Journal of Solar Energy Engineering-transactions of The Asme最新文献_第4页

Influence of Correlations on the Thermal Performance Modeling of Parabolic Trough Collectors 相关性对抛物线槽集热器热性能建模的影响

4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-05-04 DOI: 10.1115/1.4062170

Julian Osorio, Tugba Sensoy, Alejandro Rivera, Gustavo A Patino-jaramillo, Juan C Ordonez

{"title":"Influence of Correlations on the Thermal Performance Modeling of Parabolic Trough Collectors","authors":"Julian Osorio, Tugba Sensoy, Alejandro Rivera, Gustavo A Patino-jaramillo, Juan C Ordonez","doi":"10.1115/1.4062170","DOIUrl":"https://doi.org/10.1115/1.4062170","url":null,"abstract":"Abstract The influence of correlations on the thermal performance modeling of parabolic trough collectors was analyzed in this work. A versatile model for a parabolic trough collector was developed that allows one- and two-dimensional analysis and enables the use of correlations to calculate thermophysical properties and convection heat transfer coefficients. The model also allows the use of constant values for properties and/or coefficients obtained from the evaluation correlations at a specific temperature. The effect of each correlation was evaluated independently, and the results were compared with a reference case that considered a two-dimensional approach and used all the correlations. For the analyzed cases, the correlation for the absorber emittance has the strongest impact on the collector efficiency, leading to a lower error when used. Based on the results, a one-dimensional model approach considering a correlation for the absorber emittance leads to efficiency errors below 3% for collector lengths of up to 243.6 m. Compared with the reference case, a one-dimensional approach using all correlations for a collector with a length of 500 m, and operating with an inlet temperature of 773 K, can result in errors around 9%. However, using constant values for properties and heat transfer coefficients could lead to errors of up to 50%. Multiple thermal models for parabolic trough collectors proposed in the literature rely on a one-dimensional approach, estimated values for the heat transfer coefficients, and constant thermophysical properties. The errors associated with those approaches are analyzed and quantified in this work as a function of the collector length and operation temperature.","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136265185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

EXPERIMENTAL PERFORMANCE OF A NONLINEAR CONTROL STRATEGY TO REGULATE TEMPERATURE OF A HIGH TEMPERATURE SOLAR REACTOR 高温太阳能堆温度非线性控制策略的实验研究

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-05-04 DOI: 10.1115/1.4062483

Assaad Alsahlani, Nesrin Ozalp

{"title":"EXPERIMENTAL PERFORMANCE OF A NONLINEAR CONTROL STRATEGY TO REGULATE TEMPERATURE OF A HIGH TEMPERATURE SOLAR REACTOR","authors":"Assaad Alsahlani, Nesrin Ozalp","doi":"10.1115/1.4062483","DOIUrl":"https://doi.org/10.1115/1.4062483","url":null,"abstract":"\u0000 Despite the significant potential of solar thermochemical process technology for storing solar energy as solid-state solar fuel, several challenges have made its industrial application difficult. It is important to note that solar energy has a transient nature that causes instability and reduces process efficiency. Therefore, it is crucial to implement a robust control system to regulate the process temperature and tackle the shortage of incoming solar energy during cloudy weather. In our previous works, different model–based control strategies were developed namely a Proportional Integral Derivative controller (PID) with gain scheduling and adaptive Model Predictive Control (MPC). These methods were tested numerically to regulate the temperature inside a high temperature tubular solar reactor. In this work, the proposed control strategies were experimentally tested under various operation conditions. The controllers were challenged to track different setpoints (500oC, 1000oC, and 1450oC) with different amounts of gas/particles flowrates. Additionally, the flow controller was tested to regulate the reactor temperature under a cloudy weather scenario. The ultimate goal was to produced 5 kg of reduced solar fuel magnesium manganese oxide (MgMn2O4) successfully, and the controllers were able to track the required process temperature and reject disturbances despite the system's strong nonlinearity. The experimental results showed a maximum error in the temperature setpoint of less than 0.5% (6°C), and the MPC controller demonstrated superior performance in reducing the control effort and rejecting disturbances.","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42596787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nonimaging behavior of circular trough concentrators with tubular receivers 管状接收器圆槽浓缩器的非成像行为

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-05-04 DOI: 10.1115/1.4062482

Matteo Timpano, T. Cooper

{"title":"Nonimaging behavior of circular trough concentrators with tubular receivers","authors":"Matteo Timpano, T. Cooper","doi":"10.1115/1.4062482","DOIUrl":"https://doi.org/10.1115/1.4062482","url":null,"abstract":"\u0000 This paper presents a detailed analysis of the optical performance of circular trough concentrators with tubular receivers. First, a simple analytical formula for the achievable geometric concentration ratio as a function of the rim angle and acceptance angle is developed. Notably, the development reveals the existence of three distinct concentration ratio regimes: a first regime where the receiver is sized based on reflection of the edge rays from the rim alone; a second regime where the receiver is sized based on the rim and the edge ray caustics; and a third regime where two reflections from the mirror are permitted. Several exemplary designs are proposed and further analyzed using Monte Carlo ray tracing to obtain transmission angle curves and receiver flux distributions. For an acceptance angle of 1°, the circular trough concentrator with circular receiver is found to achieve a maximum geometric concentration ratio of 7.695× with a peak flux of 30 suns. For large acceptance angles (10°), the circular trough achieves a geometric concentration ratio as high as 82% of that of a parabolic trough. This noteworthy performance, together with the fact that a circular mirror is amenable to an inflated polymer construction, make this configuration promising for low-cost, low-concentration solar thermal applications.","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42335638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

In Memoriam: Professor Essam E. Khalil - A Tribute to an Outstanding Educator and Researcher 纪念:Essam E. Khalil教授-向一位杰出的教育家和研究者致敬

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-05-04 DOI: 10.1115/1.4062476

M. Awad, S. Sherif, Heba Allah E.E. Khalil, A. Khalil, Tom I-P. Shih, Omar Abdelaziz, T. Abdel-Salam, Ryoichi S. Amano, Ashwani K. Gupta, Michael Brooks, B. Khandelwal, Nesrin Ozalp, David Carrington, S. Aggarwal, Dr. Sumanta Acharya, F. Mashayek, Xiuling Wang, W. E. Lear

引用次数: 0

Heat and Mass Transfer, Quality, Performance Analysis, and Modeling of Thin Layer Drying Kinetics of Banana Slices 香蕉切片的传热传质、品质、性能分析及薄层干燥动力学建模

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-04-28 DOI: 10.1115/1.4062447

Anand Kushwah, Ashok Kumar, M. Gaur, A. Pal

{"title":"Heat and Mass Transfer, Quality, Performance Analysis, and Modeling of Thin Layer Drying Kinetics of Banana Slices","authors":"Anand Kushwah, Ashok Kumar, M. Gaur, A. Pal","doi":"10.1115/1.4062447","DOIUrl":"https://doi.org/10.1115/1.4062447","url":null,"abstract":"\u0000 In this study, experimental works were carried out in three different drying methods named HE-ETADS, greenhouse solar dryer (GHSD), and open sun drying (OSD) to compare thin layer drying kinetics, concept of mass transfer, and quality assessment of banana slices. Initial moisture content (MC) of banana slices was obtained 78 ± 2.0% (wb), which decreased to 23.2 ± 2.0% (wb), 25.6 ± 2.0% (wb), and 28.8 ± 2.0 % (wb) in all three drying systems respectively in 9hours of drying time. Average drying rate was evaluated as 7.89, 7.65, and 7.25gwater/g solid.hr in HE-ETADS, GHSD, and OSD, respectively. Weibull model (WM) defines thin layer drying kinetics of banana slices in all three drying processes. Maximum hardness and shrinkage factor of dried banana slices were obtained as 373.6g and 75%, respectively, in HE-ETADS. Effective moisture diffusivity, activation energy, and mass transfer coefficient were computed as 1.11E-07 to 2.48E-07m2s−1, 30.25kJ/mole, 3.21E-04 to 1.0E-04m/s, in HE-ETADS. Similarly, in GHSD and OSD these factors were observed as 1.21E-07 to 2.34E-07m2s−1, 41.25kJ/mole, 3.15E-04 to1.0E-04 m/s and 1.3E-07 to 2.21E-07m2s−1, 56.89kJ/mole, 3.01E-04 to1.0E-04m/s. Maximum total color changes were noted in OSD. Hence, HE-ETADS can potentially dry high moisture content crops effectively within a minimum drying period.","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45679843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance of Modified Conical Solar Still Integrated with Continuous Volume Flow Rate 具有连续体积流量的改进锥形太阳能蒸馏器的性能

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-04-28 DOI: 10.1115/1.4062448

S. Abdallah, Safa M. Aldarabseh

{"title":"Performance of Modified Conical Solar Still Integrated with Continuous Volume Flow Rate","authors":"S. Abdallah, Safa M. Aldarabseh","doi":"10.1115/1.4062448","DOIUrl":"https://doi.org/10.1115/1.4062448","url":null,"abstract":"\u0000 Solar energy desalination process is the most efficient and cost-effective method for producing fresh water from saline water by employing solar energy from the sun's free source of heat. In the current study, experimental and theoretical methods were used to investigate the performance of a novel design of conical solar still integrated with conical glass cover and conical basin area with continuous volume flow rate at different values of volume flow rate, 80, 60, and 40 mL/sec compared to traditional solar still. Experimental results showed that maximum productivity and efficiency can be achieved by utilizing the conical solar still at lower volume flow rate of saline water. Highest efficiency can be obtained by utilizing traditional single solar still (TSS), conical solar still with volume flow rate of 80 mL/sec (CSSF), conical solar still with volume flow rate of 60 mL/sec (CSSH), conical solar still with volume flow rate of 40 mL/sec (CSQ), and conical solar still with volume flow rate of 40 mL/sec with an array of the mirror (CSQM) on average is 28.2, 42.04, 53.78, 63.4, and 69.15 %, respectively. Freshwater productivity of CSQ was enhanced by employing the arrays of the mirror. Daily freshwater productivity of CSSF, CSSH, CSQ, and CSQM was enhanced on average by 221.5%, 160.4%, 157%, and 174.7%, respectively, over the freshwater productivity of TSS. Theoretical model is obtained utilizing Mathcad software and is validated by comparing it with experimental findings. The theoretical results obtained from the mathematical model are in good agreement with the experimental results.","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44944091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of Piecewise-Focusing CST collectors using the System Advisor Model, and comparison to a central receiver system 使用系统顾问模型优化分段聚焦CST收集器，并与中央接收器系统进行比较

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-04-28 DOI: 10.1115/1.4062446

D. Bisset

引用次数: 0

Guidance on Evaluating the Performance of Multigeneration Systems Based on Energetic and Exergetic Criteria 基于能量和火用准则的多发电系统性能评价导则

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-04-20 DOI: 10.1115/1.4062376

Abdulmajeed Alghamdi, S. Sherif

{"title":"Guidance on Evaluating the Performance of Multigeneration Systems Based on Energetic and Exergetic Criteria","authors":"Abdulmajeed Alghamdi, S. Sherif","doi":"10.1115/1.4062376","DOIUrl":"https://doi.org/10.1115/1.4062376","url":null,"abstract":"\u0000 This paper presents an investigation of the performance indices employed in combined or multigeneration thermal systems. Specifically, the following thermal systems will be considered: (1) combined cooling and power (CCP) systems; (2) combined heating and power (CHP) systems; and (3) combined cooling, heating, and power (CCHP) systems. The investigation will highlight the main problems and limitations related to using these indices. We will propose a new procedure for evaluating the performance of CCP systems that can be generalized for use in other combined or multigeneration systems. Employing the subsystems forming any multigeneration system as a reference, the relative saving ratios of energy and exergy are calculated. These saving ratios are used as metrics for the goodness of multigeneration systems. We will also use them to calculate equivalent energetic and exergetic efficiencies of multigeneration systems. These equivalent efficiencies will be used as performance indicators of a multigeneration system as if it were producing only one of its products. The new procedure will be applied to three case studies in this paper. Results of this work indicate that the equivalent exergetic efficiency of power generation is the most meaningful and accurate performance index for assessing the performance of multigeneration systems.","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43807025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design Considerations for Vertical Bifacial Agrivoltaic Installations 垂直双面光伏装置的设计考虑

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-04-12 DOI: 10.1115/1.4062323

{"title":"Design Considerations for Vertical Bifacial Agrivoltaic Installations","authors":"","doi":"10.1115/1.4062323","DOIUrl":"https://doi.org/10.1115/1.4062323","url":null,"abstract":"\u0000 The expected annual energy output of vertical bifacial solar panel arrays was modelled with an eye on how array design attributes affect the output. We considered module height, cell density (single- or double-high racking), inter-row spacing, and inverter connection (rows of modules wired together or separately), and the inclusion of bypass diodes. We observed that these design choices have a substantial impact on the annual energy yield on a per-module basis and per-acre basis. We modeled the instantaneous brightness and shading based on the position of the sun and adjacent rows of modules, which caused non-uniform irradiance due to inter-row shading effects. Based on the irradiance, we calculated current, voltage, and power values throughout a year for different design strategies. Double-high racking, which uses two landscape-oriented modules stacked vertically, offers noteworthy power gains per acre with only a modest increase of inter-row shading. When bypass diodes are included in the module design and improved inverter wiring is used, much of the loss due to inter-row shading is mitigated, and the total power output per acre is nearly doubled, with modules seeing an 80% power increase per acre for 20 ft row spacing, and over 90% power increase per acre for 40 ft spacing).","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":" ","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43496050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Investigation on Solar Drying Characteristics of Ginger (Zingiber officinale) in a Reflector Attached Solar Air Heater and Thermal Energy Storage System using Nano Materials 基于纳米材料的反射式太阳能空气加热器和蓄热系统中生姜的太阳干燥特性研究

IF 2.3 4区工程技术

Journal of Solar Energy Engineering-transactions of The Asme Pub Date : 2023-03-24 DOI: 10.1115/1.4062195

C. Sethi, S. Acharya, P. Patnaik

{"title":"Investigation on Solar Drying Characteristics of Ginger (Zingiber officinale) in a Reflector Attached Solar Air Heater and Thermal Energy Storage System using Nano Materials","authors":"C. Sethi, S. Acharya, P. Patnaik","doi":"10.1115/1.4062195","DOIUrl":"https://doi.org/10.1115/1.4062195","url":null,"abstract":"\u0000 By changing its design and materials, a solar dryer can help to lower consumption and drying time. The dryer was run with a reflector attached zigzag solar air heater thermally coated with 2% MWCNT, 2% CuO, and 96% black paint with a reflector. To check the microstructure and morphology analysis of the nano powders and coated surface XRD, SEM, EDAX and Elemental mapping has also been conducted. In this paper the feasibility of the cabinet dryer with rotating trays was investigated to dry ginger slices in case of attaching a energy storage device. The moisture content of the ginger slices were successfully reduced from 90 – 12% within the time frame of 7 hr 15 min. The different drying characteristics and quality parameters were evaluated and then compared in case of zigzag with coated surface and reflector, with coated surface and with reflector respectively. The results show that using a reflector it increases the air heater's outlet temperature by 10-12%, and using a coated surface increases the temperature by another 8–10%. The average thermal and exergy efficiency of an air heater was found to be 70.2 and 4.4 %, respectively. The average overall thermal efficiency of carbon nanotubes + copper oxide-paraffin wax energy storage unit was 31.19%, with 11.9 % as the average overall exergy efficiency. The energy storage increases the drying time near about 3 hr during off sunshine hours.","PeriodicalId":17124,"journal":{"name":"Journal of Solar Energy Engineering-transactions of The Asme","volume":"60 34","pages":""},"PeriodicalIF":2.3,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41308819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0