An insulated, electrically-heated (100 kW) tank contains 400 kg of water at 65°C when its power is lost. Water is withdrawn at a steady rate of 0.4 kg/s and cold water (at 12°C) enters the tank at the same rate. Assume the tank is well-mixed, and neglect heat gains or losses through the tank walls. For the water, c=cp=cv=4200 J/kg C (a) Create a script (m-file) in MATLAB to calculate how long will it take for the tank’s temperature to fall to 25°C. (b) Display the entire program code used for your script created in MATLAB. Make sure that running the script provides a numeric result and include your name as a comment.
An insulated, electrically-heated (100 kW) tank contains 400 kg of water at 65°C when its power is lost. Water is withdrawn at a steady rate of 0.4 kg/s and cold water (at 12°C) enters the tank at the same rate. Assume the tank is well-mixed, and neglect heat gains or losses through the tank walls. For the water, c=cp=cv=4200 J/kg C (a) Create a script (m-file) in MATLAB to calculate how long will it take for the tank’s temperature to fall to 25°C. (b) Display the entire program code used for your script created in MATLAB. Make sure that running the script provides a numeric result and include your name as a comment.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
An insulated, electrically-heated (100 kW) tank contains
400 kg of water at 65°C when its power is lost. Water is
withdrawn at a steady rate of 0.4 kg/s and cold water (at
12°C) enters the tank at the same rate. Assume the tank
is well-mixed, and neglect heat gains or losses through
the tank walls.
For the water, c=cp=cv=4200 J/kg C
(a) Create a script (m-file) in MATLAB to calculate how
long will it take for the tank’s temperature to fall to 25°C.
(b) Display the entire program code used for your script
created in MATLAB. Make sure that running the script
provides a numeric result and include your name as a
comment.
Transcribed Image Text:du
dt
=
Hin - Hout + Q + W₂
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