电费涨涨涨？东大团队研究发现空调外机全封闭遮挡显著增加能耗

Core Viewpoint - The research highlights the negative impact of air conditioning outdoor unit covers on building energy consumption and performance, proposing optimized structural designs to balance aesthetics and energy efficiency, providing scientific basis for urban building facade design and energy-saving policies [1][5]. Group 1: Research Background - The study addresses the increasing issues of urban heat island effect and cooling energy consumption due to rapid urbanization, emphasizing the need for green and resilient city development as outlined in the upcoming Central Urban Work Conference in 2025 [2]. - The research team conducted surveys on air conditioning unit installations in over 80 cities, including international locations such as New York, London, and Tokyo, revealing a common trend of aesthetically pleasing building facades that obscure outdoor units, leading to increased energy consumption and extended cooling times [2]. Group 2: Research Findings - The research utilized laboratory testing, thermodynamic modeling, and full-scale building energy consumption simulations to assess the impact of different structural parameters (louver angles, perforation rates) of outdoor unit covers on cooling/heating performance and energy consumption [4]. - Findings indicate that fully enclosed outdoor unit covers can increase building cooling energy consumption by an average of 11.4 kWh/m, with extreme cases reaching up to 26.6 kWh/m, significantly extending cooling operation times and exacerbating discomfort and grid pressure during high-temperature conditions [4]. Group 3: Recommendations - The study recommends prioritizing the use of optimized parameters for outdoor unit covers, such as louver angles of 60° or 80° and perforation rates of 30% or 40%, to minimize energy efficiency losses while maintaining visual integrity of building facades [5]. - This research provides actionable design guidelines for urban managers, architects, and policymakers, supporting the dual goals of enhancing urban aesthetics and ensuring building energy efficiency and grid stability, thus aiding Asian megacities in achieving low-carbon sustainable development [5].