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。作为发展这一热能传递方法的一个步骤，在实验室规模的密闭气体循环反应系统中，利用SO_2/SO_3可逆热化学反应进行了热传递的基础研究。在该传热系统中，高温侧吸收SO_3还原的反应热，将热能转化为SO_2和O_2的化学能，生成的反应气体SO_2和O_2通过气体循环泵输送到低温侧。然后，通过SO_2和O_2之间的放热氧化回收热能，随后，产生的SO_3被送回高温侧。本文通过实验验证了这种传热系统的可行性，并对传热特性进行了分析。 ...更多信息 本文从基本观点出发，研究了SO_2氧化和SO_3还原过程中Pt-催化剂颗粒床内反应气体组成的变化和温度的变化。在本研究的条件下，发现氧化和还原反应器中都产生了接近平衡浓度的SO_2和SO_3，并验证了热能传输可以连续实现。在SO_2氧化和SO_3还原过程中，催化剂床层温度分别在床层入口附近有一个最高值和一个最低值，且随着SO_2/O_2摩尔比和反应气循环量的增加，催化剂床层温度的最高值和最低值均增加。其中热辐射能量被转换成光能，然后通过诸如特殊制造的光纤和玻璃管的传输介质传输。已经通过测量这些材料对于不同种类的光源如激光和红外线的辐射输运特性进行了研究。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