Numerical investigation and comparative analysis of nanofluid cooling enhancement for TEG and TEC systems

• DOI: 10.1016/j.csite.2021.101331
• Publication Date: 2021-08-13T07:31:57Z
• Authors: He Ruan; Heping Xie; Jun Wang; Jiaxi Liao; Licheng Sun; Mingzhong Gao; Cunbao Li
• Keywords: Thermoelectric cooling; Multiphysics; Coefficient of performance

To enhance the energy conversion of thermoelectric devices, graphene nanoplatelets (GNPs) nanofluids are generally utilized into heat exchangers to boost cooling capability for generators (TEGs) and coolers (TECs). In this study, a fluid-thermal-electric multiphysics coupled model is developed uncover performance enhancements both TEG TEC systems using nanofluids, by which thermodynamic performances associated with nanofluid flow behaviors can be taken account simultaneously. The enhancement effects weight concentration on transfer, TEG's electricity generation, TEC's comprehensively investigated varying Reynolds numbers (Re). numerical analysis demonstrates validity improvements in TEG/TEC systems, also shows that effect increases nanoparticle but reduces Re. Specifically, 0.1 wt% used instead water Re = 100, output power efficiency enhanced 11.38% 5.7% system, while coefficient (COP) system improved 12.13% 9.1%, respectively. ratios, however, decrease rapidly less than 5% increasing Re, gradually reach steady level when exceeds 1200. Of particular interest proves much stronger as coolants various cases, suggesting application seems more promising system. This work provides coupling modeling approach reveal performances, may bring new implications optimization design systems.