EXPERIMENT NO. 2 Aim: To study the construction and working of various boiler mountings and accessories. Theory: A boiler is defined as a closed vessel in which steam is produced from water by combustion of fuel. Also defined as “A combination of apparatus for producing‚ furnishing‚ or recovering heat together with the apparatus for transporting the heat so made available to the fluid being heated and vaporized.” Classification of Boilers : The boilers may be classified according to following
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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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Discussion Questions 1. Which of the characteristics of successful entrepreneurs‚ discussed in this chapter‚ do you see in Jason Jacobs? To what degree do you think these characteristics have contributed to RunKeeper’s success? The characteristic that best describe Jason Jacobs is execution intelligence. Jason Jacobs was able to execute his business idea successfully. He raised money‚ developed a business model‚ and put a venture team of six persons. Jason Jacobs launched RunKeeper application
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1. A serving of two cookies has 150 kcal and 12 grams of fat. What percentage of total calories is fat? Divide fat calories by the kilocalories Fat – 9 kcal 12g x 9kcal= 108 kcal 108kcal / 150 kcal = .72 .72 x 100 = 72% total calories from fat 2. How many grams of protein are in a 2400kcal diet with 15% of total kcal from protein? Grams / total kcal = total percentage of kcal from the protein Protein – 4kcal X / 2400kcal = .15 (15%) 2400kcal x .15 = 360 360 / 4kcal= 90 gm of
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Page 1 of 4 Expansion Devices I. Introduction Expansion devices are basic components of a refrigeration system which carry out two major purposes: (1) the pressure reduction from the condenser to evaporator pressure and (2) the regulation of refrigerant flow into the evaporator. These expansion devices can be generally classified into two types which are namely the fixed opening type (flow area is fixed) and the variable opening type (flow area changes correspondingly with a change in mass
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Introduction: Food industry misleads us by calculating the fat content in packaged food on “weight basis” whereas the fat content (having to do more with the calorific value of a food item and not its weight) actually has to be calculated on the basis of the calorie value of the food item. So‚ the “calorie basis” is what has to be applied to know how much fat our food items actually carry. Here are three interesting eye-openers!! Breakfast: Oatmeal (Single serving = 45 g) Calories in a single
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More than half of the world’s population lives in cities‚ a trend that is rapidly accelerating‚ especially in developing countries. In the USA‚ urban areas are merging into huge megalopitan areas‚ especially along interstate highways. Cities require and use large quantities of energy and materials‚ metabolizing them and generating large quantities of waste products and pollutants‚ resulting in unsustainable environments that adversely affect ecological integrity and diversity
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CHEMISTRY IA: Processing CALORIMETRY QUANTITATIVE DATA TAKEN (07.05.14 and 21.15.14) Initial Pringle Mass H20 Amount Final Pringle Mass Δ Pringle Mass Initial H2O Temp (± 0.5°C) Max H2O Temp (± 0.5°C) Δ H2O Temp (± 0.5°C) SAMPLE 1 10g 225mL 1.85g 10g-1.85g=8.85g 22.3°C 59.8°C 37.5°C SAMPLE 2 10g 225mL 0.95g 10g-0.95g=9.05g 21°C 61.1°C 40.1°C SAMPLE 3 10g 225mL 1.95g 10g-1.95g=8.05g 23°C 58°C 35°C SAMPLE 4 10g 225mL 1.85g 10g-1.85g=8.15g 50.5°C 83°C
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Energy Management H.W 1 1. A hospital is considering the purchase of a large commercial laundry dryer‚ and is attempting to decide between an electric and natural gas powered system. If electricity costs $0.06/kWh and is used with an efficiency of 90%‚ what is the equivalent price of natural gas per therm if it can be burned with an efficiency of 80%? Dimensional Analysis |$.06 |29.3 KWh |.8 efficiency | |.90 efficiency |1 therm
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OCEAN THERMAL ENERGY CONVERSION Abstract Ocean Thermal Energy Conversion (OTEC)‚ to me‚ is the developing worlds answer to OPEC (Organization of Petroleum Exporting Countries). We will no longer have to depend on oil supplies from other countries. OTEC is an efficient‚ clean process‚ which utilizes the difference in temperatures between the oceans surface and its depths to produce energy. The ocean thermal energy conversion process works something like a refrigerator in reverse. The
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