열전소자 및 열전냉각장치의 성능에 관한 연구

유성연,홍정표,심우섭 대한설비공학회 2004 설비공학 논문집 Vol.16 No.1

Thermoelectric module is a device that can produce cooling in a direct manner using the electrical energy. The purpose of this study is to investigate the performance of thermoelectric module and cooling system equipped with the thermoelectric module. The performance of a thermoelectric module is estimated using two methods; theoretical analysis based on one-dimensional energy equations and experimental tests using heat source, heat sink and brass conduction extenders. For the thermoelectric cooling system, the temperatures in the chamber are recorded and then compared with those of lumped system analysis. The results show that the cooling capacity and COP of the thermoelectric module increases as the temperature difference between hot and cold surface decreases, and there is particular current at which cooling capacity reaches its maximum value. The experimental results for the thermoelectric cooling system are similar to those of lumped system analysis.

열전소자의 신뢰성평가를 위한 비접촉 공중 초음파 탐상기법의 적용

고가진 ( Jia-chen Gao ),김재열 ( Jae-yeol Kim ),이경일 ( Gyung-il Lee ),김원배 ( Won-bae Kim ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.4

The Thermoelectric Module is a new type of artificial refrigeration technology development on the basis of the discovery in 1834 of Peltier effect. The use of Thermoelectric Module is used as a heat pump has the advantages of no pollution, small size, no noise and other characteristics in line with environmental protection requirements, low power consumption has been widely used in many industries. Thermoelectric Module production from material to product assembly process has certain reference now, but with the application of Thermoelectric Module is more and more widely than before, people`s requirement on the efficiency of Thermoelectric Module and reliability becomes higher. people pay more deep research on the Thermoelectric Module. At present, the research for efficiency of Thermoelectric Module on the international is mainly concentrated in the material. However, the research of materials has certain limit, the research of materials had reached a bottleneck. NAUT (Non-contact Air coupled Ultrasonic Testing) is an inspection technique to remedy the existing contact inspection by supplementing energy loss created by differences of acoustic impedance between the solid and the air with high power ultrasonic Pulser Receiver, PRE-AMP, and high sensitivity probe, and enabling the ultrasonic inspection which uses the air as a medium. As explained above, in this thesis will show you how to use the NAUT to check out the defects inside. According to the scanning picture to judge the position and the size of defects inside. Above all, solved the problem of the detection of joint situation, and this method could give some help to improve the performance of Thermoelectric Module.

열전모듈 냉방기에서 열전모듈의 개수 및 전원배열이 시스템의 성능에 미치는 영향

황준(Jun Hwang),강병하(Byung Ha Kang) 대한설비공학회 2007 설비공학 논문집 Vol.19 No.2

This paper presents the effects of thermoelectric module arrangement on the cooling performance of an air conditioner using thermoelectric module. A prototype of air cooling system, employing several thermoelectric modules, has been designed and built. The evaporative cooling technique is adopted for hot side of the module. The number of thermoelectric module in the system has been varied in the range of 2~8. The optimal operation conditions, such as input power to the thermoelectric module, fans and pump, have been determined for each arrangement of the system and the cooling performance has been compared under the optimal operation. It is found that both cooling capacity and COP are increased as the number of thermoelectric module increased. It is also found that cooling capacity can be improved by connecting the thermoelectric modules in series than in parallel, while the COP is little affected.

콘크리트 구조물에서의 열전모듈 거동에 관한 기초연구

임치수(Lim, Chisu),이재준(Lee, Jaejun) 한국도로학회 2015 한국도로학회논문집 Vol.17 No.5

PURPOSES : The purpose of this paper is to investigate the application of thermoelectric technology to concrete structures for harvesting solar energy that would otherwise be wasted. In various fields of research, thermoelectric technology using a thermoelectric module is being investigated for utilizing solar energy. METHODS: In our experiment, a halogen lamp was used to produce heat energy instead of the solar heat. A data logger was used to record the generated voltage over time from the thermoelectric module mounted on a concrete specimen. In order to increase the efficiency of energy harvesting, various factors such as color, architecture, and the ability to prevent heat absorption by the concrete surface were investigated for the placement of the thermoelectric module. RESULTS : The thermoelectric module produced a voltage using the temperature difference between the lower and upper sides of the module. When the concrete specimen was coated with an aluminum foil, a high electric power was measured. In addition, for the power generated at low temperatures, it was confirmed that the voltage was generated steadily. CONCLUSIONS: Thermoelectric technology for energy harvesting can be applied to concrete structures for generating electric power. The generated electricity can be used to power sensors used in structure monitoring in the future.

열전소자 내부 층간 결함과 열성능 관계에 관한 연구

최철준(Choul-Jun Choi),고가진(Jia-Chen Gao),김재열(Jae-Yeol Kim),정윤수(Yoon-Soo Jung) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.4

From the first application of a thermoelectric module to nowtoday, it has been more than half a century. The application of a thermoelectric module is becoming more and more widely accepted since, people"s requirement rely more and more on the efficiency of thermoelectric modules and their reliability become higher and higher. So people pay more and more attention to the thermoelectric module. In Around the world, the more research for into improving the efficiency of thermoelectric modules is focused on the current materials. at present. However, the research of into available materials had has some limitations, and the research of materials had reached a bottleneckthere are limits to current applications. On the other hand, from the production process, if we assembled by materials withoutmodules without any damages and achieve the ideal state of a joint, we can make the a product to maximize performance and have a longer service life. SoTherefore, in this study we will prove the relationship between the any defects inside and the efficiency of a thermoelectric module to improve the quality management and performance of modern thermoelectric modules at present.

태양열 온수 시스템에 적용 가능한 100 W급 열전발전 모듈 성능에 관한 연구

서호영,이경원,윤정훈,이순환 한국태양에너지학회 2019 한국태양에너지학회 논문집 Vol.39 No.1

Solar hot water system produces hot water using solar energy. If it is not used effectively, overheating occurs during the summer. Therefore, a lot of research is being done to solve this. This study develops thermoelectric power module applicable to solar hot water system. A thermoelectric material can directly convert thermal energy into electrical energy without additional power generation devices. If there is a temperature difference between high and low temperature, it generate power by Seebeck effect. The thermoelectric module generates electricity using temperature differences through the heat exchange of hot and cold water. The water used for cooling is heated and stored as hot water as it passes through the module. It can prevent overheating of Solar hot water system while producing power. The thermoelectric module consists of one absorption and two radiation part. There path is designed in the form of a water jacket. As a result, a temperature of the absorption part was 134.2°C and the radiation part was 48.6°C. The temperature difference between the absorption and radiation was 85.6°C. Also, The Thermoelectric module produced about 122 W of irradiation at 708 W/m 2 . At this time, power generation efficiency was 2.62% and hot water conversion efficiency was 62.46%. 태양열 온수 시스템은 태양에너지를 이용하여 온수를 생산한다. 하지만 여름철 같은 경우 과열로 인하여 충분히 사용되지 못하고 있어 이를 해결하기 위하여 많은 연구가 진행되고 있다. 본 연구는 태양열 온수 시스템에 적용이 가능한 열전발전모듈을 개발하는데 있다. 열전발전은 특별한 설비 없이 태양열로부터 전력 생산이 가능하다. 태양에너지로부터 획득한 열을 흡열부로 보내고 냉수를 방열부로 보내어 그 온도차를 이용하여 전력이 생산된다. 열전발전모듈의 흡열부와 방열부는 워터자켓 구조로 설계, 제작하였다. 열전발전모듈의 성능시험을 위해 태양열 온수시스템에 적용하여 성능시험을 한 결과, 일사량 708 W/m2에서 흡열온도 134.2℃, 방열부 온도 48.6℃, 온도차 85.6℃ 일 때, 122W의 전력을 생산하였다. 또한 발전효율은 2.62%, 난방효율은 62.46%로 나타났다.

열에너지 하베스팅을 위한 열전모듈 발전특성 연구

윤진철(Jin-Chul Yun),주정명(Jungmyoung Ju),황종현(Jong-Hyun Hwang),이수목(Soo-Mok Lee) 한국에너지학회 2014 한국에너지공학회 학술발표회 Vol.2014 No.4

CO₂ 배출 규제와 에너지 소비 절감의 요구가 늘어남에 따라, 버려지는 열을 수확하여 전기를 생산하기 위한 열전발전 연구가 최근 활발히 이루어지고 있다. 본 연구는 폐열 에너지회수장치로 사용하기 위한 열전모듈의 발전 특성을 분석하기 위해 수행되었다. Bismuth telluride로 제작된 열전모듈에 다양한 온도 조건을 부여하며 이에 따른 열전 거동을 분석하였다. 또한 다양한 온도 조건에서의 열전모듈의 발전 효율을 실험 및 이론에 의해 분석하였다. 이로부터, 열전모듈로 열에너지를 보다 효율적으로 회수하기 위한 방안을 제시하였다. Recently, due to limitation of CO₂ gas emission and increase of demand to reduce energy consumption, lots of researches are conducted to harvest wasted heat energy with thermoelectric module to produce electricity by Seebeck effect. This study was conducted to analyze characteristics of thermoelectric module to apply for heat energy harvesting device. Thermoelectric module composed of bismuth telluride was tested with various temperature conditions to analyze thermoelectric behavior of the module. Power geneation efficiency of the thermoelectric module for various temperature condition was analysed with both experimental and theoretical methods. From the results, method to harvest wasted heat energy with thermoelectric module more efficiently was proposed.

열전소자를 이용한 차량용 독립 냉난방시스템에 대한 실험적 연구

이대웅(Dae-Woong Lee) 대한설비공학회 2014 설비공학 논문집 Vol.26 No.8

The purpose of this paper is to investigate the cooling and heating performance of a standalone-type thermoelectric system equipped with a thermoelectric module. The system consists of a blower and two thermoelectric modules with a fin, which is soldered onto both sides of the thermoelectric module and a courtesy light. The thermoelectric system experiment is conducted with the intake voltage to find the optimum cooling and heating performance of each. The results showed that the cooling capacity and coefficient of performance (COP) were 22 W and 0.31, and the heating capacity and COP were 147 W and 1.1, respectively. In the vehicle cooling and heating performance test in a climate wind tunnel, the results showed that the standalone thermoelectric system"s cooling performance was slightly better than the base system; and the heating performance of the standalone thermoelectric system was 54.1°C and the COP was 1.3, compared to the base system.

열전소자를 활용한 도로구조물에서의 에너지 하베스팅 기초 연구

이재준,김대훈,이강휘,임재규,이승태 한국도로학회 2014 한국도로학회논문집 Vol.16 No.6

PURPOSES: An conventional method for electric power generation is converting thermal energy into mechanical energy then to electricalenergy. Due to environmental issues such as global warming related with CO2 emission etc., were the limiting factor for the energy resourceswhich resulting in extensive research and novel technologies are required to generate electric power. Thermal energy harvesting usingthermoelectric generator is one of energy harvesting technologies due to diverse advantages for new green technology. This paper presents apossibility of application of the thermoelectric generator、s application in the direct exchange of waste solar energy into electrical power in roadspace. METHODS : To measure generated electric power of the thermoelectric generator, data logger was adopted as function of experimentalfactors such as using cooling sink, connection methods etc. Also, the thermoelectric generator、s behavior at low ambient temperature wasinvestigated as measurement of output voltage vs. elapsed times. RESULTS: A few temperature difference between top an bottom of the thermoelectric generator is generated electric voltage. Componentsof an electrical circuit can be connected in various ways. The two simplest of these are called series and parallel and occur so open. Seriesshows slightly better performance in this study. An installation of cooling sink in the thermoelectric generator system was enhanced the outputof power voltage. CONCLUSIONS : In this paper, a basic concepts of thermoelectric power generation is presented and applications of the thermoelectricgenerator to waste solar energy in road is estimated for green energy harvesting technology. The possibility of usage of thermoelectrictechnology for road facilities was found under the ambient thermal gradient between two surfaces of the thermoelectric module. An experimentresults provide a testimony of the feasibility of the proposed environmental energy harvesting technology on the road facilities.

열전소자를 활용한 도로구조물에서의 에너지 하베스팅 기초 연구

이재준,이대훈,이강휘,임재규,이승태 한국도로학회 2014 한국도로학회논문집 Vol.16 No.6

PURPOSES: An conventional method for electric power generation is converting thermal energy into mechanical energy then to electrical energy. Due to environmental issues such as global warming related with CO2 emission etc., were the limiting factor for the energy resources which resulting in extensive research and novel technologies are required to generate electric power. Thermal energy harvesting using thermoelectric generator is one of energy harvesting technologies due to diverse advantages for new green technology. This paper presents a possibility of application of the thermoelectric generator、s application in the direct exchange of waste solar energy into electrical power in road space. METHODS : To measure generated electric power of the thermoelectric generator, data logger was adopted as function of experimental factors such as using cooling sink, connection methods etc. Also, the thermoelectric generator、s behavior at low ambient temperature was investigated as measurement of output voltage vs. elapsed times. RESULTS: A few temperature difference between top an bottom of the thermoelectric generator is generated electric voltage. Components of an electrical circuit can be connected in various ways. The two simplest of these are called series and parallel and occur so open. Series shows slightly better performance in this study. An installation of cooling sink in the thermoelectric generator system was enhanced the output of power voltage. CONCLUSIONS : In this paper, a basic concepts of thermoelectric power generation is presented and applications of the thermoelectric generator to waste solar energy in road is estimated for green energy harvesting technology. The possibility of usage of thermoelectric technology for road facilities was found under the ambient thermal gradient between two surfaces of the thermoelectric module. An experiment results provide a testimony of the feasibility of the proposed environmental energy harvesting technology on the road facilities.