Volume : 2, Issue : 6, June - 2013

Noise Reduction of 3000 Rpm Diesel Genset through Design Optimization of Canopy

Amit Kumar Gupta, Dr. Ashesh Tiwari , Praveen Kumar Jain

Abstract :

Diesel generator sets have now become basic need of modern world and every sector requires Gensets either for continuous use or for power back–up solution. Diesel Gensets specifically runs either at 1500 rpm or 3000 rpm to maintain a electrical frequency of 50 Hz. Severe noise issues are associated with operation of Diesel Generator (DG) sets used in hospitals, shopping malls, offices and residential buildings, if not canopised properly. Noise levels become more significant when Diesel Engines equipped in Genset runs at 3000 rpm. In present study, passenger car automotive diesel engine was converted for 30 kVA Genset application by using 3000 rpm constant speed fuel injection pump. Entire dynamics of Engine changes due to higher rpm leading to high noise levels. Central Pollution Control Board (CPCB) has implemented a regulation for every Diesel Genset to strictly adhere noise levels of below 75 dB inorder to use the same commercially. Objective of the study was to design and optimize canopy for DG set to reduce noise levels inorder to comply CPCB norms along with adequate cooling requirements. Detailed evaluation of sub–systems was carried out to calculate insertion loss and identify predominant noise generating sources. Design of Experiments approach was used for canopy dimensions, selection of radiator, cooling fan, acoustic material and louvers. Validation testing was done on modified prototype canopy to assess desired noise level and cooling requirements. Adequate cooling and significant reduction in noise level of 24.6 dB was achieved in this study.