Yes, the test was performed without fans ducting. Actually as rightly pointed out by everyone fans without ducting were of no use. I switched off the fan after sometime, and it made nearly no impact on the temperatures.
Test was performed for about 2 hrs, and yes temperatures were stabilized...
Today we have successfully test run the generator without cooling fan and with above arrangements:
Max Power: 1.46 MW
Max winding temp: 70 deg celcius
Max Driven end bearing temp: 56 deg celcius
Max Non Driven end bearing temp: 45 deg celcius
Max vibration on generator bearing = 5 mm/sec
This is the arrangement prepared to cool the alternator in absence of cooling fan. The air pressure is 4~5kg/cm2 and air flow is 7~8 m/sec measured on driven end side of alternator. Please comment on this air pressure & air flow, will this be sufficient to cool the genset on load?? Ambient is...
An old crack has been found in the fan, which has dust ingress. This shows fan was damaged due to starting jerk which old crack couldn't bear. Fortunately no one was hurt in this incident.
The attached picture shows air sparger installed at non driven end of generator. It has 3 nozzles from which air will be supplied. Please comment for any observation.http://files.engineering.com/getfile.aspx?folder=39d4315f-ef44-4010-b2bf-8c23a9e8f16f&file=WhatsApp_Image_2016-12-20_at_20.37.49.jpeg
I am talking about alternator mounted fan and not engine radiator fan. This alternator fan got damaged during synchronization with a 10,000 KVA steam turbine generator. We are still in process of finding out exact cause of this damage. This is an old 1977 UNELEC generator and OEM parts are not...
Dear All Members,
We have been operating a Diesel Engine Driven Generator of following specs:
Generator:
Make: UNELEC France.
Rating:1900 KVA, 1520 KW, 174 Amps, 6.3KV
Diesel Engine:
Type / Model:240-V16-GS-PE-1977
MFG'R: SACM
Recently during startup of Generator after oil change, its cooling...
