温度补偿墙体的初步研究

A Preliminary Study on Temperature Compensated Wall

我国建筑普遍存在能耗大、效率低、围护结构的保温隔热性能差等问题,而围护结构能耗是建筑能耗中占比最大的部分。建筑围护结构是室内环境与室外环境的联系纽带,是建筑物内、外环境进行热量交换的主要通道,所以减少墙体能耗是减少建筑能耗的主要方法之一。但是传统墙体传热系数固定不变,不利于昼夜温差大的严寒地区及时利用空气的温度进行散热和得热。本文提出了温度补偿墙体墙体,在建筑内、外环境传热驱动温差发生变化时,墙体可以及时的增加"有益"传热,减少"有害"传热,以达到有效的降低建筑物能耗的目的,并应用CFD软件包Fluent通过对温度补偿墙体系统进行了简化,研究了温度补偿墙体在不同双金属片曲率,不同变热阻层厚度及不同双金属片间距时热工特性,为后续的实验研究奠定了基础。

Large energy consumption, low efficiency and the poor insulation structure and the huge envelope energy consumption are the most important existing issues. Building envelope is the link between the indoor environment and the outdoor environment, is the main channel of heat exchange between building inside and outside, therefore reduce the wall energy consumption is one of the main methods to reduce building energy consumption. But heat transfer coefficient of traditional wall is fixed, is not suitable for the cold area where the temperature difference between day and night is large. In this paper, the temperature compensation wall is proposed. When the temperature difference between the inside and outside of the building is changed, the wall can increase the ＂beneficial＂ heat transfer and reduce the ＂harmful＂ heat transfer in order to achieve the effective reduction of the building. The Computational Fluid Dynamics CFD software package Fluent is adopt for simulation of thermal performance of the temperature compensation wall. The influence of different thermal resistance thickness and different bimetallic spacing are simulated.