I'm calculating this out over and over again and NOT getting anything close to the answer:
76,900 BTU/hr
A = 31.42 ft^2 = (Pi)(D)(L)
Q = h(A)(T_s - T_a) + (Sigma)(A)(e)[(T_s + 460)^4 - (T_a + 460)^4]
Q = (5)(31.42)(450-65) + (0.1714(10)^-3)(31.42)(0.5)(910^4 - 525^4)
I've calculated the above about a billion times and I'm not getting anything close to 76,900 or 77,000
I've done this on my calculator and a spreadsheet.
Is anyone else having this problem?
If not, what could I possibly doing wrong that this isn't computing?
76,900 BTU/hr
A = 31.42 ft^2 = (Pi)(D)(L)
Q = h(A)(T_s - T_a) + (Sigma)(A)(e)[(T_s + 460)^4 - (T_a + 460)^4]
Q = (5)(31.42)(450-65) + (0.1714(10)^-3)(31.42)(0.5)(910^4 - 525^4)
I've calculated the above about a billion times and I'm not getting anything close to 76,900 or 77,000
I've done this on my calculator and a spreadsheet.
Is anyone else having this problem?
If not, what could I possibly doing wrong that this isn't computing?
