摘要:
Air-to-air heat exchanger for ventilation systems with two countercurrent air flows disposed inside a cylindrical housing, a first air flow circulating inside the heat exchanger inside closed pipes, whilst the second air flow is in spaces between the pipes and cylindrical housing, and a fan moving the countercurrent air flows and disposed at one end of the cylindrical housing, with the fan including concentric inner and outer rings separated by a wall for moving air in opposite directions, a bunch of straight, parallel pipes whose end elements at the fan side are tightly gathered together, in the end of a cylindrical wall and, on the opposite side, in the end of a cylindrical pipe fitting, and between end elements, taper into middle sections between which are spaces, and a sleeve lining the inner wall of the housing at the middle sections and constricts the inner diameter of the housing.
摘要:
A heat exchanger includes: a heat exchange section through which a compressed gas flows; an upstream header section that is provided on an upstream side of the heat exchange section and communicates with the heat exchange section; a downstream header section that is provided on an downstream side of the heat exchange section and communicates with the heat exchange section; a gas inlet pipe that is connected to a wall surface of the upstream header section; and a gas outlet pipe that is connected to a wall surface of the downstream header section. A filter-cum-sound absorbing material of a porous material is mounted on an inner wall surface of at least one of the upstream header section and the downstream header section. The inner wall surface faces the heat exchange section.
摘要:
An evaporator (168) in a vapor compression system (14) (168) includes a shell (76), a first tube bundle (78); a hood (86); a distributor (80); a first supply line (142); a second supply line (144); a valve (122) positioned in the second supply line (144); and a sensor (150). The distributor (80) is positioned above the first tube bundle (78). The hood (88) covers the first tube bundle (78). The first supply line (142) is connected to the distributor (80) and an end of the second supply line (144) is positioned near the hood (88). The sensor (150) is configured and positioned to sense a level of liquid refrigerant (82) in the shell. The valve (122) regulates flow in the second supply line in response to the level of liquid refrigerant (82) from the sensor (150).
摘要:
An apparatus in a steam generator that employs tube support plates within a shroud that is in turn disposed within a shell. The tube support plates are made of a material having a coefficient of thermal expansion lower than that of the shroud. The tube support plates are aligned during fabrication with minimal clearances between components. Using a tube support displacement system, a controlled misalignment is imposed on one or more tube support plates as the steam generator heats up. The tube support plate displacement system has only two parts, a spring bar and a push rod, that are internal to the steam generator shell and threadably engaged, thereby minimizing the potential of loose parts. The tube support plate displacement system can be used to provide controlled misalignments on one or more tube support plates, with one or more apparatus being provided for any individual tube support plate.
摘要:
A heat exchanger using Exhaust Gas Recirculation (EGR) gas may include a cooling water line including cooling water flowing therein, an EGR line including EGR gas flowing therein and directly exchange heat between the EGR gas and the cooling water in the cooling water line, and an oil line including oil flowing therein and indirectly exchange heat between the oil and the EGR gas through the cooling water while directly exchanging heat between the oil and the cooling water in the cooling water line.
摘要:
A cooler for cooling a gaseous medium includes: a housing; a heat exchanger in the housing, the heat exchanger having an inlet portion at a flow inlet side of the heat exchanger, an outlet portion arranged at a flow outlet side of the heat exchanger, and tubes through which a coolant flows and about which gaseous medium to be cooled circulates; at least one inflow, through which the medium to be cooled can be introduced into the housing and fed to the inlet portion of the heat exchanger; at least one drain, through which cooled medium originating from the outlet portion of the heat exchanger can be discharged out of the housing; and at least one perforated plate-like flow homogenization element positioned in the housing at a position upstream of the inlet portion of the heat exchanger, seen in a flow direction of the medium to be cooled.
摘要:
Methods and systems to manage refrigerant flow inside a shell and tube heat exchanger, such as a condenser, to reduce inundation effect are provided. A method of managing refrigerant flow may include collecting at least a portion the refrigerant in the liquid state and directing the collected refrigerant in the liquid state toward an end of an internal space of the condenser. The method may further include directing the refrigerant in the liquid form toward a subcooling section. The method may also include directing the collected in the liquid state toward a refrigerant outlet located at proximately a middle section of a length of the condenser through the subcooling section. The condenser may have one or more separation/collection pans positioned within heat transfer tubes to collect and direct the refrigerant in the liquid form. A two-stage refrigerant distributor is also disclosed.
摘要:
The invention relates to a method for controlling a temperature distribution in a heat exchanger, in which an actual temperature distribution in the heat exchanger is measured by means of at least one optical waveguide arranged in the heat exchanger, in particular in the form of a glass fibre, light being launched into the optical waveguide and light that is scattered in the optical waveguide being evaluated for determining the actual temperature distribution, and at least one flow of a fluid medium that is carried in the heat exchanger being controlled in such a way that the actual temperature distribution is made to approximate a pre-defined target temperature distribution. The invention also relates to a device for carrying out a method for controlling a temperature distribution in a heat exchanger.
摘要:
A cooling system integrating a plurality of evaporative chillers, which each cool water to below ambient wet bulb temperature. In an air-to-air heat exchanger of each chiller, the incoming airstream used to evaporate water from the water stream is first cooled indirectly using the cooled air that is exhausted from a saturator of an adjacent chiller or subunit. By pre-chilling the air without adding moisture, each of the chillers of the cooling system is able to achieve water temperatures below the ambient wet bulb temperature. The system integrates or “daisy chains” multiple sub-wet bulb evaporative chillers or subunits such that the cool air output from one subunit is used to pre-cool the incoming air of another neighboring unit. To this end, adjacent units have their heat exchangers fluidically connected together (e.g., air flow output from each saturator is passed as cool return air through channels of an adjacent heat exchanger).
摘要:
The present invention is a device for heat exchange particularly suitable for cooling recirculated gas in EGR (Exhaust Gas Recirculation) systems, with a constructive configuration incorporating the heat exchanger together with a bypass conduit and a bypass valve, where most of the parts forming said device allow manufacturing same in stamped sheet metal, thereby reducing manufacturing costs.