Kwankaomeng, Sutapat

Preferred name

Alternative Name

Kwankaomeng, S.

Main Affiliation

School of Engineering

sutapat.kw@kmitl.ac.th

Now showing 1 - 10 of 12

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Design optimization on Ross yoke mechanism for stirling engine
(2026-05-15)
Jaisue, Apirat
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Kansuwan, Panya
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Kwankaomeng, Sutapat
This paper presents a design analysis and optimization of an Alpha-type Stirling engine with a double-acting mechanism. The engine has four cylinders with a piston diameter and length of 60 mm and 113.2 mm, respectively. Using the Ross yoke with a double-acting mechanism, the engine has a swept volume and stroke of 384.69 cm3 and 34 mm. The working gas is 10 bar pressurized air. ADAMS software is used to access dynamic balancing and kinematic analysis. Operating characteristics and performance were investigated and parameterized for optimization. Minimizing the stroke difference of four pistons, uniform piston stroke, is the objective function with the top and bottom-dead constraints. The length of the rocking lever attached to the yoke link influences the smooth reciprocating of all pistons. The simulation results with searching method optimization show the dynamic motion of the Ross yoke mechanism that can be adjusted to the optimal piston stroke with the suitable length of the rocking lever.
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Effect of regenerator on V-type alpha Stirling engine performance
(2021-09-15)
Senviboon, Varit
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Kansuwan, Panya
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Silpsakoolsook, Banterng
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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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A fractional horsepower free-piston Stirling engine-pump
(2008-01-01)
Kwankaomeng, Sutapat
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Pritzl, Andrew
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Fronczak, Frank J.
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Beachley, Norman H.
Stirling cycle engines offer potential advantages over internal combustion engines in fuel choices, noise, and emissions. A free-piston Stirling cycle engine-pump (FPSEP) has been investigated for potential use in human-scale, fractional horsepower applications. A design has been developed in the Fluid Power Research Laboratory at the University of Wisconsin-Madison that combines a free-piston Stirling engine with a single-acting piston pump. The design utilizes a pneumatic cylinder to drive the engine's displacer that in turn, controls engine speed. The performance and dynamic characteristics of this FPSEP have been simulated to predict its operating characteristics over a wide range of conditions. The simulation results indicate that a FPSEP operating at 3.8 MPa (550 psi) working gas pressure and with an engine displacement of 24.8 cm 3 (1.5 in3) running at 4400 cycles per minute could produce 1.3 kW (1.8 HP). A proof-of-concept engine-pump has been built and tested to validate the simulation results. In this device, heat is supplied by an electric heater and cooling is provided by water. At this time, the engine-pump has produced a low level of useful power while its operation has been limited to operating at 0.62 MPa (90 psi) working gas pressure while running at 120 cycles per minute. While the performance predicted by the simulation has not yet been achieved, work is continuing on extending the operating envelope for the engine-pump. Copyright © 2008 by Sutapat Kwankaomeng.
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Thermal performance enhancement in solar air heater channel with periodically V-shaped baffles
(2012-12-01)
Khanoknaiyakarn, C.
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Kwankaomeng, S.
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Promvonge, P.
The research paper presents a study on thermal performance enhancement in a rectangular channel heat exchanger mounted with periodically V-shaped baffles. The channel has an aspect ratio (width to height ratio), AR=10 and height, H=30 mm while baffle characteristics are the baffle to channel height ratio, e/H=0.2, 0.3 and 0.4; the baffle pitch to channel height ratio, PR=P/H=2 and 2.67; the attack angle (α) of 30°relative to the flow direction. The experiment has been conducted by varying air flow velocity in order to adjust Reynolds number range from 5000 to 25,000. The upper wall of the channel is uniformly heated as a constant heat flux while the rests are covered with thermal insulations to reduce heat loss to surroundings. The effects of the baffles on Nusselt number and friction factor have been examined. The overall performance of tested baffled channel is evaluated to obtain the degree of heat transfer enhancement and friction factor induced by baffles with respect to the smooth channel under similar flow conditions. © 2011 IEEE.
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Heat transfer enhancement and investigation on Stirling engine heater with biomass application
(2021-09-15)
Tuntrakeun, Punsa
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Kansuwan, Panya
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Kwankaomeng, Sutapat
This research presents a heat transfer enhancement technique on a Stirling engine heater equipped with a biomass fuel burner. ANSYS Fluent software was utilized in the computation of heat transfer, including heat flux and temperature distribution on the heater component of the engine. Effects of the increasing of the heating surface on heat transfer enhancement were investigated. Fin effectiveness resulting from the fin parameter variation of the heater, such as fin diameter and fin spacing, was evaluated for heat transfer under forced convection and heat conduction. This simulation results in the fin configuration most suitable for the fabrication of our Stirling engine heater.
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Thermal characteristics in square channel with 45° staggered baffle inserts
(2010-12-06)
Kwankaomeng, Sutapat
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Skullong, Sompot
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Teschareon, Thavee
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Promvonge, Pongjet
The paper presents a study of heat transfer in a heat exchanger channel inserted with staggered inclined baffles. The channel has a square section with uniform wall heat flux conditions. The fluid flow and heat transfer characteristics are presented for Reynolds numbers based on the hydraulic diameter of the channel ranging from 4000 to 25,000. The inclined baffles with an axial pitch equal to three times of channel height and with the attack angle of 45° are mounted in tandem and staggered arrangement on the lower and upper walls of the test channel. Effects of four baffle-to-channel height ratios (e/H = 0.1, 0.2, 0.3 and 0.4) on heat transfer in terms of Nusselt number and pressure loss in the form of friction factor are experimentally investigated. The experimental result shows that the insertion of staggered inclined baffles with the e/H=0.4 provides higher heat transfer and friction factor values than others. This is caused by higher baffle-to-channel height ratios of using e/H = 0.4 interrupting the flow and diverting its direction thus promoting high levels of mixing over others.
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Investigation on stability and performance of a free-piston Stirling engine
(2014-01-01)
Kwankaomeng, Sutapat
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Silpsakoolsook, Banterng
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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
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Kongtragool, Bancha
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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 cm3 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 cm3 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
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Silpsakoolsook, Banterng
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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
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Silpsakoolsook, Banterng
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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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