This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

System Head Curve IS NEGATIVE IN ALL PROJECTS

Dear ;
In all water projects using watercad or watergems, the system head curve gives negative value which is not correct at all. I attached one project for your review. I appreciate if you can check the system head curve for the attached project.
Thanks in advance 
Sayed Ali
Saudi Consulting Services
New folder.rar
Parents
  • I agree with Mohamad.

    The problem is that you are pumping into a dead end system with fixed demands. If the flow is fixed, you can't get a curve. In order to get this to work, you need to have storage on both sides of the pump or model the demands as emitters or pressure dependent.

    I've attached a journal paper we did a few years ago explaining this.

Reply
  • I agree with Mohamad.

    The problem is that you are pumping into a dead end system with fixed demands. If the flow is fixed, you can't get a curve. In order to get this to work, you need to have storage on both sides of the pump or model the demands as emitters or pressure dependent.

    I've attached a journal paper we did a few years ago explaining this.

Children