Coupled experimental and numerical study of innovative nanofluids: from characterization to their performances in a prototype of heat exchanger

创新纳米流体的实验和数值耦合研究：从热交换器原型的表征到性能

• 批准号: 500415-2016
• 负责人: Poncet, Sébastien
• 金额: $ 2.89万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=662414
• 关键词: Coupled; experimental; numerical; study; innovative

Sigma Energy Storage (SES) Inc. has recently developed a prototype for the storage of electrical energy issue of overproduction from the network or from renewable sources. This energy is stored in two forms: compressed air and thermal energy. This second form involves a heat exchanger formed by two concentric tubes with compressed air on one side and a microfluid developed specifically for this application by SES. This project concerns the optimization of this exchanger and of the micro-/ nanofluid for a better transfer of thermal energy during the phases of storage and return of energy. The main disadvantage of microfluid is their propensity to clump and settle, thus losing any interest and resulting in greater consumption of the pump. This may also occur for nanofluids poorly or not functionalized. The project is divided into 4 actions ranging from the synthesis of nanoparticles, to the preparation and characterization of the thermophysical properties of nanofluids, to the dynamic study of these nanofluids in a finely instrumented heat exchanger developed at the University and its optimization by direct numerical simulations. By controlling the whole chain, the objective is to identify the nanofluid being both the most efficient in terms of heat capacity and thermal conductivity and the most stable, i.e. whose properties remain constant after a large number of cycles (24000 cycles for the prototype). This mixed 500 kW storage unit should make it possible to restore energy for about 20 hours at very low cost 0.05 CAD per kWh per cycle and turns out perfectly suited for remote areas (Northern) or dangerous areas (war) by examples.******

Sigma Energy Storage (SES) Inc.最近开发了一种原型，用于存储网络或可再生能源生产过剩问题的电能。这种能量以两种形式存储：压缩空气和热能。第二种形式涉及由两个同心管形成的热交换器，一侧带有压缩空气，以及 SES 专门为此应用开发的微流体。该项目涉及优化该交换器和微/纳米流体，以便在能量存储和返回阶段更好地传递热能。微流体的主要缺点是它们易于结块和沉降，从而失去任何兴趣并导致泵的消耗更大。对于功能不良或未功能化的纳米流体也可能发生这种情况。该项目分为 4 个行动，从纳米颗粒的合成，到纳米流体热物理性质的制备和表征，再到在大学开发的精密仪器热交换器中对这些纳米流体进行动态研究，并通过直接数值模拟进行优化。通过控制整个链条，目标是确定纳米流体在热容量和导热性方面最有效，并且最稳定，即其特性在大量循环后（原型为 24000 次循环）后保持恒定。这种混合 500 kW 存储单元应该能够以非常低的成本（每个周期每千瓦时 0.05 加元）恢复能量约 20 小时，并且通过示例证明非常适合偏远地区（北部）或危险地区（战争）。*** ***