What is the relationship between device load and energy consumption?

This post was last edited by ylb913 on 2015-6-17 at 16:03. When the load is low, the proportion of heat loss increases, which reduces the efficiency of the motor. Many types of energy consumption do not decrease in proportion to the reduction in load; in fact, they have little to do with the load at all (such as the consumption of air for instruments, lighting power, and office electricity). The specific consumption can have production as the denominator, or raw materials as the denominator. In a refinery, the denominator for the overall energy consumption is the amount of crude oil processed.

The answer is upstairs. Regarding energy consumption, it is a factor that is taken into consideration from the project proposal and feasibility study, all the way through to design and production. Generally, the first three are calculated using the method specified in the project proposal, but when production takes place at the factory, they have their own methods of calculation~

Thank you for always answering my questions! ! I still don’t quite understand it. This energy consumption surely isn’t the total energy consumption, right? The total energy consumption at 100% load must be higher than that at 50% load. I understand that low load leads to low efficiency; low efficiency means higher energy consumption. Could you explain the causal relationship in more detail? Thank you!

With low load, energy consumption is bound to be high; experimental setups simply can’t be factored into the costs!

This post was last edited by ylb913 on 2015-6-18 15:44. Yes, the device’s load is low. The overall energy consumption is low; for example, when the load is at 100%, the energy consumption is 1, while at 50% load it might be 0.6 – it’s unlikely to be 0.5. Although the overall energy consumption is low, the degree of reduction in energy consumption is not as great as the degree of reduction in load, which results in an increase in energy consumption per unit of processed material.

When it comes to the relationship between load and energy consumption, this generally refers to the specific energy consumption, that is, the energy required per ton of product. It can also be calculated based on the volume of material processed, with the energy consumption again being per ton of material processed. With a high load, the processing volume and output volume are naturally large, but the total energy consumption generally does not change much. In other words, there is no linear relationship between changes in total energy consumption and changes in load; for example, the difference in total energy consumption between 50% and 100% load is not significant. This means that at half load, it is possible to save on compressors or several motors, but it is difficult to reduce the energy consumption associated with heat sources such as steam by half. Unit consumption = total energy consumption / total output; when the increase in the denominator is greater than that in the numerator, unit consumption naturally decreases, and vice versa.