engine started operation in only about 100 seconds at the heater temperature of 460°C with 312 rpm. At the heater temperature of 540°C, the engine speed was 680 rpm. At the engine speed of 280 rpm, the maximum torque was 0.245 Nm while the maximum power was 7.85 W at 360 rpm. The practical prototype is being manufactured with swept volume of 7,000 cm<sup>3</sup> and tested to achieve a few horse powers. The engine performance is continuing measured and improved. © 2012 by the American Institute of Aeronautics and Astronautics, Inc.
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Optimization and Investigation of a Free-Piston Stirling Engine based on Power and Frequency using Genetic Algorithm
(2019-05-16)
Savangvong, Pongnarin
;
Silpsakoolsook, Banterng
;
Kwankaomeng, Sutapat
This paper presents optimum design and performance investigation of a Free-Piston Stirling Engine (FPSE) by using genetic algorithm (GA). Mechanical and thermal analyses were considered in the optimization. Power and frequency were chosen primarily as the output performance. The mathematical model of the FPSE was provided from equation of motion in state space. The required engine operation frequency was set. The root of equation of motion is function of five unknowns including piston mass, displacer mass, stiffness of piston, stiffness of displacer and damping due to load. The engine operation with desired frequency occurs when two roots of equation of motion are imaginary part, which indicates operation frequency of the engine and other two roots are negative real part. The difference of operation frequency from equation of motion and desired frequency was set as the first objective function. The damping due to load which represents the work output of the engine was set as second objective function. Both objective functions were solved by GA.
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Optimization of geometrical parameter for V-type alpha Stirling engine based on dimensionless analysis
(2018-08-14)
Senviboon, Varit
;
Silpsakoolsook, Banterng
;
Kwankaomeng, Sutapat
This paper aims to study the effect of mechanism and geometrical parameters on the shaft work of alpha-type Stirling engine with V-cylinder arrangement and find the appropriate value of geometrical parameters to get the maximum value of shaft work output. The equation of motions of both expansion and compression pistons and the variations of volumes and pressures inside the cylinders are expressed in dimensionless forms. Schmidt analysis and Senft's shaft work theory are used to build dimensionless thermodynamic models in order to derive dimensionless shaft work and optimal geometrical parameters for achieving the maximum efficiency.

Kwankaomeng, Sutapat

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