Primary air regulation in thermal power plants

How to evaluate PFC capacity for thermal power plants?

The energy stored in metal and working fluid are the main impact factors for PFC. This paper proposed a universal assessment mechanism to evaluate PFC capability for thermal power plants under various working conditions by decomposing and quantifying the energy state, especially under flexible operating processes.

Can a coal-fired power plant be regulated during short-dynamic operations?

Several regulating strategies in thermal power plants are frequently applied to evaluate the operational capability under a dynamic changing process. Thus, assessing the capability of the coal-fired power plant during short-dynamic operations becomes an urgent problem to be evaluated.

Can a superheater and reheater model the PFC capability of thermal power plants?

This contribution proposed a novel energy state-based mechanism to model and assess the PFC capability for thermal power plants during dynamic changing processes. Superheater and reheater are the main components of the heat exchanging process for a super-critical boiler.

Does a control strategy reduce the power consumption of a primary air fan?

Successful application has demonstrated that the developed control strategy effectively reduces the power consumption of the primary air fan while providing for enhanced regulation of primary air flow and temperature, which can be expected to positively impact the power plant efficiency.

What is a typical primary air system for a coal-fired power plant?

A typical primary air system for a coal-fired power plant is schematically illustrated in Fig. 1. The system is comprised of a total of two primary air fans (1 in Fig. 1) which run at all times, even under low load conditions, mill A through mill F, and air preheaters (4 in Fig. 1 ).

Why should a boiler's dynamic response characteristics be considered in primary frequency regulation?

However, because of the strong coupling characteristics of the dynamic process of thermal energy transfer inside the boiler and the turbine regulating variables, the boiler's dynamic response characteristics should be fully considered in the primary frequency regulation process of the turbine.