Figure 1.3. Shows a preheater for a diesel engine that allows the engine to get hot air to facilitate combustion on a cold start. It consists of an insulated and sealed cast Iron chamber in the engine block with a volume of 0.25m² at an initial pressure of 1.5 Bar. The Initial temperature is 50 degrees Celsius. A heating element of 50 Watts is to be applied to the chamber for 0.5 minutes prior to the engine start.

Figure 1.3. Shows a preheater for a diesel engine that allows the engine to get hot air to facilitate combustion on a cold start. It consists of an insulated and sealed cast Iron chamber in the engine block with a volume of 0.25m² at an initial pressure of 1.5 Bar. The Initial temperature is 50 degrees Celsius. A heating element of 50 Watts is to be applied to the chamber for 0.5 minutes prior to the engine start.

Name: Figure 1.3. Shows a preheater for a diesel engine that allows the eng
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Description: Figure 1.3. Shows a preheater for a diesel engine that allows the engine to get hot air tofacilitate combustion on a cold start. It consists of an insulated and sealed cast Iron chamberin the engine block with a volume of 0.25m³ at an initial pressu

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question 4 a. A factory requires electrical power for its machinery along with 80 MW of heat for process heating. The combined demand is achieved by using a superheated Rankine steam cycle in which the turbine is used to supply the electrical power required and the condenser cooling water provides the process heating to the factory. Steam is generated in a boiler at a pressure of 70 bar and it leaves the superheater at a temperature of 400°C. The steam expands through the turbine to a condenser pressure of 3 bar. The turbine isentropic efficiency is 0.85. The steam is condensed to saturated liquid in the condenser and a feed pump increases the condensate pressure to 70 bar for return to the boiler. The feed pump work may be neglected in the calculation. i. Sketch the cycle in a T-s diagram. ii. Calculate the steam mass flow rate required to satisfy the process heating demand. iii. Calculate the power available from the turbine. iv. Determine the thermal efficiency of the cycle.
A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 90 %. There is a total of 10.3 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: Equipment layout and TS diagram for the cycle. Ideal turbine work (KW) Ans:_______________________________ Actual mass of steam bled into the open heater m1’= _____________kg/sec for the heater nearest to the SGU/boiler and m2’ = _____________________kg/sec for the heater nearest to the condenser. Actual engine efficiency (%) Answer: _______________________ Actual Rankine cycle efficiency %…
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