plants‚ the benefits reaped would be worth the process. There are two main types of ways to harness the sun’s rays and convert them to energy; through a photovoltaic energy system and a solar-thermal energy system. A photovoltaic system converts sunlight into an electrical current while a solar thermal system harnesses the suns energy and stores it away to heat up any liquids or gases. The cost of producing solar energy‚ harnessing the energy to use during winter seasons‚ and environmental issues
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Transport Processes (SKKK 2313) ASSIGNMENT # 1 1. Consider a steam pipe of length L=20 m‚ inner radius r1=6 cm‚ outside radius r2=8 cm‚ and thermal conductivity k=20 W/m.k. The inner and outer surfaces of the pipe are maintained at average temperatures of T1=150oC and T2=60oC‚ respectively. Obtain a general relation for the temperature distribution inside the pipe under steady conditions‚ and determine the rate of heat loss from the steam through the pipe. Assume that heat transfer is one-dimensional
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temperature profiles and reduces the concentration profiles of the flow. Generally‚ an improved values of Brownian motion parameter tries to remove the concentration gradients and keeps the more pressure near the boundary layer which heats up the thermal boundary layer‚ thereby enhancing the temperature profiles. It is also interesting to mention that the temperature profiles of Oldroyd-B fluid is highly influenced by the Brownian motion parameter. However‚ the concentration profiles are highly influenced
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Localized Surface Hardening Thermochemical Diffusion Chemical Conversion Anodizing Process Ion Implantation Mechanical Treatments Methods of Characterization 18/01/2015 MCG 5138K- Surface Engineering Adding a Surface Layer Galvanizing Process Thermal Spray Process Physical Vapor Deposition Chemical Vapor Deposition Diff. Applications 2 1 18/01/2015 Outline What is Surface Engineering? Objective of Surface Engineering Classification & Selection of Surface Engineering Processes (1) Overlay
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Unit 51: Electrical Technology P1 describe the characteristics and principles of operation of a DC electromagnetic generator. A DC electromagnetic generator produces direct power and also‚ electrical power (just like the AC generator). It is also produced based on same fundamental principle of Faraday’s Law of Electromagnetic induction where whenever a conductor cuts magnetic flux‚ dynamically induced electromotive force is produced‚ and this causes current to flow if the conductor/conductors is
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Concentration PTC Numerical model Solar energy Heat exchanger Double pipe a b s t r a c t Detailed numerical simulations of thermal and fluid-dynamic behavior of a single-pass and double-pass solar parabolic trough collector are carried out. The governing equations inside the receiver tube‚ together with the energy equation in the tube walls and cover wall and the thermal analysis in the solar concentrator were solved iteratively in a segregated manner. The single-pass solar device numerical model
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Heat & Mass Lab 1: | | | 2/10/2011 2/10/2011 Executive Summary This experiment was conducted using a heat transfer unit. Many relationships were obtained and calculated from the observed results. To name a few; the log mean temperature difference‚ heat transfer coefficient‚ Reynolds‚ Nusselt and Graetz numbers. The main focus of this experiment is the heating and cooling of the oil fluid. This was achieved using the heating component in the heat exchanger and water flowing
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GRAPHENE: Nano Material with Macro Potential Abstract With the advent of technological advances in searching new and efficient sources of energy‚ Graphene has been touted to be the next big thing in the areas of energy storage and conversion. Being 200 times more stronger than steel and having current density million times greater than copper (at room temperature)‚ or its intrinsic mobility is a hundred times greater than that of Silicon‚ or its specific area being 2630 (m2/g)
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Introduction The "Building Envelope" is the area that separates conditioned space from unconditioned space or the outdoors. A building envelope includes all elements of a building that enclose conditioned space. Building envelope components separate conditioned spaces from unconditioned spaces or from outside air. For example‚ walls and doors between living areas are part of the building envelope; walls separating a garage from the living areas are not. Besides that‚ floors of conditioned basements
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of the law originally formulated by Ohm. The simplest example of this is: where J is the current density at a given location in a resistive material‚ E is the electric field at that location‚ and σ is a material dependent parameter called the conductivity. This reformulation of Ohm’s law is due to Gustav Kirchhoff. MICROSCOPIC ORIGINS OF OHM’S LAW The dependence of the current density on the applied electric field is essentially quantum mechanical in nature;A qualitative description leading to
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