液体循环式热回收系统的模型建立及节能分析

doi:10.6040/j.issn.1672-3961.0.2024.068

摘要/Abstract

摘要： 为降低新风负荷,基于平直翅片圆管式换热器,构建了2种液体循环式热回收系统的数学模型。根据青岛全年8 760 h的室外气象参数,将该模型按温度、湿度划分为多个处理区域,并逐时计算各系统的节能效果。研究结果表明,在低湿工况下,三盘管与两盘管热回收系统的性能相近;在高湿工况下,三盘管系统具有显著优势,其回收能量是两盘管系统的3.86倍;相较于无热回收系统,两盘管系统年节能率约为25.78%,而三盘管系统年节能率则高达约42.02%;三盘管热回收系统不仅能预冷或预热新风,还能满足夏季除湿后的再热需求,因此全年热回收效果更稳定,节能效果显著。本研究为组合式空调箱热回收系统改造提供理论依据,对绿色建筑与可持续发展具有重要意义。

关键词: 液体循环式热回收, 翅片管换热器, 室外气象参数, 节能, 组合式空调箱

Abstract: To reduce the fresh air load, mathematical models of two liquid recirculating heat recovery systems were constructed based on flat finned circular tube heat exchangers. The model was divided into multiple treatment areas according to temperature and humidity based on outdoor meteorological parameters for 8 760 h in a year. The energy-saving effect of each system was calculated hour by hour. The results showed that under low humidity conditions, the performance of the three-coil and two-coil heat recovery systems was similar; under high humidity conditions, the three-coil system had a significant advantage, and its recovered energy was about 3.86 times of a two-coil system. Compared with the no heat recovery system, the annual energy-saving rate of the two-coil system was about 25.78%, while the three-coil system was as high as about 42.02%. The three-coil heat recovery system not only pre-cooled or pre-heated the outdoor air, but also met the reheating demand after dehumidification in summer, so the heat recovery effect was more stable throughout the year and the energy-saving performance was excellent. This study provided a theoretical basis for the modification of the heat recovery system of the air handling unit, which was of great significance for green building and sustainable development.

Key words: liquid circulation heat recovery, finned tube heat exchangers, outdoor meteorological parameter, energy-saving, air handling unit

中图分类号:

TU83

鲁家彤,张超旭,董晓菲,赵红霞,柏超. 液体循环式热回收系统的模型建立及节能分析[J]. 山东大学学报 (工学版), 2025, 55(4): 149-159.

LU Jiatong, ZHANG Chaoxu, DONG Xiaofei, ZHAO Hongxia, BAI Chao. Model establishment and energy-saving analysis of liquid circulation heat recovery systems[J]. Journal of Shandong University(Engineering Science), 2025, 55(4): 149-159.

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