Numerical analysis of the methods for reducing the energy use of air-conditioning systems in non-uniform indoor environments
Numerical analysis of the methods for reducing the energy use of air-conditioning systems in non-uniform indoor environments
复制标题
非均匀室内环境下空调系统能耗降低方法的数值分析
DOI：
10.1016/j.buildenv.2019.106442
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发表时间：
2020
影响因子：
7.4
通讯作者：
Baoming Li
中科院分区：
文献类型：
--
作者：
Chao Liang;Xianting Li;Xiaoliang Shao;Baoming Li
先前的研究表明，在不均匀的室内环境中使用有效的气流分布可以显着降低空间的冷却负荷。但新风比较小时，空调系统冷负荷（SCL）仅略有下降，导致空调系统能耗（SEU）下降有限。为了充分发挥高效气流分布的节能潜力，降低SEU，对不同气流分布的大空间建筑中的SCL进行了模拟，并对采用单一冷源和多个低等级冷源处理空气的SEU进行了比较。结果表明：（1）有效的气流分布实际上提供了使用多个低等级冷却源来处理空气的潜力；反之，采用单一冷源则会放弃潜力，节能效果甚微； (2)采用多个低档冷源冷却送风、回风、新风可发挥潜力，置换通风数值情况下节能率为13.9%~27.5%； (3)虽然新风比较小时，低效气流分布的SCL增加很小，但冷源等级显着提高，因此在短路通风的数值情况下需要多22.9%的能量。本研究将有益于非均匀室内环境下具有更高节能能力的空调系统的设计。
Previous studies have shown that using efficient airflow distributions for a non-uniform indoor environment can reduce the space cooling load significantly. However, the system cooling load (SCL) of air-conditioning is decreased only a little when the fresh-air ratio is small, causing the limited decrease in the air-conditioning system energy use (SEU). To fully exploit the energy-saving potentials of efficient airflow distributions to reduce the SEU, the SCL in a large-space building with different airflow distributions was simulated, and the SEU was compared between using a single cooling source and the multiple low-grade cooling sources to handle the air. The results show that (1) efficient airflow distributions actually provide the potentials of using the multiple low-grade cooling sources to handle the air; in contrast, using a single cooling source will abandon the potentials and result in little energy saving; (2) using multiple low-grade cooling sources for cooling the supply air, return air, and fresh air can make the potentials available, and the energy-saving rate could be 13.9%–27.5% in the numerical cases with a displacement ventilation; (3) although the increase in the SCL for inefficient airflow distributions is little when the fresh-air ratio is small, the grade of cooling source is increased significantly so that 22.9% more energy is needed in the numerical case with a short-circuit ventilation. This study will be beneficial for the design of air-conditioning systems in non-uniform indoor environments with higher energy-saving capacity.
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DOI：
--
发表时间：
2009
期刊：
--
影响因子：
--
作者：
黄晨;蔡宁;高雪垒
通讯作者：
黄晨;蔡宁;高雪垒
影响因子：
10.4
作者：
V. Dorer;A. Weber
通讯作者：
V. Dorer;A. Weber
建筑物漫射天花板通风：基础理论和研究方法回顾
影响因子：
11.1
作者：
Wu Wentao;Yoon Nari;Tong Zheming;Chen Yujiao;Lv Yang;Aerenlund Torbjorn;Benner Jingru
通讯作者：
Benner Jingru
影响因子：
10.4
作者：
K. Chua;S. Chou
通讯作者：
K. Chua;S. Chou
影响因子：
15.9
作者：
N. Soares;Joana Bastos;L. D. Pereira;Ana Soares;A. Amaral;E. Asadi;Eugénio Rodrigues;F. B. Lamas;H. Monteiro;Marta B. Lopes;A. Gaspar
通讯作者：
N. Soares;Joana Bastos;L. D. Pereira;Ana Soares;A. Amaral;E. Asadi;Eugénio Rodrigues;F. B. Lamas;H. Monteiro;Marta B. Lopes;A. Gaspar