The reporter learned from the Institute of Physics and Chemistry Technology of the Chinese Academy of Sciences on the 6th that researchers from the institute proposed a process design plan for a new type of high-efficiency thermoacoustic refrigeration system.The energy efficiency ratio of the heat-driven thermoacoustic refrigeration system developed using this solution far exceeds that of similar systems and is comparable to some double-effect absorption refrigeration systems.Relevant research results were published online in Cell Reports Physical Science and Applied Physics Letters.
The thermally driven thermoacoustic refrigerator is an emerging refrigeration technology that works based on the thermal interaction (thermoacoustic effect) between the alternating flow of gas working fluid and adjacent solid walls. Thermoacoustic refrigeration technology generally uses inert gas working fluids and is considered a new generation refrigeration technology with great application prospects.
This time, the research team revealed for the first time the mutual coupling and optimal matching working mechanism of the sound field, temperature field and energy flow field in the high-efficiency heat-driven thermoacoustic refrigeration system, and based on this, proposed a new heat-driven thermoacoustic refrigeration workflow, thus greatly improving the overall thermal cooling efficiency of the system.
"When helium was used as the working fluid in the experiment, when the heat source temperature was 450 degrees Celsius, under standard air conditioning refrigeration conditions with an ambient temperature of 35 degrees Celsius and a cooling temperature of 7 degrees Celsius, the performance coefficient of the thermally driven thermoacoustic refrigeration system reached 1.12 and the cooling power was 2.53 kilowatts." said Luo Ercang, the corresponding author of the paper and a researcher at the Institute of Physics and Chemistry Technology of the Chinese Academy of Sciences.Under similar working conditions, this performance coefficient is 2.7 times the highest level of the same type of prototype previously reported, and exceeds the level of existing adsorption and single-effect absorption refrigeration technologies.Comparable to some double-effect absorption refrigeration systems.