An experimental investigation was carried out on a computer interfaced single cylinder variable compression ratio, compression ignition engine to optimize the performance characteristics and to find the useful higher compression ratio (UHCR) with hydrogen-diesel dual fuel mode. Experimentations were conducted on five different compression ratios and the performance characteristics were calculated. The effect of blending on NOx, HC, CO, and particulate matter were measured and reported. The rate of heat release and speed of combustion with increase in compression ratio with simultaneous increase in hydrogen substitution were measured. Intake temperature of air was increased and for three different temperatures, the effect of increase in temperature of air-hydrogen mixture on NOx were studied and found that there was a sharp increase in the NOx value as the inlet temperature was increased from 65 to 85°C.

The work presented in this paper is an attempt to evaluate the performance and combustion characteristics of a hydrogen−ethanol dual-fuel combination with different percentage substitutions of hydrogen (i.e., 0−80% with an increment of 20% by volume) and at three different compression ratios of 7:1, 9:1, and 11:1. Experimental investigations have been carried out on a computer-interfaced, four-stroke cycle single-cylinder compression ignition (CI) engine, which was converted for spark ignition (SI) and carburetion. The effect of the compression ratio and increase in percentage of hydrogen substitution on the performance parameters, rate of heat release, and pressure were determined, and the results obtained are reported in this paper.

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©2018 ACCENTS 1.IntroductionNature's gift i.e. water plays an important role in developing and under developing countries. Major problems now a day facing whole world is availability of fresh water for drinking [1]. In the polar region 2% of water is available in fresh form and 1% is being used by humans, plants and animals in their daily life and remaining is in the form of salt water (i.e. Ocean water) [2]. Major health issues are caused due to water contamination. Due to insufficient rain fall salinity water increased rapidly in major parts of the world. The possession of polluting water increases drastically due to increase in population and increase in industrialization, which results affecting the agriculture in rural areas and availability of unreliable fresh water in urban areas. Increase in desertification and drought in worldwide results in shortage of fresh drinking water which is now a biggest problem in the world [3].Current growth in increase in population which may reach up to 800 crores by 2025 (Prediction), reduces water per capita. Two third of population may receive contaminant water due to pollution and exhaustion of water supply by the end of 2025 [4]. Most of the females spend their time in collection of water. *Author for correspondenceDue to untreated water around 3.575 millions of people die in the world due to contamination of water which causes major health issues in rural areas [5].The best solution to overcome the health issue in rural is water purification using desalination. Solar distillation is one of the best method in rural areas, as solar energy is abundantly available in rural areas [6]. Hydrological cycle i.e. evaporation and condensation process is one of the economical technology which can be used both in rural areas and urban areas all over the world for purification water using solar distillation unit (SDU) [7,8].Basic principle involved in SDU / still is evaporation and condensation. The polluted water in the SDU is first heated by solar radiation which passes through the top cover and causes evaporation. Difference between the glass cover and water leads to condense water leaving contamination in still. 2.Solar distillationEarth surface is covers about 77% of water, most of them are either in ice bergs or sea water located at Polar Regions. Water available in form of salty water, and less quantity of fresh form of water which is >1% what is being used by living beings now a days. The problem of purification of water can be solved by using hydrological cycle. Distillation of

In this paper, description of vibration analysis method used for condition monitoring of 500MW steam turbine (Kraftwork Union, Germany) has been discussed. The importance and critical role of this technique in predictive maintenance used in thermal power plant is evaluated based on possible type of failures that can be detected at early stage before any unexpected, unscheduled breakdown during operation of steam turbine. Efforts are being made for most of the steam turbines in power generation thermal plants to run or operate them at Ideal condition by regular technical consultations resulting in continuous generation of power and reasonable increase in operational life span of these turbines. This paper deals with one such effort. In this paper real time condition monitoring of 500MW turbine, which was carried out by them at NTPC-Ramagundum power plant, using vibration analysis, has been discussed without disturbing its operational working condition and the causes for increase in the vibrations and its practical diagnosis by spectrum analysis, Interpretations and recommended steps to be taken to minimize the vibrations.