The researchers developed a heat-driven thermo-acoustic heat pump that can supposedly reach a temperature lift of 125 ° C. It uses a thermo-acoustic heat pump to stable the heat of the motor unit. The system also includes a thermo -acoustic motor unit and acoustic resonators.
A research team led by scientists from the Chinese Academy of Sciences (CAS) has developed a new heat-driven thermoacoestic heat pump (HDTAHP) that is said to be able to reach higher temperature lift and heat feed measurements than that is achieved by advanced absorption heating heating heating heating heating heating heating heating heating heating roofing earntarative heating gut-up heating up windowswarms.
“This work offers a promising solution for industrial heat supply at high temperature,” the group said. “Criticism, the HDTAHP of one FAS works without moving parts, making it very suitable for high temperature operation. Future efforts will focus on optimizing the system design to enable integration with actual heat sources and pouring stones, to further improve the performance on-heart for heating and to further extend the practical application proofs.”
The academics first designed the system in the Sage software, which is often used for the development of thermo -acoustic systems. The system was set to record three sub -units: a thermo -acoustic motor unit, a thermo -acoustic heat pump unit and acoustic resonators. In the motor unit, a heat exchanger at the low temperature uses two thermosyphons to release heat through water. Throughout the system oscillates helium gas to transfer energy as a sound.
With the help of sage, they further optimized the system, with dimensions of the regenerator at the motor unit as a diameter of 110 mm, a length of 45 mm and a wall thickness of 5 mm, while the regenerator had dimensions of 110 mm and 5 mm, respectively, respectively. The compliance tubs at the acoustic resonator had a diameter of 120 mm, a length of 270 mm and a wall thickness of 4 mm; While the resonance tube was 44 mm, 9,000 mm and 4 mm respectively.
“With a hot final temperature of the 350 ° C engine unit and an average pressure of 5 MPA, the system achieves a supply temperature of 270 ° C with a temperature lift of 125 ° C, which was highest reported under all heat-driven heat pumps,” the scientists explained. “In the meantime, a performance member for heating (COPH) of 0.41 and a relative carnot -efficiency (COPR) of 33% is reached, corresponding to a heat supply of 1,903 W.”
The research group also showed that, due to the use of thermosyphons at the cold end of the motor unit, the released heat is steadily grows from 3,566 W to 4.202 W. That is, with an increase in the average pressure, while the cold final temperature remained stabil around 50 C. In that condition the starting temperature of the Pucking temperature of the Pucking temperature, while COP, kept the Pucking temperature, while COP. 0.36 reached.
“An increase in the temperature lift of the heat pump unit reduces the heat pump capacity, which leads to reductions in both heat feed and Coph. However, the absorbed heat increases to maintain the cold final temperature,” they concluded. “A larger temperature difference of the engine unit improves thermo-acoustic conversion, which increases the heat supply and cooph. Moreover, the average pressure increases the heat-saving capacity of the work fluid, which leads to an increase in heat feeding and an initial rise (higher mpa. Increase in the engine unit due to the engine unit. “
The system was presented in “A heat-driven thermo-acoustic heat pump that supplies heat to 270 ° C“Published in Energy. Researchers from the Chinese Chinese Academy of Sciences, the University of Chinese Academy of Sciences and the Aero Engine Corporation of China (AECC) Commercial Aircraft Engine Company participated in the research.
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