Table 3.

Main parameters of coal mill in the case study of this paper.

Parameters	Descriptions	Units
m c	Coal quantity	t/h
t c	Raw coal temperature	°C
t in	Primary wind temperature at mill inlet	°C
t out	Primary wind temperature at mill outlet	°C
p in	Primary air pressure at mill inlet	kPa
p out	Primary wind pressure at mill outlet	kPa
∆p	Grinding bowl upper and lower pressure difference	kPa
I m	Coal mill current	A
p b	Furnace negative pressure	kPa
D	Power load	MWe