Energy Efficiency in the Minerals Industry by Kwame Awuah-Offei

Author:Kwame Awuah-Offei
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

The authors also conducted a sensitivity analysis of the model for a 65t capacity dump truck. The sensitivity index [7] is defined in Eq. 9.49 as the ratio of change in SFC computed to the expected change in input base value.

(9.49)

A positive sensitivity index indicates that an increase in base value increases the SFC and vice versa. A negative sensitivity index indicates that an increase in base value decreases the SFC and vice versa. The sensitivity analysis of the SFC for a 65t capacity dump truck operating in down gradient and up gradient mines is analyzed by Sahoo et al. [7]. An increase in the base value of the payload (65t) by 5% decreases SFC by 2.7% whereas the same decrease in base value of payload increases SFC by 3.18% for down gradient mines. The SFC decreases by 2.83% with an increase in base value of the payload by 5% for up gradient mine.

The SFC of the dump truck decreases with increasing payload so long as the rated payload is not exceeded significantly and the minimum SFC of 84.8 g/t is estimated at the maximum payload of 65t as shown in Fig. 9.4. The material handling rate of a dump truck increases with operating speed. However, the SFC also increases with speed and subsequently with handling rate. The SFC of the dump truck decreases with gradient for a down gradient (negative gradient) mine and vice versa for an up gradient (positive gradient) mine. The SFC of the haul trucks also varies linearly with haulage distance.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.