Advancements in energy-efficient building technologies: An enhanced lee model for precision simulation and optimization of heat pipe applications

Abstract

The rising demand for energy, coupled with growing environmental concerns, has intensified the focus on building energy consumption. Heat pipe technology, particularly gravity heat pipes, is recognized as a promising solution for building cooling and energy conservation due to its high efficiency, simple design, and strong adaptability. To comprehensively investigate the intricate heat transfer process in gravity heat pipes, an effective integration of heat pipes with building systems is realized. This study focuses on strategies to enhance the Lee model with the primary objective of improving simulation accuracy and overall performance through systematic refinement and innovative modifications. This study seeks to offer valuable insights to enhance the validity and applicability of the Lee model across diverse scenarios, enabling a cost-effective and accurate visualization of the application of heat pipe technology in building cooling system processes. The improved Lee model demonstrates heightened self-regulation capabilities in terms of thermal and mass balance, outperforming traditional models in prediction accuracy. Numerical simulations extend the investigation to explore the impact of various factors on the flow dynamics of gravity heat pipes, encompassing liquid filling rate, wall hydrophilicity, heating power, and inner diameter of heat pipes. The research aims to provide crucial insights into the design and application of gravity heat pipes in buildings, particularly in understanding the fundamental influence of these factors on heat transfer performance and gas-liquid phase transition processes. The overarching message underscores the significance of promoting energy-saving technologies, such as gravity heat pipes, for sustainable building practices.