1.The crucial role of heating decarbonization in achieving carbon neutrality in China by 2060,The decarbonization of heating,in both buildings and industries,presents a major challenge and opportunity for China if the...1.The crucial role of heating decarbonization in achieving carbon neutrality in China by 2060,The decarbonization of heating,in both buildings and industries,presents a major challenge and opportunity for China if the nation is going to meet its 2060 commitment to carbon neutrality.Currently,as shown in Fig.1(a)[1],the buildings and industrial sectors share the largest proportion(more than 70%)of end-use energy demand in China.In the buildings sector,heating accounts for half of the energy demand[2];in the industrial sector,50%-70%of the energy demand is for process heating[3].As summarized in Fig.1(b)[3],heating demand in the buildings sector usually requires temperatures below 80℃;in different areas of the industrial sector—including but not limited to distillation,drying,and dyeing—the heating demand ranges across various temperatures that are mainly lower than 170℃.On average,more than 40%of industrial heat consumption falls below 150℃[4].展开更多
Atmospheric water harvesting(AWH)is a promising solution to the water shortage problem.Current sorption-based AWH(SAWH)systems seldom obtain both wide climatic adaptability and high energy efficiency due to the lack o...Atmospheric water harvesting(AWH)is a promising solution to the water shortage problem.Current sorption-based AWH(SAWH)systems seldom obtain both wide climatic adaptability and high energy efficiency due to the lack of thermodynamic optimization.To achieve the ideal harvesting circulation in SAWH systems,the“optimal harvesting window”(OHW)design based on thermodynamic analysis was first proposed and validated by our prototype.The“OHW”theory indicates the water production rate and energy efficiency could be improved by properly reducing the adsorption temperature.As the humidity increases,the optimal adsorption temperature should be closer to the dew point of the environment.Experimental results revealed that,loaded with 3 kg widely adopted silica gel,the daily water production could reach 5.76-17.64 L/d with ultrahigh energy efficiency of 0.46-1.5 L/kWh.This prototype could also achieve optimal performance in wide climatic conditions in terms of 13-35℃and 18%-72%RH.Lastly,the performance of photovoltaic(PV)-driven SAWH was evaluated.Results showed that a 1 m^(2)PV panel could generate 0.66-2 L water per day in Shanghai throughout the year,the highest in opening literature.Notably,this work introduces a promising concept that can help achieve large-scale,ultra-fast,energyefficient AWH worldwide.展开更多
基金supported by the Key Project of the National Natural Science Foundation of China(52036004).
文摘1.The crucial role of heating decarbonization in achieving carbon neutrality in China by 2060,The decarbonization of heating,in both buildings and industries,presents a major challenge and opportunity for China if the nation is going to meet its 2060 commitment to carbon neutrality.Currently,as shown in Fig.1(a)[1],the buildings and industrial sectors share the largest proportion(more than 70%)of end-use energy demand in China.In the buildings sector,heating accounts for half of the energy demand[2];in the industrial sector,50%-70%of the energy demand is for process heating[3].As summarized in Fig.1(b)[3],heating demand in the buildings sector usually requires temperatures below 80℃;in different areas of the industrial sector—including but not limited to distillation,drying,and dyeing—the heating demand ranges across various temperatures that are mainly lower than 170℃.On average,more than 40%of industrial heat consumption falls below 150℃[4].
基金supported by the National Natural Science Foundation of China(51922070).
文摘Atmospheric water harvesting(AWH)is a promising solution to the water shortage problem.Current sorption-based AWH(SAWH)systems seldom obtain both wide climatic adaptability and high energy efficiency due to the lack of thermodynamic optimization.To achieve the ideal harvesting circulation in SAWH systems,the“optimal harvesting window”(OHW)design based on thermodynamic analysis was first proposed and validated by our prototype.The“OHW”theory indicates the water production rate and energy efficiency could be improved by properly reducing the adsorption temperature.As the humidity increases,the optimal adsorption temperature should be closer to the dew point of the environment.Experimental results revealed that,loaded with 3 kg widely adopted silica gel,the daily water production could reach 5.76-17.64 L/d with ultrahigh energy efficiency of 0.46-1.5 L/kWh.This prototype could also achieve optimal performance in wide climatic conditions in terms of 13-35℃and 18%-72%RH.Lastly,the performance of photovoltaic(PV)-driven SAWH was evaluated.Results showed that a 1 m^(2)PV panel could generate 0.66-2 L water per day in Shanghai throughout the year,the highest in opening literature.Notably,this work introduces a promising concept that can help achieve large-scale,ultra-fast,energyefficient AWH worldwide.
