Parametric study of thermoelectric power generators under large temperature difference conditions

Abstract To help study the performance of thermoelectric power generators in conditions where there are large temperature differences between the hot-side heat exchanger and the cold-side heat exchanger, this paper presents a simplified numerical model that includes temperature-dependent properties of thermoelectric materials. Specifically, the temperature difference is added into the calculations of the current across thermoelectric legs. The results indicate that the simplified numerical model could reduce calculation time without reducing calculation accuracy. The variable physical properties of thermoelectric materials should be considered in the counter-flow arrangement at high temperature, but they can be neglected in the co-flow arrangement. The inlet temperature of hot fluid and the variable physical properties of thermoelectric materials have a coupling influence on the performance of thermoelectric power generation, which could change the variation trend of output power. The performance of thermoelectric power generation for the counter-flow arrangement is better than that for the co-flow arrangement, especially with high heat transfer coefficients and long channel lengths. When the the various physical properties of thermoelectric materials are considered, the maximum output power and efficiency occur at ratios of load resistance to internal resistance of about 1.5–1.8 for output power and 1.7–2 for efficiency.

[1]  Marcin Borcuch,et al.  Analysis of the fins geometry of a hot-side heat exchanger on the performance parameters of a thermoelectric generation system , 2017 .

[2]  Ali Shakouri,et al.  Optimization of power and efficiency of thermoelectric devices with asymmetric thermal contacts , 2012 .

[3]  Kenji Koga,et al.  Flexible n-type thermoelectric materials by organic intercalation of layered transition metal dichalcogenide TiS2. , 2015, Nature materials.

[4]  Frédéric Lesage,et al.  A study on heat transfer enhancement using flow channel inserts for thermoelectric power generation , 2013 .

[5]  Heng Wang,et al.  Ultrahigh power factor and thermoelectric performance in hole-doped single-crystal SnSe , 2016, Science.

[6]  M. N. Norizan,et al.  The Nanometer-Sized Eutectic Structure of Si/CrSi2 Thermoelectric Materials Fabricated by Rapid Solidification , 2018, Journal of Electronic Materials.

[7]  Qiuwan Wang,et al.  A review on thermoelectric-hydraulic performance and heat transfer enhancement technologies of thermoelectric power generator system , 2018 .

[8]  Xing Zhang,et al.  Influence of different cooling methods on thermoelectric performance of an engine exhaust gas waste heat recovery system , 2016 .

[9]  L. Bell.  Cooling, Heating, Generating Power, and Recovering Waste Heat with Thermoelectric Systems , 2008, Science.

[10]  Bihong Lin,et al.  Optimal design of a multi-couple thermoelectric generator , 2000 .

[11]  Srinath V. Ekkad,et al.  Simulation of thermoelectric-hydraulic performance of a thermoelectric power generator with longitudinal vortex generators , 2015 .

[12]  Tinggang Zhang,et al.  Integrating material engineering with module design optimization: A new design concept for thermoelectric generator , 2018 .

[13]  Ryosuke O. Suzuki,et al.  Mathematical simulation of thermoelectric power generation with the multi-panels , 2003 .

[14]  Seeram Ramakrishna,et al.  A review on the enhancement of figure of merit from bulk to nano-thermoelectric materials , 2013 .

[15]  Gequn Shu,et al.  Comparison and parameter optimization of a two-stage thermoelectric generator using high temperature exhaust of internal combustion engine , 2014 .

[16]  Lin Zhu,et al.  Analysis on optimal heat exchanger size of thermoelectric cooler for electronic cooling applications , 2013 .

[17]  Ting Ma,et al.  Experimental investigation on thermoelectric generator with non-uniform hot-side heat exchanger for waste heat recovery , 2017 .

[18]  S. Cecchi,et al.  Review of thermoelectric characterization techniques suitable for SiGe multilayer structures , 2015 .

[19]  Ying Li,et al.  A Review on Organic Polymer-Based Thermoelectric Materials , 2017, Journal of Polymers and the Environment.

[20]  Hohyun Lee,et al.  Technical and economic analysis of thermoelectric modules with macroporous thermoelectric elements , 2017 .

[21]  Jianlin Yu,et al.  A numerical model for thermoelectric generator with the parallel-plate heat exchanger , 2007 .

[22]  Jintu Fan,et al.  Thermal resistance matching for thermoelectric cooling systems , 2018, Energy Conversion and Management.

[23]  Jintu Fan,et al.  Personal thermal management using portable thermoelectrics for potential building energy saving , 2018 .

[24]  Yingjun Liu,et al.  Chemically doped macroscopic graphene fibers with significantly enhanced thermoelectric properties , 2018, Nano Research.

[25]  Srinath V. Ekkad,et al.  Numerical study on thermoelectric–hydraulic performance of a thermoelectric power generator with a plate-fin heat exchanger with longitudinal vortex generators , 2017 .

[26]  B. Ohara,et al.  Influence of electrical current variance and thermal resistances on optimum working conditions and geometry for thermoelectric energy harvesting , 2013 .

[27]  G. Shu,et al.  Comparison and parameter optimization of a segmented thermoelectric generator by using the high temperature exhaust of a diesel engine , 2015 .

[28]  Asfaw Beyene,et al.  Heat recovery from automotive engine , 2009 .

[29]  M. Kanatzidis,et al.  Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals , 2014, Nature.

[30]  Frédéric Lesage,et al.  Net thermoelectric generator power output using inner channel geometries with alternating flow impeding panels , 2014 .

[31]  HoSung Lee,et al.  Optimal design of thermoelectric devices with dimensional analysis , 2013 .

[32]  Jingyi Chen,et al.  High thermoelectric properties of (Sb, Bi)2Te3 nanowire arrays by tilt-structure engineering , 2018, Applied Surface Science.