Steam Turbines The invention of the water turbine was so successful that eventually‚ the idea came about for extracting power from steam. Steam has one great advantage over water-it expands in volume with tremendous velocity. To be the most effective‚ a steam turbine must run at a very high speed. No wheel made can revolve at any speed approaching the velocity that a steam turbine can. By utilizing the kinetic energy of steam flow‚ the turbine could achieve a higher efficiency. As a result
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Steam generation cannot be improved after 55 percent or is not 100-- efficient. Steam generation controls over half of the developed world’s power. Steam power plants use a boiler in which high efficiency typically greater than 90% on the higher heating value. Some manufacturers claim that 98 can be achieved. Steam generation controls over half of the developed world’s power. Steam powerplants are dated back to well over 150 years. Ships have utilized the efficiency of boilers and there
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Isolation of Essential Oils by Steam Distillation Procedure Part A Apparatus 1.) Using a 20- or 25-mL round-bottom flask (for distillation) and a 10-mL round-bottom flask (for collection) assemble a distillation apparatus 2.) Use an aluminum block to heat and insert a water condenser 3.) The collection flask may be immersed in ice to ensure condensation of the distillate Preparing the Spice 1.) Weigh approximately 1.0 g of your spice or herb onto a piece of weighing paper and record the exact
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EXPERIMENT 7 - Distillation – Separation of a Mixture Purpose: a) To purify a compound by separating it from a non-volatile or less-volatile material. b) To separate a mixture of two miscible liquids (liquids that mix in all proportions) with different boiling points. Equipment / Materials: large test tubes(3) clamp (1 or 2) ringstand boiling chips test tube rack (1) heating mantle glass adaptor thermometer adaptor 10-mL graduated cylinder condenser (1 or 2) grease 50- mL round bottom flask 50-
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Isolation of Casein from Milk In this experiment‚ casein was isolated from milk by means of isoelectric precipitation. A percent yield of % was obtained by the group. Introduction Milk is an opaque white or bluish-white liquid secreted by the mammary glands of female mammals‚ serving for the nourishment of their young. This liquid‚ as secreted by cows‚ goats or certain other animals are used by humans as food and as a source of dairy products such as cheese and butter. Milk composition differs
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1 Section 2 – 12:30 to 2:20 Distillation and Fractional Distillation Distillation and Fraction Distillations Purpose: The purpose of distillation is to purify a liquid. Distillations are use to purify contaminates out of water to obtain clean pure water‚ as well as‚ to separate mixtures of liquids into their individual components; e.g. methanol and water. Objective: Distill methanol from water using a simple distillation apparatus and fractional distillation apparatus to determine which
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REFINING PETROLEUM The crude oil obtained from earth’s crust needs to be refined before using it. It is done by a method called fractional distillation which involves separation of two or more liquids having different boiling points. The refining is done by changing the liquid into its gaseous state and then cooling the gaseous mixture at controlled temperatures such that at a time only one of the vapours having boiling point I liquefies first. This is generally done by a special tower called
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Kearney‚ Test results: SEGS LS-2 solar collector‚ Report of Sandia National Laboratories (SANDIA-94-1884)‚ 1994. SOLAR 94‚ 1994‚ pp. 147–150. Energy 60 (1) (1997) 49–59. [5] S.D. Odeh‚ G.L. Morrison‚ M. Behnia‚ Modelling of parabolic through direct steam generation solar collectors‚ Solar Energy 62 (6) (1998) 395–406. [8] J.A. Duffie‚ W.A. Beckman‚ Solar Engineering of Thermal Processes‚ second ed.‚ Wiley Interscience‚ New York‚ 1991 [9] F. Kreith‚ M.S. Bohn‚ Principles of Heat Transfer‚ sixth ed.‚
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Chirality – Isolation of Limonene from Citrus Fruits Introduction: Terpenes are a large and varied class of hydrocarbons produced by a wide variety of plants. Many essential oils belong to the terpene class. They are made up of two or more five carbon units that are called isoprenes. Limonene is a terpene that can be separated from orange peels almost 100% in the (R)-(+)-limonene form. Other citrus fruits like lemons‚ grapefruits‚ limes‚ and tangerines contain the compound as well. The
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Module 2 Mass Spectroscopy [pic] [pic] Diagram of a mass spectrometer Stage 1: Ionisation The sample is injected as a vapour and the atoms are bombarded by fast moving electrons. This causes the molecule to fragment into two or more pieces. When a molecule or part thereof fragments‚ one portion would be positively charged while the second portion will be uncharged. All uncharged fragments are ultimately lost in the machine as mass spectrometers only work with positive ions. Stage 2: Acceleration
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