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이동규(Donggyu Lee),정근면(Geunmyon Jeong),강채동(Chaedong Kang) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.6
Recently, the interest has been increased to the efficient use for unutilized energy and the emission reduction of carbon dioxide. In particular, waste water on middle temperature is recognized to one of the representative unutilized energy, which occurs on manufacturing processes in the many manufacturers such as power, food and textile industry. The unutilized energy have a disadvantage such as the low energy utility because low energy density. Therefore, a lot of research about the system improvement combined with a heat pump were reported for the production of heat energy of high temperature of utility. However, It is important to maintain steadily heat supply from the system. A heat storage and heat exchanger is applied to the system in order to increase utilization because the heated waste water which occurred in the industry process has various flow according to time. In this article, we designed an thermal storage type heat exchanger which has a thermal storage tank and heat exchanger function as an evaporator of heat pump system. The designed thermal storage type heat exchanger has a double shell and tube structure. Moreover, it is structured to the purpose of conducting stored heat and transferring to four heat medium including a phase change material(PCM). In this article, a basic experiment was conducted in order to measure the heat transfer characteristics of the each three heat medium between PCM. And experimental results will be used as the design data for thermal storage type heat exchanger.
폐열온도에 따른 축열식 이중원통다관형 열교환기의 축열 및 방열 특성
정근면(Geun Myon Jeong),김동현(Dong Hyun Kim),이동규(Dong Gyu Lee),정동열(Dong Yeol Chung),백종현(Jong Hyeon Peck),강채동(Chae Dong Kang) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
In recent era, the energy and environmental issues increases the interests, and many researches were undergone to recover unused energy in the form waste heat. This unused energy that occurs mostly from manufacturing processes and power generation industries. The present system is a regenerative evaporator for high temperature waste heat recovery that includes a heat storage tank in a double cylindrical tubular shape heat exchanger having phase change material (PCM), and triple heat transfer is possible. Basic experiments were carried out to confirm the heat storage and release characteristics of the regenerative heat exchanger. As a result of the experiment, we confirmed the change of the temperature and flow rate of the waste heat to the heat storage/release function of the regenerative heat exchanger and the influence on the thermal interference. This experimental result tries to utilize it as the design data of the regenerative evaporator of the high temperature heat pump (HTHP) which generates steam good enough for recovering waste heat.
고온수 온도에 따른 축열식 판형 열교환기의 축/방열 특성
김동현(Donghyun Kim),이동규(Donggyu Lee),강채동(Chaedong Kang) 대한설비공학회 2020 설비공학 논문집 Vol.32 No.10
Heat pump systems for high-temperature steam generation using waste heat generated in industrial sites are attracting attention. However, the disadvantage of waste heat is that it fluctuates quantitatively and qualitatively during the acquisition process. This study proposes the combination of the heat exchanger and thermal storage tank in a high-temperature heat source system to enhance the use of industrial waste heat as an energy source. The developed thermal storage type heat exchanger has a plate type heat exchange structure and allows mutual heat transfer between three mediums, including a phase change material (PCM). Named a thermal storage type plate heat exchanger (TSPHE), it comprises 16 kg of a PCM, with a phase change temperature of 68.8℃ to provide heat storage function. The heat storage and release characteristics of the PCM according to the temperature of hot water and cold water were verified through a heat transfer experiment using the TSPHE. Also, because of the structural characteristics of the TSPHE, the phenomenon of the three-medium heat exchange was verified during the experimental process. The heat storage and heat dissipation characteristics according to the supply temperature conditions of the heat medium used in the TSPHE were analyzed. The results of this study will be used as basic data for applying a thermal storage type evaporator to a high-temperature heat pump that generates steam using industrial waste heat.
복수의 열원 및 히트펌프를 이용하는 축열시스템 운전계획
이동원(Dong Won Lee),허재혁(Jae Heok Heo),김민휘(Min Hwi Kim) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
In Jincheon eco-friendly energy town which is promoted by the MSIP and is being conducted by the Korea Institute of Energy Research, the solar thermal based block_heating system is adopted. Block_heating system includes heat pump system as auxiliary heat source equipment for solar heat shortage, and this heat pump system is composed of a geothermal heat source, sewage heat sources and seasonal storage heat source heat pump with a capacity 50 RT each to correspond to maximum heating and cooling load. The thermal energy generated by the heat pump system is stored in a 200 m<SUP>3</SUP> capacity midnight time thermal energy storage and then supplied to the load side, thereby contributing to the reduction of operating costs and the electric power load leveling. In this study, we set up the day and night time operation plan of the heat pump system to cope with the maximum heating and cooling load.
축열식 연소산화장치 구현을 통한 VOCs 산화처리 및 폐열 회수 기술 개발
윤달환,박훈민,정현민,정영훈,민흥기,전동환 사단법인 한국안전문화학회 2022 안전문화연구 Vol.- No.17
The reduction of greenhouse gases and Carbon Neutral (Carbon Zero) due to global warming is agreed by all countries around the world. The increase in global average temperature to climate change is kept within 2°C compared to before industrialization and achieved 1.5°C in the long run. Korea has set a 37% reduction target (315 million tons) compared to the 2030 emission forecast (851 million tons) and is promoting various air pollution reduction technologies and R&D policies to reduce greenhouse gases and minimize the impact on climate change. Currently, there are VOCs that are directly emitted into the atmosphere or that cause greenhouse gases as simple power generation and heat sources. Aromatic hydrocarbons such as benzene are strong carcinogens that cause leukaemia, central nervous disorder, chromosomal abnormalities, and hydrochloride can produce photochemical oxides by destruction of the ozone layer, global warming, and chain reactions of volatile organic compounds, causing eye irritation, reduced visibility, and damage to plants and crops. VOCs reduction technology should reduce the amount of harmful substances in advance by controlling operating conditions and working conditions. Technologies that can effectively process VOCs throughput of 95% or more are heat storage combustion systems and heat storage catalyst combustion systems. This paper proposes a heat delivery system specification design and emission concentration measurement technology for high-efficiency waste heat recovery of 100 CMM RTO (Regenerative Thermal Oxidation) device to reduce air pollution in VOCs generating sites. For the application of the waste heat recovery system, a 100CMM heat storage combustion oxidation system (RTO) is designed, and the performance is evaluated by measuring the concentration of VOC (Volatile Organic Compound) emissions according to production process operating conditions.