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Natural Gas is one of the abundant fuel available on the earth and considered as a one of the cleanest fossil fuels. Most of the studies are conducted on CNG with different blends of hydrogen to improve the efficiency of engine and reduce the emission. However, components safety and its compatibility to these fuels were not studied in depth. Project was taken to understand material compatibility of CNG kit components and framing the National standards which can also be used for providing the inputs to international standards like ISO, ECE etc. Various components have been selected a sample base from CNG fuel kit for this study such as Refilling Valve, High Pressure Regulator and Gas Solenoid Valve, Rigid Pipe, low pressure flexible hose, etc. from renowned manufactures in the country and around the globe.

This paper describes the test methodology developed for evaluation of defrost and demist system performance. Test conditions for testing defrost and demist system and evaluation criterion is as mentioned in Automotive Industry Standard AIS 084. The paper describes the process of development of test set up and a test method for testing of defrost and demist systems. We initially started with particular method of performance evaluation including method of area measurement. Subsequently we evolved a method of performance evaluation using image analysis technique. This paper covers comparative study on methods of measurement.