• 기계와재료
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• v.26 no.1
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• pp.28-36
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• 2014

소형 스털링엔진 발전시스템은 전력을 생산하기 위해 스털링엔진을 적용하는 시스템으로, 천연가스가 풍부한 북유럽 국가들을 중심으로 난방, 온수와 전기에너지를 동시에 공급할 수 있는 가정용 소형 열병합 발전시스템으로 각광받고 있다. 외연기관인 스털링엔진은 연료의 종류에 제한을 받지 않기 때문에, 태양열, 폐열, 천연가스 등의 다양한 열원을 이용한 발전시스템에 적용이 가능하다. 수 kW급의 스털링엔진을 적용한 소형 열병합 발전시스템의 기술개발 동향을 소개하고자 한다.

• Journal of Korea Ship Safrty Technology Authority
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• s.38
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• pp.2-11
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• 2015

최근 저탄소 녹색성장 및 그린에너지 개발 정책에 힘입어 외연기관의 일종으로 Stirling Engine에 대한 관심이 고조되고 있다. 스털링엔진은 크게 알파, 베타, 감마형의 3가지 방식으로 구분되어지며 그 중 감마타입 엔진의 설계가 용이하고 다양한 적용이 가능하다는 특징이 있음에도 실린더와 크랭크간의 접속거리 문제로 인하여 알파, 베타 타입에 비하여 용적을 크게 차지하는 문제가 있었다. 이를 해결하기 위한 방안으로 주로 알파형에 적용하는 Yoke crank를 적용하면 용적을 줄임과 동시에 실린더의 병렬화에도 유리하다. 금번 연구에서는 기존의 Ross Yoke crank 설계기법에서 나아가 감마형 스털링엔진의 Yoke crank 설계를 더욱 단순하고 효율적으로 적용할 수 있는 방법을 제시한다.

• Journal of Energy Engineering
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• v.25 no.1
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• pp.9-14
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• 2016

This study has been carried out to develop TM (Thermal to Mechanical) conversion systems for electric power generation using one of the Low Temperature Differential (LTD) Stirling engines called MM-7 capable of harnessing low temperature waste heat whose temperature is only $20{\sim}30^{\circ}C$ above the ambient. Measurements were made on the torque and rpm for a number of temperature differentials between the engine hot and cold ends, which could be effectively applied in developing the most suitable configuration for the high performance TM (Thermal to Mechanical) conversion system.

• 전기의세계
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• v.65 no.5
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• pp.24-33
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• 2016

• Journal of computational fluids engineering
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• v.16 no.2
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• pp.56-61
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• 2011

Numerical study is conducted to design the high temperature heat exchanger of Stirling engine by using the commercial CFD solver, FLUENT. The Fin-tube type of heat exchanger is designed as a reference model by considering the type of engine which is ${\beta}$-configuration. To find the optimal design of heat exchanger in heat transfer capacity numerical calculation is conducted by changing the shape, the number, and material of reference model in three-dimensional combustion field. Adjusted one-way constant velocity of working fluid that is helium is considered as the representative velocity of oscillating flow. The optimal design of heat exchanger considering the heat transfer capability is suggested by using the calculation results.

• 한국전산유체공학회:학술대회논문집
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• 2010.05a
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• pp.163-166
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• 2010

Numerical analysis is conducted to design the high temperature heat exchanger of Stirling engine by using the commercial CFD solver FLUENT. The fin-tube type of heat exchanger numerical calculation is conducted by changing the shape, number and material of fin shape of working fluid channel, etc in three-dimensional combustion field. Adjusted one-way constant velocity is used as the representative velocity of oscillating flow. The optimum design of heat exchanger considering the heat trasfer capability is suggested by using the calculation results.

• Transactions of the Korean Society of Mechanical Engineers
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• v.18 no.7
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• pp.1751-1758
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• 1994

A new set of governing equations is derived for the dynamic analysis of the Free-Piston Stirling Engines(EPSE). Equations from the ideal adiabatic model for the thermodynamic analysis of the working fluid are incoporated with the equations of motion for the moving masses of the system, resulting in a set of nonlinear differential equations. The coupled set of equations are numerically integrated with proper intial conditions to obtain a steady state response of the engine. The proposed method is compared with the conventional method of analyzing EPSE based mainly on the ideal isothermal model. The results clearly shows the limitationsl of the conventional methods and the relative advantages of the method proposed in the present study.

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.2198-2204
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• 2003

In order to make a match of the insufficient direct solar radiation, in this study, the target output is lowered to 9 kW smaller than 25 kW in former studies. It is also necessary to match the collector/receiver with engine/generator systems to accomplish the power level of a system. The simulation analyses of a dish solar power system with stirling engine are totally carried out to predict the system performance with the designed values. In addition, an influence of direct solar radiation on system performance and operation control is discussed in simulation. It is found that the diameter of concentrator could be made small to 8 m regardless of slope errors with 2.5 and 5.0 mrad radiation, and the operation range of mean pressure control. is wide even if the direct solar radiation is a quit low.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2001.05a
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• pp.122-128
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• 2001

The simulation analyses of a dish solar power system with stirling engine in this study are applied to system performance prediction if four different test sites; Seoul, Pusan and Cheju in Korea, and Naha in Japan. The effects of difference of concentrator type such as monolithic and stretched-membrane construction on system efficiency are also evaluated. The total amount of generated power for a year depends on the site. However the total maximum system efficiency in every site is approximately 16% and there isnt striking difference. It is also found that the maximum collector efficiency of stretched-membrane concentrator is about 3∼15% lower than that of the monolithic type.

• Journal of Power System Engineering
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• v.19 no.1
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• pp.5-12
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• 2015