摘要
Extreme global climates in summer and frequent energy crises have led to an increasing demand for sustainable refrigeration;however,low-grade-thermal-energy-driven refrigeration at high ambient temperatures(≥40℃)has rarely been studied.In this paper,we report a solar-driven efficient sorption refrigeration scheme for extreme ambient temperature in summer enabled by metal-organic framework-ammonia working pairs.MIL-101(Cr)consistently achieves an ammonia sorption capacity of 0.59 g·g^(-1) contributed by the multiple sorption behavior of the host-vip interaction even when operating under condensation and sorption temperatures as high as 40℃ and 45 oC,respectively.Based on these findings,we construct a proof-of-concept device based on an MIL-101(Cr)-ammonia working pair.An impressive coefficient of performance of 0.387 is achieved when the device is subjected to high condensation temperatures(40℃),low evaporation temperatures(10℃),and desorption temperatures(100℃).These results highlight the adaptability of this working pair to high temperatures.Our research indicates that this innovative approach holds promise as a future sustainable energy technology for various practical applications,including ammonia-based fuel systems,and for addressing both cold and thermal energy demands.
基金
support from the Instrumental Analysis Centre of Shanghai Jiao Tong University
support from Key Program of National Natural Science Foundation of China(52236004)
the Non-Carbon Energy Conversion and Utilization Institute under the Shanghai Class IV Peak Disciplinary Development Program
the Fundamental Research Funds for the Central Universities.
