Fundamental studies on High-Efficiency, High-Temperature Thermal Energy Transport by Means by Mans by Means of Termochemical Reaction and Thermal Radiation

提出了一种利用热化学反应和热辐射进行高效高温热能传输的方法。作为发展这种热能传递方法的一步，在实验室规模的密闭气体循环反应系统中进行了SO2/SO3可逆热化学反应热传递的基础研究。在该热传输系统中，热能通过吸收高温侧SO3还原的反应热，以SO2和O2的形式转化为化学能，产生的SO2和O2反应气体通过气体循环泵输送到另一低温侧。然后通过SO2和O2之间的放热氧化回收热能，生成的SO3反馈到更高的温度侧。在本研究方案中，对该热传输系统的可行性进行了实验验证，并对其热传输特性进行了…从反应气体组成变化和催化剂颗粒床层温度变化两个方面考察了SO2氧化和SO3还原过程中的反应气体组成变化和温度变化。从基本的观点来看，在本研究所采用的条件下，氧化和还原反应器中都产生了接近平衡浓度的SO2和SO3，证实了热能传递是连续的。此外，人们还认识到，在SO_2氧化和SO_3还原过程中，催化剂床层温度在床层入口附近分别达到最高和最低温度，并且催化剂床层的最高和最低温度随着SO_2与O_2的摩尔比和反应气体循环速率的增加而增加。另一方面，热辐射传输系统将热辐射能量转化为光能，然后通过专门制造的光纤和玻璃管等传输介质进行传输。通过测量这些材料对激光和红外线等不同光源的辐射输运特性进行了研究。较少

A high-efficiency, high-temperature thermal energy transport method by means of thermochemical reaction and thermal radiation was proposed. As a step of developing this thermal energy transport method, fundamental studies on heat transport using SO_2/SO_3 reversible thermochemical reaction were carried out in a lab-scale hermetic gas-circulating reaction system. In this heat transport system, the thermal energy is converted into the chemical energy in the form of SO_2 and O_2 by absorbing the reaction heat of deoxidization of SO_3 in a higher temperature side, and the produced reactant gases of SO_2 and O_2 are transported to another lower temperature side a gas-circulating pump. Then, the thermal energy can be recovered by the exothermic oxidation between SO_2 and O_2 there, and subsequently, the produced SO_3 is fed back to a higher temperature side. In this research progeam, the feasibility of this heat transport system was examined experimentally, and the heat transport characteris … More tics were investigated in terms of both the reactant gas composition change and the temperature change in a pt-catalyst particle bed during SO_2-oxidation and SO_3-deoxidezation, from a fundamental point of viewUnder the conditions employed in the present study, it was found that SO_2 and SO_3 of nearly the equilibrium concentration were produced in both the oxidation and the deoxidization reactors, and the it was verified that the thermal energy transport could be achieved continuously. Further, it was recognized that the catalyst-bed temperature attained a maximum and a minimum in the vicinity of the bed inlet in the course of SO_2-oxidation and SO_3-deoxidization, respectively, and that these maximum and minimum temperatures of the catalyst-beds incraeased with increases in both the molar ratio of SO_2 to O_2 and the reactant gas circulating rateOn the other hand, the thermal radiation transport system, in which the thermal radiation energy is converted into the light energy and then transported through such transport media as specilly manufactured optical fibers and glass tubes. has been studied by measuring radiative transport characteristics of these materials for different kinds of light sources like laser and infrared rays. Less