a) Coolant Flow Rate: Determine the required coolant flow rate. b) Radiator Sizing (Area): Establish the radiator size in terms of surface area, taking into account convective heat transfer between air and coolant. Guidance:
a) Coolant Flow Rate: Determine the required coolant flow rate. b) Radiator Sizing (Area): Establish the radiator size in terms of surface area, taking into account convective heat transfer between air and coolant. Guidance:
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
Consider a high-performance four-cylinder, 1.6-liter Spark-Ignited (SI) automobile engine operating at Wide Open
Throttle (WOT) on a four-stroke cycle. The engine runs at 2000 RPM with a volumetric efficiency of 90%. It
employs gasoline with an Air-Fuel Ratio (AF) of 15.5, exhibits a combustion efficiency of 95%, and assumes zero
exhaust residuals. The targeted heat rejection rate to the coolant is set at 20%.
For the preliminary design of the engine cooling system, utilising a 50/50 Ethylene Glycol-Water Mixture, you are
tasked with the following calculations:
a) Coolant Flow Rate: Determine the required coolant flow rate.
b) Radiator Sizing (Area): Establish the radiator size in terms of surface area, taking into account convective heat
transfer between air and coolant.
Guidance: Conduct research to find reasonable values for parameters such as wall temperature, coolant
thermostat temperature, coolant outlet temperature from the radiator, and convection coefficient in the
radiator.
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