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Energy use of advanced ventilation systems in a cold climate single-family house
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-17 , DOI: 10.1016/j.enbuild.2025.115329
Ian Garman, Jonn Are Myhren, Magnus Mattsson

Warming up incoming fresh air can account for half the space heating demand of a well insulated residential building. Variable air supply (e.g. by demand control) and energy recovery with an air-to-air heat exchanger reduce that demand. However in real-world settings, expected cost and environmental impact savings may not arise, leading to a so-called performance gap. This long-term study followed the building occupancy and electricity consumption of a modern family home in central Sweden, heated using a ground-source heat pump. Over three winters, three mechanical ventilation systems were trialled. Two had heat recovery – flat-plate or rotating wheel – while one was an exhaust system equipped with sensors for demand control of individual rooms. Variable airflow by simple schedule was also evaluated. In consistently subzero temperature conditions, the rotating wheel offered energy savings of at least 11 % compared to the flat-plate device. There was however no evidence (within a warmer temperature range) of a clear difference in heat demand between the exhaust system trials and those with heat recovery. The timing of electrical demand periods suggested that this apparent heat recovery performance gap related to temperature regulation and frost protection within the air handling units. In this real-world setting, with a ground-source heat pump providing baseload warmth, heat recovery ventilation provided limited electrical energy savings, and appeared to align the timing of power demand peaks more closely with falling outdoor air temperature.

中文翻译:


在寒冷气候的独栋住宅中使用先进的通风系统的能源



加热进入的新鲜空气可以占隔热良好的住宅楼空间供暖需求的一半。可变空气供应(例如通过需求控制)和空气-空气热交换器的能量回收减少了这种需求。然而,在现实世界中,可能不会产生预期的成本和环境影响节省,从而导致所谓的性能差距。这项长期研究跟踪了瑞典中部一栋现代家庭住宅的建筑占用率和用电量,该住宅使用地源热泵供暖。在三个冬天里,试验了三种机械通风系统。其中两个具有热回收功能 - 平板或旋转轮 - 而一个是配备传感器的排气系统,用于对各个房间进行需求控制。还评估了通过简单时间表的可变气流。在持续低于零度的温度条件下,与平板设备相比,旋转轮至少可节省 11% 的能源。然而,没有证据表明(在较暖的温度范围内)排气系统试验和热回收试验之间的热量需求存在明显差异。电力需求期的时间表明,这种明显的热回收性能差距与空气处理装置内的温度调节和防冻有关。在这个现实世界的环境中,由于地源热泵提供基本负载热量,热回收通风提供了有限的电能节省,并且似乎使电力需求峰值的时间与室外气温的下降更紧密地保持一致。
更新日期:2025-01-17
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