Abstract: An LNG gas supply system for a ship is provided, comprising an LNG storage tank, wherein: the LNG storage tank is connected with a BOG pipeline for outputting evaporated gas of natural gas, a low-pressure LNG treatment pipeline, a high-pressure LNG treatment pipeline and an ethylene glycol-water heating pipeline, wherein: the BOG pipeline includes a first regulating valve and a first-stage compressor unit arranged sequentially along a gas flow direction; the low-pressure LNG treatment pipeline includes a second regulating valve, a first cold source of a multi-stream vaporizer, and a separator arranged sequentially along the gas flow direction; the high-pressure LNG treatment pipeline includes a third regulating valve, a high-pressure booster pump and a second cold source of the multi-stream vaporizer arranged sequentially along the gas flow direction; and the ethylene glycol-water heating pipeline includes a medium storage tank for storing ethylene glycol water.

Abstract: An LNG gas supply system for a ship is provided, comprising an LNG storage tank, wherein: the LNG storage tank is connected with a BOG pipeline for outputting evaporated gas of natural gas, a low-pressure LNG treatment pipeline, a high-pressure LNG treatment pipeline and an ethylene glycol-water heating pipeline, wherein: the BOG pipeline includes a first regulating valve and a first-stage compressor unit arranged sequentially along a gas flow direction; the low-pressure LNG treatment pipeline includes a second regulating valve, a first cold source of a multi-stream vaporizer, and a separator arranged sequentially along the gas flow direction; the high-pressure LNG treatment pipeline includes a third regulating valve, a high-pressure booster pump and a second cold source of the multi-stream vaporizer arranged sequentially along the gas flow direction; and the ethylene glycol-water heating pipeline includes a medium storage tank for storing ethylene glycol water.

Abstract: Disclosed are a fixed scroll and a scroll compressor. The fixed scroll comprises a fixed scroll end plate, a fixed scroll wrap, and a peripheral wall, wherein an air inlet is provided in the peripheral wall, the fixed scroll wrap comprises a starting end connected to the peripheral wall, an engagement position to be engaged with an orbiting scroll wrap, and a scroll section extending from the starting end to the engagement position; the fixed scroll further comprises a flow-guiding passage in fluid communication with the air inlet; the flow-guiding passage extends from the starting end and extends along at least part of the scroll section; the scroll section comprises a first side wall comprising a first section having a first center of curvature and a second section having a second center of curvature, which are respectively located on radially opposite sides of the first side wall.

Abstract: Disclosed are a fixed scroll and a scroll compressor. The fixed scroll comprises a fixed scroll end plate, a fixed scroll wrap, and a peripheral wall, wherein an air inlet is provided in the peripheral wall, the fixed scroll wrap comprises a starting end connected to the peripheral wall, an engagement position to be engaged with an orbiting scroll wrap, and a scroll section extending from the starting end to the engagement position; the fixed scroll further comprises a flow-guiding passage in fluid communication with the air inlet; the flow-guiding passage extends from the starting end and extends along at least part of the scroll section; the scroll section comprises a first side wall comprising a first section having a first center of curvature and a second section having a second center of curvature, which are respectively located on radially opposite sides of the first side wall.

Abstract: A damping apparatus for an exhaust valve in a compressor, an exhaust valve assembly having the damping apparatus, and a compressor using the exhaust valve assembly. The damping apparatus comprises a fixed body; the fixed body comprises an exhaust hole comprises an exhaust hole through which a compression cavity and an exhaust cavity are in fluid communication with each other; the exhaust hole comprises an inlet, an outlet, and an intermediate cavity provided between the inlet and the outlet and allowing the inlet and the outlet to be in fluid communication with each other; the intermediate cavity is configured to enable the backflow of the gas from the exhaust cavity to form a vortex in the intermediate cavity. The damping apparatus has advantages of reducing the force and frequency of impacts on an exhaust valve plate, and prolonging the service life of the valve plate.

Abstract: A damping apparatus for an exhaust valve in a compressor, an exhaust valve assembly having the damping apparatus, and a compressor using the exhaust valve assembly. The damping apparatus comprises a fixed body; the fixed body comprises an exhaust hole comprises an exhaust hole through which a compression cavity and an exhaust cavity are in fluid communication with each other; the exhaust hole comprises an inlet, an outlet, and an intermediate cavity provided between the inlet and the outlet and allowing the inlet and the outlet to be in fluid communication with each other; the intermediate cavity is configured to enable the backflow of the gas from the exhaust cavity to form a vortex in the intermediate cavity. The damping apparatus has advantages of reducing the force and frequency of impacts on an exhaust valve plate, and prolonging the service life of the valve plate.