Thermoacoustic heat pump utilizing medium/low-grade heat sources for domestic building heating  

作　　者：Yiwei Hu Kaiqi Luo Dan Zhao Zhanghua Wu Yupeng Yang Ercang Luo Jingyuan Xu 

机构地区：[1]Chinese Academy of Science,Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Beijing 100190,China [2]University of Chinese Academy Science,Beijing 100049,China [3]Building Energy Research Center,Tsinghua University,Beijing 100084,China [4]Department of Mechanical Engineering,Faculty of Engineering,University of Canterbury,Private Bag 4800,Christchurch 8041,New Zealand [5]Institute of Microstructure Technology,Karlsruhe Institute of Technology,Karlsruhe 76344,Germany

出　　处：《Energy and Built Environment》2024年第4期628-639,共12页能源与人工环境（英文）

基　　金：financially supported by the National Natural Sci-ence Foundation of China (Grant No.51876213 and No.51976230);Strategic Priority Research Programme,CAS (No.XDA21080300);the Open Project of CAS Laboratory of Cryogenics,No.CRYO202214;supported by University of Canterbury with the award No.452DISDZ.

摘　　要：Thermoacoustic heat pumps are a promising heating technology that utilizes medium/low-grade heat to reduce reliance on electricity.This study proposes a single direct-coupled configuration for a thermoacoustic heat pump,aimed at minimizing system complexity and making it suitable for domestic applications.Numerical investiga-tions were conducted under typical household heating conditions,including performance analysis,exergy loss evaluation,and axial distribution of key parameters.Results show that the proposed thermoacoustic heat pump achieves a heating capacity of 5.7 kW and a coefficient of performance of 1.4,with a heating temperature of 300℃and a heat-sink temperature of 55℃.A comparison with existing absorption heat pumps reveals favor-able adaptability for large temperature lift applications.A case study conducted in Finland over an annual cycle analyzes the economic and environmental performance of the system,identifying two distinct modes based on the driving heat source:medium temperature(≥250℃)and low temperature(<250℃),both of which exhibit favorable heating performance.When the thermoacoustic heat pump is driven by waste heat,energy savings of 20.1 MWh/year,emission reductions of 4143 kgCO_(2)/year,and total environmental cost savings of 1629€/year are obtained.These results demonstrate the potential of the proposed thermoacoustic heat pump as a cost-effective and environmentally friendly option for domestic building heating using medium/low-grade heat sources.

关 键 词：Thermoacoustic heat pump THERMODYNAMICS Heat pump Medium/low-grade heat Domestic heating 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]