- #1
Aledrus
- 11
- 0
I need some basic help as someone who has never done this before and have little understanding of what's going on:
Suppose I have steam with mass flow rate of W [kg/s] at 100C and 1 bar going to a heat exchanger (secondary side at 30C, 5 bar, 5 kg/s).
First Question)
This steam should condense to about 30C right? What is its pressure? Is it still at 1 bar or at saturated P (T=30C) which is 0.042 bar?
(on a sidenote, how would I calculate what the properties of the fluid after the condenser would be like? Is there a straight forward way other than going through time steps?)
Second Question)
If the fluid at the outlet of the condenser is going to be about 30C at 0.042bar, I would need a pump to get the liquid back to 1 bar right? How would I propose the specs of such a pump?
i) Rated Pump Rotational Velocity [rad/s] : does it matter what I write here?
ii) Rated Pump Flow [m3/s]: do I convert the W [kg/s] into volumetric flow rate here?
iii) Rated Pump Torque : could I just arbitrarily use any number I find?
iv) Rated Pump Motor Torque : also, could I just use any number I find on any pump?
v) Rated Head : Now I think this is what's important. If 10m of head is equivalent to about a rise of 1 bar, would I need to specify a Rated Head of 9.58m?I understand that this pump may not exist at all in the real world.. but I would like to understand some of these parameters, and decide which real world pump would most closely match what I want to use.
There aren't many pump tutorials around.
Thanks everyone, I realize that this isn't very helpful question and it may be not a very smart question. But I would like to learn.
Best regards
Suppose I have steam with mass flow rate of W [kg/s] at 100C and 1 bar going to a heat exchanger (secondary side at 30C, 5 bar, 5 kg/s).
First Question)
This steam should condense to about 30C right? What is its pressure? Is it still at 1 bar or at saturated P (T=30C) which is 0.042 bar?
(on a sidenote, how would I calculate what the properties of the fluid after the condenser would be like? Is there a straight forward way other than going through time steps?)
Second Question)
If the fluid at the outlet of the condenser is going to be about 30C at 0.042bar, I would need a pump to get the liquid back to 1 bar right? How would I propose the specs of such a pump?
i) Rated Pump Rotational Velocity [rad/s] : does it matter what I write here?
ii) Rated Pump Flow [m3/s]: do I convert the W [kg/s] into volumetric flow rate here?
iii) Rated Pump Torque : could I just arbitrarily use any number I find?
iv) Rated Pump Motor Torque : also, could I just use any number I find on any pump?
v) Rated Head : Now I think this is what's important. If 10m of head is equivalent to about a rise of 1 bar, would I need to specify a Rated Head of 9.58m?I understand that this pump may not exist at all in the real world.. but I would like to understand some of these parameters, and decide which real world pump would most closely match what I want to use.
There aren't many pump tutorials around.
Thanks everyone, I realize that this isn't very helpful question and it may be not a very smart question. But I would like to learn.
Best regards