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This paper deals with the performance analysis of a 50KWp rooftop grid-connected PV system. The result obtained after the analysis is presented in the written and graphical forms. The installed grid system has an average yearly final array of 3.9h/D. The average yearly inverter efficiency is 91.39% which is among the best. The installed PV system will mitigate carbon dioxide emission by 1538 tons. According to IISc data, this installation is equivalent to planting 2460 Teak trees over a lifetime. The presented grid system has a system efficiency of 12.15% and it generates electricity output equivalent to 42.907 kW. For the performance analysis, the graphs are plotted with the help of Sigma plot, MS-Excel, and MATLAB software.

Background: Chondroid syringomas [CS] are interesting skin adnexal tumours. They have a remarkable pleomorphic-adenoma like morphology in the skin. Though the histopathology of the tumour has been described in detail in literature, cytomorphological studies are restricted to case reports and small case series. For diagnosing a CS on cytology, the index of suspicion must be high, clinical evaluation must be thorough and knowledge of variant existing morphologies is essential. Aim: This study was done with the aim of studying the common and variant cytological features of chondroid syringomas. Methods: This was a retrospective study conducted over a four-year period (2014-17) in the Department of Pathology, VMMC and Safdarjung hospital. Fine needle aspirate smears and biopsy slides were studied. Morphological details were independently reviewed in detail by two pathologists (Dr MS and Dr MA). Result and Conclusion: The conventional biphasic cell morphology of CS was seen in nearly 50% cases. Rest of the cases showed predominance of one or more variant features in few areas and thus CS was only one of the differential diagnosis in these cases. Nevertheless, FNA proved to be fast, inexpensive and a reliable method for diagnosis of chondroid syringoma. The study will be relevant and helpful in the day to day cytological reporting of CS.

The internal leakage flows in external gear and gerotor pumps are often represented by flow through curved constrictions. The nature of this flow can vary from laminar to turbulent and the flow can experience localized cavitation too. In the current literature, there is a scarcity of techniques for accurately modelling such curve-constricted flows which limits the accuracy of the current simulation tools for gear pumps. This paper presents a novel flow model for curve-constricted geometries that is applicable over a wide range of flow regimes including localized cavitation. Using a dimensionless form, the proposed model characterizes the constriction flow velocity as the function of the constriction shape, the pressure difference, and a properly defined cavitation indicator. The functional relationships between these dimensionless parameters are developed based on CFD simulations. The flow model is validated by the means of several experiments conducted on a custom test apparatus. The model presented in this paper can be incorporated in the lumped parameter simulation tools widely used for modelling gear pumps, improving their accuracy in predicting the internal leakages. Consequently, this model will also aid the development of novel energy efficient gear pump designs, where such leakages are kept to a minimum.

The multiobjective optimization (MOO) software package of modeFrontier has recently become popular within industries, academics and research communities. Today, universities as well as research institutes are using modeFrontier optimization toolboxes for teaching and research proposes around the world. One of the reason behind the popularity of the package, is the way it utilizes the available resources in an efficient and integrated manner and providing multidimensional post-processing tools. The user-friendly design optimization environment of modeFrontier integrates various optimization methods with the major computer aided engineering codes and commercial numerical analysis tools. Among the wide range of applications of modeFrontier, the energy sector, particularly, has been highly benefiting from the advancements in design optimization. This article presents the state of the art survey of the novel applications of modeFrontier in this realm.