Heat rejection and heat recovery

从微电子到工业加工再到太阳辐射，热在当今社会无处不在。随着新产品产生更大的热负荷，以及社会寻求扩大对太阳能的使用，这些热源的热转换和管理是一个日益增长的研究领域。事实上，单相热管理策略正在被两相热交换器取代，以实现精确的温度控制和其他实际原因，如尺寸和重量减轻。然而，由于多相热流体机制的融合，缺乏可靠的预测与核态沸腾相关的传热率的能力。因此，需要对潜在机制有更深入的了解，以协助设计和优化新的热管理战略。 本程序的目的是扩展毛细方程对倾斜核沸腾和电场中气体形成的预测能力，将热电效应应用于多相体系，并将太阳辐射热转换为电能。在加深我们对静电力对气泡演化影响的理解时，可能会发展出更准确地预测电场的传热控制的模型。这项工作的影响倾向于换热器的设计，其成核位置是倾斜的，其换热速率是通过电场和流体之间的电流体相互作用来被动控制的。这项工作的动机是提高工业过程的效率和运行能力。在这种能力下，本研究计划将多阶段热管理策略扩展到远程电子设备，由于行业限制，这些设备通常仅限于单相热扩散技术。针对这一问题将提出新的热电解决方案，为加拿大信息技术和通信行业提供轻量化和可靠的热交换器的发展轨迹。此外，还将探索新的太阳辐射热回收技术，努力走向最丰富的热源--太阳能的高效热电转换技术。

Heat is omnipresent in today's society from microelectronics to industrial processes to solar radiation. Thermal conversion and management of these heat sources is a growing field of study as new products generate greater heat loads and as society looks to expand its use of solar energy. Indeed, single phase thermal management strategies are being replaced with two-phase heat exchangers for precision temperature control and for other practical reasons such as size and weight reduction. However, there lacks reliable predictive capabilities of the heat transfer rates associated with nucleate boiling due to the coalescence of multiphase thermal fluid mechanisms. Greater insight into the underlying mechanisms is therefore required to assist in the design and optimization of novel thermal management strategies. The purpose of the present program is to extend the predictive capabilities of the Capillary equation for inclined nucleate boiling and for gas formations in an electric field, to apply the thermelectric effect to multiphase systems and to convert the heat of solar radiation to electricity. In improving our understanding of the effect of electrostatic forces on bubble evolution, models more accurately predicting the heat transfer control of an electric field may be developed. The impact of this work gravitates towards heat exchanger designs for which nucleation sites are on an incline and for which the heat transfer rate is passively controlled through the electrohydrodynamic interaction between an electric field and a fluid. The motivation for this work is to improve efficiency and the running capacity of industrial processes. In this capacity, the present research program will extend the multiphase thermal management strategies to remote electronic devices that are typically limited to single phase heat diffusion techniques due to industry restrictions. Novel thermoelectric solutions to the problem will be presented providing a trajectory to light weight and reliable heat exchangers for the topical Canadian Information Technology and Communication industry. Furthermore, novel solar radiation heat recovery techniques will be explored in an effort to move towards an efficient thermoelectric conversion technique of the most abundant source of heat, solar thermal energy.