Browse Publications Technical Papers 2012-01-0411
2012-04-16

Experimental and Modeling Study of a Heat Exchanger Concept for Thermoelectric Waste Heat Recovery from Diesel Exhaust 2012-01-0411

Approximately one-third of the fuel energy consumed by an internal combustion engine flows out the tailpipe as waste heat. Thermoelectric devices are being considered as a means of utilizing some of this waste heat to generate electric power on vehicles. A 1.1-liter volume flat plate heat exchanger was fabricated to study the heat transfer characteristics of a conceptual design for thermoelectric waste heat recovery from diesel exhaust, and used to validate a heat exchanger model. The heat exchanger consisted of an exhaust channel and two coolant channels all having rectangular cross-sections. The experimentally measured heat transfer rates were compared with a finite element heat transfer model to be used both for heat exchanger development and modeling thermoelectric device performance. In both the model and the experiment, alumina paper was used as a surrogate for the thermoelectric materials. The minimum and maximum heat transfer rates calculated from the model were 188 W and 1.89 kW, respectively, and the heat exchanger effectiveness from the model ranged from 0.110 to 0.169 for gas exchange rates from 65.7 s-₁ to 334 s-₁. The measured minimum and maximum heat transfer rates from the experiments were 385 W and 1.45 kW, with effectiveness ranging from 0.079 to 0.258. While there was good trend-wise agreement between the model and experiments, unaccounted for entrance effects and effects of measurement locations likely contributed to the observed differences between the two.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
JOURNAL ARTICLE

Thermodynamic Analysis of a Novel Combined Power and Cooling Cycle Driven by the Exhaust Heat Form a Diesel Engine

2013-01-0858

View Details

TECHNICAL PAPER

Gas-Solid Reaction Heat Exchanger for Vehicle Engine Exhaust Waste Heat Recovery

860588

View Details

TECHNICAL PAPER

On Handling Waste Heat from Waste Heat Recovery Systems in Heavy-Duty Vehicles

2015-01-2792

View Details

X