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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.
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.