Thermoelectric cooling(TEC)is a solid-state technology that utilizes electricity to pump heat from one side of a material or device to the other.It leverages the dual role of charge carriers,which transport charge and...Thermoelectric cooling(TEC)is a solid-state technology that utilizes electricity to pump heat from one side of a material or device to the other.It leverages the dual role of charge carriers,which transport charge and heat,enabling heat redistribution under external electric and/or magnetic fields.This technology offers advantages including miniaturization,solid-state operation,vibration-free performance,and long-term reliability,making it particularly beneficial in applications where conventional compressor-based cooling is less suitable.Currently,TEC has been mainly employed in near-room-temperature scenarios,including but not limited to refrigerators,precise temperature control in optical modules,and polymerase chain reaction detectors.In recent years,there has been a growing demand for solid-state cooling technologies capable of operating at lower temperatures.For instance,cooling infrared detectors to temperatures below 150 K is crucial to minimize noise and improve sensitivity[1].This brings new challenges for TEC to achieve enhanced cooling capabilities—operating at lower temperature ranges while delivering superior performance.展开更多
During recent years,atmospheric water generation(AWG)has garnered significant attention among researchers as a viable solution to the water-scarcity problem.Generally,AWG requires dehumidification,which includes two m...During recent years,atmospheric water generation(AWG)has garnered significant attention among researchers as a viable solution to the water-scarcity problem.Generally,AWG requires dehumidification,which includes two main principles of refrigeration and sorption.Among refrigeration methods,thermoelectric coolers are suitable and,among sorption methods,it is best to utilize desiccant materials with high sorption capacity and low heat generation.In the present study,a portable hybrid/integrated solar AWG system was designed and tested under realistic conditions of Babol,Iran(36.5387°N,52.6765°E)over four typical summer days between 14 and 31 August 2021.Two models(Models A and B)were designed and evaluated.Temperature,relative humidity,solar irradiance and water-production data were recorded to assess the system performance(i.e.the ratio between the generated water and consumed power in ml/W.hour)and economically analyse the system.Based on the results acquired,the maximum water production in the proposed configuration(acquired from Model B)was 2.12 l/m^(2).day at an average relative humidity and a temperature of 52%and 36°C,respectively.The desired AWG system had a system performance of 0.19 ml/W.hour,annual water production of 774.4 l/m^(2),production cost of 0.0246$/l/m^(2)and a payback period of 1.19 years.展开更多
基金supported by the National Key Research and Development Program of China(2024YFA1409200)the National Natural Science Foundation of China(52471239)the Fundamental Research Funds for the Central Universities(226-2024-00075)。
文摘Thermoelectric cooling(TEC)is a solid-state technology that utilizes electricity to pump heat from one side of a material or device to the other.It leverages the dual role of charge carriers,which transport charge and heat,enabling heat redistribution under external electric and/or magnetic fields.This technology offers advantages including miniaturization,solid-state operation,vibration-free performance,and long-term reliability,making it particularly beneficial in applications where conventional compressor-based cooling is less suitable.Currently,TEC has been mainly employed in near-room-temperature scenarios,including but not limited to refrigerators,precise temperature control in optical modules,and polymerase chain reaction detectors.In recent years,there has been a growing demand for solid-state cooling technologies capable of operating at lower temperatures.For instance,cooling infrared detectors to temperatures below 150 K is crucial to minimize noise and improve sensitivity[1].This brings new challenges for TEC to achieve enhanced cooling capabilities—operating at lower temperature ranges while delivering superior performance.
文摘During recent years,atmospheric water generation(AWG)has garnered significant attention among researchers as a viable solution to the water-scarcity problem.Generally,AWG requires dehumidification,which includes two main principles of refrigeration and sorption.Among refrigeration methods,thermoelectric coolers are suitable and,among sorption methods,it is best to utilize desiccant materials with high sorption capacity and low heat generation.In the present study,a portable hybrid/integrated solar AWG system was designed and tested under realistic conditions of Babol,Iran(36.5387°N,52.6765°E)over four typical summer days between 14 and 31 August 2021.Two models(Models A and B)were designed and evaluated.Temperature,relative humidity,solar irradiance and water-production data were recorded to assess the system performance(i.e.the ratio between the generated water and consumed power in ml/W.hour)and economically analyse the system.Based on the results acquired,the maximum water production in the proposed configuration(acquired from Model B)was 2.12 l/m^(2).day at an average relative humidity and a temperature of 52%and 36°C,respectively.The desired AWG system had a system performance of 0.19 ml/W.hour,annual water production of 774.4 l/m^(2),production cost of 0.0246$/l/m^(2)and a payback period of 1.19 years.
