Register to reply 
Have i made it right to determine this amounts regarding this questionby trina1990
Tags: astrophysics 
Share this thread: 
#1
May2111, 11:56 AM

P: 24

In a typical Persian architecture, on top of south side windows there is a
structure called "Tabeshband" (shader), which controls sunlight in summer and winter. In summer when the Sun is high, Tabeshband prevents sunlight to enter rooms and keeps inside cooler. In the modern architecture it is verified that the Tabeshband saves about 20% of energy cost. Figure (1) shows a vertical section of this design at latitude of 36°. 0 N with window and Tabeshband. calculate the maximum width of the Tabeshband, X, and maximum height of the window , H in such a way that: i) No direct sunlight can enter to the room in the summer solstice at noon. ii) The direct sunlight reaches the end of the room on the opposite lower corner side of the window(indicated by the point A in the figure) in the winter solstice at noon. provided that the height of the room is 3m & width is 4.50m? 


#2
May2111, 12:02 PM

P: 24

to solve it out i run the stellarium to determine the altitude of sun at summer solstice for that latitude & found it to be approximately 70 degree..then i applied
tan 20=X/3 & answered the X=1.637m for height of the window i found out the altitude at window solstice to be 20 degree & i applied tan20=H1/4.5=1.63 then H=1.36 my question is if the process's to solve it was right & if there any other convenient process to solve it out? 


#3
May2111, 12:07 PM

P: 24

here's a link for the original thread



Register to reply 
Related Discussions  
Titan  Exposed to large amounts of Oxygen  Cosmology  3  
Noninteger amounts of atoms  Chemistry  15  
Probability  4 envelopes contain 4 diff amounts. open one by one  Calculus & Beyond Homework  5  
Applications of Vast Amounts of Electricity?  General Physics  17  
DIfferent Amounts of Oxygen in Combustion?  Chemistry  5 