Packed bed combustion of biomass/liquid mixture combustion

生物质/液体混合物燃烧的填充床燃烧

• 批准号: 1650-2011
• 负责人: Hallett, William
• 金额: $ 1.68万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638422
• 关键词: Packed; bed; combustion; biomass; liquid

This proposal comprises two separate themes, both focussed on combustion of solid and liquid bio-fuels.1. Packed Bed Combustion of Biomass Fuels: Wood and other solid biomass fuels are becoming increasingly attractive as "carbon neutral" energy resources. The packed bed - relatively large pieces of fuel on a grate, with air admission from below - is the most common means of burning or gasifying these fuels, but because of its complexity it is less well understood than most other combustion processes. This proposal continues the development of computational models for the grate combustion of wood and other biomass fuels and the testing of these models by experiments, with the overall objective of providing numerical tools for design and operation. The models and knowledge developed will support the use of wood wastes and other solid biomass as energy resources; they will also be highly relevant to the closely related process of trash incineration.2. Liquid Mixture Combustion: A wide range of liquid biofuels is currently available or under development, including alcohols, biodiesel, and biomass pyrolysis oil ("bio-oil") made from wood, agricultural wastes, and other feedstocks. Design and operation of combustors and engines using these fuels requires detailed computational models of their evaporation and combustion behaviour as droplets and sprays. However, most liquid bio-fuels are complex mixtures with hundreds of different components, far too many to model individually in computer simulations. This project continues work on the "continuous thermodynamics" technique of representing complex mixtures by probability density functions instead of individual species, which allows models for liquid droplet combustion to simulate the chemical composition and distillation behaviour of fuels without excessive computation. The proposal applies this technique to wood pyrolysis oils and other biomass-based alternative liquid fuels.

该建议包括两个独立的主题，都集中在固体和液体生物燃料的燃烧。生物质燃料的填充床燃烧：木材和其他固体生物质燃料作为“碳中性”能源越来越有吸引力。填充床-在炉排上相对较大的燃料块，空气从下面进入-是燃烧或气化这些燃料的最常见方法，但由于其复杂性，它比大多数其他燃烧过程更少被理解。该提案继续发展木材和其他生物质燃料炉排燃烧的计算模型，并通过实验对这些模型进行测试，总体目标是为设计和操作提供数字工具。开发的模型和知识将支持使用木材废料和其他固体生物质作为能源资源;它们也将与垃圾焚烧的密切相关过程高度相关。液体混合物燃烧：目前有多种液体生物燃料可供使用或正在开发中，包括醇、生物柴油和由木材、农业废物和其他原料制成的生物质热解油（“生物油”）。使用这些燃料的燃烧室和发动机的设计和操作需要它们作为液滴和喷雾的蒸发和燃烧行为的详细计算模型。然而，大多数液体生物燃料是由数百种不同成分组成的复杂混合物，太多了，无法在计算机模拟中单独建模。该项目继续致力于“连续热力学”技术，即用概率密度函数而不是单个物质来表示复杂的混合物，这使得液滴燃烧模型能够模拟燃料的化学成分和蒸馏行为，而无需过多的计算。该提案将这种技术应用于木材热解油和其他生物质替代液体燃料。