Computer simulation to achieve low carbon buildings

本文介绍了整体式低碳建筑设计的方法，同时概述了计算机模拟技术和建筑物理工程师在实现建筑低碳节能设计中的重要作用。文章结合当前瑞士节能建筑实例，进一步阐述计算机模拟技术如何帮助建筑师优化设计方案以实现低碳节能，同时创造出舒适健康的人居环境。计算机模拟技术可以准确预测建筑设计方案的性能或量化不同设计方案的性能以提供最合理方案，其主要功能包括预测室内空气温度，表面积辐射温度，计算室内得热量，制冷采暖负荷，机械通风和自然通风情况，以及室内外气流分布状况

Standard Young Tableaux and Colored Motzkin Paths

In this paper, we propose a notion of colored Motzkin paths and establish a bijection between the $n$-cell standard Young tableaux (SYT) of bounded height and the colored Motzkin paths of length $n$. This result not only gives a lattice path interpretation of the standard Young tableaux but also reveals an unexpected intrinsic relation between the set of SYTs with at most $2d+1$ rows and the set of SYTs with at most 2d rows.Comment: 21 page

Towards zero carbon design in offices: Integrating smart facades, ventilation, and surface heating and cooling

This paper discusses an overall strategy for reducing energy demand in non-domestic buildings, mainly focusing on office developments. It considers four areas: reducing internal heat loads; addressing passive design through the building construction; using efficient and responsive HVAC systems and focusing on chilled (heated) surface systems; integrating renewable energy supply systems into the building design. The impact on energy use and carbon dioxide emissions will be discussed. The paper will draw from a range of design projects carried out in Europe, where this integrated approach has been applied, and then explore the benefits in relation to applications in the Middle East and China. Energy modelling results, to inform the design process will be presented, using energy simulation for three case study locations, in Zurich, the Chongqing and Abu Dhabi

Skycourt as a ventilated buffer zone in office buildings: assessing energy performance and thermal comfort

Skycourts, recently, have been considered as beneficial spaces in commercial buildings, in particular offices. Skycourts are perceived as spaces that act as transitional and recreational nodes. Research considering the performance in response to conditions in these regions is steadily growing. However, there is a lack of conclusive results in the available literature about the actual energy performance of these spaces. The primary purpose of this paper is to examine the potential of the skycourt to perform as a buffer zone that suits to the ventilation strategy in office buildings in a temperate climate, thus could potentially reduce energy demands for heating and cooling, furthermore ensure thermal comfort in these spaces. Using a hypothetical reference office building in London, coupled Building Energy Simulation (BES) and Computational Fluid Dynamics (CFD) are carried out for two ventilation modes; mode one, the base model represents skycourt with isolated mechanical ventilation and mode two, alternative models that incorporate combined ventilation strategies with the adjacent offices’ zones of the skycourt. These are simulated and evaluated regarding energy consumption and thermal comfort. Overall, the simulation results highlight that the incorporation of skycourt as buffer zone can potentially have a significant impact on the annual energy consumption

Reducing energy demand in non-domestic buildings: integrating smart facades, ventilation, and surface heating and cooling

This paper discusses an overall strategy for reducing energy demand in non-domestic buildings, mainly focussing on office developments. It considers four areas: reducing internal heat loads; addressing passive design through the building construction; using efficient and responsive HVAC systems and focussing on chilled (heated) surface systems; integrating renewable energy supply systems into the building design. The impact on comfort, energy use and carbon dioxide emissions will be discussed. The paper will draw from a range of design projects carried out in Europe, where this integrated approach has been applied, and then explore the benefits in relation to applications in the Middle East and China. Energy modelling results, to inform the design process will be presented, using energy simulation for three case study locations, in Zurich, the Shanghai and Abu Dhabi