能源总线系统的(火用)分析与碳分析

摘要

Develops a general exergy and carbon dioxide emission analysis model for the natural water energy bus system (EBS), cooling tower EBS and single building cooling system. Taking a commercial building in Shanghai as an example, dynamically analyses hourly exergy and carbon dioxide emission of the three systems by means of TRNSYS software. The result shows that the descending order according to the exergy loss per unit refrigeration output is the single building cooling system, cooling tower EBS and natural water EBS with the respective value of 0. 304, 0. 266 and 0. 185. In accordance with carbon dioxide emission per unit refrigeration output, the single building cooling system is the largest, the cooling tower EBS the second and the natural water EBS the smallest, with the value being 0.254, 0.215 and 0.189 kg/ (kW ? h) respectively. Compared with single building cooling system, the two EBSs have obvious superiority in exergy efficiency and carbon dioxide emission.%建立了天然水源能源总线系统、冷却塔能源总线系统以及单体建筑供冷系统的(火用)分析与碳分析通用模型,并以上海某商业中心为例,基于TRNSYS软件,对系统进行了动态逐时(火用)分析与碳分析.结果表明,按单位冷量的(火用)损失排序,由高到低依次为单体建筑供冷、冷却塔能源总线系统、天然水源能源总线系统,其值依次为0.304,0.266,0.185；按单位冷量的碳排放量排序,单体建筑供冷系统碳排放量最大,其次为冷却塔能源总线系统,最小的是天然水源能源总线系统形式,其值依次为0.254,0.215,0.189 kg/(kW·h).同单体建筑供冷相比,能源总线系统在(火用)效率与碳排放量方面均具有明显的优势.