How to achieve energy efficiency in buildings without compromising indoor air quality:A case study on enthalpy exchangers

作     者：LI Hao ZHANG Tao LIU XiaoHua 

作者机构：Department of Building ScienceTsinghua UniversityBeijing 100084China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2024年第67卷第9期

页      面：2648-2658页

核心收录：

学科分类：081302[工学-建筑设计及其理论] 08[工学] 081404[工学-供热、供燃气、通风及空调工程] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2023YFC3807001 and 2023YFC3807101) the National Natural Science Foundation of China(Grant Nos.52394223 and 52278114) Tsinghua University-Architectural Design and Research Institute Joint Research Center for Synergy and Wisdom Creation of Architecture 

主　　题：building energy efficiency enthalpy recovery heat recovery effectiveness cross-contamination 

摘      要：As a representative heat recovery device,the fixed-plate enthalpy exchanger possesses the advantages of high recovery effectiveness,low pressure drop,and small space ***,indoor contaminants may transfer to fresh air through the enthalpy exchanger simultaneously,causing cross-contamination ***,the cross-contamination risk of the fixed-plate enthalpy exchanger has been under-researched in previous *** a result,this study experimentally investigates the energy performance,formaldehyde and ammonia transfer rates of paper-based and membrane-based enthalpy *** results illustrate that the enthalpy recovery effectiveness of the plate exchangers ranges from 60%–85%.The formaldehyde transfer rate through the exchangers varies from 5%–23%,and the ammonia transfer rate is 0–15%.The high effectiveness and low contaminant transfer rates are conducive to the promising application of the fixed-plate enthalpy *** addition,the energy reclaimed increases with the increase of the absolute indoor-outdoor enthalpy *** formaldehyde and ammonia transfer rates and cross-contamination risk slightly decrease with increasing temperature but significantly increase with increasing ***,the experimental results demonstrate that the contaminant transfer rates through the membranebased exchanger are lower than those of the paper-based *** study provides a reference for the fixed-plate enthalpy exchanger design in practical applications.