LIQUEFIED GAS COOLING APPARATUS
1 Assignment
0 Petitions
Accused Products
Abstract
A liquefied gas cooling apparatus including: a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit. The compressor is driven through an electric motor contained in a sealed housing together with a compressor mechanism.
7 Citations
24 Claims
-
1-12. -12. (canceled)
-
13. A liquefied gas cooling apparatus comprising:
-
a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit, the compressor comprising; a sealed housing; a compressor mechanism contained in the housing; and an electric motor contained in the housing together with the compressor mechanism, wherein the compressor is driven through the electric motor, the refrigeration unit is modularized into multiple refrigeration modules connected in parallel or series to the gas flow path to achieve needed cooling performance, the number of refrigeration modules to operate is controlled according to needed cooling performance dependent on variations in the flow rate of the liquefied gas and in the temperature of the liquefied gas flowing in, the performances of the refrigeration modules are adjustable by the respective inverters, a comparison is performed between an efficiency produced by adjusting the performance by controlling the number of modules to operate, and an efficiency produced by adjusting the performance by controlling the rotation speed of the compressor, and adjustment is performed by one of these with higher efficiency, and to select control of the number of refrigeration modules to operate or control of the rotation speed of the compressor, maintenance cost per operation time of the compressor calculated by dividing the cost of regular maintenance of the compressor by maintenance interval is added to electric power cost, and comparison and determination are then made. - View Dependent Claims (15)
-
-
14. A liquefied gas cooling apparatus comprising:
-
a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit, the compressor comprising; a sealed housing; a compressor mechanism contained in the housing; and an electric motor contained in the housing together with the compressor mechanism, wherein the compressor is driven through the electric motor, the refrigeration unit is modularized into multiple refrigeration modules connected in parallel or series to the gas flow path to achieve needed cooling performance, the number of refrigeration modules to operate is controlled according to needed cooling performance dependent on variations in the flow rate of the liquefied gas and in the temperature of the liquefied gas flowing in, the performances of the refrigeration modules are adjustable by the respective inverters, a comparison is performed between an efficiency produced by adjusting the performance by controlling the number of modules to operate, and an efficiency produced by adjusting the performance by controlling the rotation speed of the compressor, and adjustment is performed by one of these with higher efficiency, and the refrigeration modules except the modules during maintenance are subjected to optimization operation, and the number of modules to operate and which modules are to operate are determined such that a maximum number of modules that can be subjected to maintenance are concurrently subjected to maintenance, the maximum number being determined by resources of performance margin and maintenance personnel.
-
-
16. A liquefied gas cooling apparatus comprising:
-
a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit, the compressor comprising; a sealed housing; a compressor mechanism contained in the housing; and an electric motor contained in the housing together with the compressor mechanism, wherein the compressor is driven through the electric motor, the compressor is modularized into multiple compressor modules connected in parallel to the refrigerating cycle to achieve needed cooling performance, the number of compressor modules to operate is controlled according to needed cooling performance dependent on variations in the flow rate of the liquefied gas and in the temperature of the liquefied gas flowing in, the performances of the compressor modules are adjustable by the respective inverters, a comparison is performed between an efficiency produced by adjusting the performance by controlling the number of modules to operate, and an efficiency produced by adjusting the performance by controlling the rotation speed of the compressor, and adjustment is performed by one of these with higher efficiency, and to select control of the number of compressor modules to operate or control of the rotation speed of the compressor, maintenance cost per operation time of the compressor calculated by dividing the cost of regular maintenance of the compressor by maintenance interval is added to electric power cost, and comparison and determination are then made. - View Dependent Claims (18)
-
-
17. A liquefied gas cooling apparatus comprising:
-
a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit, the compressor comprising; a sealed housing; a compressor mechanism contained in the housing; and an electric motor contained in the housing together with the compressor mechanism, wherein the compressor is driven through the electric motor, the compressor is modularized into multiple compressor modules connected in parallel to the refrigerating cycle to achieve needed cooling performance, the number of compressor modules to operate is controlled according to needed cooling performance dependent on variations in the flow rate of the liquefied gas and in the temperature of the liquefied gas flowing in, the performances of the compressor modules are adjustable by the respective inverters, a comparison is performed between an efficiency produced by adjusting the performance by controlling the number of modules to operate, and an efficiency produced by adjusting the performance by controlling the rotation speed of the compressor, and adjustment is performed by one of these with higher efficiency, and the compressor modules except the modules during maintenance are subjected to optimization operation, and the number of modules to operate and which modules are to operate are determined such that a maximum number of modules that can be subjected to maintenance are concurrently subjected to maintenance, the maximum number being determined by resources of performance margin and maintenance personnel.
-
-
19. A liquefied gas cooling apparatus comprising:
-
a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit, the compressor comprising; a sealed housing; a compressor mechanism contained in the housing; and an electric motor contained in the housing together with the compressor mechanism, wherein the compressor is driven through the electric motor, the electric motor of the compressor is provided with a relay to a power feeding circuit therefor, and the relay is turned on/off according to the opening/closing of open/close valves for maintenance provided on inlet and outlet sides of the compressor. - View Dependent Claims (20, 21, 22, 23, 24)
-
Specification