PERFORMANCE EVALUATION OF SOLAR WATER HEATER USING NANOFLUID

J.Ganesh Moorthy M.E
1 PG Scholar, Solar Energy Anna University, Trichy, India.

     Solar water heater is the most popular means of solar energy utilization because of technological feasibility and economic attraction compared with other kinds of solar energy utilization. The system can supply hot water at 50 oC and 80 oC which can be used for both domestic and industrial purposes. Heat transfer enhancement in solar devices is one of the key issues of energy saving and compact designs. Nanofluids are the new kind of heat transfer fluid containing a very small quantity of nano particles that are uniformly and stably suspended in fluids. Nanofluids are high thermal conductivity than conventional fluids. Numerical model of the solar water heating system has been developed by using water and nanofluid as a base fluid. The objective of this paper is to improve the efficiency of solar water heating system by using nanofluids as a working fluid and improving the efficiency of solar water heater than the water as a working fluid by theoretically. The theoretical calculations were made and the result shows that the 10.88% of an improved efficiency is observed at .025% volume fraction of the nanofluids.

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INVESTIGATION ON HIGH PERFORMANCE CONCRETE USING MICRO CALCITE

V.Dass Mohan ¹, Dr.T.Sekar ^2
1 V.Dass Mohan, Assistant Professor, Vickram College of Engineering, Enathi, Sivagangai, India.
² Dr.T.Sekar, Professor, University College of Engineering, Ramanathapuram, India

     This paper is aimed at to evaluate the mechanical properties and durable properties of High Performance Concrete (HPC) with Micro Calcite (MC) as a mineral admixture. In this project, the cement is replaced by MC powder with five different replacement levels, namely, 5%, 10%, 15%, 20% and 25% in HPC of M60 grade. Concrete using the aforesaid replacement levels are prepared and the following tests were conducted in order to find the optimum replacement level of MC. With respect to fresh concrete, the following tests were conducted and the test results are exhibited in tables. Slump cone test and Compaction factor test were conducted. With regard to other samples after 7, 14 and 28 days curing, cube compression, Split tension and flexural strength were found. For all the tests 99 cubes, 54 cylinders and 54 prisms were cast, cured and tested as per Indian standard code provisions. Over and above the conventional test, the following specialized tests were conducted for durability such as permeability test, Sulphate attack test and Chloride attack test. In order to recommend HPC with MC powder for water retaining structures, water tanks etc., permeability test was conducted and the results found suggest it is less permeable than conventional concrete. When this concrete is exposed to chemical fumes, sulphate and chloride attack in sewers, and sewage treatment plant and chemical factories specific test on sulphate and chloride attack were conducted and found to perform better than conventional concrete. Finally the results exhibit that HPC with 15% replacement of cement by Micro calcite gives the maximum strength and very low permeability. It also show a lesser sulphate and chloride attack by showing minimum loss of weight and minimum loss of strength. Thus it is clear that conventional concrete materials in combination with MC mineral admixture can be utilized for making HPC and such concrete can be effectively used in structures which are exposed to severe chemical attacks.

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GRIEVANCES HANDLING SYSTEM FOR RAILWAY ENQUIRIES

A.Lithiya ¹, Dr.R.Kavitha ²

 
¹ PG student- Department of CSE - Vellammal college of Engineering and technology, Madurai, Tamilnadu, India.
² Professor - Department of CSE- Vellammal college of Engineering and technology, Madurai, Tamilnadu, India.

     The project entitled “Grievances Handling System” is designed to develop an on-line speech-to-text engine. The system acquires speech at run time through a microphone and processes the sampled speech to recognize the uttered text. The recognized text can be stored in a file. We are developing this on android platform using eclipse workbench. Our speech-to-text system directly acquires and converts speech to text. Speech recognition for Voice uses a technique based on hidden Markov models (HMM -Hidden Markov Model) in Android Mobile Phones. It is currently the most successful and most flexible approach to speech recognition. Translation system translates Tamil sentences to English Sentences. The Translation is done with the help of word dictionary file. The word dictionary file contains around 5000 words. If a word in an input sentence does not exist in the dictionary file then it will be considered as a proper noun. So those words are transliterated to the target language. Transliteration is implemented using the rule based technique. After the sentences are translated into the target language the morphological analyzing has to be done. This project Grievances Handling System deals with interaction between admin and public to enhance the customer comfort by processing the complaints forwarded by them and reporting them with proper response through mail and SMS. This makes the railway system more efficient to use. Once the complaint reported by the customer he/she will receive with reply soon as the passengers are the source of the railway system. Public can report about any department via telephone (Speech to Text) Process ,The information will be converted into (Tamil To English) English, after the information is stored in Text format (Pdf).The admin view the complaints under every department. And they pass those complaints to the particular department for the further action. Once, the complaint will rectify, that action will stored in action database. And, that action message will send as sms & mail to the people that who registered that complaint. This project is specially designed for Railway department.

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A NOVEL APPROACH FOR DETECTION OF BREATHING BEHAVIOUR AND ITS APPLICATION IN DIAGNOSIS OF SLEEP APNEA

R.C.Kokhila ¹, K.Ramamoorthy ^2
1 PG Scholar, Department of Electronics and Communication Engineering, PSNA college of Engineering and Technology, Dindigul -624619, India.
² Assistant Professor, Department of Electronics and Communication Engineering, PSNA college of Engineering and Technology, Dindigul -624619, India.

     This paper presents a new real-time automated infrared video monitoring technique for detection of breathing anomalies, and its application in the diagnosis of obstructive sleep apnea. We introduce a novel motion model to detect subtle, cyclical breathing signals from video, a new unsupervised self-adaptive breathing template to learn individuals' normal breathing patterns online, and a robust action classification method to recognize abnormal breathing activities and limb movements. We have presented a novel approach to detect breathing signals and to recognize abnormal breathing activity from IR video, and have analyzed the method in identification of episodes of Obstructive Sleep Apnea. The technique runs in real time, is robust to occlusion by a standard hospital bed cover or sheet, variances in patterns of breathing and subject appearance, and substantial changes of camera view relative to the subject. This preliminary study indicates that it has good performance on both the simulated and clinical data. The algorithm uses a novel persistence luminance model that helps to reinforce subtle breathing movements, an activity level to segment the video, and a novel activity template to classify motion events recognizing abnormal breathing activity from body movement is a challenging task in machine vision. In this paper, we present a non-intrusive automatic video monitoring technique for detecting abnormal breathing activities and assisting in diagnosis of obstructive sleep apnoea. The proposed technique utilizes infrared video information and avoids imposing geometric or positional constraints on the patient. The technique also deals with fully or partially obscured patients’ body. A continuously updated breathing activity template is built for distinguishing general body movement from breathing behaviour.

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MULTI INPUT CONVERTER FOR DISTRIBUTED RENEWABLE ENERGY SOURCES

G.Senthil Kumar ¹, J.Mohan ^2
1PG Scholar, Department of EEE, Ranganathan Engineering College, Coimbatore, India.
²Assistant Professor, Department of EEE, Ranganathan Engineering College, Coimbatore, India.

     A new two-input isolated dc-dc converter based on a distributed multi-transformer structure, which is suitable for hybrid renewable energy systems is investigated and designed. The power density of the converter is improved and the circuit structure is simplified because the power devices are completely shared in the primary side and the two filter inductors in the bi-directional DC-DC converters and the isolated transformer in the full-bridge topology are integrated and replaced by the coupled inductors. With the phase-shifted pulse width-modulation (PWM) control, the proposed converter can draw power from two different sources and deliver it to the load individually and simultaneously. The operation principle of the proposed converter has been analyzed in detail. A prototype converter with two different DC voltage sources has been simulated and analyzed with different aspects.

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