alternating voltage v1 be applied to a primary coil of N1 turns linking a suitable iron core. A current flows in the coil‚ establishing a flux φp in the core. This flux induces an emf e1 in the coil to counterbalance the applied voltage v1 . This e.m.f. is e1 = N1 dφp . dt Assuming sinusoidal time variation of the flux‚ let φp = Φm sin ωt. Then‚ e1 = N1 ωΦm cos ωt‚ The r.m.s. value of this voltage is given by: E1 = 4.44F N1 Φm Now if there is a secondary coil of N2 turns‚ wound on the same core‚ then by
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I DESIGN OF FRICTIONLESS TRAIN SYSTEM USING MAGNETIC LEVITATION A Project report submitted in partial fulfillment of the requirement for the award of degree of BACHELOR OF TECHNOLOGY IN MECHANICAL ENGINEERING Submitted By P. Rekha Punnami - 09241A0390 N. Sahithi Reddy - 09241A0395 Under the Guidance of Dr. ADAPA RAMA RAO Professor & Dean Department Of Mechanical Engineering Gokaraju Rangaraju Institute of Engineering and Technology Bachupally‚ Hyderabad – 500 090
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plants‚ petroleum refineries‚ natural gas processing‚ and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils‚ which cools the coolant and heats the incoming air. Contents | Flow arrangement Countercurrent (A) and parallel (B) flows * Fig. 1: Shell and tube heat exchanger‚ single pass (1–1 parallel flow) * Fig. 2: Shell and
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type or the chilled water type. DIRECT EXPANSION (DX) SYSTEMS In DX systems‚ the air is cooled with direct exchange of heat with refrigerant passing through the tubes of the finned cooling coil. All these systems are comprised of a hermetically sealed or open compressor(s)‚ evaporator (cooling coil fabricated out of copper tubes and aluminum fins)‚ a supply air blower‚ filter‚ a condenser and heat rejection propeller fan. Unitary System In a unitary system‚ the complete cooling system
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Hendershot Fuel Less Generator 2 Hendershot Fuel Less Generator What is a fuel less generator? All over the world‚ people live with the idea that it’s necessary to burn fuel in order to produce power that we can use. We have been persuaded that we have to buy coal‚ coke‚ timber‚ kerosene‚ gasoline‚ diesel‚ propane etc to burn‚ so that we can obtain our precious energy. And yes‚ it is perfectly true that burning these materials will indeed result in energy. And yes‚ we need it
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CHAPTER 1 INTRODUCTION 1.1 INTRODUCTION Transport along with communication‚ forms the core of day to day life of modern world. Conventional rail transport through wide spread is now being considered inefficient in terms of fuel consumption and is time consuming. A genuine replacement for railways which is not only fuel efficient but also highly comfortable and can attain unimaginable velocities of around 450 – 500kms/hr are Maglev Trains whose idea was given by Robert Goddard‚ an American
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51. --------- extends the range of a moving-iron ac ammeter. C a. A shunt b. A multiplier c. Changing number of turns of operating coil d. A series 52. The most sensitive instrument is D a. Moving-iron b. Dynamometer c. Hot-wire d. Permanent-magnet moving coil BRIDGE MEASUREMENT 53. The bridge uses the -------- measurement and operates on ------------- principle. C a. Direct measurement and null indication b. indirect Direct measurement and null indication c. Comparison measurement and null
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play with various numbers but keep in mind that the process and components are the same in all refrigeration units. The outside temperature is 95 degrees Fahrenheit while the inside temperature is about 75 degrees Fahrenheit. The cooling coil temperature
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that is held close to the first wire. The current in the second wire will also be AC and in fact will look very similar to the current flowing in the first wire. It is common to wrap the wire into a coil to concentrate the strength of the magnetic field at the ends of the coil. Wrapping the coil around an iron bar will further concentrate the magnetic field in the iron bar. The magnetic field will be strongest inside the bar and at its ends
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DEVELOPMENT OF AN INDUCTION COOKER. J. Schedel‚ I. Khan( and E Uken( Naval Engineering Services‚ Cape Technikon( ABSTRACT This paper entails the development of an industrial induction cooker. The induction cookers output power is to be controllable over the full desired operating range. The cooker is also to function with all ferrous vessels. The cooker consists of three main components‚ namely the load‚ the inverter stage and the control stage. This paper also briefly discusses the
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