论文标题
高效且负担得起的热磁材料，用于收集低级废热
Efficient and affordable thermomagnetic materials for harvesting low grade waste heat
论文作者
论文摘要
工业过程释放了大量的废热，可以收获以发电。目前，低级废热向电力的转化仅依赖于热电材料，但这种材料昂贵，并且热力学效率低。尽管热磁材料可能提供了有希望的替代方案，但它们的性能仍有待评估，从而阻碍了他们的现实应用。在这里，我们评估了热磁材料的效率和成本效益，这些材料可用于电动机，振荡器和发电机将废热转换为电力。我们的分析表明，达到几个10 K的温度差异最佳的热磁材料的表现优于热电材料。重要的是，我们发现某些热磁材料的每瓦价格与当今的热电学相比要低得多，并且可以与常规发电厂竞争。我们这里提供的材料库可以选择最佳可用的热磁材料来收集废热，并为其未来的开发提供指南。
Industrial processes release substantial quantities of waste heat, which can be harvested to generate electricity. At present, the conversion of low grade waste heat to electricity relies solely on thermoelectric materials, but such materials are expensive and have low thermodynamic efficiencies. Although thermomagnetic materials may offer a promising alternative, their performance remains to be evaluated, thereby hindering their real-world application. Here we evaluate the efficiency and cost effectiveness of thermomagnetic materials that can be used in motors, oscillators and generators for converting waste heat to electricity. Our analysis reveals that up to temperature differences of several 10 K the best thermomagnetic materials outperform thermoelectric materials. Importantly, we find that the price per watt for some thermomagnetic materials are much lower compared to present-day thermoelectrics and can become competitive with conventional power plants. The materials library that we present here enables the selection of the best available thermomagnetic materials for harvesting waste heat and gives guidelines for their future development.
