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IRJET- Modelling and Optimization of Heat Transfer Coefficients for Hot and Cold Sides of Thermoelectric Generator (TEG) System
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IRJET- Modelling and Optimization of Heat Transfer Coefficients for Hot and Cold Sides of Thermoelectric Generator (TEG) System
1.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 R. Elankovan1, S. Suresh2, K Karthick3 123 Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu, India. ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract –The race for exploring alternative energysource to replace the dependency of fossil fuels based energy is gaining significant attention due to the rise of globalwarming and other emission issues. Thermoelectric generator (TEG) is emerging as a promising member in alternative energy sources to restrict the consumption of fossil fuel for some extent. The advent of TEG to recover waste heat is a momentous in industrial applications. However, the thermal system of TEG for heat recovery applications need to be optimized to make it a viable option. This paper presents the impact of heat transfer coefficients (HTC) on the performance of TEG through simulation works carried out in ANSYS 17®. The impact of HTC on the hot side and cold side temperature of TEG couple is studied by varying heat source and heat sink temperatures for optimizing the performance of TEG. The results presented shows that the voltage and temperature difference will be higher with increase in cold side HTC rather than increasing hot side HTC. The percentage difference in voltage as well as for temperature is same for a set of hot side and cold side heat transfer coefficient. The maximum power output is generated for each heat transfer coefficient at a matched load resistivity of 0.00015 Ωm. In this study, the power output reaches saturation with increaseinhotsideheat transfer coefficient while the cold side heat transfercoefficient is approximately 50 times higher than that of hot side heat transfer coefficient. The drop in the voltage and difference in temperature also increases with increase in heat source temperature and heat sink temperature. Keywords: Thermal System Configuration, Heat Transfer Coefficient, Heat Source and Sink Temperature and Thermo electric generator (TEG) 1.INTRODUCTION The requisite for development of alternative energy sources to reduce the fossil fuel consumption has attained topmost priority to reduce the impact of emission of fossil fuel. The sole dependency of fossil fuel for power generation over the years has resulted in global warming, ozone depletion and other environmental degradation issues. The above said problem is the challenge for which there isan exorbitantrise of research interest is seen in the field of renewable energy over the last few years. At this context TEG acts as a promising member in the field of energy recovery. Although TEGs performance is greatly restricted due to less conversion efficiency, TEGcontinues to dominate inthefield of waste heat recovery. Research suggests that 60% of the total energy is wasted in the form of heat which is in the form of low grade heat energy [1]. The application of TEG in converting waste heat into power output has gained attention all over the world and the research interest in this field has increased significantly over the last three decades. A thermoelectric generator (TEG) is a solid-state device, which can directly convert heat into electricity which is based on the discovery of Seebeck effect by which temperature difference is directly converted into heat. The heat to electricity conversion has an efficiency of less than 5% [2-3]. Therefore, the concern on improving the conversion efficiency of TEG is vital to use it as a viable tool to recover waste heat. The dominance of TEG on par with other sources of energy lies in the utilization of costless waste heat as energy input which makes it suitable for applications which are not affected by its low conversion efficiency [4]. The various applications of TEG range from recovering waste heat from fossil fuel fired boilers, automobile exhaust [5-9] to industrial operations such as biomass boiler [10], small scale pellet boiler [11], cement plants, marine waste incinerator [12], refineries, glass manufacturing, and foundries. Other areas of implementation include wood burning stoves [13], geothermal sites, solar salt ponds and solar concentrators [14]. The ill effects of fossil fuel burning can be mitigated and minimized to an extent by the effective introduction of the thermoelectric generators. The reliability of the thermoelectric effect in the electrification of waste heat has been validated by experiments conducted for different industrial process. The literature in the past indicates that the power output from TEG is directly proportional to the temperature difference between the hot and coldfacesofthe TEG. In a TEG thermal configuration system, the hotandcold face temperatures depend on the heat transfer coefficients on the respective sides. This paper emphasis the impact of variation in heat transfer coefficients on hot andcoldsidesof TEG through simulation using ANSYS 17® multi-physics software. Modelling and Optimization of Heat Transfer Coefficients for Hot and Cold Sides of Thermoelectric Generator (TEG) system © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1174
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 2. COMPUTATIONALMODELLINGANDBOUNDARY CONDITIONS 2.1.TEG model The thermoelectric generator module contains of p and n type semiconducting materials which are connected electrically in series and thermally in parallel. In this case a pair of thermocouple isconsidered for simulation. A single p and n junction pair of a TEG with 97couples is analysed. The Thermo-electric Multi-physics simulation is modelled and simulated in3DusingANSYS17®. Thematerialpropertiesof the TEG Couple is given in Table 1. Table 1: Material Properties of the TEG couple S No Description Value 1 Thermal conductivity of top and bottom copper bar 401 W/m°C 2 Resistivity of top and bottom copper bar 2.27X10-8 Ωm 3 Thermal conductivity of P-Junction 2.3 W/m°C 4 Resistivity of P-Junction 1.64X10-5 Ωm 5 Seebeck Coefficient of P-Junction 0.00022 V/°C 6 Thermal conductivity of N-Junction 2.3 W/m°C 7 Resistivity of N-Junction 1.64X10-5 Ωm 8 Seebeck Coefficient of N-Junction -0.00022 V/°C 2.2. Governing equation Accounting thecoupling mechanisms of Seebeck, Peltierand Thomson effects on TEG system between electrical and thermal fields, a fully coupled field model is developed by generating governing equations under steady-state conditions for both electrical potential profiles and temperature in the absence of input magnetic field [26]. By taking Joule heating into account in the process, the equation for energy conservation is given by (9) Now, applying thermoelectric effectintocouplingofheatflow equation and electric charge continuity equation, (10) Where J is the electric current density vector. Above twoequationsarecoupled bythe setofthermoelectric constitutive equations (11) (12) Where, [σe] = electrical conductivity matrix [k] = thermal conductivity matrix [α] = Seebeck coefficient matrix [Π] = T[α] is the Peltier coefficient matrix As per model, in the absence of time varying magnetic field, E will become irrotational and derived from an electric scalar potential (ϕ) (13) Hence, electric power expression is given by (14) For obtaining maximum electric power, RL = Rteg The basic set of thermoelectric equations of TEG determines the five state vector parameters Qh, Qc, Th, Tc andIo.Nowfor any change in operation condition, TEGs will shift to a new stage for balancing the equations. When the state vector stabilizes, poweroutputandconversion efficiencyvaluesare obtained. The equationsdescribedin the previoussectionare solved using the ANSYS which is the commercial software based on the finite element method and is applicable to multiphysics problems [13]. 2.3. Mesh and the Boundary Conditions A pair of p and n junction of TEG is employed for simulation. A 3D structured mesh and a fine mesh are applied over the entire area of TEG couple. The 3D mesh in an isometric view of TEG p and n junction is shown in Fig.1 where individual components are labelled and respective dimensions of TEG couple are also mentioned in mm. The boundary conditions for TEG couple is discussed in Table 2. Fig. 1: Mesh of TEG Couple © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1175
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 Table 2: Boundary conditions of the TEG couple S No Description Value 1. Resistivity of Electric Load (ρ) 1X10-6 to 1X10-3 Ωm 2. Heat Transfer coefficient of TEG hot side (hhs) 10 to 5000 W/m2C 3. Heat Transfer coefficient of TEG cold side (hcs) 10 to 5000 W/m2C 4. Hot source Temperature (Ths) 100 to 200 ˚C 5. Heat sink Temperature (Tcs) 25 to 50 ˚C 6. Ground on N-Junction bottom copper bar (Vo) 0 mV 3. SIMULATION RESULTS 3.1 Effect of heat transfercoefficientonhotandcold side of TEG couple for open circuit condition The effect of heat transfer coefficient on hot and cold side of TEG couple is studied through simulation considering the following input conditions. The heat source temperature is kept constant temperature of 200 °C, with heat sink exposed to ambient temperature of 30 °C for the same 1.5 mm x 1.5 mm square size of the p-type and n-type junction legs of length 2.5 mm. The thermal conductivity of TEG is assumed as2.3W/m°C. Theinfluence of hotandcoldsideheattransfer coefficient on opencircuit voltage is studied by constant low cold side heat transfer coefficient of 10, 50, 100, 500, 1000, 5000W/m2Cfor different hot side heattransfercoefficientof 10, 50, 100, 500, 1000, 5000 W/m2C. The maximum heat transfer coefficient (5000 W/ W/m2C) is simulated to evaluate the performance at high heat transfer coefficient values, theapplication ofTEGat high heattransfercoefficient accountsforcomplexity of thethermalconfiguration system. However, the results were in accordance with practical heat transfer coefficient cases. The effect of hot side and cold side heat transfer coefficients are observed in TEG couple for open circuit condition. The effect of heat transfer coefficient in hot side and cold side temperature for open circuit simulations is shown in Fig. 2a. The open circuit voltage produced for varying hot side heat transfer coefficients for a low cold side heat transfer coefficient of 10W/m2 °CisshowninFig. 2b. Theopencircuit voltagegeneratedforhotsideheattransfercoefficientsof10, 50, 100, 500, 1000, 5000 W/m2C is 0.43523, 0.76123, 0.83987, 0.91553, 0.92595, 0.93447 mV respectively for a minimum cold side heat transfer coefficient of 10 W/m2C. Similarly, theopencircuitvoltage producedforcoldsideheat transfer coefficients of 10, 50, 100, 500, 1000 W/m2C is 0.8029, 3.8237, 7.2186, 24.916, 35.926 55.569 mV for a minimum ofhot side heattransfercoefficient of 10W/m2C.It can beinferred thatthe opencircuitvoltagepeakedavalueof 55.569 mV for a heat transfer coefficient of 5000 W/m2C at coldsidewitha minimum heattransfercoefficientathotside. Similarly, the voltage rise achieved a maximum value of 0.93447 mV fora heat transfer coefficient of 5000 W/m2C at hot side with a minimum heat transfer coefficient at cold side. This illustrates that for a given minimum cold side heat transfer coefficient, the increase in voltageand temperature differenceis lesserwhen compared to higher hot side heat transfer coefficients for various cold side heat transfer coefficients. The percentage difference in voltage and temperature difference for set of hot side and cold side heat transfer coefficient is more or less the same. It can be observed that the voltageand temperature difference is higher byincreasingcold sideheattransfer coefficient.The open circuit temperature contours of TEG couple for typical set hot side and cold side heat transfer coefficients is shown in Fig. 3 and the open circuit voltage contours of TEG couple for typical sethot sideandcoldside heat transfercoefficients is shown in Fig. 4. Fig. 2a: Effect of hot side heat transfer coefficients on differenceintemperaturesbetween hotandcoldsidesofTEG fora coldsideheat transfercoefficient of 10W/m2 °Cin open circuit. © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1176
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 Fig. 2b: Effect of hot side heat transfer coefficients on open circuit voltage for a cold side heat transfer coefficient of 10 W/m2 °C (a) (b) (c) (d) Fig. 3: Temperature Contours of TEG couple with open circuit at (a) hhs-10W/m2C and hcs- 10W/m2C, (b) hhs- 10W/m2C and hcs-5000W/m2C, (c) hhs-5000W/m2C and hcs-10W/m2C and (d) hhs-5000W/m2C and hcs- 5000W/m2C. (a) (b) (c) (d) Fig.4:OpencircuitvoltageContours ofTEGcoupleat(a)hhs- 10W/m2C and hcs- 10W/m2C, (b) hhs-10W/m2C and hcs- 5000W/m2C, (c)hhs-5000W/m2Candhcs-10W/m2Cand(d) hhs-5000W/m2C and hcs-5000W/m2C. 3.2 Effect of convective heat transfer coefficients on output power for varying resistivity of TEG couple: The performance of TEG power output due to the effect of electrical load resistivityfortypicalset hotsideandcold side heat transfer coefficients is shown in Fig. 5 to Fig. 9. The fluctuations thatoccur duringthe powergenerationis dueto the Seebeckco-efficientbecause duringthesimulation itwas assumed to be constant where actually it depends on the temperature. It was observed that the power output of the TEG increases with the increase in heat transfer coefficient between the twosides.The poweroutputofTEGismaximum at the matched load resistivity. From the study, the matched load resistivity is found to be 0.00015 Ωm. Therefore, the maximum power output is generated for each heat transfer coefficient with a highest individual value at matched load resistivity (0.00015 Ωm). The minimum value of all is 1.07 µW for which the hot side heat transfercoefficient(hhs)is10W/m2Candcoldsideheat transfer coefficient (hcs) is10 W/m2C. Similarly, the maximumvalue ofallis 23395µW forhhs=5000W/m2Cand hcs=5000 W/m2C. Fig. 5: Behaviour of thermoelectric power for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 10 W/m2C Fig. 6: Behaviour of thermoelectric power for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 50 W/m2C © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1177
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 Fig. 7: Behaviour of thermoelectric power for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 100 W/m2C Fig. 8 Behaviour of thermoelectric power for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 500 W/m2C Fig. 9: Behaviour of thermoelectric power for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 1000 W/m2C The TEG power output is plotted for hot side heat transfer coefficient with respect to cold side heat transfer coefficient conditions and for cold side heat transfer coefficient with respect to hot side heat transfer coefficient condition is shown in Fig. 10 to Fig. 14. The graphical abstract follows a common syntax in considering hot side heat transfer coefficient varying in x-axis for solid-line plots and cold side heat transfercoefficientvaryingin x-axisfordotted-lineplots. The results figure out that for the same applied electric load, the increase in power output is more when there is an increase in the heat transfer coefficient on the cold side rather thancompared toincreasein heat transfercoefficient hot side. It is observed that the TEG power output will not have any significant increase with the increase of heat transfer coefficient after a certain extent. Fig. 10 shows that for all electrical load resistivity the percentage of power output obtained by fixing cold side heat transfer coefficient 10 W/m2C. Thehotsideheat transfercoefficient50W/m2Cis 26 % approximately higher than that of fixing hot side heat transfer coefficient 10 W/m2C, cold side heat transfer coefficient 50 W/m2C. The percentage increase of power output obtained by fixing cold side heat transfer coefficient 10 W/m2C, hot side heat transfer coefficient 5000 W/m2C is 44 % approximately higher than that of fixing hot side heat transfer coefficient 10 W/m2C, cold side heat transfer coefficient 5000 W/m2C. While fixing hot side and cold side heat transfer coefficient at 10 W/m2C, the power output obtainedby hot sideandcoldsideheat transfercoefficientat 500 W/m2C is approximately 79 % higher and there is no significant improvement in power output for more than 500 W/m2C in this case. Hence, it is significant that the power output reachessaturationinincreasinghotsideheattransfer coefficient whereas the cold side heat transfer coefficient is approximately 50 times higher than that of hot side heat transfercoefficient. Inall the othercases, thepower outputis influenced by both cold side and hot side heat transfer coefficient follow same trend as before. The closed circuit temperature contours of TEG couple for typical set hot side and cold side heat transfer coefficients is shown in Fig. 15, also the closed circuit voltage contours of TEGcouplefor typical sethot sideandcoldside heat transfer coefficients is shown in Fig. 16. The closed circuit total current density vector of TEG couple for typical set hot side and cold side heat transfer coefficients is shown in Fig. 17. © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1178
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 Fig.10: Comparison of effect on TEG power output for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 10 W/m2C. Fig. 11: Comparison of effect on TEG power output for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 50 W/m2C. Fig. 12: Comparison of effect on TEG power output for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 100 W/m2C. Fig.13: Comparison of effect on TEG power output for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 500 W/m2C. © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1179
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 Fig. 14: Comparison of effect on TEG power output for varying heat transfer coefficients of cold/hot side and corresponding hot/cold side at 1000 W/m2C. (a) (b) (c) (d) Fig. 15: Temperature Contours of TEG couple with closed circuit at (a) hhs-10W/m2C and hcs- 10W/m2C, (b) hhs- 10W/m2C and hcs-5000W/m2C, (c) hhs-5000W/m2C and hcs-10W/m2Cand(d)hhs-5000W/m2Candhcs-5000W/m2C. (a) (b) (c) (d) Fig. 16: Closed circuit voltage Contours of TEG couple at (a) hhs-10W/m2Cand hcs- 10W/m2C, (b)hhs-10W/m2Candhcs- 5000W/m2C, (c)hhs-5000W/m2Candhcs-10W/m2Cand(d) hhs-5000W/m2C and hcs-5000W/m2C. (a) (b) (c) (d) Fig. 17: Closed circuit Total current density vectors of TEG couple at (a) hhs-10W/m2C and hcs- 10W/m2C, (b) hhs- 10W/m2C and hcs-5000W/m2C, (c) hhs-5000W/m2C and hcs-10W/m2Cand(d)hhs-5000W/m2Candhcs-5000W/m2C. © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1180
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 3.3 Effect of heat source and heat sink temperature of TEG couple The effect of heat source and heat sink temperature of TEG couple are studied through simulation considering the following input conditions. The hot side and cold side heat transfer coefficient considered are (hhs/hcs in W/m2C) 10/10,10/5000,5000/10 and 5000/5000 and the same square size of the p-type and n-type junction legs of 1.5 mm and the length of both the junction’s legs are 2.5 mm. The thermal conductivity of TEG is assumed to be at 2.3 W/mC. Here, theinfluence ofheatsource andheatsink temperature on open circuit voltage and TEG power output is studied. 3.3.1 Effectof heat source and heat sink temperature of TEG couple for open circuit condition The effect of heat source and heat sink temperature on and hot and cold side temperature of TEG couple is shown in Fig. 19 (a). The effect of heatsourceand heatsink temperatureon open circuitvoltage is shown inFig. 19(b). Itcanbeobserved that, for low heat source temperature, at different heat sink temperature, the dropinvoltageandtemperature difference is more when compared to higher heat source temperature for variousheat sinktemperature. The percentage difference in both voltage and temperature for set of heat source and heat sink temperature is more or less the same. It can be observed that the drop in the voltage and temperature differenceis higher byincreasingbothheat sinktemperature especially heat source temperature. Fig. 19 (a): Effect of heat source and heat sink temperature on hot and cold side temperature of TEG couple. Fig. 19 (b): Effect of heat source and heat sink temperature on open circuit voltage of TEG couple. 3.3.2 Effectof heatsource and heatsinktemperatureof TEG couple for closed circuit condition Theimpact ofTEG power output due to the effect of electrical load resistivity for typical set heat source and heat sink temperature is given by Fig. 20 to Fig. 23. It is observed that the power output of the TEG increases with the increase in heat source temperature and the power output is maximum at the matched load resistance. From the study, the matched load resistivityisfound tobe 0.00015Ω-m. Itis notedthatthe power outputatheat sourcetemperature of 200 °C isaround 80 % higher than that at 100 °C when heat sink temperature is 25°C for a fixed heat transfer coefficient. Now, when heat sink temperature is increased to 50 °C, the percentage of power output is increased to 88% due to the influence of decrease in heat sink temperature with an increased source temperature. The percentage drop in power output at different heat sink temperature (Max 50 °C, Min 25 °C) is around 56 % at heat source temperature of 100 °C and the same is reduced to 14 % at the heat source temperature of 200 °C. This leads to the conclusion that, when the heat source temperature increases, there is no significant influence of heat sink temperature on TEG power output. Fig. 20: Effect of TEG power output due to Electrical load resistivityfor differentheatsource/heat sinktemperatureat hot/cold side heat transfer coefficient (10/10 W/m2C) © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1181
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 Fig. 21: Effect of TEG power output due to Electrical load resistivityfor differentheatsource/heat sinktemperatureat hot/cold side heat transfer coefficient (5000/500 W/m2C) Fig. 22: Effect of TEG power output due to Electrical load resistivityfor differentheatsource/heat sinktemperatureat hot/cold side heat transfer coefficient (10/5000 W/m2C) Fig. 23: Effect of TEG power output due to Electrical load resistivityfor differentheatsource/heat sinktemperatureat hot/cold side heat transfer coefficient (5000/10 W/m2C) Here, the influence of hot/coldside heat transfercoefficients impactingon voltageand power outputarestudied.Andalso, the impact of heat source/heat sink temperature on voltage and poweroutputarestudied. Thisconceptis tobeappliedin thermal system configuration through literature study. 3. CONCLUSIONS The importance of hot side and cold side heat transfer coefficients for TEG systems, in delivering the best performance is highlighted in this paper. Based on the simulation carried out by ANSYS 17®, the following results are concluded: 1. For a given low cold side heat transfer coefficient, increase in voltage and temperature difference is lesser when compared to higher hot side heat transfer coefficients for various cold side heat transfer coefficients. 2. For a set of hot side and cold side heat transfer coefficient, the percentage difference in voltage as well as for temperature will be almost the same. 3. As cold side heat transfer coefficient increases, the voltage and temperature difference will be higher. 4. The maximum power output is generated for each heat transfer coefficient with a highest individual value at matched load resistivity of 0.00015 Ωm. 5. When the cold side heat transfer coefficient is approximately 50 times higher than that of hot sideheat transfer coefficient, the power outputreachessaturation with increase in hot side heat transfer coefficient. 6. As heat source temperature and heat sink temperature is increased, the drop in the voltage and difference in temperature also increases. 7. When the heat source temperature increases,thereisno significant impact on TEG power output by the heatsink temperature. 4. NOMENCLATURE ZT = ‘Figure of merit’ of TEG α = Seebeck coefficient of TEG couples in V/K σ = Electrical conductivity of TEG couples in S/m k = Thermal conductivity of TEG couples in W/mK. hhs= TEG hot side Heat side heat transfer coefficient in W/m2C hcs= TEG cold side Heat side heat transfer coefficient in W/m2C Ths = Heat source temperature in °C Tcs = Heat sink temperature in °C Th = TEG hot side temperature in °C Tc = TEG Cold side temperature in °C ρ = Resistivity of Electric Load in Ωm Vo = Ground on N-Junction bottom copper bar in mV VOC = Open circuit Voltage in mV PTEG = TEG Power Output in µW © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1182
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of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 www.irjet.net p-ISSN: 2395-0072 REFERENCES [1] Ohta H, Sugiura K, Koumoto K. Recent Progress in Oxide Thermoelectric Materials: p-Type Ca3Co4O9 and n- Type SrTiO3. Inorg Chem 2008; 47 (19); 8429–36. [2] Rowe DM, Bhandari C. Modern thermoelectrics. Prentice Hall; 1983. [3] Rowe DM, Min G. Evaluation of thermoelectric modules for power generation. J Power Sources 1998; 73 (2); 193–8. [4] Riffat SB, Ma X. Thermoelectrics: a reviewofpresent and potential applications. Appl Therm Eng 2003; 23 (8);913–35. [5] Hsiao YY, Chang WC, Chen SL. A mathematic model of thermoelectric module with applications on waste heat recovery from automobile engine. Energy 2010; 35(3); 1447–54. [6] Hsu C-TY, Da-Jeng Ye, Ke-Jyun Yu, Ben. Renewable energy of waste heat recovery system for automobiles. J Renew Sustain Energy 2010; 2(1);013105. [7] Ikoma KM, Furuya M, Kobayashi K, Komatsu M, Shinohara K. Thermoelectric generator for gasoline engine vehicles using Bi2Te3 modules. J Jpn Inst Met 1999; 63(11);1475–8 [Special Issue on Thermoelectric Energy Conversion Materials]. [8] Schlichting AD, Anton SR, Inman DJ. Motorcycle waste heat energy harvesting. In: The 15th International Symposium on: Smart Structures and Materials & Non- destructive Evaluation and Health Monitoring. 2008. International Society for Optics and Photonics. [9] Takanose E, Tamakoshi H. The development of thermoelectric generator for passenger car. In: Proc 12th International Conference on Thermoelectrics. Yokohama, Japan, 1993. [10] Brazdil M, Pospisil J. Thermoelectric power generation utilizing the waste heat from a biomass boiler. J Electron Mater 2013; 42(7); 2198–202. [11] Moser WF, Günther Haslinger, Walter Hofbauer, Hermann. Small-scale pellet boiler with thermoelectric generator. In: Thermoelectrics, 2006. ICT’06. 25th International Conference on. IEEE, 2006. [12] Kristiansen NR, Snyder GJ, Nielsen HK, RosendahlL. Waste heat recovery from a marinewasteincineratorusinga thermoelectric generator. J Electron Mater 2012; 41 (6); 1024–9. [13] Champier D, Bedecarrats JP, Rivaletto M, Strub F. Thermoelectric power generation from biomasscookstoves. Energy 2010; 35(2); 935–42. [14] Moh'd A AN, Tashtoush BM, KhasawnehMA,Al-Keyyam I. A Hybrid Concentrated Solar Thermal Collector/Thermo- Electric Generation System. Energy. 2017 Jun 17. [15] Dresselhaus MS, Chen G, Tang MY, Yang RG, Lee H, Wang DZ, et al. New directions for low-dimensional thermoelectric materials. Adv Mater 2007; 19 (8); 1043–53. [16] Snyder GJ, Toberer ES. Complex thermoelectric materials. Nat Mater 2008; 7 (2); 105–14. [17] Hsu KF, Loo S, Guo F, Chen W, Dyck JS, Uher C, et al. Cubic AgPbmSbTe2+m: bulk thermoelectric materials with high figure of merit. Science 2004; 303 (5659); 818–21. [18] Poudel B, Hao Q, Ma Y, Lan Y, Minnich A, Yu B ,et al. High-thermoelectric performance of nanostructured bismuth antimony telluride bulk alloys. Science 2008; 320(5876); 634–8. [19] Boukai AI, Bunimovich Y, Tahir-Kheli J, Yu J-K, Goddard IiiWA, Heath JR, et al. Silicon nanowires as efficient thermoelectric materials.Nature 2008; 451 (7175);168–71. [20] Hochbaum AI, Chen R,Delgado RD, LiangW,Garnett EC, Najarian M, et al. Enhanced thermoelectric performance of rough silicon nanowires.Nature 2008; 451(7175);163–7. [21] Zhao XB, JiXH, Zhang YH, Zhu TJ, Tu JP, Zhang XB, et al. Bismuth telluride nanotubes and the effects on the thermoelectric properties of nanotube-containing nanocomposites. Appl Phys Lett 2005; 86(6); 062111–3. [22] Tang X, Xie W, Li H, Zhao W, Zhang Q, Niino M, et al. Preparation and thermoelectric transportpropertiesofhigh- performance p-type Bi2Te3 with layered nanostructure. Appl Phys Lett 2007; 90(1); 012102–3. [23] A Rezania, K Yazawa, LARosendahl, A Shakouri, Co- optimized design of micro channel heat exchanger and thermoelectric generators, International Journal ofThermal Science, 2013; 72; 73-81. [24] Cheng-TingHsu, Gia-Yeh Huang, Hsu-ShenChu,Ben Yu, Da-Jeng Yao, Experiments and simulations on low- temperature waste heat harvestingsystembythermoelectric power generators, Applied Energy 2011; 88;1291–1297. [25] Xiaolong Gou, Heng Xiao, Suwen Yang, Modeling, experimental study and optimization on low-temperature waste heat thermoelectric generator system,AppliedEnergy 2010; 87; 3131–3136. © 2019, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1183
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International Research Journal
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