ENGG 2230 Lecture 18: Matching Pumps to System Characteristics

• School: University of Guelph
• Department: Engineering
• Course: ENGG 2230
• Professor: Bill Van Heyst

Document Summary

System head must be matched by the pump head (cid:858)v(cid:859) is proportio(cid:374)al to the flo(cid:449) rate (cid:858)q(cid:859) Assume that the change in pressure is in the. Plot and on a graph with h as the y-axis and q as the x-axis: =(cid:1853)+(cid:1854)(cid:2870) And intersect at some point: the intersection defines the operational point of the two systems, want the intersection to be the best efficiency point. For pumps that provide the right head but not enough flow rate (q), can combine two or more pumps in parallel sharing the same suction and inlet conditions. Good solution for systems that have a varying flow rate, one pump is used for low flo(cid:449) (cid:272)o(cid:374)ditio(cid:374)s (cid:449)hile the other pu(cid:373)p ki(cid:272)ks i(cid:374) o(cid:374)(cid:272)e the (cid:858)q(cid:859) de(cid:373)a(cid:374)d i(cid:374)(cid:272)reases. For pu(cid:373)ps that pro(cid:448)ide the right dis(cid:272)harge or (cid:858)q(cid:859) (cid:271)ut too little head, a(cid:374)other pu(cid:373)p can be added in series in order to solve the problem.