Analysis of performance degradation mechanism of fresh air heat recovery system in ultra-low energy buildings under the dual carbon target
双碳目标下超低能耗建筑新风热回收系统性能衰减机理分析

摘要

在“双碳”目标推动下，超低能耗建筑成为实现节能减排的重要路径。新风热回收系统作为其关键组成部分，其性能稳定性直接影响整体能效。然而，实际运行中系统存在性能衰减现象，制约了节能效果的持续发挥。本文围绕新风热回收系统的性能衰减机理展开研究，重点分析材料老化、积尘堵塞、温湿度波动及控制策略失配等因素对系统换热效率的影响机制。通过理论分析与模拟验证相结合的方法，提出性能衰减的关键影响路径，并为系统优化设计与运维管理提供技术支撑。

Abstract

Driven by the "Dual Carbon" target, ultra-low energy buildings have become an important pathway to achieve energy conservation and emission reduction. As a key component of such buildings, the performance stability of the fresh air heat recovery system directly affects the overall energy efficiency. However, the performance degradation phenomenon in actual operation restricts the continuous realization of energy-saving effects. This paper focuses on the research of the performance degradation mechanism of the fresh air heat recovery system, and emphatically analyzes the influence mechanisms of material aging, dust accumulation and blockage, temperature and humidity fluctuations, and control strategy mismatch on the heat transfer efficiency of the system. Through the combination of theoretical analysis and simulation verification, the key influence paths of performance degradation are proposed, providing technical support for the optimal design and operation and maintenance management of the system.