This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: flow (in cubic centimeter per minute) to h 2 . Figure - P1 Gear 2 4. The equations for heating a house are 1 2 1 ( ) q T T R =-and 1 T q C = & and, in a particular case, can be written with time in hours as h h dT T T C Ku dt R-=-, where -C is the termal capacity of the house (BTU/ o F), -T h is the temperature in the house ( o F), -T is the temperature outside the house ( o F), -K is the heat rating of the furnace (=90,000 BTU/hr), -R is the thermal resistance ( o F per BTU/hr), -u is the furnace switch (=1 if the furnace is on an =0 if the furnace is off). It is measured that, with the outside temperature at 32 o F and the house is at 60 o F, the furnace raises the temperature 2 o F in 6 min (0.1 hr). With the furnace off, the house temperature falls 2 o F in 40 min. What are the values of C and R for the house? Pump h 1 h 2 h 3 A B C Figure – P3 h 3 h 2...
View Full Document
This note was uploaded on 10/05/2011 for the course ME me352 taught by Professor Koraykadirsafak during the Spring '11 term at Yeditepe Üniversitesi.
- Spring '11