Publicado 6 números por año
ISSN Imprimir: 1940-2503
ISSN En Línea: 1940-2554
Indexed in
NUMERICAL ANALYSIS OF A THERMALLY DRIVEN THERMOACOUSTIC HEAT PUMP FOR LOW-GRADE HEAT RECOVERY
SINOPSIS
This paper presents the numerical analysis of a thermally driven thermoacoustic heat pump, which aims to utilize industrial waste heat to provide air conditioning for buildings where waste heat is abundant but air conditioning is required. The working gas is helium at 3.0 MPa. The operating frequency is around 100 Hz. A three-stage traveling wave thermoacoustic engine is designed to convert waste heat to acoustic power, and a single-stage traveling wave thermoacoustic cooler is connected to the engine to provide cooling at a temperature of 0° C for air conditioning. The ambient temperature is set as 40° C. A system with symmetric geometric configuration was initially modeled and validated by published experimental data. The asymmetric impedance distribution was observed, and then an asymmetric system which has different geometric dimensions at each stage was modeled to improve the acoustic conditions within the system. The simulation results show that the overall energy efficiency (defined as the ratio of the cooling power divided by the total heat input) of the tested system for the given temperature range can reach 15−17%, which shows the feasibility and potential for developing thermally driven thermoacoustic heat pump systems for utilizing waste heat to produce air conditioning.
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Al-Kayiem Ali, Yu Zhibin, Numerical investigation of a looped-tube travelling-wave thermoacoustic engine with a bypass pipe, Energy, 112, 2016. Crossref
-
Jin T., Yang R., Wang Y., Feng Y., Tang K., Acoustic field characteristics and performance analysis of a looped travelling-wave thermoacoustic refrigerator, Energy Conversion and Management, 123, 2016. Crossref
-
Tang Ke, Feng Ye, Jin Tao, Jin Shenghan, Li Ming, Yang Rui, Effect of Gedeon streaming on thermal efficiency of a travelling-wave thermoacoustic engine, Applied Thermal Engineering, 115, 2017. Crossref
-
Luo K, Sun D M, Zhang J, Shen Q, Zhang N, A multi-stage traveling-wave thermoacoustically-driven refrigeration system operating at liquefied natural gas temperature, IOP Conference Series: Materials Science and Engineering, 278, 2017. Crossref