Excellent comments! I'm going to assume that the motor hasn't lost any efficiency. Back when the motors were installed in 1972 I think they were about 90% efficient. I'll just keep this value. Although I could just as easily enter 85% in my excel sheet and see what happens...uh oh...can of...
thanks for the repsonses everyone. For my cost analysis I'll just assume that the motor efficiciency has not changed. This will be the more conservative approach anyway.
Thanks again!
-Luke
Thanks electricpete,
I was hoping to get an idea about how much the motor efficiency might fall off. I was hoping someone has read a whitepaper or other article stating that a motor will lose such and such efficiency per year...
I know there are a lot of factors that could degrade the...
Hello all,
I'm doing an energy cost analysis for a hatchery that uses multiple large (100-150 hp) pumps for the process flows. My question is this:
Can anyone tell me how much the efficiency of a motor decreases over time? These motors were installed in 1972. I figure the pump efficiency has...
I don't really need any specific values, I just wanted to get a rough idea so in the future is someone tells me a VFD for a 10 hp motor will cost $10,000, I'll have an idea that something is fishy...
Golestan,
Seems fishy to me. I think USGBC contracts the testing out to various organizations around the country and as far as I know there are no options for an on-line non-proxy test...
