RCDD · Question #130
The average power consumption in a telecommunications room (TR) is 2260 watts per hour. What is the heat dissipation in BTUs?
The correct answer is B. 7713 BTU. Converting electrical power to heat dissipation uses the factor 1 watt = 3.413 BTU per hour, so 2260 watts yields approximately 7713 BTU.
Question
The average power consumption in a telecommunications room (TR) is 2260 watts per hour. What is the heat dissipation in BTUs?
Options
- A7096 BTU
- B7713 BTU
- C8104 BTU
- D8511 BTU
How the community answered
(24 responses)- A8% (2)
- B71% (17)
- C17% (4)
- D4% (1)
Why each option
Converting electrical power to heat dissipation uses the factor 1 watt = 3.413 BTU per hour, so 2260 watts yields approximately 7713 BTU.
7096 BTU results from using an incorrect conversion factor of approximately 3.14 BTU/watt (coincidentally near pi) rather than the correct 3.413 BTU/watt.
The standard engineering conversion factor is 1 watt equals 3.413 BTU per hour. Multiplying 2260 watts by 3.413 gives 7713.38 BTU, which rounds to 7713 BTU. This calculation is essential for sizing HVAC and cooling systems in telecommunications rooms and data centers.
8104 BTU would require a conversion factor of approximately 3.587 BTU/watt, which overstates the accepted electrical-to-thermal conversion rate.
8511 BTU would require a conversion factor of approximately 3.767 BTU/watt, which is not the accepted standard conversion rate for watts to BTU/hr.
Concept tested: Watts to BTU/hr conversion for cooling load calculations
Source: https://www.tiaonline.org/standard/tia-942-b/
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