Abstract A combined time-series-based regression forecasting and GRA-IPSO-BP structure is proposed to forecast the electricity replacement forecasts using a time series model based on the triple exponential smoothing forecasting method. The forecast results are corrected using the GRA-IPSO-BP structure. The results of the algorithm show that using a combination of time series and GRA-IPSO-BP structure can significantly improve the forecasting accuracy of electricity replacement compared to single-method forecasting.
{"title":"Regional electrical energy substitution potential prediction based on time series and improved back propagation neural network","authors":"Ziwen Cai, Yutao Xu, Yong Xiao, Dunhui Chen, Yun Zhao, Zhukui Tan","doi":"10.1088/1742-6596/2636/1/012029","DOIUrl":"https://doi.org/10.1088/1742-6596/2636/1/012029","url":null,"abstract":"Abstract A combined time-series-based regression forecasting and GRA-IPSO-BP structure is proposed to forecast the electricity replacement forecasts using a time series model based on the triple exponential smoothing forecasting method. The forecast results are corrected using the GRA-IPSO-BP structure. The results of the algorithm show that using a combination of time series and GRA-IPSO-BP structure can significantly improve the forecasting accuracy of electricity replacement compared to single-method forecasting.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"28 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2623/1/012005
N Chairunnisa, N H Haryanti, R Nurwidayati, A Y Pratiwi, Y Arnandha, Y Saputra, N Hazizah
Abstract Fly ash waste from the Asam-Asam Power Plant in South Kalimantan continues to increase. Various attempts have been made to utilize fly ash waste, among others. as a basic material for making geopolymers. Geopolymer is environmentally friendly because it replaces all cement with high Silica (Si) and Alumina (Al) wastes such as fly ash. This study aims to characterize fly ash as a raw material of geopolymer. Fly ash was filtered using 200 mesh and then heated in an oven at 105°C for 24 hours. The prepared fly ash was then tested for physical properties and compound analysis using XRF, identification of chemical bonds and functional groups using FTIR, morphology, and elements using SEM EDX. Initial and final setting time was investigated using the Vicat apparatus to determine e whether cement is undergoing proper hydration. The results indicated that the fly ash was classified to class F. That was based on the amount of SiO 2 + Al 2 O 3 + Fe 2 O 3 of 85.91%, and the CaO content was less than 10%. Moreover, fly ash’s initial and final setting time was 1072.5 and 3180 minutes, respectively. Fly ash in this research can be used as a raw material for geopolymers.
{"title":"Characteristics of Fly Ash as a Constituent Material for Geopolymer","authors":"N Chairunnisa, N H Haryanti, R Nurwidayati, A Y Pratiwi, Y Arnandha, Y Saputra, N Hazizah","doi":"10.1088/1742-6596/2623/1/012005","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012005","url":null,"abstract":"Abstract Fly ash waste from the Asam-Asam Power Plant in South Kalimantan continues to increase. Various attempts have been made to utilize fly ash waste, among others. as a basic material for making geopolymers. Geopolymer is environmentally friendly because it replaces all cement with high Silica (Si) and Alumina (Al) wastes such as fly ash. This study aims to characterize fly ash as a raw material of geopolymer. Fly ash was filtered using 200 mesh and then heated in an oven at 105°C for 24 hours. The prepared fly ash was then tested for physical properties and compound analysis using XRF, identification of chemical bonds and functional groups using FTIR, morphology, and elements using SEM EDX. Initial and final setting time was investigated using the Vicat apparatus to determine e whether cement is undergoing proper hydration. The results indicated that the fly ash was classified to class F. That was based on the amount of SiO 2 + Al 2 O 3 + Fe 2 O 3 of 85.91%, and the CaO content was less than 10%. Moreover, fly ash’s initial and final setting time was 1072.5 and 3180 minutes, respectively. Fly ash in this research can be used as a raw material for geopolymers.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"28 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2636/1/012008
Zhiru Chen, Xi Zhao, Zhi Zhang, Zhen Jing
Abstract Based on the design theory that products can be assembled, the optimal design of the electric energy metering box in the embedded copper bar and other aspects is realized, the product wiring is standardized and concealed, the assembly method is optimized, the assembly difficulty is greatly reduced, several problems in cost and quality are solved in industrial design, and objective score data from experts are obtained through perceptual experiments. It provides a new design method and evaluation idea for the field of power measurement and has great popularization value.
{"title":"Design and engineering application of a new type of copper bar-embedded metering box based on DFA theory","authors":"Zhiru Chen, Xi Zhao, Zhi Zhang, Zhen Jing","doi":"10.1088/1742-6596/2636/1/012008","DOIUrl":"https://doi.org/10.1088/1742-6596/2636/1/012008","url":null,"abstract":"Abstract Based on the design theory that products can be assembled, the optimal design of the electric energy metering box in the embedded copper bar and other aspects is realized, the product wiring is standardized and concealed, the assembly method is optimized, the assembly difficulty is greatly reduced, several problems in cost and quality are solved in industrial design, and objective score data from experts are obtained through perceptual experiments. It provides a new design method and evaluation idea for the field of power measurement and has great popularization value.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"27 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2623/1/012002
R K Pingak, A Z Johannes, N U J Hauwali, U A Deta
Abstract This study investigates the structural parameters and the electronic properties of cubic TlGeCl x Br 3-x (x=0,1,2,3) lead-free perovskites to evaluate their potential as absorbers in perovskite solar cell devices. Density Functional Theory (DFT) embedded in the Quantum Espresso code was used to calculate these properties. The results revealed that the compounds have optimized lattice constants of 5.244 Å, 5.336 Å, 5.416 Å, and 5.501 Å, for TlGeCl 3 , TlGeCl 2 Br, TlGeClBr 2 , and TlGeBr 3 perovskites, respectively. In addition, the compounds are direct band gap (R → R) semiconductors with energy gap values of 0.847 eV, 0.683 eV, 0.556 eV, and 0.518 eV for the respective materials. It is important to note that the band gap of the perovskites reduces as a Cl − ion, two and three Cl − ions are replaced by a Br − ion, two and three Br − ions, respectively. The analysis of their projected density of states indicated that near the valence band maximum of the perovskites, Cl-3p and Br-4p states contributes the most to their total DOS. In contrast, the Ge-4p orbital is the most dominant state close to the conduction band minimum. Based on these energy gap values, the studied materials are promising candidates for lead-free perovskite solar cell devices, with TlGeBr 3 projected to be more promising than the other three materials.
{"title":"Lead-free Perovskites TlGeCl<sub>x</sub>Br<sub>3-x</sub> (x=0,1,2,3) as Promising Materials for Solar Cell Application: a DFT Study","authors":"R K Pingak, A Z Johannes, N U J Hauwali, U A Deta","doi":"10.1088/1742-6596/2623/1/012002","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012002","url":null,"abstract":"Abstract This study investigates the structural parameters and the electronic properties of cubic TlGeCl x Br 3-x (x=0,1,2,3) lead-free perovskites to evaluate their potential as absorbers in perovskite solar cell devices. Density Functional Theory (DFT) embedded in the Quantum Espresso code was used to calculate these properties. The results revealed that the compounds have optimized lattice constants of 5.244 Å, 5.336 Å, 5.416 Å, and 5.501 Å, for TlGeCl 3 , TlGeCl 2 Br, TlGeClBr 2 , and TlGeBr 3 perovskites, respectively. In addition, the compounds are direct band gap (R → R) semiconductors with energy gap values of 0.847 eV, 0.683 eV, 0.556 eV, and 0.518 eV for the respective materials. It is important to note that the band gap of the perovskites reduces as a Cl − ion, two and three Cl − ions are replaced by a Br − ion, two and three Br − ions, respectively. The analysis of their projected density of states indicated that near the valence band maximum of the perovskites, Cl-3p and Br-4p states contributes the most to their total DOS. In contrast, the Ge-4p orbital is the most dominant state close to the conduction band minimum. Based on these energy gap values, the studied materials are promising candidates for lead-free perovskite solar cell devices, with TlGeBr 3 projected to be more promising than the other three materials.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"30 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2623/1/012001
N Suprapto, H N Hidaayatullaah
Abstract This research explores university students’ perspectives on integrating sustainable development goals in physics education subjects (SDGs-PE). However, there is a few research that focuses on SDGs-PE. This research adopts a quantitative survey and is supported by a qualitative interview design. Fifty-two university students participated in the survey to fulfill the SDGs-PE instrument, and five interview participants for data collection. An exploratory factor analysis (EFA) and descriptive analysis were used to achieve the research’s goals. The research indicated that the SDGs-PE fulfills the criteria of validity and reliability. The construct validities of the SDGs-PE varied from .538 to .886 and explained 64.26% of the variance. Overall, the Cronbach’s alpha coefficient of the instrument was .812. This research has also highlighted the integration of physics education, education for sustainable development, and sustainable development goals.
{"title":"University Students’ Perspectives on Physics Education in Sustainable Development Goals","authors":"N Suprapto, H N Hidaayatullaah","doi":"10.1088/1742-6596/2623/1/012001","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012001","url":null,"abstract":"Abstract This research explores university students’ perspectives on integrating sustainable development goals in physics education subjects (SDGs-PE). However, there is a few research that focuses on SDGs-PE. This research adopts a quantitative survey and is supported by a qualitative interview design. Fifty-two university students participated in the survey to fulfill the SDGs-PE instrument, and five interview participants for data collection. An exploratory factor analysis (EFA) and descriptive analysis were used to achieve the research’s goals. The research indicated that the SDGs-PE fulfills the criteria of validity and reliability. The construct validities of the SDGs-PE varied from .538 to .886 and explained 64.26% of the variance. Overall, the Cronbach’s alpha coefficient of the instrument was .812. This research has also highlighted the integration of physics education, education for sustainable development, and sustainable development goals.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"29 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135763919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2636/1/012035
Hongyu Pan, Zhenyu Zhao, Congtong Zhang, Kai Chen, Han Zhou, Shuangquan Liu, Qiyu Yang, Tianyu Jin
Abstract Renewable energy penetration presents challenges for power systems, including unit reconfiguration, resource allocation, and potential electricity shortage. In Yunnan Province, where hydropower is a dominant energy source, annual power and electricity imbalance is a serious issue due to insufficient hydropower regulation capacity and less scheduling flexibility. To address these problems, a rolling dispatch method is proposed to connect medium- and long-term scheduling with short-term scheduling, providing hourly start-stop statuses and output plans for units throughout the year and effectively solving power imbalance issues. Additionally, an economic benefit and electricity shortage analysis of the Longpan leading reservoir in the Jinsha River Basin is conducted, resulting in a 13 billion kWh annual power generation increase and approximately 4 billion yuan in direct economic benefits, greatly improving Yunnan Province’s adjustment ability from dry seasons to wet seasons.
{"title":"Analysis of annual power and electricity balance of hydro-thermal system in Yunnan province based on rolling dispatch with leading reservoir","authors":"Hongyu Pan, Zhenyu Zhao, Congtong Zhang, Kai Chen, Han Zhou, Shuangquan Liu, Qiyu Yang, Tianyu Jin","doi":"10.1088/1742-6596/2636/1/012035","DOIUrl":"https://doi.org/10.1088/1742-6596/2636/1/012035","url":null,"abstract":"Abstract Renewable energy penetration presents challenges for power systems, including unit reconfiguration, resource allocation, and potential electricity shortage. In Yunnan Province, where hydropower is a dominant energy source, annual power and electricity imbalance is a serious issue due to insufficient hydropower regulation capacity and less scheduling flexibility. To address these problems, a rolling dispatch method is proposed to connect medium- and long-term scheduling with short-term scheduling, providing hourly start-stop statuses and output plans for units throughout the year and effectively solving power imbalance issues. Additionally, an economic benefit and electricity shortage analysis of the Longpan leading reservoir in the Jinsha River Basin is conducted, resulting in a 13 billion kWh annual power generation increase and approximately 4 billion yuan in direct economic benefits, greatly improving Yunnan Province’s adjustment ability from dry seasons to wet seasons.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"31 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2633/1/012005
Partha P Das, Wang Pei, Chenxi Niu
Abstract In this research, we investigate control of a hypersonic vehicle (HV) following its reentry into the Earth’s atmosphere, using deep reinforcement learning (DRL) in a continuous space. Here, we incorporate the basic kinematic and force equations of motion for a vehicle in an atmospheric flight to formulate the reentry trajectory satisfying the boundary constraints and multiple mission related process constraints. The aerodynamic model of the vehicle emulates the properties of a common aero vehicle (CAV-H), while the atmospheric model of the Earth represents a standard model based on US Standard Atmosphere 1976, with significant simplification to the planetary model. In an unpowered flight, we then control the vehicle’s trajectory by perturbing its angle of attack and bank angle to achieve the desired objective, where the control problem is based on different actor-critic frameworks that utilize neural networks (NNs) as function approximators to select and evaluate the control actions in continuous state and action spaces. First, we train the model following each of the methods, that include on-policy proximal policy approximation (PPO) and off-policy twin delayed deterministic policy gradient (TD3). From the trajectory generated, we select a nominal trajectory for each algorithm that satisfies our mission requirements based on the reward model.
{"title":"Reentry trajectory design of a hypersonic vehicle based on reinforcement learning","authors":"Partha P Das, Wang Pei, Chenxi Niu","doi":"10.1088/1742-6596/2633/1/012005","DOIUrl":"https://doi.org/10.1088/1742-6596/2633/1/012005","url":null,"abstract":"Abstract In this research, we investigate control of a hypersonic vehicle (HV) following its reentry into the Earth’s atmosphere, using deep reinforcement learning (DRL) in a continuous space. Here, we incorporate the basic kinematic and force equations of motion for a vehicle in an atmospheric flight to formulate the reentry trajectory satisfying the boundary constraints and multiple mission related process constraints. The aerodynamic model of the vehicle emulates the properties of a common aero vehicle (CAV-H), while the atmospheric model of the Earth represents a standard model based on US Standard Atmosphere 1976, with significant simplification to the planetary model. In an unpowered flight, we then control the vehicle’s trajectory by perturbing its angle of attack and bank angle to achieve the desired objective, where the control problem is based on different actor-critic frameworks that utilize neural networks (NNs) as function approximators to select and evaluate the control actions in continuous state and action spaces. First, we train the model following each of the methods, that include on-policy proximal policy approximation (PPO) and off-policy twin delayed deterministic policy gradient (TD3). From the trajectory generated, we select a nominal trajectory for each algorithm that satisfies our mission requirements based on the reward model.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"31 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract As we know, the ply angle deviation of Carbon Fiber Reinforced Polymer(CFRP) reflector is difficult to obtain accurately in engineering applications, it will make thermal deformation of reflector unpredictable due to the discreteness of ply angle. In this paper, based on constitutive relationships between generalized internal force and strain of laminated composite, a novel ply angle deviation model based on normal distribution is proposed. Furthermore, an orthogonal test was designed and significance analysis were carried out by means of a 2.6m aperture reflector with polygonal back structure. Assumed that the ply angle deviation obeys normal distribution, a number of samples were further randomly generated, and the sample mean and standard deviation of the thermal deformation of reflector were calculated. According to χ2-test of goodness of fit, the thermal deformation of reflector still follows normal distribution. Finally, an example was employed to verify the validity and effectiveness of the proposed method. The results reach a good agreement with the experimental data, thus it is capable of providing a promising prospect for engineering practice.
{"title":"Numerical simulation of ply angle deviation and thermal deformation behavior of CFRP reflector","authors":"Wenjian Jiang, Hengkun Jiang, Tonglong Huo, Yun Liang","doi":"10.1088/1742-6596/2633/1/012012","DOIUrl":"https://doi.org/10.1088/1742-6596/2633/1/012012","url":null,"abstract":"Abstract As we know, the ply angle deviation of Carbon Fiber Reinforced Polymer(CFRP) reflector is difficult to obtain accurately in engineering applications, it will make thermal deformation of reflector unpredictable due to the discreteness of ply angle. In this paper, based on constitutive relationships between generalized internal force and strain of laminated composite, a novel ply angle deviation model based on normal distribution is proposed. Furthermore, an orthogonal test was designed and significance analysis were carried out by means of a 2.6m aperture reflector with polygonal back structure. Assumed that the ply angle deviation obeys normal distribution, a number of samples were further randomly generated, and the sample mean and standard deviation of the thermal deformation of reflector were calculated. According to χ2-test of goodness of fit, the thermal deformation of reflector still follows normal distribution. Finally, an example was employed to verify the validity and effectiveness of the proposed method. The results reach a good agreement with the experimental data, thus it is capable of providing a promising prospect for engineering practice.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"32 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2623/1/012020
N A Fauziyah, None Sakinah, W Rachma, S Paratapa, D S Perwitasaric, P C Wardhani, E N Hidayah
Abstract This work’s most notable memory concept for next-generation novels was a reversible phase shift in a substance called phase change materials (PCMs). Here, a polyethylene glycol (PEG) polymer relaxation study employing DMA will be conducted to investigate the qualities of PCMs as superior materials. Through the method of wet mixing, PEG polymer with reinforcement made of silica was synthesized. The variation of silica xerogel was a composition of up to 20% silica xerogel. Adding silica is quite good in reducing the loss factor up to 50 MPa at the addition of 20% silica xerogel. This condition was due to the bonds formed in the polymer chain causing shrinkage and flexibility of composites. Due to the addition of silica xerogel as filler, we can study the relaxation behavior and loss factor of a material using DMA and learn more about its viscoelastic characteristics, including its capacity to absorb vibrations, resistance to impacts, and overall mechanical performance at various temperatures. Relaxation was frequently used to describe phase change materials (PCMs), especially when discussing their capacity to store thermal energy. The release or absorption of thermal energy by a PCM during its phase transition was referred to as the relaxation process.
{"title":"Dynamic and Relaxation of PEG polymer Chain Segment for Phase Change Materials (PCMs)","authors":"N A Fauziyah, None Sakinah, W Rachma, S Paratapa, D S Perwitasaric, P C Wardhani, E N Hidayah","doi":"10.1088/1742-6596/2623/1/012020","DOIUrl":"https://doi.org/10.1088/1742-6596/2623/1/012020","url":null,"abstract":"Abstract This work’s most notable memory concept for next-generation novels was a reversible phase shift in a substance called phase change materials (PCMs). Here, a polyethylene glycol (PEG) polymer relaxation study employing DMA will be conducted to investigate the qualities of PCMs as superior materials. Through the method of wet mixing, PEG polymer with reinforcement made of silica was synthesized. The variation of silica xerogel was a composition of up to 20% silica xerogel. Adding silica is quite good in reducing the loss factor up to 50 MPa at the addition of 20% silica xerogel. This condition was due to the bonds formed in the polymer chain causing shrinkage and flexibility of composites. Due to the addition of silica xerogel as filler, we can study the relaxation behavior and loss factor of a material using DMA and learn more about its viscoelastic characteristics, including its capacity to absorb vibrations, resistance to impacts, and overall mechanical performance at various temperatures. Relaxation was frequently used to describe phase change materials (PCMs), especially when discussing their capacity to store thermal energy. The release or absorption of thermal energy by a PCM during its phase transition was referred to as the relaxation process.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"32 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135764206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1088/1742-6596/2636/1/012010
Yang Gao, Siyue Lu, Longfei Ma, Jiani Zeng, Yutong Zhao, Baoqun Zhang, Hui Xu, Xiangyan Yang, Shaobin Yang
Abstract In recent years, multi-energy complementation has been deepening, and the application rate of new energy sources has been increasing. A multi-timescale optimal scheduling strategy is proposed to mobilize the energy flexibility of residential integrated energy systems (RIES) and to reduce the negative impact of source-load forecast uncertainty on the scheduling plan. Firstly, for the energy supply structure of RIES, the operation constraint model of each energy hub equipment is established. Then, the optimal scheduling is divided into three stages: day-ahead planning, intra-day planning, and real-time planning, each of which will consider the volatility of source-load prediction and determine the operation status of the equipment according to its importance level. The experimental results show that the proposed multi-timescale scheduling strategy can ensure the economy while minimizing the deviation of the main grid power purchase in the real-time and day-ahead phases, providing a basis for the development of new energy capacity in the grid to grow to higher penetration rates.
{"title":"A Multi-timescale Scheduling Strategy for Residential Integrated Energy System","authors":"Yang Gao, Siyue Lu, Longfei Ma, Jiani Zeng, Yutong Zhao, Baoqun Zhang, Hui Xu, Xiangyan Yang, Shaobin Yang","doi":"10.1088/1742-6596/2636/1/012010","DOIUrl":"https://doi.org/10.1088/1742-6596/2636/1/012010","url":null,"abstract":"Abstract In recent years, multi-energy complementation has been deepening, and the application rate of new energy sources has been increasing. A multi-timescale optimal scheduling strategy is proposed to mobilize the energy flexibility of residential integrated energy systems (RIES) and to reduce the negative impact of source-load forecast uncertainty on the scheduling plan. Firstly, for the energy supply structure of RIES, the operation constraint model of each energy hub equipment is established. Then, the optimal scheduling is divided into three stages: day-ahead planning, intra-day planning, and real-time planning, each of which will consider the volatility of source-load prediction and determine the operation status of the equipment according to its importance level. The experimental results show that the proposed multi-timescale scheduling strategy can ensure the economy while minimizing the deviation of the main grid power purchase in the real-time and day-ahead phases, providing a basis for the development of new energy capacity in the grid to grow to higher penetration rates.","PeriodicalId":44008,"journal":{"name":"Journal of Physics-Photonics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135765003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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