ChemRN: Solar & Solar Thermal Energy (Topic)最新文献

An Evaluation of the Energetic Performance of a Residential Hybrid Solar Assisted Air Source Heat Pump Water Heater 住宅混合动力太阳能辅助空气源热泵热水器的能量性能评价

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2021-07-26 DOI: 10.2139/ssrn.3900339

Mandlenkosi Sikhonza, S. Tangwe, C. Manyi-Loh

{"title":"An Evaluation of the Energetic Performance of a Residential Hybrid Solar Assisted Air Source Heat Pump Water Heater","authors":"Mandlenkosi Sikhonza, S. Tangwe, C. Manyi-Loh","doi":"10.2139/ssrn.3900339","DOIUrl":"https://doi.org/10.2139/ssrn.3900339","url":null,"abstract":"The study focused on the operational performance of an installed hybrid solar assisted air source heat pump (ASHP) water heater on a residence. The hybrid solar assisted ASHP water heater comprised of a 200 L solar water heater (SWH) that preheat the water and a 150 L, 1.2 kW ASHP water heater that heat the water to 55 oC. Temperature sensors, flow and power meters are installed at specific locations on the hybrid solar assisted ASHP water heater. These sensors measured the water and refrigerant temperatures, volume of hot water heated by the ASHP unit and the volume of hot water consumed by the occupants as well as the electrical power consumed by the ASHP unit. The preliminary results depict that in the month of February 2019, the average weekday volume of water consumed by the occupants was 238.75 L while the electrical energy consumed, the thermal energy gained and the coefficient of performance (COP) of the ASHP water heater was 1.73 kWh, 6.02 kWh and 3.43, respectively. The average weekday solar energy harnessed, the thermal energy gained by SWH and the solar fraction achieved by the SWH was 11.91 kWh, 6.17 kWh and 0.52, respectively. It can be concluded that, by implementing the hybrid solar assisted ASHP water heater for hot water heating, the overall performance was better compared to the conventional technology.","PeriodicalId":158283,"journal":{"name":"ChemRN: Solar & Solar Thermal Energy (Topic)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128118894","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}

引用次数: 0

Connecting Experimental Synthetic Variables with the Microstructure and Electronic Properties of Doped Ferroelectric Perovskites for Solar Cell Applications Using High-Throughput Frameworks 连接实验合成变量与高通量框架下用于太阳能电池的掺杂铁电钙钛矿的微观结构和电子性能

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2020-07-10 DOI: 10.2139/ssrn.3639773

J. Plata, A. Márquez, S. Cuesta-López, J. Sanz

{"title":"Connecting Experimental Synthetic Variables with the Microstructure and Electronic Properties of Doped Ferroelectric Perovskites for Solar Cell Applications Using High-Throughput Frameworks","authors":"J. Plata, A. Márquez, S. Cuesta-López, J. Sanz","doi":"10.2139/ssrn.3639773","DOIUrl":"https://doi.org/10.2139/ssrn.3639773","url":null,"abstract":"Abstract Doping remains as the most used technique to photosensitize ferroelectric oxides for solar cell applications. However, optimizing these materials is still a challenge. First, many variables should be considered, for instance dopant nature and concentration, synthesis method or temperature. Second, all these variables should be connected with the microstructure of the solid solution and its optoelectronic properties. Here, a computational high-throughput framework that combines Boltzmann statistics with DFT calculations is presented as a solution to accelerate the optimization of these materials for solar cells applications. This approach has two main advantages: i) the automatic and systematic exploration of the configurational space and ii) the connection between processing and electronic properties through the description of changes in the microstructure of the material. One of the most studied doped-ferroelectric systems, [KNbO 3 ] 1 − x [BaNi 1 / 2 Nb 1 / 2 O 3 − δ ] x , is used as a study case. Our results not only agree with previous theoretical and experimental reports, but also explain the effect of some of the variables to consider when this material is synthesized in order to optimize their performance.","PeriodicalId":158283,"journal":{"name":"ChemRN: Solar & Solar Thermal Energy (Topic)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114621230","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}

引用次数: 4

Esign, Simulation and Implementation of Mppt Controlled Buck-Boost Converter Extracting Power From Solar Panel for Microgrid Applications 微电网用Mppt控制降压变换器的设计、仿真与实现

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2019-11-30 DOI: 10.34218/ijeet.10.6.2019.001

Pooja Ainapure, P. Kulkarni, Swapnil U, Atul M. Tiwari

引用次数: 0

Design and Fabrication of Solar Paraboloid Concentrator 太阳能抛物面聚光器的设计与制造

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2019-11-08 DOI: 10.2139/ssrn.3492844

H. Pujar, Sharanabasappa C. Sajjan

引用次数: 0

Characterization of TiO2 Metal Oxides Nanoparticle Synthesized using Plant Extracts and Fabrication of ‘Solar Cell’ using ITO Glass, TiO2, Ruthenium, Graphite and Potassium Iodide 植物提取物合成TiO2金属氧化物纳米粒子的表征及ITO玻璃、TiO2、钌、石墨和碘化钾制备“太阳能电池

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2019-02-12 DOI: 10.2139/ssrn.3498851

D. Jadhav, D. R. D. Kokate

{"title":"Characterization of TiO2 Metal Oxides Nanoparticle Synthesized using Plant Extracts and Fabrication of ‘Solar Cell’ using ITO Glass, TiO2, Ruthenium, Graphite and Potassium Iodide","authors":"D. Jadhav, D. R. D. Kokate","doi":"10.2139/ssrn.3498851","DOIUrl":"https://doi.org/10.2139/ssrn.3498851","url":null,"abstract":"A new type of solar cell is fabricated using the eco-friendly nanoscale-material TiO2. The TiO2 is prepared using the plant extract. The prepared TiO2 material is characterized using Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive X-ray Analysis (EDXA), Transmission Electron Microscope (TEM), X-Ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR) and Raman Spectroscopy. The paste of characterized TiO2 prepared using the dilute nitric acid is coated on the conductive side of the indium doped tin oxide (ITO) glass using the spin coating technique. The prepared thin film is kept in the Ruthenium solution (photosensitive material) for one night. The ruthenium solution acts as a dye on the TiO2 thin film. Furthermore, on another ITO conductive glass, the graphite is coated known as a counter electrode (cathode). The graphite acts as a catalyst. The pores of these layers are filled with a potassium iodide which acts as a redox electrolyte for hole transport between photosensitive TiO2 layer and the counter electrode. The ecofriendly and low-cost solar cell is achieved by the simple overlap of each counter electrode with the back contact of the adjacent photoelectrode.","PeriodicalId":158283,"journal":{"name":"ChemRN: Solar & Solar Thermal Energy (Topic)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116060192","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}

引用次数: 2

Experimental Study on Performance of Solar Thermal Driven Cooling System Versus a Hybrid Mechanical Compression Refrigeration-Solar Thermal Assisted System in Hot Areas 热区太阳能热驱动制冷系统与机械压缩制冷-太阳能热辅助混合制冷系统性能的实验研究

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2018-07-10 DOI: 10.2139/ssrn.3211253

A. Ali

引用次数: 1

An Evaluation of Constituents in Paste for Silicon Solar Cells with Floating Contact Method: A Case Study of Tellurium Oxide Effects 用浮动接触法评价硅太阳能电池膏体成分:以氧化碲效应为例

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2018-04-15 DOI: 10.2139/ssrn.3152258

Takayuki Aoyama, M. Aoki, I. Sumita, Y. Yoshino, A. Ogura

{"title":"An Evaluation of Constituents in Paste for Silicon Solar Cells with Floating Contact Method: A Case Study of Tellurium Oxide Effects","authors":"Takayuki Aoyama, M. Aoki, I. Sumita, Y. Yoshino, A. Ogura","doi":"10.2139/ssrn.3152258","DOIUrl":"https://doi.org/10.2139/ssrn.3152258","url":null,"abstract":"Metallization contacts on emitter of silicon solar cells cause shunting of p-n junction and induce carrier recombination, resulting in a loss in open-circuit voltage Voc of the cells, which must severely limit cell efficiency. But, the mechanism of the shunting and the recombination has not been understood enough yet, especially on the contacts with conductive paste, because the shunting and the recombination caused by the paste come of multiple effects of each constituent in the paste such as silver metal, glass frit, and some additives. Thus, the effects of the each constituent in the paste should be clarified to elucidate the mechanism and to achieve an advanced paste for high-efficiency silicon solar cells. In our previous study, effects of aluminum in silver/aluminum paste and effects of glass frit itself on the shunting and the recombination in n-type solar cells were clearly shown by using “floating contact method”, and its effectiveness on the paste evaluation were demonstrated in the solar cells. In this study, the floating contact method was applied to conventional p-type solar cells with silver paste to clarify effects of tellurium oxide on the silver paste, because the detailed effects of the tellurium oxide on the shunting and the recombination have not been clear yet even though the oxide is widely used for commercial paste. Our study clearly shows that the tellurium oxide reduces the shunting and the recombination caused by the silver paste in the solar cells, and also demonstrates the effectiveness of the floating contact method on the paste evaluation.","PeriodicalId":158283,"journal":{"name":"ChemRN: Solar & Solar Thermal Energy (Topic)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121851551","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}

引用次数: 4

Local Demand-Pull Policy and Energy Innovation: Evidence from the Solar Photovoltaic Market in China 本地需求拉动政策与能源创新:来自中国太阳能光伏市场的证据

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2018-02-20 DOI: 10.2139/ssrn.3127052

Xue Gao, V. Rai

{"title":"Local Demand-Pull Policy and Energy Innovation: Evidence from the Solar Photovoltaic Market in China","authors":"Xue Gao, V. Rai","doi":"10.2139/ssrn.3127052","DOIUrl":"https://doi.org/10.2139/ssrn.3127052","url":null,"abstract":"Market demand is an important driver for inducing innovation, with many empirical studies supporting the demand-induced innovation hypothesis. Critiques of such studies, however, emphasize that new empirical evidence that can address existing empirical challenges is needed. Furthermore, existing literature disagrees about whether the locus of demand-pull policy matters. In this paper, we use empirical evidence from the distributed solar photovoltaic (PV) market in China to address the following questions: (1) Is there evidence of demand-induced innovation? (2) Does the effect of local demand-pull policy differ from the effect of non-local demand-pull policy on demand-induced innovation? To address these questions, we develop and analyze an original database of PV balance-of-system (BOS) patents in the distributed PV market filed between 2005 and 2014 in China. Our results support the demand-induced innovation hypothesis and suggest that only local demand significantly induces PV BOS innovations in the distributed PV market in China. The different effects of local demand and non-local demand emphasize the importance of local markets and local policies, lending some support to bottom-up approaches to clean energy governance.","PeriodicalId":158283,"journal":{"name":"ChemRN: Solar & Solar Thermal Energy (Topic)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133222348","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}

引用次数: 48

Stochastic Modelling of Photovoltaic Power Generation and Electricity Prices 光伏发电与电价的随机模型

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2017-06-12 DOI: 10.2139/ssrn.2927921

F. Benth, Noor Ibrahim

引用次数: 8

Stochastic Modeling of Photovoltaic Power Generation and Electricity Prices 光伏发电与电价的随机建模

ChemRN: Solar & Solar Thermal Energy (Topic) Pub Date : 2017-06-12 DOI: 10.21314/JEM.2017.164

F. Benth, Noor Ibrahim

引用次数: 16