Equipment Failure Rates: Cooling Tower
H14-100 to H14-400
Equipment failure rates, MTBF, MTTR, and downtime statistics for electrical and mechanical plant equipment. Primary data from the USACE PREP reliability database (IEEE Std 3006.8-2018 Table 2), covering ~280 equipment classes. Supplemental data from IEEE motor and transformer surveys.
| equipment type | class code | description | failure rate per year (failures/year) | failures (count) | mdt hours (h) | mtbf hours (h) | mttm hours (h) | mttr hours (h) | standard | survey | unit years (unit-years) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cooling Tower | H14-100 | Cooling tower, atmospheric type (w/o fans, motors, and internal lift pump) | 0.074138 | 24 | 1.14 | 118,158 | 0.99 | 88.92 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 323.7 |
| Cooling Tower | H14-200 | Cooling tower, evaporative type (w/o fans, motors, and internal lift pump) | 0.005821 | 3 | 1.46 | 1,504,800 | 1.44 | 16.67 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 515.3 |
| Cooling Tower | H14-300 | Cooling tower, atmospheric type (with fans, motors, and internal lift pump) | 0.483906 | 502 | 8.28 | 18,103 | 4.34 | 8.77 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 1,037.4 |
| Cooling Tower | H14-400 | Cooling tower, evaporative type (with fans, motors, and internal lift pump) | 0.144195 | 27 | 4.78 | 60,751 | 3.83 | 6.25 | IEEE Std 3006.8-2018 Table 2 | USACE PREP | 187.2 |
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