US-20260126251-A1 - GAS COOLER DESIGN METHOD

US20260126251A1US 20260126251 A1US20260126251 A1US 20260126251A1US-20260126251-A1

Abstract

A method of designing a gas cooler includes acquiring information on a condition of a gas flowing through a flow path in a shell main body and a condition of a cooling medium flowing through at least one pipe; setting a provisional arrangement condition of the at least one pipe when viewed from a second direction intersecting a first direction in which the gas flows in the flow path; and acquiring a relationship between an adhesion rate of condensed water of moisture contained in the gas to an outside surface of the at least one pipe and a decrease rate of an efficiency of heat exchange between the gas and the cooling medium on a basis of the acquired information on the condition of the gas, the acquired information on the condition of the cooling medium, and the set provisional arrangement condition.

Inventors

Hiroyuki Miyata
Kazutoshi Yokoo
Masahiro Hayashi

Assignees

MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION

Dates

Publication Date: 20260507
Application Date: 20231018
Priority Date: 20221020

Claims (6)

1 . A method of designing a gas cooler including a shell main body that is hollow and into which a gas containing moisture is fed from outside, a flow path-forming section that forms a flow path of the gas in the shell main body, and at least one pipe that is disposed passing through the flow path in the shell main body and through which a cooling medium flows, the method comprising: acquiring information on a condition of the gas flowing through the flow path in the shell main body and a condition of the cooling medium flowing through the at least one pipe; setting a provisional arrangement condition of the at least one pipe when viewed from a second direction intersecting a first direction in which the gas flows in the flow path; acquiring a relationship between an adhesion rate of condensed water of moisture contained in the gas to an outside surface of the at least one pipe and a decrease rate of an efficiency of heat exchange between the gas and the cooling medium on a basis of the acquired information on the condition of the gas, the acquired information on the condition of the cooling medium, and the set provisional arrangement condition; determining whether or not the relationship between the adhesion rate of the condensed water and the decrease rate satisfies a predetermined reference condition; and determining an arrangement of the at least one pipe on a basis of the provisional arrangement condition when the reference condition is satisfied as a result of the determining.
2 . The method of designing a gas cooler, according to claim 1 , wherein the relationship between the adhesion rate of the condensed water and the decrease rate is acquired as a function of a flow velocity of the gas.
3 . The method of designing a gas cooler, according to claim 1 , wherein the shell main body is formed in a tubular shape extending around an axis extending in the second direction, and in the setting of the provisional arrangement condition, an arrangement and the number of the at least one pipe when viewed from the second direction are set as the provisional arrangement condition.
4 . The method of designing a gas cooler, according to claim 3 , wherein the number of the at least one pipe arranged in a third direction intersecting the first direction and the second direction is smaller than the number of the at least one pipe arranged in the first direction.
5 . The method of designing a gas cooler, according to claim 3 , wherein in the setting of the provisional arrangement condition, a size of a flow path cross-sectional area of the flow path when viewed from the first direction is set as the provisional arrangement condition.
6 . The method of designing a gas cooler, according to claim 3 , wherein in the setting of the provisional arrangement condition, a size of a flow path cross-sectional area of the flow path when viewed from the second direction is set as the provisional arrangement condition.

Description

TECHNICAL FIELD The present disclosure relates to a gas cooler design method. Priority is claimed on Japanese Patent Application No. 2022-168437, filed Oct. 20, 2022, the content of which is incorporated herein by reference. BACKGROUND ART When a gas is compressed by a compressor, the temperature of the gas after the compression rises. In a multistage compressor or the like, when a gas after compression is fed to another compressor or the like at a following stage, a gas cooler for cooling the gas may be used in order to increase the compression efficiency of the gas in the compressor at the following stage. For example, Patent Document 1 discloses a gas cooler that is a cooler including a tubular housing and a heat exchanger disposed in the housing as a cooler. In this configuration, a gas flows into the housing from an inflow port formed in the housing. The gas flows within the housing around a plurality of pipes extending in an axial direction of the housing. A cooling medium (coolant) flows inside the pipes. The gas is cooled by heat exchange with the cooling medium via the pipes. CITATION LIST Patent Literature Patent Document 1: JP 2014-137219 A SUMMARY OF INVENTION Technical Problem In the above-described cooling device, when the gas contains moisture, the water contained in the gas condenses when the gas is cooled by heat exchange with the cooling medium. The condensed water may adhere to the outside surface of the pipes. A liquid film is formed on the outside surface of the pipes by the condensed water, a heat transfer area for performing heat exchange with the gas is reduced, and this leads to a decrease in efficiency of heat exchange of the gas in the heat exchanger. The present disclosure provides a gas cooler design method capable of suppressing a decrease in efficiency of heat exchange due to condensation of water contained in a gas. Solution to Problem The present disclosure provides a method of designing a gas cooler including a shell main body that is hollow and into which a gas containing moisture is fed from outside, a flow path-forming section that forms a flow path of the gas in the shell main body, and at least one pipe that is disposed passing through the flow path in the shell main body and through which a cooling medium flows, the method comprising: acquiring information on a condition of the gas flowing through the flow path in the shell main body and a condition of the cooling medium flowing through the at least one pipe; setting a provisional arrangement condition of the at least one pipe when viewed from a second direction intersecting a first direction in which the gas flows in the flow path; acquiring a relationship between an adhesion rate of condensed water of moisture contained in the gas to an outside surface of the at least one pipe and a decrease rate of an efficiency of heat exchange between the gas and the cooling medium on a basis of the acquired information on the condition of the gas, the acquired information on the condition of the cooling medium, and the set provisional arrangement condition; determining whether or not the relationship between the adhesion rate of the condensed water and the decrease rate satisfies a predetermined reference condition; and determining an arrangement of the at least one pipe on a basis of the provisional arrangement condition when the reference condition is satisfied as a result of the determining. Advantageous Effects of Invention According to the gas cooler design method of the present disclosure, it is possible to suppress a decrease in efficiency of heat exchange due to condensation of water contained in a gas. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 illustrates a schematic configuration of a compressor system including a gas cooler designed by a gas cooler design method according to an embodiment of the present disclosure. FIG. 2 is a perspective view of the gas cooler. FIG. 3 is a cross-sectional view of the gas cooler as viewed from the axial direction at a portion of an inlet nozzle. FIG. 4 is a flowchart illustrating a procedure of the gas cooler design method according to the embodiment of the present disclosure. FIG. 5 indicates an example of a function of a pipe group passage flow velocity, indicating the relationship between the flow velocity of a gas and the decrease amount of the efficiency of heat exchange of the gas. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for implementing a gas cooler design method according to the present disclosure will be described with reference to the accompanying drawings. However, the present disclosure is not limited only to these embodiments. (Configuration of Compressor System) As illustrated in FIG. 1, a gas cooler 1 designed by the gas cooler design method according to the present disclosure is disposed as part of a compressor system 8. The compressor system 8 includes a plurality of compressors 9 connected in series and the gas cooler 1. The plurality of compressors 9 are conn