Performance improvement of a solar volumetric reactor with passive thermal management under different solar radiation conditions |
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| Affiliation: | 1. Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi''an Jiaotong University, PR China;2. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;1. Shenyang University of Chemical Technology, Shenyang 110142, China;2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;1. National Engineering Research Center of Chemical Fertilizer Catalyst, School of Chemical Engineering, Fuzhou University, Gongye Road 523, Gulou District, Fuzhou, Fujian 350002, PR China;2. Qingyuan Innovation Laboratory, Quanzhou, Fujian 362801, PR China;1. JSC R&D Center at FGC UES, 22/3, Kashirskoye Shosse, Moscow 115201, Russia;2. LLC ITC “DonEnergoMash”, 344006, Rostov-on-Don, Suvorova St., 38a, office 13, Russia;3. LLC RPE “Donskie Technologii”, 346400, Novocherkassk, St. Mikhailovskaya, 164A, Russia;4. Federal State Budgetary Institution of Science “Federal Research Centre The Southern Scientific Centre of The Russian Academy of Sciences”, 344006, Rostov-on-Don, St. Chehova, 41, Russia |
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| Abstract: | To alleviate the effect of solar radiation fluctuation on the solar volumetric reactor, phase change material (PCM) is applied to buffer the temperature vibration and improve the stability of thermochemical reactions. In this work, we analyzed the heat flow and distribution characteristics of the conventional double-walled volumetric reactor filled with PCMs (SVR1). We then proposed a novel solar volumetric reactor design (SVR2) to solve the problems of local high temperature, slow charging-discharging rate, and fluctuating methane conversion in various radiation conditions. The heat and mass transfer model coupled with thermochemical reaction kinetics was established to compare the performance of SVR1 and SVR2 under steady state, heat charging-discharging mode, and actual solar radiation fluctuation, respectively. The results show that compared to SVR1, the maximum temperature of SVR2 decreases by 106.3 K, and the minimum methane conversion rate increases from 77.4% to 93.6% under natural solar radiation fluctuation. |
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| Keywords: | Solar energy Methane steam reforming Volumetric reactor Passive thermal management |
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