Optimization Method for Twin-Tunnel Complementary Ventilation Design and Its Energy Saving Effect

Table 5

Comparation of two ventilation schemes in energy consumption.

		Original design[26]				Improved method [28]				Redesign
		Length; (m)	Volume; (m^3/s)	Thrust; (Pa)	Power; (kW)	Length; (m)	Volume; (m^3/s)	Thrust; (Pa)	Power; (kW)	Length; (m)	Volume; (m^3/s)	Thrust; (Pa)	Power; (kW)
Jet fan	1	3700	450	250.1	30×22	3700	480	306.9	30×27	3650	402	54.1	30×5
	2	100	232	6.76	0	100	305	11.68	0	100	223	0	0
	3	1900	450	183.8	30×14	1900	480	150.8	30×17	1950	460	283.5	30×24
	4	3700	450	269.7	30×22	3700	320	126.5	30×8	3650	337	166.0	30×14
	5	100	232	6.76	0	100	145	2.64	0	100	158	0	0
	6	1664	450	132.5	30×14	1664	320	92.9	30×6	1714	395	0	0
Axial fan	7	—	218	42	315	—	175	27.1	162.95	0	179	64.4	315
	8	—	218	42	315	—	175	27.1	162.95	0	237	0	0
Total		—	900	920.1	2790	—	800	731.3	2065.9	—	797	568.0	1605

Note: “Volume”, “Thrust” and “Power” indicate the air volume, required thrust and gross power, respectively. Integrated values for the jet fan power are based on a value of 30 kW for a single jet fan.