Title:
METHOD OF OPERATING OPEN TYPE COOLING TOWER IN ICING IN FREE COOLING, AND OPEN TYPE COOLING TOWER USED THEREFOR
Document Type and Number:
Japanese Patent JP3934024
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To effectively conduct cooling even under the condition where icing is generated to some extents in a packed plate in a cooling tower, so as to provide a desired output temperature of circulated cooling water, using the open type cooling tower at an outside-air wet-bulb temperature near to an ice point or less.
SOLUTION: A water spray amount is set in response to the outside-air wet-bulb temperature, and rotation of a blower 25 is switched to a reverse direction when the output temperature of the circulated cooling water is elevated to reach to the first target value. When the output temperature of the circulated cooling water starts elevation to reach to the second target value after the output temperature of the circulated cooling water goes down abruptly, during the reverse directional operation of the blower 25, the rotation of the blower 25 is switched to a normal-directional operation. The output temperature of the circulated cooling water goes down abruptly thereafter to reach to a set value. The reverse operation and the normal operation of the blower 25 are repeated as one cycle in every time when a temperature of the circulated cooling water is elevated again in accompaniment to the icing in the packed plate 11 to make the output temperature of the circulated cooling water reach to the first target value, and the output temperature of the circulated cooling water is thereby maintained at the set value or around it.
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Inventors:
Ryo Tsukada
Fujisawa Isao
Kurosawa Miyoshi
Shin Hashimoto
Kazutaka Torii
Shigejiro Komiya
Fumio Numata
Yuji Kikuchi
Kunichika Shigenobu
Fujisawa Isao
Kurosawa Miyoshi
Shin Hashimoto
Kazutaka Torii
Shigejiro Komiya
Fumio Numata
Yuji Kikuchi
Kunichika Shigenobu
Application Number:
JP2002300252A
Publication Date:
June 20, 2007
Filing Date:
October 15, 2002
Export Citation:
Assignee:
EBARA Shinwa Co., Ltd.
Hokkaido Gas Co., Ltd.
Nippon Design Co., Ltd.
Shinryo Corporation
Takasago Thermal Engineering Co., Ltd.
Shin Nippon Air Conditioning Co., Ltd.
Hokkaido Gas Co., Ltd.
Nippon Design Co., Ltd.
Shinryo Corporation
Takasago Thermal Engineering Co., Ltd.
Shin Nippon Air Conditioning Co., Ltd.
International Classes:
F28F27/00; (IPC1-7): F28F27/00
Domestic Patent References:
| JP7218184A | ||||
| JP63070039A | ||||
| JP4148166A | ||||
| JP64049893A |
Attorney, Agent or Firm:
Masakuni Yamada
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