Many people purchasing industrial furnaces or drying equipment are very concerned about how much electricity a high-temperature annealing furnace consumes per hour and how to calculate the power usage. Since most equipment is customized, the more you understand, the easier it is to select a furnace that fits your production needs. Below is a summary of how to estimate the hourly power consumption of a high-temperature annealing furnace, provided for reference:
Understanding Furnace Power Loss
- Iron loss is the sum of hysteresis loss and eddy-current loss. It is a fixed value and is approximately equal to no-load loss.
For an 800 kVA transformer, the no-load loss is about 1.2 kW. - Load loss changes according to the operating load, so it can only be estimated.
If you still have the factory test report of the transformer, look for the specification “rated copper loss (short-circuit loss)”.
Copper loss can be calculated as:
Copper Loss = (Working Current / Rated Current)² × Rated Copper Loss
For an 800 kVA transformer, the rated copper loss is about 8.9 kW.
Example Calculation
- Estimated average hourly power consumption:
52,000 kWh ÷ 30 days ÷ 8 hours = 216.7 kWh - Estimated average power per hour:
216.7 kWh / 1 h = 216.7 kW - Estimated average current:
216.7 kW ÷ (1.732 × 380 V × 0.9) = 366 A - Rated current:
800 kW ÷ (1.732 × 400 V) = 1155 A - Estimated copper loss:
(366 A / 1155 A)² × 8.9 kW = 0.89 kW - Hourly copper loss:
0.89 kW × 1 h = 0.89 kWh - Monthly copper loss:
0.89 kWh × 8 hours × 30 days = 213.6 kWh - Hourly iron loss:
1.2 kW × 1 h = 1.2 kWh - Monthly iron loss:
1.2 kWh × 8 hours × 30 days = 288 kWh
Final Monthly Loss Summary
| Item | Monthly Loss |
|---|---|
| Copper loss | 213.6 kWh |
| Iron loss | 288 kWh |
| Total monthly loss | 501.6 kWh |
An 800 kVA transformer consumes roughly 52,000 kWh per month, with about 501 kWh coming from losses.
These are the reference calculations for estimating the hourly and monthly power usage of a high-temperature annealing furnace. If you are interested in this equipment, feel free to contact us for consultation!