US 12,405,592 B2
Plant monitoring method using exergy efficiency value
Jung Won Park, Seoul (KR); Jung June Lee, Incheon (KR); and Yeong Hyeok Kim, Seoul (KR)
Assigned to DOOSAN ENERBILITY CO., LTD., Changwon (KR)
Filed by DOOSAN ENERBILITY CO., LTD., Changwon-si (KR)
Filed on Aug. 27, 2019, as Appl. No. 16/553,164.
Claims priority of application No. 10-2018-0105944 (KR), filed on Sep. 5, 2018.
Prior Publication US 2020/0073364 A1, Mar. 5, 2020
Int. Cl. G05B 19/4063 (2006.01); G05B 23/02 (2006.01); G05B 13/02 (2006.01)
CPC G05B 19/4063 (2013.01) [G05B 23/0283 (2013.01); G05B 13/0205 (2013.01); G05B 23/0221 (2013.01); G05B 23/0235 (2013.01); G05B 2219/39407 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of monitoring an ultra filtration/reverse-osmosis (UF/RO) water plant in which two or more UF/RO membranes are provided, the method comprising:
detecting, repeatedly, exergy data associated with chemical exergy and physical exergy of each UF/RO membrane, wherein the exergy data is averaged over a predetermined period of time and the predetermined period of time is determined according to a temperature, humidity, precipitation, wind speed, and season in an area in which the two or more UF/RO membranes are installed;
obtaining a chemical exergy value and a physical exergy value of each UF/RO membrane on the basis of the exergy data;
calculating an exergy efficiency value of each UF/RO membrane on the basis of the exergy data, wherein the exergy efficiency value of each UF/RO membrane is expressed in terms of a value within a range of 0 to 1, a value within a range of 0 to 10, or a value within a range of 0 to 100;
identifying an inefficient UF/RO membrane that needs to be improved in efficiency on the basis of data obtained through the calculating of the exergy efficiency value, wherein the determining of the inefficient UF/RO membrane comprises:
detecting the inefficient UF/RO membrane by checking if the exergy efficiency value of each UF/RO membrane is out of a predetermined range,
checking a maintenance priority of the two or more UF/RO membranes, and
ordering the inefficient UF/RO membrane according to the maintenance priority;
calculating a maintenance time at which the efficiency of the inefficient UF/RO membrane is expected to be lower than a predetermined efficiency using an operation trend curve derived on the basis of the exergy efficiency value; and
in response to determining of the maintenance time replacing the inefficient UF/RO membrane.