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A four-stroke diesel engine burns 70 % of the theoretical fuel (q, = 0.7 x 2800 kJ/kg) and loses 15 % of its power output to friction and parasitic loads. It operates at 2500 rpm where the atmosphere is at 1.013 bar and 22 °C. In addition, it has a volumetric compression ratio of 17:1 and four cylinders, each with a bore of 8.7 cm and a stroke of 10.4 cm. It may be assumed that the clearance volume in the cylinders is negligible. On the basis of this information and using the cold air-standard analysis approach, answer the following questions: 1. What are the temperature (K) and pressure (bar) of the air at the end of the compression stroke? 2. What are the temperature (K) and pressure (bar) of the air at the end of the heating process? 3. What are the temperature (K) and pressure (bar) of the air at the end of the expansion stroke? 4. What is the real work output (kW) of the engine?

A four-stroke diesel engine burns 70 % of the theoretical fuel (q, = 0.7 x 2800 kJ/kg) and loses 15 % of its power output to friction and parasitic loads. It operates at 2500 rpm where the atmosphere is at 1.013 bar and 22 °C. In addition, it has a volumetric compression ratio of 17:1 and four cylinders, each with a bore of 8.7 cm and a stroke of 10.4 cm. It may be assumed that the clearance volume in the cylinders is negligible. On the basis of this information and using the cold air-standard analysis approach, answer the following questions: 1. What are the temperature (K) and pressure (bar) of the air at the end of the compression stroke? 2. What are the temperature (K) and pressure (bar) of the air at the end of the heating process? 3. What are the temperature (K) and pressure (bar) of the air at the end of the expansion stroke? 4. What is the real work output (kW) of the engine?

Elements Of Electromagnetics
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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A four-stroke diesel engine burns 70 % of the theoretical fuel (q. = 0.7 x 2800 kJ/kg) and loses 15 % of its power output to friction and parasitic loads. It operates at 2500 rpm where the atmosphere is at 1.013 bar and 22 °C. In addition, it has a volumetric compression ratio of 17:1 and four cylinders, each with a bore of 8.7 cm and a stroke of 10.4 cm. It may be assumed that the clearance volume in the cylinders is negligible. On the basis of this information and using the cold air-standard analysis approach, answer the following questions: 1. What are the temperature (K) and pressure (bar) of the air at the end of the compression stroke? 2. What are the temperature (K) and pressure (bar) of the air at the end of the heating process? 3. What are the temperature (K) and pressure (bar) of the air at the end of the expansion stroke? 4. What is the real work output (kW) of the engine?
Transcribed Image Text:A four-stroke diesel engine burns 70 % of the theoretical fuel (q. = 0.7 x 2800 kJ/kg) and loses 15 % of its power output to friction and parasitic loads. It operates at 2500 rpm where the atmosphere is at 1.013 bar and 22 °C. In addition, it has a volumetric compression ratio of 17:1 and four cylinders, each with a bore of 8.7 cm and a stroke of 10.4 cm. It may be assumed that the clearance volume in the cylinders is negligible. On the basis of this information and using the cold air-standard analysis approach, answer the following questions: 1. What are the temperature (K) and pressure (bar) of the air at the end of the compression stroke? 2. What are the temperature (K) and pressure (bar) of the air at the end of the heating process? 3. What are the temperature (K) and pressure (bar) of the air at the end of the expansion stroke? 4. What is the real work output (kW) of the engine?
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