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Publisher: Springer-Verlag   (Total: 2345 journals)

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Showing 1 - 200 of 2345 Journals sorted alphabetically
3D Research     Hybrid Journal   (Followers: 19, SJR: 0.214, h-index: 10)
4OR: A Quarterly J. of Operations Research     Hybrid Journal   (Followers: 9, SJR: 1.073, h-index: 25)
AAPS J.     Hybrid Journal   (Followers: 20, SJR: 1.192, h-index: 74)
AAPS PharmSciTech     Hybrid Journal   (Followers: 6, SJR: 0.718, h-index: 54)
Abdominal Imaging     Hybrid Journal   (Followers: 14, SJR: 0.723, h-index: 60)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 2, SJR: 0.447, h-index: 12)
Academic Psychiatry     Full-text available via subscription   (Followers: 22, SJR: 0.492, h-index: 32)
Academic Questions     Hybrid Journal   (Followers: 7, SJR: 0.135, h-index: 6)
Accreditation and Quality Assurance: J. for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26, SJR: 0.378, h-index: 30)
Acoustical Physics     Hybrid Journal   (Followers: 10, SJR: 0.355, h-index: 20)
Acoustics Australia     Hybrid Journal  
Acta Analytica     Hybrid Journal   (Followers: 7, SJR: 0.387, h-index: 6)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1, SJR: 0.624, h-index: 34)
Acta Biotheoretica     Hybrid Journal   (Followers: 5, SJR: 0.419, h-index: 25)
Acta Diabetologica     Hybrid Journal   (Followers: 14, SJR: 1.318, h-index: 46)
Acta Endoscopica     Hybrid Journal   (Followers: 1, SJR: 0.113, h-index: 8)
acta ethologica     Hybrid Journal   (Followers: 4, SJR: 0.465, h-index: 23)
Acta Geochimica     Hybrid Journal   (Followers: 3)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 1, SJR: 0.294, h-index: 13)
Acta Geotechnica     Hybrid Journal   (Followers: 7, SJR: 1.818, h-index: 22)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.524, h-index: 32)
Acta Mathematica     Hybrid Journal   (Followers: 11, SJR: 8.021, h-index: 47)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2, SJR: 0.53, h-index: 29)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 5, SJR: 0.406, h-index: 30)
Acta Mathematica Vietnamica     Hybrid Journal   (SJR: 0.451, h-index: 5)
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal   (SJR: 0.22, h-index: 20)
Acta Mechanica     Hybrid Journal   (Followers: 19, SJR: 0.898, h-index: 52)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 5, SJR: 0.426, h-index: 29)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5, SJR: 0.525, h-index: 18)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.524, h-index: 14)
Acta Neurochirurgica     Hybrid Journal   (Followers: 6, SJR: 0.833, h-index: 73)
Acta Neurologica Belgica     Hybrid Journal   (SJR: 0.348, h-index: 27)
Acta Neuropathologica     Hybrid Journal   (Followers: 3, SJR: 6.61, h-index: 117)
Acta Oceanologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.295, h-index: 17)
Acta Parasitologica     Hybrid Journal   (Followers: 9, SJR: 0.581, h-index: 28)
Acta Physiologiae Plantarum     Hybrid Journal   (Followers: 2, SJR: 0.551, h-index: 39)
Acta Politica     Hybrid Journal   (Followers: 13, SJR: 0.658, h-index: 20)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5, SJR: 0.103, h-index: 4)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 20, SJR: 0.871, h-index: 15)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Administration and Policy in Mental Health and Mental Health Services Research     Partially Free   (Followers: 15, SJR: 0.795, h-index: 40)
Adsorption     Hybrid Journal   (Followers: 4, SJR: 0.774, h-index: 52)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 3, SJR: 0.319, h-index: 15)
Advances in Atmospheric Sciences     Hybrid Journal   (Followers: 34, SJR: 0.959, h-index: 44)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 15, SJR: 1.255, h-index: 44)
Advances in Contraception     Hybrid Journal   (Followers: 2)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 53, SJR: 1.113, h-index: 14)
Advances in Gerontology     Partially Free   (Followers: 9, SJR: 0.141, h-index: 3)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 23, SJR: 1.397, h-index: 42)
Advances in Manufacturing     Hybrid Journal   (Followers: 3, SJR: 0.2, h-index: 4)
Advances in Polymer Science     Hybrid Journal   (Followers: 40, SJR: 0.637, h-index: 89)
Advances in Therapy     Hybrid Journal   (Followers: 5, SJR: 0.79, h-index: 44)
Aegean Review of the Law of the Sea and Maritime Law     Hybrid Journal   (Followers: 7)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2, SJR: 0.882, h-index: 23)
Aerobiologia     Hybrid Journal   (Followers: 1, SJR: 0.511, h-index: 36)
Aesthetic Plastic Surgery     Hybrid Journal   (Followers: 9, SJR: 0.821, h-index: 49)
African Archaeological Review     Hybrid Journal   (Followers: 14, SJR: 0.612, h-index: 24)
Afrika Matematika     Hybrid Journal   (Followers: 1, SJR: 0.248, h-index: 6)
AGE     Hybrid Journal   (Followers: 7, SJR: 1.358, h-index: 33)
Ageing Intl.     Hybrid Journal   (Followers: 7, SJR: 0.337, h-index: 10)
Aggiornamenti CIO     Hybrid Journal   (Followers: 1)
Aging Clinical and Experimental Research     Hybrid Journal   (Followers: 3, SJR: 0.529, h-index: 55)
Agricultural Research     Hybrid Journal   (Followers: 3)
Agriculture and Human Values     Hybrid Journal   (Followers: 12, SJR: 1.197, h-index: 49)
Agroforestry Systems     Hybrid Journal   (Followers: 19, SJR: 0.64, h-index: 56)
Agronomy for Sustainable Development     Hybrid Journal   (Followers: 10, SJR: 1.732, h-index: 59)
AI & Society     Hybrid Journal   (Followers: 6, SJR: 0.171, h-index: 19)
AIDS and Behavior     Hybrid Journal   (Followers: 13, SJR: 2.006, h-index: 71)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 3, SJR: 0.706, h-index: 19)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 3, SJR: 0.566, h-index: 18)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.388, h-index: 22)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1, SJR: 0.868, h-index: 20)
Algorithmica     Hybrid Journal   (Followers: 7, SJR: 0.898, h-index: 56)
Allergo J.     Full-text available via subscription   (Followers: 1, SJR: 0.183, h-index: 20)
Allergo J. Intl.     Hybrid Journal   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 4, SJR: 0.729, h-index: 20)
ALTEX : Alternatives to Animal Experimentation     Open Access   (Followers: 3, SJR: 1.392, h-index: 32)
AMBIO     Hybrid Journal   (Followers: 14, SJR: 1.094, h-index: 87)
American J. of Cardiovascular Drugs     Hybrid Journal   (Followers: 10, SJR: 0.864, h-index: 39)
American J. of Community Psychology     Hybrid Journal   (Followers: 24, SJR: 1.237, h-index: 83)
American J. of Criminal Justice     Hybrid Journal   (Followers: 7, SJR: 0.634, h-index: 13)
American J. of Cultural Sociology     Hybrid Journal   (Followers: 11, SJR: 0.283, h-index: 3)
American J. of Dance Therapy     Hybrid Journal   (Followers: 4, SJR: 0.175, h-index: 13)
American J. of Potato Research     Hybrid Journal   (Followers: 2, SJR: 0.558, h-index: 35)
American J. of Psychoanalysis     Hybrid Journal   (Followers: 21, SJR: 0.293, h-index: 13)
American Sociologist     Hybrid Journal   (Followers: 12, SJR: 0.18, h-index: 13)
Amino Acids     Hybrid Journal   (Followers: 7, SJR: 1.362, h-index: 83)
AMS Review     Partially Free   (Followers: 4)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 5, SJR: 0.21, h-index: 37)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 4, SJR: 0.665, h-index: 7)
Analysis in Theory and Applications     Hybrid Journal  
Analysis of Verbal Behavior     Hybrid Journal   (Followers: 4)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 28, SJR: 1.096, h-index: 123)
Anatomical Science Intl.     Hybrid Journal   (Followers: 2, SJR: 0.301, h-index: 26)
Angewandte Schmerztherapie und Palliativmedizin     Hybrid Journal  
Angiogenesis     Hybrid Journal   (Followers: 3, SJR: 2.212, h-index: 69)
Animal Cognition     Hybrid Journal   (Followers: 16, SJR: 1.122, h-index: 55)
Annales françaises de médecine d'urgence     Hybrid Journal   (Followers: 1, SJR: 0.156, h-index: 4)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3, SJR: 1.377, h-index: 32)
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annali dell'Universita di Ferrara     Hybrid Journal   (SJR: 0.504, h-index: 14)
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1, SJR: 1.167, h-index: 26)
Annals of Behavioral Medicine     Hybrid Journal   (Followers: 12, SJR: 2.112, h-index: 98)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18, SJR: 1.182, h-index: 94)
Annals of Combinatorics     Hybrid Journal   (Followers: 3, SJR: 0.849, h-index: 15)
Annals of Data Science     Hybrid Journal   (Followers: 8)
Annals of Dyslexia     Hybrid Journal   (Followers: 9, SJR: 0.857, h-index: 40)
Annals of Finance     Hybrid Journal   (Followers: 28, SJR: 0.686, h-index: 14)
Annals of Forest Science     Hybrid Journal   (Followers: 4, SJR: 0.929, h-index: 57)
Annals of Global Analysis and Geometry     Hybrid Journal   (Followers: 1, SJR: 1.136, h-index: 23)
Annals of Hematology     Hybrid Journal   (Followers: 14, SJR: 1.117, h-index: 62)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 6, SJR: 0.593, h-index: 42)
Annals of Microbiology     Hybrid Journal   (Followers: 9, SJR: 0.402, h-index: 26)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5, SJR: 0.68, h-index: 45)
Annals of Operations Research     Hybrid Journal   (Followers: 8, SJR: 1.186, h-index: 78)
Annals of Ophthalmology     Hybrid Journal   (Followers: 9)
Annals of Regional Science     Hybrid Journal   (Followers: 7, SJR: 0.405, h-index: 42)
Annals of Software Engineering     Hybrid Journal   (Followers: 12)
Annals of Solid and Structural Mechanics     Hybrid Journal   (Followers: 10, SJR: 0.553, h-index: 8)
Annals of Surgical Oncology     Hybrid Journal   (Followers: 11, SJR: 1.902, h-index: 127)
Annals of Telecommunications     Hybrid Journal   (Followers: 7, SJR: 0.315, h-index: 25)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.931, h-index: 31)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5, SJR: 0.992, h-index: 87)
Apidologie     Hybrid Journal   (Followers: 4, SJR: 1.14, h-index: 57)
APOPTOSIS     Hybrid Journal   (Followers: 8, SJR: 1.554, h-index: 87)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2, SJR: 0.354, h-index: 27)
Applications of Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.274, h-index: 20)
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 44, SJR: 0.575, h-index: 80)
Applied Biochemistry and Microbiology     Hybrid Journal   (Followers: 17, SJR: 0.267, h-index: 26)
Applied Categorical Structures     Hybrid Journal   (Followers: 2, SJR: 0.361, h-index: 21)
Applied Composite Materials     Hybrid Journal   (Followers: 47, SJR: 0.705, h-index: 35)
Applied Entomology and Zoology     Partially Free   (Followers: 2, SJR: 0.554, h-index: 34)
Applied Geomatics     Hybrid Journal   (Followers: 3, SJR: 0.323, h-index: 9)
Applied Geophysics     Hybrid Journal   (Followers: 7, SJR: 0.541, h-index: 13)
Applied Intelligence     Hybrid Journal   (Followers: 12, SJR: 0.777, h-index: 43)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3, SJR: 0.358, h-index: 34)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 4, SJR: 0.955, h-index: 33)
Applied Mathematics - A J. of Chinese Universities     Hybrid Journal   (SJR: 0.275, h-index: 8)
Applied Mathematics and Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.37, h-index: 26)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 61, SJR: 1.262, h-index: 161)
Applied Physics A     Hybrid Journal   (Followers: 7, SJR: 0.535, h-index: 121)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 23, SJR: 0.983, h-index: 104)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 7, SJR: 0.677, h-index: 47)
Applied Research in Quality of Life     Hybrid Journal   (Followers: 10, SJR: 0.288, h-index: 15)
Applied Solar Energy     Hybrid Journal   (Followers: 17, SJR: 0.251, h-index: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4, SJR: 0.351, h-index: 9)
Aquaculture Intl.     Hybrid Journal   (Followers: 22, SJR: 0.613, h-index: 40)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 30, SJR: 0.646, h-index: 44)
Aquatic Geochemistry     Hybrid Journal   (Followers: 3, SJR: 0.764, h-index: 39)
Aquatic Sciences     Hybrid Journal   (Followers: 12, SJR: 1.172, h-index: 53)
Arabian J. for Science and Engineering     Hybrid Journal   (Followers: 5, SJR: 0.345, h-index: 20)
Arabian J. of Geosciences     Hybrid Journal   (Followers: 1, SJR: 0.417, h-index: 16)
Archaeological and Anthropological Sciences     Hybrid Journal   (Followers: 21, SJR: 1.056, h-index: 15)
Archaeologies     Hybrid Journal   (Followers: 12, SJR: 0.397, h-index: 13)
Archiv der Mathematik     Hybrid Journal   (Followers: 1, SJR: 0.597, h-index: 29)
Archival Science     Hybrid Journal   (Followers: 52, SJR: 0.804, h-index: 22)
Archive for History of Exact Sciences     Hybrid Journal   (Followers: 7, SJR: 0.28, h-index: 15)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 1, SJR: 0.946, h-index: 23)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (SJR: 4.091, h-index: 66)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.865, h-index: 40)
Archives and Museum Informatics     Hybrid Journal   (Followers: 120)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4, SJR: 2.841, h-index: 40)
Archives of Dermatological Research     Hybrid Journal   (Followers: 6, SJR: 0.9, h-index: 65)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 10, SJR: 0.846, h-index: 84)
Archives of Gynecology and Obstetrics     Hybrid Journal   (Followers: 17, SJR: 0.695, h-index: 47)
Archives of Microbiology     Hybrid Journal   (Followers: 8, SJR: 0.702, h-index: 85)
Archives of Orthopaedic and Trauma Surgery     Hybrid Journal   (Followers: 8, SJR: 1.039, h-index: 56)
Archives of Osteoporosis     Hybrid Journal   (Followers: 2, SJR: 1.092, h-index: 13)
Archives of Sexual Behavior     Hybrid Journal   (Followers: 9, SJR: 1.198, h-index: 74)
Archives of Toxicology     Hybrid Journal   (Followers: 16, SJR: 1.595, h-index: 76)
Archives of Virology     Hybrid Journal   (Followers: 5, SJR: 1.086, h-index: 90)
Archives of Women's Mental Health     Hybrid Journal   (Followers: 13, SJR: 1.264, h-index: 50)
Archivio di Ortopedia e Reumatologia     Hybrid Journal  
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2, SJR: 1.2, h-index: 42)
ArgoSpine News & J.     Hybrid Journal   (SJR: 0.102, h-index: 3)
Argumentation     Hybrid Journal   (Followers: 5, SJR: 0.295, h-index: 18)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arkiv för Matematik     Hybrid Journal   (Followers: 1, SJR: 0.948, h-index: 22)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 1, SJR: 0.797, h-index: 17)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.145, h-index: 8)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 9, SJR: 0.288, h-index: 25)
Artificial Intelligence Review     Hybrid Journal   (Followers: 14, SJR: 0.948, h-index: 48)
Artificial Life and Robotics     Hybrid Journal   (Followers: 7, SJR: 0.231, h-index: 14)
Asia Europe J.     Hybrid Journal   (Followers: 4, SJR: 0.247, h-index: 9)
Asia Pacific Education Review     Hybrid Journal   (Followers: 9, SJR: 0.371, h-index: 17)
Asia Pacific J. of Management     Hybrid Journal   (Followers: 12, SJR: 1.676, h-index: 50)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 11, SJR: 0.353, h-index: 13)
Asia-Pacific Financial Markets     Hybrid Journal   (Followers: 2, SJR: 0.19, h-index: 15)
Asia-Pacific J. of Atmospheric Sciences     Hybrid Journal   (Followers: 20, SJR: 1.006, h-index: 14)
Asian Business & Management     Hybrid Journal   (Followers: 7, SJR: 0.41, h-index: 10)
Asian J. of Business Ethics     Hybrid Journal   (Followers: 7)
Asian J. of Criminology     Hybrid Journal   (Followers: 5, SJR: 0.263, h-index: 8)
AStA Advances in Statistical Analysis     Hybrid Journal   (Followers: 2, SJR: 0.681, h-index: 15)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5, SJR: 0.195, h-index: 5)
ästhetische dermatologie & kosmetologie     Full-text available via subscription  
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 21, SJR: 4.511, h-index: 44)
Astronomy Letters     Hybrid Journal   (Followers: 20, SJR: 0.58, h-index: 30)

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Journal Cover Applied Solar Energy
  [SJR: 0.251]   [H-I: 6]   [17 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1934-9424 - ISSN (Online) 0003-701X
   Published by Springer-Verlag Homepage  [2345 journals]
  • A study of limiting energy and temperature characteristics of photovoltaic
           solar radiation converters
    • Authors: V. M. Evdokimov; V. A. Maiorov
      Pages: 1 - 9
      Abstract: Photovoltaic and thermal characteristics of a photovoltaic converter are studied. The power losses in photovoltaic conversion and the optimal power, current, and voltage and efficiency limit of the converter are determined. A theoretical model is presented for calculating the photoinduced current, reverse saturation current density, diffusion factor, lifetime, and current–voltage characteristic (CVC). The limiting idle voltage, efficiency, and CVC filling factor are determined for various temperatures.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010042
      Issue No: Vol. 53, No. 1 (2017)
       
  • Fabrication and investigation of ultravialet Au-Zn x Cd 1–x
           S-Mo-structures
    • Authors: R. R. Kobulov; S. Yu. Gerasimenko; M. A. Maxmudov
      Pages: 10 - 12
      Abstract: For the first time fabricated and investigated the photovoltaic characteristics of Au-Zn x Cd1–x S-Mofilm structural injection photo detectors sensitive to narrow the ultraviolet region of the electromagnetic spectrum, based on polycrystalline Zn x Cd1–x S layers. It was found by adjusting the flow of ZnS and CdS coming to the surface Mo substrate can control the shape of the spectral sensitivity of the Au-Zn x Cd1–x S-Mo-film structural injection photo detectors. The results will allow to optimize the structure of photo detectors and solar cells based on polycrystalline thin film solar cells.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x1701008x
      Issue No: Vol. 53, No. 1 (2017)
       
  • Thermoelectric effect in the graded band gap Si 1–x Ge x (0.2 ≤ x ≤
           1), Si 1–x Ge x (0.5 ≤ x ≤ 1) solid solutions dependent on the gap
           difference
    • Authors: A. Yu. Leiderman; A. S. Saidov; A. B. Karshiev
      Pages: 13 - 15
      Abstract: The thermoelectric effect, i.e., appearance of thermally stimulated current and voltage during uniform heating in a temperature range from 30 to 250°C, is studied. It is shown that greatest values of the current and voltage appear when maximum band gap difference is observed.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010091
      Issue No: Vol. 53, No. 1 (2017)
       
  • Increase in dependability and efficiency of self-draining water systems of
           solar heat supply
    • Authors: Yu. K. Rashidov; Sh. Yu. Sultanova; Kh. T. Sur’atov
      Pages: 16 - 22
      Abstract: It is shown in the paper that the reliability and efficiency of self-draining systems of the drainback syphon type depend on the atmospheric pressure and heating temperature of the heat carrier in the solar collectors, which affect the value of the allowable drop of the atmospheric pressure in the upper point of the system after it is filled with the heat carrier and achieves the specified heat operation mode. In such systems, the drop of the atmospheric pressure and growth of the heating temperature of the heat carrier lead to an increase in the power consumption for the heat carrier circulation owing to the interruption of the jet in the syphon because of boiling of the heat carrier. An improved structure of the self-draining solar circuit with an active element in the form of a Venturi tube was developed in which there are no such drawbacks under atmospheric pressure, and as compared to the common self-draining system of the drainback syphon type, the power consumption for the heat carrier circulation is reduced to 65–80%. The calculated dependences are given to define the necessary degree of the flow contraction in the Venturi tube and its resistance coefficients.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010133
      Issue No: Vol. 53, No. 1 (2017)
       
  • Experimental studies of the monocrystal and polycrystal characteristics of
           silicon photovoltaic modules under environmental conditions of Tashkent
    • Authors: N. A. Matchanov; A. M. Mirzabaev; B. R. Umarov; M. A. Malikov; A. U. Kamoliddinov; K. A. Bobozhonov
      Pages: 23 - 30
      Abstract: Studies of monocrystalline and polycrystalline silicon photovoltaic modules under environmental conditions of Tashkent were carried out. A decrease in the power of mono-PVM and poly-PVM was revealed, which in the summer period was 30 and 28% respectively. It was shown that, under otherwise equal conditions, the average temperature T t of the poly-PVM appeared to be 2°C lower than T t of the mono-PVM. In this case, both PVM types had average efficiency values of ~13.3%. It was found that the productivity factor of the studied poly-PVM and mono-PVM under environmental conditions of Tashkent was 0.75 and 0.77, respectively.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010108
      Issue No: Vol. 53, No. 1 (2017)
       
  • Investigation of the effect of short term environmental contamination on
           energy production in photovoltaic panels: Dicle University solar power
           plant example
    • Authors: Cem Haydaroğlu; Bilal Gümüş
      Pages: 31 - 34
      Abstract: Solar power is an unlimited source of power in theory when compared to the needs of the planet, however, in practice it is still a source of power convertible to electrical energy on a limited basis. In this context, efficiency of this energy conversion by photovoltaic panels has a great importance. Panel surface taking a sufficient amount of light at the right angle has a direct effect on efficiency. This is related to keeping the panel surface as clear as possible of dust and similar objects which can be reflective and absorptive. The contamination of photovoltaic panels has a negative effect on the energy production of panels. In this study, the effect of panel surface contamination, one of the most important factors affecting panel efficiency, was investigated. The investigation was conducted by comparing data from two panel strings standing very close to each other in a plant, one of which was cleaned regularly and the other left contaminated.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010066
      Issue No: Vol. 53, No. 1 (2017)
       
  • A study of main causes of malfunction and breakdown for PV inverter and
           suggestion of some practical measures
    • Authors: O. S. Kim; N. A. Matchanov; M. A. Malikov; B. R. Umarov
      Pages: 35 - 38
      Abstract: The inverters and modules are main components of solar power plants. If any one of them is failure, result will affect the production of electricity. Through the literatures survey, it is found that the inverter among the lots of parts of the solar power plant occupy the largest portion of the fault, and the failure and malfunction of the inverter are caused by the conductive surges induced through the power system. Based on these results, authors analyzed power disturbance factors and results were compared with IEC international standards. Finally, some practical measures applicable in designing and construction grid tied PV power plant in Uzbekistan were suggested.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010078
      Issue No: Vol. 53, No. 1 (2017)
       
  • Nontracking solar concentrators with louvered heliostats: A calculation
           algorithm
    • Authors: D. S. Strebkov; A. E. Irodionov; N. S. Filippchenkova
      Pages: 39 - 44
      Abstract: An algorithm for calculating the solar radiation flux on the receiving surface of a nontracking parabolic trough concentrator with a louvered heliostat is presented. Cylindrical geometry of the concentrator and shape and arrangement of mirror lamellae of the heliostat make it possible to consider sunlight passage across the mirror system of the module as a whole band, which significantly increases the computational efficiency of the algorithm proposed.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010157
      Issue No: Vol. 53, No. 1 (2017)
       
  • Performance of parabolic through solar power plant under weather
           conditions of the Oujda city in Morocco
    • Authors: H. Ait Lahoussine Ouali; R. Guechchati; M. A. Moussaoui; A. Mezrhab
      Pages: 45 - 52
      Abstract: A numerical simulation of Concentrating Solar Power (CSP) plant based on an Organic Rankine Cycle (ORC) power generation unit integrated with parabolic trough collectors is carried out. For the study we refer to the Solar Electric Generating System VI (SEGS VI), installed in the Mojave desert-California (USA), whose solar field which is constituted by LS2 parabolic trough collectors and we consider the same plant implementation in the region of Oujda city (Morocco). To predict the energy performance, the simulations are carried out using TRNSYS 16 simulation program known for its modularity and flexibility and the external library known as the Solar Thermal Electric Components (STEC) library. The meteorological parameters including Direct Normal Irradiation (DNI), ambient temperature and other weather conditions are taken from meteorological year database provided by a high precision MHP station located in Mohamed Premier University. The obtained results show that the region of East offers great potential in general for implementing this type of plant. In fact, the value of 30 MWe is reached during the strongest sunshine day and the operating time can go from 7 AM until 19 PM for a summer day.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010121
      Issue No: Vol. 53, No. 1 (2017)
       
  • Algorithm to account for nonverticality of the azimuthal axis of the
           concentrator in program tracking of the Sun
    • Authors: S. A. Orlov
      Pages: 53 - 56
      Abstract: Powerful solar stations of tower and modular types include from hundreds to thousands of concentrators and heliostats; thus, there occurs the problem of their control and maintaining the rotations of the concentrator following the apparent motion of the Sun. The optical tracking systems (TS) perform the task of tracking, but maintaining them requires wired or wireless connection with the control panel. The necessity of such a connection makes it possible to consider the problem of program tracking. Unlike optical TS, the accuracy of program tracking is affected by a number of factors, in particular, by nonverticality of the azimuthal axis of the concentrator. Therefore, the program tracking algorithm should include a block that takes into account and compensates for the nonverticality of the azimuthal axis. We have obtained a system of equations that forms the algorithm to account for the nonverticality of the azimuthal axis of the concentrators and estimated the influence of these inaccuracies. It has been shown that an increase in the Sun’s altitude (height) significantly influences the azimuthal angles on axes of rotation, while zenithal corrections are within the range of inaccuracies of the azimuthal axis alignment.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x1701011x
      Issue No: Vol. 53, No. 1 (2017)
       
  • Measurements of solar resources in Uzbekistan
    • Authors: Sh. A. Faiziev; Yu. B. Sobirov
      Pages: 57 - 60
      Abstract: High-precision modern sensors for measuring the solar resources operating in six regions of the Republic of Uzbekistan are studied. The data on incoming solar energy obtained by the ground and satellite stations are analyzed.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010054
      Issue No: Vol. 53, No. 1 (2017)
       
  • Cooling cogeneration cycle
    • Authors: R. Shankar; T. Srinivas
      Pages: 61 - 71
      Abstract: The existed combined power and cooling cycle operates with ammonia–water mixture as working fluid having low cooling due to the vapor at the inlet of evaporator. It also demands high ammonia concentration at turbine inlet to get cooling and suitable only at low sink temperature (10–12°C). A new cooling cogeneration cycle has been proposed and solved to generate more cooling with adequate power generation from single source of heat with two options in working fluids i.e. ammonia–water mixture and LiBr–water mixture. The results show that an increase in cycle maximum temperature is only supporting the power but not the cooling. A suitable range for separator temperature has been developed and optimized to maximize the total output. From this study, the resulted specific power, specific cooling, cycle power efficiency, cycle coefficient of performance (COP) and cycle energy utilization factor (EUF), plant EUF, and specific area of solar collector are 0.008 kW/m2, 0.11 kW/m2, 2%, 0.28, 0.3, 0.13 and 8 m2/kW for ammonia–water cycle and 0.04 kW/m2, 0.3 kW/m2, 9.5%, 0.7, 0.8, 0.37 and 3 m2/kW for LiBr–water mixture plant respectively.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010145
      Issue No: Vol. 53, No. 1 (2017)
       
  • Solar thermal power plants in the world: The experience of development and
           operation
    • Authors: N. R. Avezova; A. E. Khaitmukhamedov; A. Yu. Usmanov; B. B. Boliyev
      Pages: 72 - 77
      Abstract: The main areas of large-scale development of solar energy are: —conversion of solar energy into low-grade heat, and using the latest in heating systems of residential, municipal facilities, public and industrial buildings that consume energy such as temperature capacity; —conversion of solar energy into electricity through photovoltaic and thermodynamic converters. This report provides short information of the dynamics of the creation and operation of solar power plants (SPP) with the thermodynamic conversion, and the criteria for reducing cost of electricity produced from them.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010030
      Issue No: Vol. 53, No. 1 (2017)
       
  • The market of solar panels in the United Kingdom
    • Authors: Athil Al-Ezzi
      Pages: 78 - 84
      Abstract: The aim of this paper is to provide a ‘current picture’ of renewable energy markets in the UK focusing on the market of solar panels. This issue is vital for engineering manufacturing companies to provide some recommendations for their solar investment depending on the future potential market demand, identify their competitors and initial customers and financially demonstrate the effect of the market on their investment. The study is supposed to help in making a decision whether to move forward with further investment into solar installation or not. Throughout this paper, the term PV (photovoltaics) will refer to the technology for solar energy conversion to electricity.
      PubDate: 2017-01-01
      DOI: 10.3103/s0003701x17010029
      Issue No: Vol. 53, No. 1 (2017)
       
  • Thermal performance of V-trough solar air heater with the thermal storage
           for drying applications
    • Authors: M. Eswaramoorthy
      Pages: 245 - 250
      Abstract: It was analysed the thermal performance of V-trough solar air heater with the thermal storage for drying applications. An active V trough solar air heater having concentration ratio of 1.5 with the thermal energy storage is designed and fabricated by using the flat plate non-selective surface embedded by paraffin wax based thermal energy storage. The developed system is tested by thermal performance test at site having the latitude of 12.97° N and longitude of 77.57° E over the period of time with and without the thermal storage. It was found that the incorporation of thermal storage is gives 10% higher thermal performance than without the thermal storage and other existing flat plate air heater. The total cost of the system is INR.30834/- and it saves conventional fuels and saves environment. It was concluded that the proposed system will be more economical if it was hybridized with utilization of the renewable energy sources of heat or waste heat.
      PubDate: 2016-10-01
      DOI: 10.3103/s0003701x16040071
      Issue No: Vol. 52, No. 4 (2016)
       
  • Development and research of the technology for powdering agricultural
           products using solar energy
    • Authors: A. I. Ismanzhanov; N. M. Tashiev
      Pages: 256 - 258
      Abstract: This paper presents the results of studies on the development of the technology for powdering agricultural products using solar energy. It is found that the evaporation of moisture from crushed products (pasty mass) is similar to the evaporation from the free water surface. It is much more intensive than the evaporation from noncrushed products and usually consists of one stage.
      PubDate: 2016-10-01
      DOI: 10.3103/s0003701x16040101
      Issue No: Vol. 52, No. 4 (2016)
       
  • Energy and exergy analysis of solar PV powered reverse osmosis
           desalination
    • Authors: J. S. Akhatov
      Pages: 265 - 270
      Abstract: In the current paper presented short review of the state of the art of solar powered reverse osmosis (RO) desalination systems, basic parameters, energy demand of RO process and also exergy analysis. In order to identify the main energy losses in desalination processes, to improve their performances from a thermodynamic point of view, there is a need for exergy analysis. The exergy analysis or second law analysis involves a comparison of exergy input and exergy destruction along various desalination processes. Using the exergy analysis methodology, presented in the current paper, the specific exergy and exergy flow rates at various points of a RO system can be evaluated. Once exergy flow rates are available, exergy destroyed within any component can be determined from exergy balance.
      PubDate: 2016-10-01
      DOI: 10.3103/s0003701x16040034
      Issue No: Vol. 52, No. 4 (2016)
       
  • Properties of silicon solar cells with a holographic concentrator
    • Authors: M. A. Abdukadyrov; Z. T. Azamatov; A. S. Ganiev; R. A. Muminov; I. A. Khusainov
      Pages: 282 - 283
      Abstract: The processes of photovoltaic conversion in the silicon solar cells (SE) with р +–n–n + structure have been studied while lighting with the holographic concentrator. The dependences of the open-circuit voltages, short circuit current of the solar cell on the lighting level in the range of the solar flux concentration 1–10 units without special cooling.
      PubDate: 2016-10-01
      DOI: 10.3103/s0003701x16040022
      Issue No: Vol. 52, No. 4 (2016)
       
  • Synthesis of TiO 2 nanoparticle using sol–gel route and testing its
           photovoltaic performance in dye-sensitized solar cell
    • Authors: Shalin; Shailendra Kumar Shukla
      Pages: 309 - 314
      Abstract: In the present work, sol–gel method is used to synthesize TiO2 nanoparticle. The characterization of the prepared TiO2 powder is done using Powder X-ray diffraction (powder XRD), Scanning Electron Microscope (SEM), Energy-Dispersive X-Ray Spectroscopy (EDS) and Ultraviolet-Visible Spectrophotometry (UV-Vis). The XRD pattern reveals formation of anatase phase TiO2. The SEM images reveal agglomeration of nanoparticles. The absorbance spectrum of TiO2 nanoparticles was observed with excitonic peaks at 327 nm and the band gap came out to be ~3.2 eV. This prepared TiO2 was tested for photovoltaic performance by using it in the Dye sensitized solar cell (FTO/TiO2/N719/KI-I2/Pt). Conversion of solar light energy to electricity was successfully done using this TiO2. The fabricated cell showed an open-circuit voltage (V OC) of 587 mV and short-circuit current density (J SC) of 5.06 mA/cm2. Maximum power (P max) generated was 1.912 mW/cm2 with a fill factor (FF) of 0.644 and a conversion efficiency of 1.91%.
      PubDate: 2016-10-01
      DOI: 10.3103/s0003701x16040149
      Issue No: Vol. 52, No. 4 (2016)
       
  • Effect of blade number on performance of drag type vertical axis wind
           turbine
    • Authors: M. Zheng; Y. Li; H. Teng; J. Hu; Z. Tian; Y. Zhao
      Pages: 315 - 320
      Abstract: The effect of blade number on performance of drag type vertical axis wind turbine (VAWT) is studied by Ansys numerical simulation, it involves 3-blade, 5-blade and 6-blade VAWTs. The optimized width of blade for each VAWT at maximum power efficiency is obtained, and simulation for the wind turbine with different number of blade is conducted for the VAWTs with turbine radius of 2 m at the inlet wind speed 8 m/s. By simulations, it gets the evolution curve of torque with respect to time, and the cyclical characteristics for these wind turbines. The results show that the maximum power efficiency and the stability of the wind turbine increase with the number of blade of the wind turbine, however the optimal d/D decreases with the number of blade of the wind turbine. The maximum power efficiencies are 20.44, 24.30 and 26.82% for 3-blade, 5-blade and 6-blade wind turbines, and the correspondingly optimal d/D are 0.66, 0.40 and 0.35, respectively. While the optimal rotational rate of turbine decreases with blade number.
      PubDate: 2016-10-01
      DOI: 10.3103/s0003701x16040150
      Issue No: Vol. 52, No. 4 (2016)
       
 
 
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