Optimization design method for gas-liquid separation in refrigeration equipment

Abstract

The invention relates to the technical field of gas-liquid separation optimization, and discloses an optimization design method for gas-liquid separation in refrigeration equipment. Comprising the steps of installing a gas-liquid separator, installing a refrigerating system monitoring tool, installing a sensor and a monitoring instrument, adding components for improving the separation efficiency, adding auxiliary equipment, installing an intelligent control system and installing a compressor rotating speed control diverter valve. Through the optimization design method, the problems of liquid impact, refrigerant leakage and pipeline blockage possibly existing in the refrigerating system can be found in time so as to be solved in time, the stability and reliability of the whole refrigerating system are ensured, and the efficiency of the refrigerating system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of gas-liquid separation optimization, and in particular relates to an optimization design method for gas-liquid separation in refrigeration equipment. Background Art

[0002] As an important part of the refrigeration system, the gas-liquid separator is mainly used to separate and preserve the refrigerant liquid in the return pipe, preventing the liquid refrigerant from directly entering the compressor, thereby protecting the compressor. Liquid hammer is one of the main causes of compressor damage. When liquid refrigerant enters the compressor, it will impact the components of the compressor and cause damage. By optimizing the gas-liquid separation technology, liquid refrigerant and gaseous refrigerant can be separated more effectively to ensure that only pure gaseous refrigerant enters the compressor, thereby avoiding the occurrence of liquid hammer. At the same time, if the gas-liquid separation is not thorough, the liquid refrigerant may leak into the system with the flow of gas, resulting in refrigerant loss and environmental pollution. Moreover, in the refrigeration system, pipe blockage is also a common problem. When the liquid refrigerant flows in the pipe, it may solidify due to too slow a flow rate or too low a temperature, causing pipe blockage and affecting the efficiency of the refrigeration system. To this end, we propose an optimal design method for gas-liquid separation in refrigeration equipment. Summary of the invention

[0003] The purpose of the present invention is to provide an optimization design method for gas-liquid separation in refrigeration equipment in order to timely discover possible liquid hammer, refrigerant leakage, and pipe blockage problems in the refrigeration system so as to solve them in time, ensure the stability and reliability of the entire refrigeration system, and improve the efficiency of the refrigeration system.

[0004] The technical solution adopted by the present invention is as follows: An optimization design method for gas-liquid separation in refrigeration equipment, the optimization design method steps are: S1: Gas-liquid separator installation: The gas-liquid separator should be installed on the low-pressure pipeline between the reversing valve and the compressor, and as close to the inlet end of the compressor as possible to ensure that the liquid refrigerant and lubricating oil are fully separated and buffered before returning to the compressor. During installation, ensure that the inlet and outlet pipes of the gas-liquid separator are connected correctly without leakage, and leave enough operating space for easy maintenance and overhaul. S2: Install a refrigeration system monitoring tool to monitor the pressure and temperature changes of the system in real time during the refrigerant charging process to determine whether the refrigerant charging amount is appropriate; S3: Install sensors and monitoring instruments. Install sensors at risk points in the refrigeration system where liquid refrigerant can enter the compressor, and feed the data monitored by the sensors back to the monitoring instruments to monitor the operating status and parameter changes of the refrigeration system in real time. According to the monitoring results, adjust the system parameters in time to ensure stable operation of the system and avoid the occurrence of liquid hammer. S4: Add components to improve separation efficiency. Add condenser components, wire mesh demister, liquid seal components and fiber filter components inside the gas-liquid separator so that these components can work together to condense and cool the separated liquid phase, remove impurities from the separated gas phase and filter the liquid phase, thereby further improving the efficiency of gas-liquid separation. S5: Add auxiliary equipment, such as a precooler at the front end of the gas-liquid separator and a regenerator at the rear end of the gas-liquid separator to optimize the performance of the entire refrigeration system; S6: Install the intelligent control system. The data received by the sensors and monitoring instruments are fed back to the intelligent control system. After receiving the data transmitted by the sensors, the intelligent control system performs preprocessing and cleaning to ensure the accuracy and reliability of the data. The collected pressure and temperature fluctuation correlation and characteristic information in time series are analyzed. According to the data analysis results, the intelligent control system determines whether the current working state of the separator is in the best state. If it is found that the working state of the separator deviates from the best state, the system should automatically adjust the working parameters such as pressure and temperature of the separator to ensure that it always maintains the best working state; S7: Install the compressor speed control diverter valve. Install the compressor speed control diverter valve between the gas-liquid separator and the compressor, and connect the installed compressor speed control diverter valve to the intelligent control system. The intelligent control system sends a control signal to the diverter valve to adjust its valve opening, thereby realizing the return of refrigerant with different dryness to the heat exchanger under different working conditions.

[0005] In a preferred embodiment of the invention, the refrigeration system monitoring tool is a pressure gauge and a thermometer.

[0006] In a preferred embodiment of the invention, the pressure gauges are installed at the suction port and exhaust port of the compressor, the inlet and outlet of the condenser, and the inlet and outlet of the evaporator, so as to be able to monitor the pressure changes at these key locations in real time.

[0007] In a preferred embodiment of the invention, the thermometers are installed at the inlet and outlet of the evaporator and the inlet and outlet of the condenser so as to monitor the temperature changes of these parts in real time.

[0008] In a preferred embodiment of the invention, the sensor includes a pressure sensor, a temperature sensor, a flow sensor and a liquid level sensor.

[0009] In a preferred embodiment of the invention, the pressure sensor is installed at the compressor suction port, the evaporator outlet and the condenser inlet, and the temperature sensor is installed at the compressor suction port, the evaporator outlet and inside the gas-liquid separator.

[0010] In a preferred embodiment of the invention, the flow sensor is installed before and after the electronic expansion valve, and the liquid level sensor is installed inside the gas-liquid separator.

[0011] In a preferred embodiment of the invention, the analysis and processing algorithms used by the intelligent control system include time series analysis, recurrent neural network algorithm, long short-term memory network algorithm, deep learning algorithm, anomaly detection algorithm, clustering algorithm, reinforcement learning algorithm, feature extraction and dimensionality reduction technology and integrated learning algorithm.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, by installing refrigeration system monitoring tools, sensors and monitoring equipment at the risk points where liquid refrigerant enters the compressor, the operating status and parameter changes of the refrigeration system are monitored in real time. By monitoring the changes in these parameters, the system can promptly detect the risk of liquid refrigerant entering the compressor and take corresponding control measures to adjust the refrigerant flow entering the compressor to ensure that the compressor always operates under safe conditions. This helps to promptly detect possible liquid hammer, refrigerant leakage, and pipeline blockage problems in the refrigeration system so that they can be solved in a timely manner, thereby ensuring the stability and reliability of the entire refrigeration system, improving the efficiency of the refrigeration system, and reducing energy consumption costs.

[0013] 2. In the present invention, a condenser assembly is added inside the gas-liquid separator to convert part of the steam in the gas into liquid through condensation, which is convenient for subsequent gas-liquid separation and thus improves the separation efficiency; the wire mesh demister can effectively remove tiny droplets and foam entrained in the gas, further improving the purity of gas-liquid separation; the filtering effect of the fiber filter assembly can capture and remove fine particles and impurities in the gas, enhance the separation effect, and protect downstream equipment while improving the gas-liquid separation efficiency.

[0014] 3. In the present invention, by pre-cooling the refrigerant entering the refrigeration system, its temperature can be lowered, so that it is easier to absorb heat and evaporate in the subsequent evaporation process, which not only improves the evaporation efficiency of the refrigerant, but also reduces the workload of the compressor, thereby improving the efficiency of the entire refrigeration system; at the same time, a regenerator is arranged at the rear end of the gas-liquid separator, and heat energy recovery can be achieved by utilizing the heat transfer between the high-temperature gas and the liquid. The heat in the high-temperature gas separated from the gas-liquid separator can be recovered and used to heat the low-temperature liquid entering the system, thereby realizing efficient utilization of energy, which not only saves energy but also improves the efficiency of the entire refrigeration system.

[0015] 4. In the present invention, the intelligent control system accurately controls the speed of the compressor, and then adjusts the opening of the diverter valve, which can ensure that the refrigeration system can maintain the best working state under different working conditions, help to achieve the reasonable distribution of refrigerant under different working conditions, avoid the occurrence of overcooling or overheating, thereby improving the working performance of the entire refrigeration system and improving the efficiency of the entire refrigeration system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a processing flow chart of the filament high-strength polyester sewing thread. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The following will be combined Figure 1 A method for optimizing the design of gas-liquid separation in a refrigeration equipment according to an embodiment of the present invention is described in detail. Example

[0019] Reference Figure 1, an optimization design method for gas-liquid separation in refrigeration equipment, the optimization design method steps are: gas-liquid separator installation, the gas-liquid separator should be installed on the low-pressure pipeline between the reversing valve and the compressor, and as close to the inlet end of the compressor as possible, to ensure that the liquid refrigerant and lubricating oil are fully separated and buffered before returning to the compressor. During installation, the inlet and outlet pipes of the gas-liquid separator should be connected correctly without leakage, and sufficient operating space should be left for maintenance and inspection; refrigeration system monitoring tools are installed, during the refrigerant charging process, the pressure and temperature changes of the system are monitored in real time to determine whether the refrigerant charging amount is appropriate; sensors and monitoring instruments are installed, the sensors are installed at the risk points of the refrigeration system to monitor the liquid refrigerant entering the compressor, and the data monitored by the sensors are fed back to the monitoring instruments, so as to monitor the operating status and parameter changes of the refrigeration system in real time, and according to the monitoring results, the system parameters are adjusted in time to ensure the stable operation of the system and avoid the occurrence of liquid hammer; the refrigeration system monitoring tools are pressure gauges and thermometers, the pressure gauges are installed at the suction and exhaust ports of the compressor, the inlet and outlet of the condenser, and the inlet and outlet of the evaporator, so as to be able to The pressure changes in these key parts are monitored in real time. Thermometers are installed at the inlet and outlet of the evaporator and the inlet and outlet of the condenser so that the temperature changes in these parts can be monitored in real time. The sensors include pressure sensors, temperature sensors, flow sensors and liquid level sensors. The pressure sensor is installed at the compressor suction port, evaporator outlet and condenser inlet. The temperature sensor is installed at the compressor suction port, evaporator outlet and inside the gas-liquid separator. The flow sensor is installed before and after the electronic expansion valve, and the liquid level sensor is installed inside the gas-liquid separator. Specifically, by installing refrigeration system monitoring tools, sensors and monitoring equipment at the risk points where liquid refrigerant enters the compressor, the operating status and parameter changes of the refrigeration system are monitored in real time. By monitoring the changes in these parameters, the system can promptly detect the risk of liquid refrigerant entering the compressor and take corresponding control measures to adjust the refrigerant flow entering the compressor to ensure that the compressor always operates under safe conditions. It helps to promptly detect possible liquid hammer, refrigerant leakage, and pipeline blockage problems in the refrigeration system so that they can be solved in time to ensure the stability and reliability of the entire refrigeration system, improve the efficiency of the refrigeration system, and reduce energy consumption costs.

[0020] Reference Figure 1, add components to improve separation efficiency, add a condenser component, a wire mesh demister, a liquid seal component and a fiber filter component inside the gas-liquid separator, so that these components can work together to condense and cool the separated liquid phase, remove impurities for the separated gas phase and filter the liquid phase, thereby further improving the efficiency of gas-liquid separation; specifically, adding a condenser component inside the gas-liquid separator can convert part of the vapor in the gas into liquid through condensation, which is convenient for subsequent gas-liquid separation and thus improves the separation efficiency; the wire mesh demister can effectively remove tiny droplets and foam entrained in the gas, further improving the purity of gas-liquid separation; the filtering effect of the fiber filter component can capture and remove fine particles and impurities in the gas, enhance the separation effect, and protect downstream equipment while improving the gas-liquid separation efficiency.

[0021] Reference Figure 1 , add auxiliary equipment, add a precooler at the front end of the gas-liquid separator, and a heat regenerator at the rear end of the gas-liquid separator to optimize the performance of the entire refrigeration system; specifically, by precooling the refrigerant entering the refrigeration system, its temperature can be lowered, making it easier to absorb heat and evaporate in the subsequent evaporation process, which not only improves the evaporation efficiency of the refrigerant, but also reduces the workload of the compressor, thereby improving the efficiency of the entire refrigeration system; at the same time, a heat regenerator is set at the rear end of the gas-liquid separator, and the heat transfer between the high-temperature gas and the liquid can be used to realize heat energy recovery. The heat in the high-temperature gas separated from the gas-liquid separator can be recovered and used to heat the low-temperature liquid entering the system, thereby realizing efficient utilization of energy, which can not only save energy but also improve the efficiency of the entire refrigeration system.

[0022] Reference Figure 1, install the intelligent control system, the data received by the sensors and monitoring instruments are fed back to the intelligent control system, and the intelligent control system performs preprocessing and cleaning after receiving the data transmitted by the sensors to ensure the accuracy and reliability of the data, and analyzes the correlation relationship and characteristic information of the collected pressure and temperature fluctuations in time series. According to the data analysis results, the intelligent control system determines whether the current working state of the separator is in the best state. If it is found that the working state of the separator deviates from the best state, the system should automatically adjust the working parameters such as pressure and temperature of the separator to ensure that it always maintains the best working state; the analysis and processing algorithms used by the intelligent control system include time series analysis, recurrent neural network algorithm, long short-term memory network algorithm, deep learning algorithm, anomaly detection algorithm, clustering algorithm, Reinforcement learning algorithm, feature extraction and dimensionality reduction technology and integrated learning algorithm; install a compressor speed control diverter valve, install the compressor speed control diverter valve between the gas-liquid separator and the compressor, and connect the installed compressor speed control diverter valve to the intelligent control system, send a control signal to the diverter valve through the intelligent control system, adjust its valve opening, so as to realize the return of refrigerant with different dryness to the heat exchanger under different working conditions; specifically, the intelligent control system can accurately control the speed of the compressor, and then adjust the opening of the diverter valve, so as to ensure that the refrigeration system can maintain the best working state under different working conditions, help to realize the reasonable distribution of refrigerant under different working conditions, avoid the occurrence of overcooling or overheating, thereby improving the working performance of the entire refrigeration system and improving the efficiency of the entire refrigeration system.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for optimizing the design of gas-liquid separation in refrigeration equipment, characterized in that: The steps of the optimization design method are: S1: Gas-liquid separator installation: The gas-liquid separator should be installed on the low-pressure pipeline between the reversing valve and the compressor, and as close to the inlet end of the compressor as possible to ensure that the liquid refrigerant and lubricating oil are fully separated and buffered before returning to the compressor. During installation, ensure that the inlet and outlet pipes of the gas-liquid separator are connected correctly without leakage, and leave enough operating space for easy maintenance and overhaul. S2: Install a refrigeration system monitoring tool to monitor the pressure and temperature changes of the system in real time during the refrigerant charging process to determine whether the refrigerant charging amount is appropriate; S3: Install sensors and monitoring instruments. Install sensors at risk points in the refrigeration system where liquid refrigerant can enter the compressor, and feed the data monitored by the sensors back to the monitoring instruments to monitor the operating status and parameter changes of the refrigeration system in real time. According to the monitoring results, adjust the system parameters in time to ensure stable operation of the system and avoid the occurrence of liquid hammer. S4: Add components to improve separation efficiency. Add condenser components, wire mesh demister, liquid seal components and fiber filter components inside the gas-liquid separator so that these components can work together to condense and cool the separated liquid phase, remove impurities from the separated gas phase and filter the liquid phase, thereby further improving the efficiency of gas-liquid separation. S5: Add auxiliary equipment, such as a precooler at the front end of the gas-liquid separator and a regenerator at the rear end of the gas-liquid separator to optimize the performance of the entire refrigeration system; S6: Install the intelligent control system. The data received by the sensors and monitoring instruments are fed back to the intelligent control system. After receiving the data transmitted by the sensors, the intelligent control system performs preprocessing and cleaning to ensure the accuracy and reliability of the data. The collected pressure and temperature fluctuation correlation and characteristic information in time series are analyzed. According to the data analysis results, the intelligent control system determines whether the current working state of the separator is in the best state. If it is found that the working state of the separator deviates from the best state, the system should automatically adjust the working parameters such as pressure and temperature of the separator to ensure that it always maintains the best working state; S7: Install the compressor speed control diverter valve. Install the compressor speed control diverter valve between the gas-liquid separator and the compressor, and connect the installed compressor speed control diverter valve to the intelligent control system. The intelligent control system sends a control signal to the diverter valve to adjust its valve opening, thereby realizing the return of refrigerant with different dryness to the heat exchanger under different working conditions.

2. The method for optimizing the design of gas-liquid separation in refrigeration equipment according to claim 1, characterized in that: The refrigeration system monitoring tools are pressure gauges and thermometers.

3. The method for optimizing the design of gas-liquid separation in refrigeration equipment according to claim 2, characterized in that: The pressure gauges are installed at the suction and exhaust ports of the compressor, the inlet and outlet of the condenser, and the inlet and outlet of the evaporator so as to be able to monitor the pressure changes in these key locations in real time.

4. The method for optimizing the design of gas-liquid separation in refrigeration equipment according to claim 2, characterized in that: The thermometers are installed at the inlet and outlet of the evaporator and the inlet and outlet of the condenser so as to be able to monitor the temperature changes of these parts in real time.

5. The method for optimizing the design of gas-liquid separation in refrigeration equipment according to claim 1, characterized in that: The sensors include pressure sensors, temperature sensors, flow sensors and liquid level sensors.

6. The method for optimizing the design of gas-liquid separation in refrigeration equipment according to claim 5, characterized in that: The pressure sensor is installed at the compressor suction port, the evaporator outlet and the condenser inlet, and the temperature sensor is installed at the compressor suction port, the evaporator outlet and inside the gas-liquid separator.

7. The method for optimizing the design of gas-liquid separation in refrigeration equipment according to claim 5, characterized in that: The flow sensor is installed before and after the electronic expansion valve, and the liquid level sensor is installed inside the gas-liquid separator.

8. The method for optimizing the design of gas-liquid separation in refrigeration equipment according to claim 1, characterized in that: The analysis and processing algorithms used by the intelligent control system include time series analysis, recurrent neural network algorithm, long short-term memory network algorithm, deep learning algorithm, anomaly detection algorithm, clustering algorithm, reinforcement learning algorithm, feature extraction and dimensionality reduction technology and integrated learning algorithm.

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