What is the meaning of lbm/min/KW
What is the meaning of lbm/min/KW
(OP)
I have a question? I'm working on a proposal for an aircraft product and the manufacturer says they can supply a air flow rate of XX Lbm/min/KW. Why is there a KW included with this number. I thought that it was just lbm/min. They are only supplying the air.
Thanks.
Gabe
Thanks.
Gabe





RE: What is the meaning of lbm/min/KW
Possible guesses:
Air flow is variable, as a function of some load measured in KW.
Power consumtion of the device that provides the air varies with the flow.
RE: What is the meaning of lbm/min/KW
RE: What is the meaning of lbm/min/KW
RE: What is the meaning of lbm/min/KW
RE: What is the meaning of lbm/min/KW
Cooling effect could be measured in KW, and assuming that we are dealing with sensible heat only, would be proportional to mass flow rate and a temperature difference.
RE: What is the meaning of lbm/min/KW
1. Will provide XX Lb/min of air for each kw of power it is supplied.
2. Will provide XX lb/min of air for each kw of power or heat in the device into which the air is being put, presumably for cooling.
Alternatively why do need more air if cooling air is already being supplied?
More detail and information is required to resolve this issue.
Regards
Dave
RE: What is the meaning of lbm/min/KW
RE: What is the meaning of lbm/min/KW
An inefficient fan obviously uses a lot of power to generate the required airflow. In Avionics, I guess that this is just as important because every kW used reduces the overall aircraft fuel consumption/range etc
Friar Tuck of Sherwood
RE: What is the meaning of lbm/min/KW
RE: What is the meaning of lbm/min/KW
RE: What is the meaning of lbm/min/KW
that is indeed a stupid question. What would we have to talk about if we all did things like ask people what they mean?
However it sounds like a bid evaluation, and evaluators can look bad if they ask bidders stupid questions. I do it all the time.
The lb/min/kW sounds like a generic requirement from a vendor who sells gear that needs air supplied by others. Each kW that their gear gear emits or generates requires X lb/min. I suspect the air supply vendor has cut and pasted the demand. Who knows? Maybe its part of a larger system and the vendor hasnt worked it out yet. Perhaps it is the power required for their unit. Maybe it is cooling capacity.
In this case, I would ask the stupid question.
Cheers
Steve
RE: What is the meaning of lbm/min/KW
Gabe