The control system expander
(57) Abstract:The system is designed to regulate turboexpanders. In this control system turboexpander the stop valve is made in the form of two valves, mutually exclusive permeable to gas in the separate discharge line. Bypass line to the turbo-expander has a regulatory body with the actuator and position sensor. Bypass line from the stop valve to the backbone of low pressure is located bypass valve with actuator and position sensor to provide the same throughput with the regulator. Moreover, the regulator and bypass valve can be made in the form of two valves with a single drive. This embodiment of the system will improve the reliability of gas when using turbo-expanders at gas distribution stations. 1 C.p. f-crystals, 2 Il. The present invention relates to the field of turbine construction, such as control systems of turboexpanders.Known regulating device turboexpander used as the upper stage engine when starting the gas turbine, where the regulating device controls Rascani coupling between walama steam and gas turbines, containing the supply of steam or gas to the turbine stop and control valves .The well-known scheme of the experimental setup the expander for power generation, where the regulation of the supply of gas to the expander and the pressure before and behind him is carried out by means of regulating valves .To maintain a user may need constant pressure gas pipelines of high pressure supplied to the customer, install a gas distribution station (GDS) (or gas control points (GCP)), where the gas pressure regulate by means of the pressure regulator. Can be installed on gas distribution stations and gas control points (in parallel) of turboexpanders (for example, to drive an electric generator or pump, and so on). Typically, regulators pressure distribution (and fracturing) have insufficient performance. Resulting in actuation of the locking member on the expander (for example, when an emergency stop) and the termination of the gas passes through the expander to the consumer regulators GDS are not able to quickly restore the desired pressure, and the consumer, may only temporarily, may be without gas, which, as a rule, neopost what's stations (and fracturing) with turboexpanders.The essential features of the invention are controlled electric or pneumatic control devices the stop valve, the regulator (for example, in the form of an inlet guide vane and the bypass valve, the stopper valve is made in the form of mechanically interconnected and permeable to gas in the separate discharge line two (single seat or dvuhnedelnik) valves so that when one valve is open the other is closed, a bypass line connecting the stop valve with a turboexpander, has a regulatory body with the actuator and the position sensor, and a bypass line connecting the stop valve to the main low pressure, is the bypass valve with actuator and position sensor, with the possibility of simultaneous provide the same throughput with the regulator, with the implementation of the regulatory body and the bypass valve in the form of two mechanically interconnected valves with a single drive and the same bandwidth.Distinctive features of the invention are executing a stop valve in the form of a mechanically linked to each other and the Dean valve is open, the second is closed, while the outlet line connecting the stop valve with a turboexpander, has a regulatory body with the actuator and the position sensor, and a bypass line connecting the stop valve with a line of low pressure is located bypass valve with actuator and position sensor, with the possibility of simultaneous provide the same throughput with the regulator, with the implementation of the regulatory body and the bypass valve in the form of two mechanically interconnected valves with a single drive and the same bandwidth.In Fig. 1 shows schematically one of the options management system expander; Fig. 2 - another option.Mainline high pressure to the gas station 1 is connected through a system of shut-off valves 2, line 3, valve 4 quick-acting stop valve 5, the outlet line 6 and the regulator 7 (for example, in the form of inlet guide vanes) with actuator 8 (e.g., electric or pneumatic) and the position sensor 9 with the expander 10, also related highway 11 and system shut-off valve 12 to the main low pressure, i.e., that is coupled to a line of low pressure, bypassing the expander 10, through a system of shut-off valves 2, line 3, valve 13 quick-acting stop valve 5, the discharge line 14, the bypass valve 15 with the actuator 16 (e.g., electric or pneumatic) and the position sensor 17, highway 11 and the system shut-off valve 12. To control the expander 10 is installed aggregate automation 18.The system works regulation turboexpander as follows. At the start of the expander 10 on command from the system power automation 18 valve 4 of the stopper valve 5 is opened and the gas is supplied to the regulator 7 and later in the expander 10. The expander 10 kicks in. The valve 13 in the stop valve 5 is closed at this, blocking the path of gas to the bypass valve 15, but the bypass valve 15 is opened at this time (although the gas flow through it there) on command from the system power automation 18 according to the signals of the position sensors 9 and 17, simultaneously tracking the position of the regulator 7. Meanwhile the capacity of the bypass valve 15 is equal to the bandwidth of the regulatory body 7. At an emergency stop of the expander 10, the valve 4 in the stop valve 5 will quickly block the gas flow high on the rim of the expander 10 through the bypass valve 15 (with throttling). As a result, the amount of gas (low pressure) supplied to the consumer, will not change when you stop expander 10, and possible small changes in the gas pressure will adjust the pressure regulators on gas distribution station. System motor-operated valves 4 and 12 is necessary for the correct and safe filling gas, start, stop turboexpander 10 and disconnect it from mains high and low pressures. In the case of performing the regulatory body 7 and the bypass valve 15 in the form of two mechanically interconnected valves (in one case) with a single actuator 8 (Fig. 2) works control system as described above (Fig. 1), only eases the task of providing the same bandwidth regulator 7 and the bypass valve 15 (not required position sensor 17 and the actuator 16 to the bypass valve 15 and tracking algorithm).In the turboexpander can be used up to 80% of the gas flow passing through the gas distribution station. 1. The control system expander installed on the gas station between lines of high and low pressure containing upravlyaema, characterized in that it contains a bypass valve and the stop valve is made in the form of mechanically interconnected and permeable to gas in the separate discharge line of the two valves so that when one valve is open the other is closed, while the outlet line connecting the stop valve with a turboexpander, has a regulatory body with the actuator and the position sensor, and a bypass line connecting the stop valve with a line of low pressure is located bypass valve with actuator and position sensor, with the possibility of simultaneous provide the same throughput with the regulatory body.2. The system under item 1, characterized in that the regulator and bypass valve consists of two mechanically interconnected valves with a single drive and the same bandwidth.
FIELD: cooling engineering.
SUBSTANCE: device comprises two temperature gauges, unit for comparing temperatures, unit for generating alarm signal on wet stroke, converters for converting signals from temperature gauges into the alternating signals, frequency synchronizer, amplifier, and protecting relay. The first temperature gauge is set in the line for supplying coolant to the object to be cooled. The second temperature gauge is set at the inlet of the line for withdrawing the vapors of coolant from the object to be cooled to the bridge of switching of the compressors. The converters are synchronized in frequency. The unit for comparing temperatures is made of a transformer with magnetization and two primary windings which are connected in series with the signal converters. The secondary winding is connected with the input of the amplifier whose output is provided with the protecting relay.
EFFECT: enhanced reliability.
FIELD: mechanical engineering, particularly devices to prevent wet vapor ingress in cylinders of compressors used in gas-processing plants for pressure increase in natural gas pipelines.
SUBSTANCE: device comprises horizontal sucking pipe and emergency shutdown sensor. Low-frequency ultrasound generator is arranged inside horizontal sucking pipe. Ultra-violet radiation sensor is installed in lower part of horizontal sucking pipe and is spaced 0.1-1 m from low-frequency ultrasound generator.
EFFECT: increased operational reliability.
FIELD: conditioning system, particularly ones adapted for vehicle conditioning and provided with centrifugal compressors.
SUBSTANCE: cooling plant comprises closed loop with sealed centrifugal pump with built-in electric motor, as well as condenser with axial fan, thermostatic expansion valve and evaporator. Thermal phial of thermostatic expansion valve is installed at evaporator outlet. Bypass line with throttle is connected in parallel to thermostatic expansion valve. Object to be conditioned is communicated to evaporator through air loop provided with centrifugal fan. Throttle has locking valve and bellows-type pneumatic drive having control cavity communicated with thermal phial of thermostatic expansion valve.
EFFECT: simplified structure and increased operational reliability.
FIELD: refrigerating engineering.
SUBSTANCE: refrigerating plant comprises vessels and metallic pads that underlie the vessels and are connected to the pipeline through branch pipes. The pipeline is mounted with an inclination and is connected with the pressure-tight tank for collecting spilled ammonia. The tank is connected with the atmosphere through the pipeline and stop valve and is provided with air separator for removing air from its steam zone, branch pipes, and pipeline.
EFFECT: enhanced efficiency.
3 cl, 1 dwg
FIELD: lighting; heating.
SUBSTANCE: invention proposes a method for controlling operation of a refrigerator compressor whereby thawing is effected when the temperature inside the refrigerator reaches a predetermined thawing temperature. Refrigerating capacity of the compressor mounted inside the refrigerator is changed depending on the temperature inside the refrigerator by regulating the direction of rotation of the compressor. The refrigerating capacity of the compressor is increased by rotating the compressor in one direction and is decreased by rotating the compressor in another direction, this second direction being reverse to the first one. Prior to thawing the compressor is repeatedly rotated in the second direction and stopped until the predetermined thawing temperature is achieved inside the refrigerator. After thawing the compressor is rotated in the first direction until the predetermined temperature is achieved and in order to maintain this predetermined temperature the compressor is periodically stopped or rotated in the second direction. A device for controlling operation of a refrigerator compressor includes a microcomputer, a working frequency converter, a rotation signal generating unit and a unit for measuring temperature inside the refrigerator. The working range of the temperature measuring unit is predetermined depending on the compressor rotation direction.
EFFECT: reduced power consumption by a refrigerator; increased capacity and precise temperature control of the refrigerator.
FIELD: air conditioning.
SUBSTANCE: invention pertains to the technology of air conditioning. The air conditioner has a heat source device and a terminal device, joined by connection pipes for a coolant, in which there is exact determination of whether the contour of the coolant has the required amount of coolant or not. The conditioner can work, when switched in any of the normal working modes, in which the heat source device, consisting of a compressor and a lateral heat exchanger of the heat source device, is joined to terminal devices, consisting of lateral expansion valves and terminal lateral heat exchangers, using connection pipes. Each device is controlled depending on the work load of the terminal devices, or the working mode is determined by the quantity of the coolant, in which the terminal devices carry out cooling operations, and the running power of the compressor is regulated such that, the pressure during evaporation of terminal lateral heat exchangers is constant with control of lateral expansion valves such that, the degree of super heating on outlets openings of terminal lateral heat exchangers have a positive value.
EFFECT: accurate determination of whether the coolant contour has the required amount of coolant in a monofunctional conditioner.
12 cl, 10 dwg
SUBSTANCE: invention is referred to electric engineering and may be used for cooling devices. Cooling device freezes products without additional inducer due to compressor motor operation in cooling cycle at alternating speed rates from power supply voltage.
EFFECT: improvement of productivity by freezing.
4 cl, 7 dwg
SUBSTANCE: invention relates to cooling compartments, refrigerators with proper cooling compartments and methods of control. Super-cooling device contains storage compartments and super-cooling compartments. Storage compartments are supplied with cooled air from cooled air supply unit. Super-cooling compartment is inside storage compartment. Air-cooled super-cooling compartment cools down products. It consists of container and cover. Container forms free space for product storage. Cover is used for opening and closing container outlet. There are holes in cover for cooling air supply to and from super-cooling compartment. There is also a screen in cover to open and close holes. In addition, super-cooling plant contains temperature sensor inside super-cooling compartment and control unit.
EFFECT: development of refrigerator and control method, which may keep drinking compartment temperature at optimal levels and produce super-cooled drink in fast manner.
26 cl, 11 dwg
SUBSTANCE: present invention pertains to a cooling device. The cooling device has cooling circuit (9) comprising: i) compressor (2), executing the cooling cycle; ii) evaporator (3), absorbing heat energy of the medium being cooled; iii) condenser (4), transmitting heat energy to an external medium; iv) capillary pipe (5), allowing for expansion of the cooling agent coming out of condenser (4), and carrying the cooling agent to evaporator (3); v) valve (6) with electromagnetic control, controlling flow of the cooling agent and located between condenser (4) and capillary pipe (5); vi) bypass line (7), leveling pressure in the sucking and blowing parts of the compressor (2). The cooling circuit (9) also has: i) valve (16) electromagnetically controlled, which prevent reverse flow to evaporator (3) when compressor (2) is not working and which is in the sucking part of the compressor (2); ii) control mechanism (8), which delays opening of electromagnetically controlled valve (16) by a period, which runs from starting the compressor (2) until a limit value of torque is attained.
EFFECT: prevention of migration of cooling agent when the compressor is not working and easier start up of the compressor.
3 cl, 3 dwg
SUBSTANCE: method for operation of heat pump may be used in refrigerating equipment and in heat pump sets for heat and cold supply to consumer. Mentioned technical problems are solved by method of heat pump operation, which includes serially realised processes of working medium compression and expansion with its transition from compression chamber to expansion chamber and back with heat removal after compression process and heat supply after expansion process, at that compliance of pressure value in the end of expansion process to pressure value in the beginning of compression process is maintained by means of additional working medium supply to expansion chamber, in which expansion process is realised in at least two expansion chambers, and supply of additional working medium in expansion chambers is realised by means of its transfer directly from one expansion chamber to the other.
EFFECT: increased efficiency parametres of heat pump.