“reverting” HVAC references (back to human readable)
i would like to “revert” the references provided in the handbook where the VARIABLES are stripped out so i can understand them. right now they just appear to have the UNITS. i can’t understand them this way. it also makes it super difficult to run a problem set since i can’t tell which provided reference may apply to which equation or which problem in books.
anyone able to help me “revert” the eleven equations provided? i think it would be also really helpful for future professional candidates...
THANKS

what do i call #3? Rate of Sensible Heat or Gain due to Infiltration or Ventilation (?):
q(u) [BTU/Hr] = V [CFM] x 1.08 x delta T [degF]
q(u) or “q sub u” = heat loss
V = volumetric flow rate of air (in cubic feet per minute). this is empirically rested and is provided as a given value.
1.08 = is a constant 
# 8: Coefficient of Heat Transmission
Uo [BTU/HrFt^2degF] = (Uw x Aw) + (Uop x Aop) / Ao
all U are in BTU/HrFt^2degF and all A are in Ft^2
Uo = overall coefficient of heat transmission (overall)
Uw/Aw = coefficient of heat transmission or area for window
Uo/Aop = coefficient of heat transmission or area for “opaque wall” (?)
Ao = area of total wall 
#10. Definition of R Value (or Resistance) (?)
R [HrFt^2degF/BTU] = x [inches] / k [constant]
R = Resistance or the hours needed for 1 BTU to pass a given thickness at a temp change of 1 degree Fahrenheit.
x = material thickness
note that “C” is Comsuctsnce which is basically k but for a specific material (leaving out the thickness. so R = 1/C and C = 1/R
Please sign in to leave a comment.
Comments
10 comments