Abstract
Modern automobiles provide several opportunities for potential application of novel heat engines, including air conditioning, waste-heat recovery, auxiliary power units, and motive power. The driving force behind these potential applications is the prospect of reducing the vehicle’s environmental impact by increasing its overall thermal efficiency, decreasing its emissions of greenhouse gases, or both. However, because the automotive sector is mature and highly competitive, any attempt to displace existing technology faces daunting hurdles. Weight and packaging impose tight constraints. Compatibility with existing systems is essential. Reliability must be ensured, often for 150<th>000 miles. Last but not least, cost is paramount in an industry where pennies matter. Some implications of these factors for implementation of thermoacoustic heat engines on passenger vehicles will be surveyed.
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