	US 12,332,002 B2
	Circulating cooling water treatment method and cooling performance
Takanori Yoshino, Tokyo (JP); Takashi Kikkawa, Tokyo (JP); Kazuhisa Fujita, Tokyo (JP); Natsumi Taniyama, Tokyo (JP); and Marina Yanagida, Tokyo (JP)
Assigned to KURITA WATER INDUSTRIES LTD., Tokyo (JP)
Appl. No. 18/031,008
Filed by KURITA WATER INDUSTRIES LTD., Tokyo (JP)
PCT Filed Oct. 6, 2021, PCT No. PCT/JP2021/036898 § 371(c)(1), (2) Date Apr. 10, 2023, PCT Pub. No. WO2022/080198, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 2020-172321 (JP), filed on Oct. 13, 2020.
Prior Publication US 2023/0375291 A1, Nov. 23, 2023
Int. Cl. F28F 23/00 (2006.01); C09K 5/20 (2006.01); F28F 25/00 (2006.01)

CPC F28F 23/00 (2013.01) [C09K 5/20 (2013.01); F28F 2025/005 (2013.01)]

12 Claims

1. A method for improving cooling performance of a cooling tower in a circulating cooling water system having the cooling tower, comprising:

measuring a dynamic contact angle and a bubble bulkiness of cooling water;

controlling an amount of an agent to be added to the cooling water by determining whether the cooling water satisfies following conditions:

(a) the dynamic contact angle of 55° or less; and

(b) the bubble bulkiness of 250 mL or less, wherein the agent comprising a surfactant; and

adjusting and adding the agent to the cooling water in the circulating cooling water system by increasing the amount of the agent when the measured dynamic contact angle exceeds 55° and decreasing the amount of the agent when the measured bubble bulkiness exceeds 250 mL.