Method for calculating and selecting minimum specific energy consumption working point of dredger

Table 1. Sand gradations for the calculation case
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Table 1. Sand gradations for the calculation case
粒级粒径/mm
d₁₀ 0.211
d₃₀ 0.280
d₅₀ 0.372
d₇₀ 0.500
d₉₀ 0.960

Table 2. Comparison of energy consumption before and after optimization

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Table 2. Comparison of energy consumption before and after optimization

	参数	优化前		优化后
	参数	三泵	两泵	三泵
水下泵	功率/kW	1 489	1 631	1 596
	转速/(r·min⁻¹)	292	319	312
	效率/%	85.8	84.1	83.9
1号舱内泵	功率/kW	3 425	3 145	3 224
	转速/(r·min⁻¹)	304	325	325
	效率/%	85.5	84.7	84.2
2号舱内泵	功率/kW	3 447		611
	转速/(r·min⁻¹)	233		117
	效率/%	80.9		82.3
总计	排压/kPa	2 091	1 573	1 849
	功率/kW	8 361	4 776	5 431
	工作点流量/(m³·s⁻¹)	3.342	2.315	2.464
	产量/(m³·h⁻¹)	4 116	2 480	3 025
	单方能耗/(kW·h·m⁻³)	2.028	1.926	1.789

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Mingzhi LI, Zhengjun YANG, Yanping HE, Hongsheng ZHANG, Rongbin TONG, Shuyang ZHANG. Method for calculating and selecting minimum specific energy consumption working point of dredger[J]. Chinese Journal of Ship Research, 2024, 19(5): 238

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