An Optimization Model Based on Electric Power Generation in Steel Industry

Table 3

Meanings and units of variables in the model.

Sign	Meaning	Unit
𝑡	Unit of time	h
𝑚	Power generation and steam production equipment	—
𝑠	Equipment of steam production	—
S1	Equipment of steam S1 production	—
S2	Equipment of steam S2 production	—
S3	Equipment of steam S3 production	—
g1	Equipment of BFG consumption	—
g2	Equipment of COG consumption	—
g3	Equipment of LDG consumption	—
𝑖	Kinds of gas (BFG, COG, and LDG)	—
𝑘	Kinds of steam (S1, S2,and S3)	—
𝐸^buy𝑡	Outsourcing electricity capacity of 𝑡 time point	kW
𝐸^gen𝑚,𝑡	Generation capacity of equipment 𝑚 in 𝑡 time point	kW
𝑓1,𝑡	Power coal consumption of equipment 1# in 𝑡 time point	𝑡/h
𝐹1,g1,𝑡	BFG consumption of equipment g1 in 𝑡 time point	m^3/h
𝐹2,g2,𝑡	COG consumption of equipment g2 in 𝑡 time point	m^3/h
𝐹3,g3,𝑡	LDG consumption of equipment g3 in 𝑡 time point	m^3/h
𝑄1,S1,𝑡	S1 steam production quantity of equipment S1 in 𝑡 time	𝑡/h
𝑄2,S2,𝑡	S2 steam production quantity of equipment S2 in 𝑡 time	𝑡/h
𝑄3,S3,𝑡	S3 steam production quantity of equipment S3 in 𝑡 time	𝑡/h
𝐹^Gas𝑖,𝑡	Emission capacity of 𝑖 gas in 𝑡 time point	m^3/h