Investigation of Heat transfer enhancement in Thermal Storage Systems with Phase Change Materials

能源消耗的形式是供热系统的热量和热水在国内和商业建筑代表超过40%的全球能源消耗。热能储存（TES）是有效利用热可再生能源或废热的一个关键方面。与传统系统相比，相变储能系统（PCM）具有更高的储能容量和更紧凑的设计，可以满足上述目的。许多相变材料的主要局限性是它们的低热导率和成本，这些构成了它们潜在应用的主要挑战之一。因此，我们认为，因此，有必要考虑成本效益的方法，将加强与PCM在TES的传热。本项目的目的是调查和寻求最“成本效益”研究提高中低温相变材料导热性能的材料和方法，以控制相变材料的充放电速率。该项目将涉及材料和结构的研究，以优化TES中相变材料和相变材料之间的传热。传热流体，在熔化和凝固过程中的传热研究与增强PCM在低中TES应用，PCM的热物理特性，数值和实验研究，推导出数值无量纲传热相关性和compactTES的设计指南。为高效能工商业污水附加费设计具成本效益的新概念，将可促进住宅和商业楼宇更广泛地使用可再生能源作供暖系统和热水之用。

The energy consumption is in the form of heat for heating systems and hot water in domestic andcommercial buildings represent more than the 40% of the global energy consumption. ThermalEnergy Storage (TES) is a key aspect in efficient use of thermal renewable energy sources orwaste heat. The TES with Phase Change Materials (PCM) can serve the above purpose becauseoffer higher thermal energy storage capacity and compact design, compared to the conventionalsystems. The main limitations of many PCMs are their low thermal conductivity and the cost andthese constitute one of the major challenges for their potential applications. Therefore, it isnecessary to considerate cost-effective methods which would enhance heat transfer in TES withPCM.The aim of this project is to investigate and seek the most "cost-effective" materials and methodsto enhance the thermal conductivity of the low and medium temperature PCM in order to controlthe charging and discharging rates.The project will involve the research on materials and configurations to optimize the heat transferbetween PCM in TES and heat transfer fluid, the study of the heat transfer during melting andsolidification processes with enhanced PCM in low-medium TES applications, the thermophysicalcharacterization of PCMs, the numerical and experimental investigations, the derivationof numerical dimensionless heat transfer correlations and guidelines on the design of compactTES. The creation of cost-effective new conceptual design of high-performance TES will promotethe wider utilisation of renewable energy resources for heating systems and hot water indomestic and commercial buildings.