IJOER: November 2019

Engineering Journal: published its volume-5, Issue-11, November 2019 with AD Publications

Material Recovery of the Glassy Slag Produced from Asbestos Containing Waste

AbstractThe present article deals with the option of high-temperature processing of asbestos-cement roof tiles in a plasma reactor. It describes the process of melting this type of waste in a plasma reactor which is aimed at obtaining the resulting product in the form of vitreous slag of the inert nature. The article also briefly comments on the potential recovery of the formed slag which may be used as the secondary material for further manufacture processes.

Keywordsasbestos, glassy slag, ceramic foam.

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The Analysis of Selected Characteristics of Secondary Heat Networks

AbstractA heat network is a pipeline system through which the heat-transferring medium is conveyed, in the required amount and condition, from a source to a heating appliance. The heat loss depends on a number of parameters, such as the temperature of the medium, temperature of the environment where the analysed heat network is located, and the thickness and quality of the installed insulation. The present article deals with the efficiency of the heat distribution system relative to the temperature in the supply pipeline and in the return pipeline in overhead and direct-buried distribution systems, as well as the effect of the heat loss on such efficiency.

Keywordsheat network, efficiency, heat loss, ambient temperature.

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The Prototype of Metal Hydride Hydrogen Compressor with Heat Pump

Abstract The metal hydride materials are characterized by a high pressure gradient as a function of temperature, which has been used in the construction of a compressor that compresses hydrogen by a chemical-thermal cycle. The present paper describes a prototype of a metal hydride compressor working using a heat pump that provides thermal management between metal hydride containers. The principle of the compressor is to use a suitable metal alloy that can absorb and desorbed hydrogen into its intermetallic structure. By heating the alloy, there is a significant increase in pressure, which makes it possible to compress hydrogen without directly contacting the moving parts, thereby increasing process safety.

Keywords hydrogen, metal hydride alloy, metal hydride compressor, heat pump.

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A Survey of Nitrogen Level Estimation in Plants using Image Processing

Abstract— Nutrients in plants are commonly associated with the Nitrogen Content present in the given plant at the given time. The evaluation of Nitrogen content is thus a pretty accurate measure of the health of the Plant in question. Traditional methods of Nitrogen Content estimation relied on either destructive and time-consuming methods which were extremely inefficient or on methods that required human eyesight to compare using a Colour Chart which had a really high probability of being incorrect as the colour on the chart itself may or may not be accurately printed. Thus, the use of Computer based Nitrogen Level estimation Techniques is sought.

This paper tells us about a few techniques used for Nitrogen Estimation and details some of the differences in the techniques whilst giving us a brief idea of the biggest drawbacks of each of the mentioned techniques.

Keywords survey, agriculture, colour detection, comparison, dselm, image processing, image recognition, MATLAB.

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