A method of obtaining cold in turkological installed with air bleed from the compressor turbojet engine

 

The method relates to refrigeration. Set the temperature of air for cooling the turbine and the initial value of the pressure net pressure regulator. Measure the pressure of the air taken from the compressor of the engine, the temperature and pressure at the turbine inlet temperature and pressure for the turbine and the speed of its rotor. Determine the degree of pressure reduction turbine, the current value of a given frequency of rotation of the rotor and the optimal value of the given frequency of rotation of the rotor corresponds to the maximum efficiency of the turbine. If the current value of a given rotation frequency less than or more than the optimum values are given rotational speed, respectively reduce or increase the braking torque of the rotor. If it is impossible to achieve equality and optimal current values of frequency of rotation of the turbine rotor by influencing the braking device, then set the new value of the pressure for the network controller is lower than the initial value, while the new setpoint pressure is again measured and determine the parameters mentioned above and repeat the above sequence of processes starting from the measurement of pressure turbine rotor and equality defined and measured values of air temperature for the turbine. The use of the invention will improve the energy efficiency of getting cold. 5 C.p. f-crystals, 1 Il.

The invention relates to refrigeration and can be used in refrigeration systems, air conditioning systems and life support.

Known methods for producing cold in turbomolecular units, consisting of a cooling turbine, and a braking device mounted on the same shaft, which includes the process of expansion of compressed air in the refrigeration turbine with decreasing temperature and output mechanical power brake device to brake the turbocharger or blower (US 2618125 AND 18.11.52; EN 2188368 C1, 27.08.2002).

Known methods for producing cold in turbomolecular facilities, including compression of atmospheric air in the compressor and its cooling in air-to-air heat exchanger the air coming from the atmosphere, the expansion cooling turbine with decreasing temperature and output mechanical power brake device to brake the turbocharger or blower (US 4493195 AND 01.15.85; EN 2190814 C1, 10.10.2002).

A method of obtaining cold in Turkological installed with air bleed from the compressor turbojet engines is essor air network pressure regulator, cooling it in air-to-air heat exchanger to heat the purge air flowing from the atmosphere (environment) through the intake channel, the expansion of compressed air in the refrigeration turbine by lowering its temperature and efficiency of the mechanical energy of rotation of the rotor cooling turbine brake unit (brake turbocharger or blower) associated drive turbine rotor (Voronin, I., willow M. I. air Conditioning on aircraft. - M.: mechanical engineering 1965, S. 52-57).

However, the known method does not provide high efficiency for the cold, because in conditions of variable modes and changing environmental parameters typical turbojet engine (TRD), and, as a consequence, time-varying operating parameters of the refrigeration turbine and braking and deviation values of the operating parameters from the estimates, there is a significant decrease in efficiency of the turbine. To compensate for the reduced efficiency of the refrigeration turbine and due to this increase in air temperature for the turbine is above the preset level, it is necessary to increase the number of purge (cooling) of air through the air in what does the present invention is to develop a method, which provides high energy efficiency get cold in Turkological installation in a wide range of variable operating modes, in particular the reduction of fuel consumption TRD spent on the production of cold.

This technical result (energy efficiency) is achieved by the fact that in the known method of obtaining cold in Turkological installed with air bleed from the compressor turbojet engine by compressing atmospheric air in the compressor of the engine, control the pressure tapped from the compressor air network pressure regulator, cooling it in air-to-air heat exchanger vent air coming from the atmosphere, the subsequent expansion of the compressed air in the refrigeration turbine by lowering its temperature and output mechanical power brake device is kinematically associated with the turbine rotor, according to the invention set the temperature for the turbine and the initial value of the pressure net pressure regulator, measure the pressure of the air taken from the compressor of the engine, the temperature and pressure at the turbine inlet temperature and the turbine back pressure and frequency rotations is Oia rotor and the optimal value of the given frequency of rotation of the rotor, corresponds to the maximum efficiency of the turbine. If the current value of a given rotation frequency less than the optimal values are given rotational speed, while decreasing the braking torque of the rotor. If the current value of a given speed more than the optimum value, then the braking torque of the rotor is increased. Thus the braking torque of the rotor change by influencing the braking device until the equality of the optimal and the current values of frequency of rotation of the turbine rotor. If the measured temperature value of the air for the turbine is less than the specified, then reduce the amount of purge air, until equality is defined and measured temperature values. If the measured value of the air temperature for the turbine exceeds the specified value, then increase the amount of purge air, until equality is defined and measured temperature values. If it is impossible to achieve equality and optimal current values of frequency of rotation of the turbine rotor by influencing the braking device, then set the new value of the pressure for the network controller is lower than the initial value, with a new set of totora, determine the degree of pressure reduction turbine, the current value of a given frequency of rotation of the rotor and the optimal value of the given frequency of rotation of the rotor corresponds to the maximum efficiency of the refrigeration turbine. If the current value of a given rotation frequency less than the optimal values are given rotational speed, while decreasing the braking torque of the rotor. If the current value of a given speed more than the optimum value, then the braking torque of the rotor is increased and the braking torque of the rotor change by influencing the braking device until the equality of the optimal and the current values of frequency of rotation of the turbine rotor. Then, if the measured temperature value of the air for cooling the turbine is less than the specified, then reduce the amount of purge air, until equality is defined and measured temperature values. If the measured value of the air temperature for the turbine exceeds the specified value, then increase the amount of purge air, until equality is defined and measured temperature values. If again it is impossible to achieve equality and optimal current values of Chasseneuil regulator lower than the specified previous value, and repeat the above sequence of processes starting from the measurement of the pressure at the turbine inlet, temperature and pressure for the turbine and the speed of its rotor, until the equality of the optimal and the current values of frequency of rotation of the turbine rotor and equality defined and measured values of air temperature for the turbine.

In addition, provided that the amount of purge air change by reducing or increasing the degree of throttling of the flow of the purge air enters an air-to-air heat exchanger.

Provided that the amount of purge air change by reducing or increasing the degree of throttling of the flow of purge air out air-to-air heat exchanger.

Recommended as a braking device to use a hydraulic pump, while the braking torque of the rotor change, reducing or increasing the degree of throttling of the working fluid on the discharge side of the hydraulic pump.

It is advisable as a braking device to use the turbocharger, while the braking torque of the rotor change, reducing or increasing the resistance is istwa to use the generator, thus the braking torque of the rotor change by increasing or reducing the external load generator.

The drawing shows a diagram Turkological installation, bleed air from the high pressure compressor of the turbofan engine with a separation of contour threads.

A method of obtaining cold in Turkological installation is carried out as follows.

Atmospheric air is compressed with increasing temperature in the compressor (1) turbojet engine and through line (2) high pressure is fed through the network pressure regulator (3) “after” in air-to-air heat exchanger (4), which cools the purge air. The purge (cooling) air flows from the atmosphere through the suction channel (5) and then, after an air-to-air heat exchanger (IWT), released into the environment (atmosphere). Pre-cooled in AME compressed air is directed to the expansion cooling turbine (6). In the expansion process is lowering the air temperature and the return of the mechanical energy of the braking device, such as brake turbocharger (7), kinematically associated shaft (8) with the rotor cooling turbine. After the turbine (6) Finance or in the cooling system of the turbine engine. During the operation of the set temperature value of air for cooling the turbine and the initial value of the pressure net pressure regulator, measure the pressure of the air taken from the compressor of the engine, the temperature and pressure at the turbine inlet temperature and pressure for the turbine and the speed of its rotor. Determine the degree of pressure reduction turbine, the current value of a given frequency of rotation of the rotor and the optimal value of the given frequency of rotation of the rotor corresponds to the maximum efficiency of the turbine. If the current value of a given rotation frequency less than the optimal values are given rotational speed, while decreasing the braking torque of the rotor. If the current value of a given speed more than the optimum value, then the braking torque of the rotor is increased. Thus the braking torque of the rotor change by influencing the braking device until the equality of the optimal and the current values of frequency of rotation of the rotor cooling turbine. If the measured temperature value of the air for the turbine is less than the specified, then reduce the amount of purge air, until equality is a given, and every increase of the quantity of purge air, until equality is defined and measured temperature values. If it is impossible to achieve equality and optimal current values of frequency of rotation of the turbine rotor by influencing the braking device, then set the new value of the pressure for the network controller is lower than the initial value, while the new setpoint pressure is again measured pressure turbine inlet temperature and pressure for the turbine and the speed of its rotor, determine the degree of pressure reduction turbine, the current value of a given frequency of rotation of the rotor and the optimal value of the given frequency of rotation of the rotor corresponds to the maximum efficiency of the turbine. If the current value of a given rotation frequency less than the optimal values are given rotational speed, while decreasing the braking torque of the rotor. If the current value of a given speed more than the optimum value, then the braking torque of the rotor is increased and the braking torque of the rotor change by influencing the braking device until the equality of the optimal and the current values of frequency of rotation of the turbine rotor. Then, if the measured value of temperance specified and measured temperature values. If the measured value of the air temperature for the turbine exceeds the specified value, then increase the amount of purge air, until equality is defined and measured temperature values. If again it is impossible to achieve equality and optimal current values of frequency of rotation of the turbine rotor by influencing the braking device, then set the new value of the pressure for the network controller is lower than the specified previous value, and repeat the above sequence of processes starting from the measurement of the pressure at the turbine inlet, temperature and pressure for the turbine and the speed of its rotor, until the equality of the optimal and the current values of frequency of rotation of the turbine rotor and equality defined and measured values of air temperature for the turbine.

The amount of purge air can be changed by reducing or increasing the degree of throttling of the flow of purge air through the valve (10) on the input or output it from an air-to-air heat exchanger.

As the brake device can be applied hydraulic pump or turbocharger (7), or a generator. In the case of hadronisation discharge. When using a turbocharger (fan) the braking torque of the rotor change, reducing or increasing the resistance of the network using the throttle (11) on the discharge side of the turbocharger (7), and the installation of a generator braking torque change by increasing or reducing the external load generator.

In Turkological installation implementing the method may be applied to the control unit, implemented on microprocessors, devices for converting analog signals into digital and switching devices. In the control unit the measured and preset parameters in the form of electrical signals to the microprocessor (computer), which are summarized based on the characteristics of the turbine, stored in the memory of the microprocessor (computer), output signals via actuators served on braking device (7) for varying the braking torque of the turbine rotor (6), the automatic valve (10) to change the number of purge air and the valve network pressure regulator (3) to change the pressure of air behind him.

High energy efficiency of the proposed method of obtaining cold in Turkological installed with air bleed from compre and a constant preset temperature of the air exiting from the turbine in a changing operating parameters and thermal loads with the least expenditure of energy.

Claims

1. A method of obtaining cold in Turkological installed with air bleed from the compressor turbojet engine by compressing atmospheric air in the compressor of the engine, control the pressure tapped from the compressor air network pressure regulator, cooling it in air-to-air heat exchanger vent air coming from the atmosphere, the subsequent expansion of the compressed air in the refrigeration turbine by lowering its temperature and output mechanical power brake device is kinematically associated with the rotor cooling turbine, characterized in that the set value of the air temperature for the turbine and the initial value of the pressure net pressure regulator, measure the pressure of the air taken from the compressor of the engine, the temperature and pressure at the turbine inlet temperature and pressure for the turbine and the speed of its rotor, determine the degree of pressure reduction turbine, the current value of a given frequency of rotation of the rotor and the optimal value of the given frequency of rotation of the rotor corresponds to the maximum efficiency of the turbine, if the current value of a given rotation frequency is less than optimal given the speed more than the optimum value, then the braking torque of the rotor increases, while the braking torque of the rotor change by influencing the braking device until the equality of the optimal and the current values of frequency of rotation of the turbine rotor, if the measured temperature value of the air for the turbine is less than the specified, then reduce the amount of purge air, until equality is defined and measured values of temperature, if the measured value of the air temperature for the turbine exceeds the specified value, then increase the amount of purge air, until equality is defined and measured temperature values, if it is impossible to achieve equality and optimal current values of frequency of rotation of the turbine rotor by influencing the braking device, then set the new value of the pressure for the network controller, lower than the initial value, while the new setpoint pressure is again measured pressure turbine inlet temperature and pressure for the turbine and the speed of its rotor, determine the degree of pressure reduction turbine, the current value of a given frequency of rotation of the rotor and the optimal value of the given frequency of rotation of the rotor (s) is the optimal value given speed, then reduce the braking torque of the rotor, if the current value of a given speed more than the optimum value, then the braking torque of the rotor is increased and the braking torque of the rotor change by influencing the braking device until the equality of the optimal and the current values of frequency of rotation of the turbine rotor, then, if the measured temperature value of the air for cooling the turbine is less than the specified, then reduce the amount of purge air, until equality is defined and measured values of temperature, if the measured value of the air temperature for the turbine exceeds the specified value, then increase the amount of purge air, until equality is defined and measured temperature values, if it is impossible to achieve equality and optimal current values of frequency of rotation of the turbine rotor by influencing the braking device, then set the new value of the pressure for the network controller, lower than the specified previous value, and repeat the above sequence of processes starting from the measurement of the pressure at the turbine inlet, temperature and pressure for the turbine and frequency presentaron and equality defined and measured values of air temperature for the turbine.

2. The method according to p. 1, characterized in that the amount of purge air change by reducing or increasing the degree of throttling of the flow of the purge air enters an air-to-air heat exchanger.

3. The method according to p. 1, characterized in that the amount of purge air change by reducing or increasing the degree of throttling of the flow of purge air out air-to-air heat exchanger.

4. The method according to p. 1, or 2, or 3, characterized in that the braking device using the hydraulic pump, while the braking torque of the rotor change, reducing or increasing the degree of throttling of the working fluid on the discharge side of the hydraulic pump.

5. The method according to p. 1, or 2, or 3, characterized in that the braking device is used turbocharger, while the braking torque of the rotor change, reducing or increasing the resistance of the network at the discharge side of the turbocharger.

6. The method according to p. 1, or 2, or 3, characterized in that the braking device use the generator, while the braking torque of the rotor change by increasing or reducing the external load generator.

 

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