Simulation of Fuel Economy Effectiveness of Exhaust Heat Recovery System Using Thermoelectric Generator in a Series Hybrid

Mori, Masayoshi; Yamagami, Takeshi; Sorazawa, Mitsumasa; Miyabe, Takatoshi; Takahashi, Shunji; Haraguchi, Tomohide

doi:10.4271/2011-01-1335

Cited by 73 publications

(29 citation statements)

References 3 publications

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“…Substituting these parameters into equation 8 shows that the potential fuel, CO2 and fuel cost savings is 1.57% when using an exhaust heat recovery system with the same TEG efficiency and heat exchanger efficiency. This compares well with fuel savings claims made by Ford [2] and Honda [3]. …”

Section: Sae-supporting

confidence: 58%

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Experimental testing of a car exhaust heat recovery system utilising TEGs and heat pipes

Orr

Akbarzadeh

2016

VTE-J

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On the left is a schematic of the exhaust heat recovery system and on the right is the full system assembly.Orr, Bradley and Akbarzadeh, Aliakbar RMIT ABSTRACTExhaust heat recovery systems are used to make use of otherwise wasted heat from a car engine. The purpose of exhaust heat recovery systems is to potentially reduce the fuel consumption of the car and consequently reduce CO2 emissions and running costs. The unique system design described herein utilises thermoelectric generators (TEGs) and heat pipes with its key advantage being it is a passive solid state design. The use of heat pipes allows for more flexible designs as the TEG location is not limited to the exhaust pipe surface. Testing was undertaken on a car with a 3.0L V6 engine. The theoretical modeling was shown to be valid at relatively low exhaust temperatures but deviates at higher exhaust temperatures. It is believed that the heat pipes are operating beyond their capacity at higher temperatures so the model deviates. In all test conditions the power loss due to pressure drop in the exhaust duct was always lower than the electrical power output. Repeat tests were conducted and the results were found to be consistent. When testing the system at different orientations, the bottom heat mode was found to be the best option. After all testing, the maximum power output of the system was 38W from the 8 62mmX62mm TEGs used. The rate of heat transfer in this case was 1541W with the resultant TEG efficiency being 2.46%. The calculated potential reduction in CO2 emissions, fuel consumption and fuel costs was 1.57%.Paper Number Vol N, No N (YYYY) SAE-A Vehicle Technology Engineer -Journal (VTE-J)

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Section: Sae-supporting

confidence: 58%

“…Large multinational car companies like BMW [1], Ford [2], Honda [3] and Renault [4] have demonstrated their interest in exhaust heat recovery, developing systems that make use of thermoelectric generators (TEGs). TEGs are heat engines with no moving parts.…”

Section: Introductionmentioning

confidence: 99%

Experimental testing of a car exhaust heat recovery system utilising TEGs and heat pipes

Orr

Akbarzadeh

2016

VTE-J

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“…Nonetheless, if the recovery potential of the cooling, lubrication and exhaust systems is combined, it should be possible to recover a significantly higher amount of energy [23,24]. Major OEMs like Honda [25] and BMW are testing this technology. The latter is making plans to commercialize in the near future a car with TEGs generating up to 1kW (currently 200W), with the aim of 5% fuel savings [26].…”

Section: Motivationmentioning

confidence: 99%

Temperature Controlled Exhaust Heat Thermoelectric Generation

Brito¹,

Martins²,

Gonçalves³

et al. 2012

SAE Int. J. Passeng. Cars - Electron. Electr. Syst.

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“…A valve-controlled bypass is required to prevent overheating of the TEG materials and to avoid an increase of exhaust gas back pressure at high operating loads, which in turn would result in a reduction of engine power (8,9) . The exhaust heat which is transferred into the TEG needs to be dissipated either with a separate cooling circuit (8) , or through integration into the vehicle cooling circuit (10) , in which case a significantly larger radiator size would be required.…”

Section: Thermo Electric Generatorsmentioning

confidence: 99%

Comparison of Advanced Waste Heat Recovery Systems with a Novel Oil Heating System

Will

2013

IJAE

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Latest trends in waste heat recovery include systems like Thermo Electric Generation (TEG), Rankine cycle, and active warm up systems. The advantages and disadvantages of different approaches are critically discussed and compared with a novel and effective oil heating system that can deliver between 7% and 12% reductions of CO 2 emissions and fuel consumption. The comparison includes the expected CO 2 and fuel saving potential related to the legal drive cycle as well as real world driving, effects on regulated exhaust emissions, utilisation of resources, maintenance and service, vehicle performance, comfort, noise, and durability. KEY WORDS: Engine, waste heat recovery, lubrication system, heat transfer [A1] 2. COMPARISON 2.1 Rankine cycle The Rankine cycle is the standard process typically used in power plants to generate electricity from fluids with high temperatures, typically steam. It seems to be obvious to study this process as an option to also recover waste heat from cars. The cycle consists of four different main process changes, that all require a separate dedicated component: A pump increases the pressure of a liquid fluid so that the fluid starts to flow into a heat exchanger, in this case an exhaust gas heat exchanger,

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Simulation of Fuel Economy Effectiveness of Exhaust Heat Recovery System Using Thermoelectric Generator in a Series Hybrid

Cited by 73 publications

References 3 publications

Experimental testing of a car exhaust heat recovery system utilising TEGs and heat pipes

Experimental testing of a car exhaust heat recovery system utilising TEGs and heat pipes

Temperature Controlled Exhaust Heat Thermoelectric Generation

Comparison of Advanced Waste Heat Recovery Systems with a Novel Oil Heating System

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