Jun 30th, 2015
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American Health Science University
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NCERT Research Café is enlightened by a set of four publications relating to the impact of in-service education of teachers (INSET) on classroom transaction and student achievement by S.K. Yadav, Professor & Head, Department of Teacher Education, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi-110016.

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Solar Energy 78 (2005) and applicability considerations of solar combisystemsP.D. Lund*,1Advanced Energy Systems, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT (Espoo), FinlandReceived 7 August 2003; received in revised form 9 February 2004; accepted 29 July 2004Available online 11 September 2004Communicated by: Associate Editor Claudio Estrada-GascaAbstractSizing and applicability of solar combisystems providing both space heating and domestic hot water are investigatedin this paper. The analysis is based on an analytical daily model to predict the average yearly system performance. Thestudy indicates that increasing the collector area in a solar combisystem for higher solar fractions could be economicallyjustied in average or older building stock in northern and central Europe but not yet in low energy or very energyecient buildings nor in a more southern climate. Increasing the size of the heat storage much beyond the daily capacityproved not to be well justied in solar combisystems. 2004 Elsevier Ltd. All rights reserved.Keywords: Solar combisystems; System sizing; Analytical model1. IntroductionAn important design paradigm of active solar heatingsystems has traditionally been to target for applications inwhich the solar output satisfactorily matches with theheat load. Good cases for solar heating are such in whichthe heat load is almost constant over the year or has itsm

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