CN-117029347-B - Carbon dioxide refrigeration house system and control method thereof

CN117029347BCN 117029347 BCN117029347 BCN 117029347BCN-117029347-B

Abstract

The invention relates to a refrigeration house system and a control method, wherein the refrigeration house system comprises a photovoltaic power generation subsystem, an energy management subsystem and an energy management subsystem, wherein the photovoltaic power generation subsystem comprises a solar photovoltaic module and a second power utilization branch, the second power utilization branch is connected with a carbon dioxide refrigeration subsystem and is used for supplying power to the carbon dioxide refrigeration subsystem, the carbon dioxide refrigeration subsystem comprises a compressor unit, a condensing unit and a plurality of cooling units, the cooling units are connected in parallel and are respectively connected with different refrigeration houses, and the energy management subsystem is respectively connected with the photovoltaic power generation subsystem and the carbon dioxide refrigeration subsystem and is used for data acquisition and real-time monitoring of the power utilization units of the photovoltaic power generation subsystem and the cooling units and the compressor units of the carbon dioxide refrigeration subsystem. The above can realize a near zero energy consumption/near zero carbon refrigeration house system.

Inventors

ZHANG XINRONG
Zeng Minqiang
ZHENG QIUYUN
YIN LIMIN
XIAO FENG
ZHANG MINGFA

Assignees

北京大学南昌创新研究院

Dates

Publication Date: 20260505
Application Date: 20230803

Claims (10)

1. A refrigeration storage system, comprising: the photovoltaic power generation subsystem comprises a solar photovoltaic module and a second power utilization branch, and the second power utilization branch is connected with the carbon dioxide refrigeration subsystem and is used for supplying power to the carbon dioxide refrigeration subsystem; The energy management subsystem is respectively connected with the photovoltaic power generation subsystem and the carbon dioxide refrigeration subsystem, and is used for collecting and monitoring data in real time from the power utilization unit of the photovoltaic power generation subsystem and the cooling unit and the compressor unit of the carbon dioxide refrigeration subsystem; The plurality of cooling units comprise a first cooling unit, a second cooling unit, a third cooling unit and a fourth cooling unit, wherein the first cooling unit comprises a first electromagnetic valve, a second electromagnetic valve, a first carbon dioxide ejector, a first carbon dioxide gas-liquid separator and a first electronic expansion valve, the second cooling unit comprises a third electromagnetic valve, a fourth electromagnetic valve, a second carbon dioxide ejector, a second carbon dioxide gas-liquid separator, a second electronic expansion valve, a first carbon dioxide storage tank and a first carbon dioxide delivery pump, the third cooling unit comprises a fifth electromagnetic valve, a sixth electromagnetic valve, a third carbon dioxide ejector, a third carbon dioxide gas-liquid separator, a third electronic expansion valve, a second carbon dioxide storage tank and a second carbon dioxide delivery pump, and the fourth cooling unit comprises a seventh electromagnetic valve, an eighth electromagnetic valve, a fourth carbon dioxide ejector, a fourth carbon dioxide gas-liquid separator, a fourth electronic expansion valve, a third carbon dioxide storage tank and a third carbon dioxide delivery pump.
2. The refrigeration house system of claim 1, wherein the photovoltaic power generation subsystem further comprises a first electric branch and a third electric branch, wherein the first electric branch, the second electric branch and the third electric branch are connected in parallel, and wherein the first electric branch is connected with other electric units in a periphery park of the refrigeration house; The first power branch comprises a first power switch and a voltage stabilizer which are connected in series, the second power branch comprises a second power switch, an energy storage and power storage assembly, a first photovoltaic inverter and a distribution box which are connected in series, the third power branch comprises a third power switch, a second photovoltaic inverter and a voltage boosting assembly which are connected in series, the other power units comprise other power loads, the refrigeration house power unit comprises a refrigeration house power load, and the high-voltage grid-connected power unit comprises a high-voltage power grid.
3. The refrigeration storage system according to claim 2, wherein the photovoltaic power generation subsystem further comprises a solar controller, the solar controller has a first output port, a second output port and a third output port, the first output port is connected to a voltage regulator input port through a wire, and the first electrical switch is arranged on a line between the solar controller and the voltage regulator; The second output port is connected to the input port of the energy storage and electricity storage component through an electric wire, and the second electric switch is arranged on a circuit between the solar controller and the energy storage and electricity storage component; the energy storage and electricity storage assembly output port is connected to the first photovoltaic inverter through an electric wire, and is connected to the first photovoltaic inverter input port through an electric wire; The third output port of the solar controller is connected to the input port of the second photovoltaic inverter through an electric wire, the third electric switch is arranged on a circuit between the solar controller and the second photovoltaic inverter, the output port of the second photovoltaic inverter is connected to the input port of the boosting component through an electric wire, and the output port of the boosting component is connected to a high-voltage power grid through an electric wire.
4. The refrigeration system of claim 1, wherein the first to fourth cooling units are connected in parallel, the first cooling unit is connected to an ice bank, the second cooling unit is connected to a 0-5 ℃ refrigerator, the third cooling unit is connected to a-18 to-25 ℃ freezer, and the fourth cooling unit is connected to a-35 to-40 ℃ freezer.
5. The refrigeration system of claim 4, wherein the ice store corresponds to an ice making heat exchanger, wherein the refrigeration store corresponds to a first refrigeration store heat exchanger, wherein the refrigeration store corresponds to a second refrigeration store heat exchanger, and wherein the refrigeration store corresponds to a third refrigeration store heat exchanger.
6. The refrigeration chiller system of claim 1, wherein the compressor unit outlet is connected by a conduit to a negative pressure evaporative carbon dioxide condenser carbon dioxide inlet, wherein the compressor unit comprises at least one compressor and a plurality of compressors are connected in parallel; The negative pressure evaporation type carbon dioxide condenser carbon dioxide outlet is divided into first to fourth fluid branches, the negative pressure evaporation type carbon dioxide condenser carbon dioxide outlet is connected to a first carbon dioxide ejector high-pressure fluid inlet through a first fluid branch pipeline, the first electromagnetic valve is arranged on a pipeline between the negative pressure evaporation type carbon dioxide condenser and the first carbon dioxide ejector, the first carbon dioxide ejector outlet is connected to a first carbon dioxide gas-liquid separator inlet through a pipeline, the first carbon dioxide gas-liquid separator gas outlet is connected to a compressor unit inlet through a pipeline, the second electromagnetic valve is arranged on a pipeline between the first carbon dioxide gas-liquid separator and the compressor unit, the first carbon dioxide gas-liquid separator liquid outlet is connected to a first electronic expansion valve inlet through a pipeline, the first electronic expansion valve outlet is connected to an ice-making heat exchanger carbon dioxide inlet through a pipeline, and the ice-making heat exchanger carbon dioxide outlet is connected to the first carbon dioxide ejector low-pressure fluid inlet through a pipeline; The negative pressure evaporation type carbon dioxide condenser is characterized in that a carbon dioxide outlet is connected to a high-pressure fluid inlet of a second carbon dioxide ejector through a second fluid branch pipeline, a third electromagnetic valve is arranged on a pipeline between the negative pressure evaporation type carbon dioxide condenser and the second carbon dioxide ejector, the second carbon dioxide ejector outlet is connected to a second carbon dioxide gas-liquid separator inlet through a pipeline, a second carbon dioxide gas-liquid separator gaseous outlet is connected to a compressor unit inlet through a pipeline, a fourth electromagnetic valve is arranged on a pipeline between the second carbon dioxide gas-liquid separator and the compressor unit, a second carbon dioxide gas-liquid separator liquid outlet is connected to a second electronic expansion valve inlet through a pipeline, the second electronic expansion valve outlet is connected to a first carbon dioxide storage tank inlet through a pipeline, and a first carbon dioxide storage tank gaseous outlet is connected to the second carbon dioxide ejector high-pressure fluid inlet through a pipeline; The negative pressure evaporation type carbon dioxide condenser carbon dioxide outlet is connected to a high-pressure fluid inlet of a third carbon dioxide ejector through a third fluid branch pipeline, the fifth electromagnetic valve is arranged on a pipeline between the negative pressure evaporation type carbon dioxide condenser and the third carbon dioxide ejector, the third carbon dioxide ejector outlet is connected to a third carbon dioxide gas-liquid separator inlet through a pipeline, the third carbon dioxide gas-liquid separator gaseous outlet is connected to a compressor unit inlet through a pipeline, the sixth electromagnetic valve is arranged on a pipeline between the third carbon dioxide gas-liquid separator and the compressor unit, the third carbon dioxide gas-liquid separator liquid outlet is connected to a third electronic expansion valve inlet through a pipeline, the third electronic expansion valve outlet is connected to a second carbon dioxide storage tank inlet through a pipeline, and the second carbon dioxide storage tank gaseous outlet is connected to the third carbon dioxide ejector high-pressure fluid inlet through a pipeline.
7. The refrigeration chiller system of claim 6, wherein the negative pressure evaporative carbon dioxide condenser carbon dioxide outlet is connected to a fourth carbon dioxide ejector high pressure fluid inlet through a fourth fluid bypass conduit, the seventh solenoid valve is disposed on a line between the negative pressure evaporative carbon dioxide condenser and the fourth carbon dioxide ejector, the fourth carbon dioxide ejector outlet is connected to a fourth carbon dioxide gas-liquid separator inlet through a conduit, the fourth carbon dioxide gas-liquid separator gaseous outlet is connected to a compressor unit inlet through a conduit, the eighth solenoid valve is disposed on a line between the fourth carbon dioxide gas-liquid separator and the compressor unit, the fourth carbon dioxide gas-liquid separator liquid outlet is connected to a fourth electronic expansion valve inlet through a conduit, the fourth electronic expansion valve outlet is connected to a third carbon dioxide storage tank inlet through a conduit, the third carbon dioxide storage tank gaseous outlet is connected to a fourth carbon dioxide ejector low pressure fluid inlet through a conduit; a first heat exchange medium circulation loop is formed between the first carbon dioxide storage tank and the first refrigeration house heat exchanger, wherein the first carbon dioxide storage tank circulation side outlet is connected to the first carbon dioxide delivery pump inlet through a pipeline; a second heat exchange medium circulation loop is formed between the second carbon dioxide storage tank and the second refrigeration house heat exchanger, wherein the circulation side outlet of the second carbon dioxide storage tank is connected to the inlet of a second carbon dioxide delivery pump through a pipeline; The third heat exchange medium circulation loop is formed between the third carbon dioxide storage tank and the third refrigeration house heat exchanger, wherein the third carbon dioxide storage tank circulation side outlet is connected to the third carbon dioxide conveying pump inlet through a pipeline, the third carbon dioxide conveying pump outlet is connected to the third refrigeration house heat exchanger carbon dioxide inlet through a pipeline, and the third refrigeration house heat exchanger carbon dioxide outlet is connected to the third carbon dioxide storage tank circulation side inlet through a pipeline to form the third heat exchange medium circulation loop.
8. The refrigeration system of claim 1, wherein the energy management subsystem comprises a photovoltaic data monitoring platform, a refrigeration data monitoring platform, a total data supervision platform, first to seventh electrical energy sensors, first to fourth voltage sensors, first to fourth current sensors, first to fifth pressure sensors, first to fifth temperature sensors, first to third humidity sensors; the photovoltaic data monitoring platform monitors real-time data of other power utilization units according to the first electric quantity sensor, the first voltage sensor and the first current sensor; The photovoltaic data monitoring platform monitors real-time data of the refrigeration house electricity utilization unit according to the second electric quantity sensor, the second voltage sensor and the second current sensor; the photovoltaic data monitoring platform monitors real-time data of the high-voltage grid-connected unit according to a third electric quantity sensor, a third voltage sensor and a third current sensor; The refrigeration house data monitoring platform monitors real-time data of the compressor unit according to a fourth electric quantity sensor, a fourth voltage sensor and a fourth current sensor; The refrigeration house data monitoring platform monitors the real-time data of the power consumption of the first carbon dioxide conveying pump according to the fifth electric quantity sensor, monitors the real-time data of the carbon dioxide pressure in the first carbon dioxide storage tank through the first pressure sensor, monitors the real-time data of the carbon dioxide temperature in the first carbon dioxide storage tank and the temperature in the refrigeration house through the first temperature sensor, monitors the real-time data of the humidity of the refrigeration house through the first humidity sensor, monitors the real-time data of the power consumption of the second carbon dioxide conveying pump through the sixth electric quantity sensor, monitors the real-time data of the carbon dioxide pressure in the second carbon dioxide storage tank through the second pressure sensor, monitors the real-time data of the carbon dioxide temperature in the second carbon dioxide storage tank and the real-time data of the temperature in the refrigeration house through the second humidity sensor, monitors the real-time data of the refrigeration house through the third carbon dioxide conveying pump through the seventh electric quantity sensor, monitors the real-time data of the carbon dioxide pressure in the third carbon dioxide storage tank through the third pressure sensor, monitors the real-time data of the temperature in the refrigeration house through the third temperature sensor, monitors the real-time data of the refrigeration house through the fourth heat exchanger, and the real-time data of the refrigeration house through the pressure sensor, and monitoring temperature real-time data at a carbon dioxide inlet and a carbon dioxide outlet in the negative pressure evaporation type carbon dioxide condenser through a fifth temperature sensor.
9. A control method of a refrigeration house system according to claim 1, comprising: Controlling the energy management subsystem to start and run, and controlling the photovoltaic power generation subsystem to start; When the solar power generation capacity of the photovoltaic power generation subsystem meets a first preset condition, a second electric switch is started, and the energy storage and electricity storage assembly normally operates; And when the storage capacity of the energy storage and electricity storage component reaches a first threshold value, controlling the energy storage and electricity storage component to supply power to the refrigeration house electricity utilization unit, and when the storage capacity is smaller than a second threshold value, stopping supplying power to the refrigeration house electricity utilization unit, and simultaneously switching the refrigeration house to conventional electricity utilization.
10. A control method of a refrigeration house system according to any one of claims 2 to 8, characterized in that the refrigeration house system comprises: Controlling the energy management subsystem to start and run, and controlling the photovoltaic power generation subsystem to start; When the daily power generation amount of the photovoltaic power generation subsystem is smaller than or equal to the power consumption amount of other power utilization loads, a first electric switch is started, and the other power utilization loads normally operate; When the daily power generation amount of the photovoltaic power generation subsystem is larger than the power consumption amount of other power consumption loads and smaller than or equal to the sum of the power consumption amounts of the power consumption loads of the refrigeration house and the other power consumption loads, a second electric switch is started, and the energy storage and power storage assembly normally operates; when the storage capacity of the energy storage and electricity storage component reaches a first threshold value, controlling the energy storage and electricity storage component to supply power to the refrigeration house electricity utilization unit, and when the storage capacity is smaller than a second threshold value, stopping supplying power to the refrigeration house electricity utilization unit, and simultaneously switching the refrigeration house to conventional electricity utilization; And when the energy storage and electricity storage assembly supplies power to the refrigeration house electricity utilization unit and the photovoltaic electricity generation amount is larger than other electricity utilization loads and refrigeration house electricity utilization loads, starting a third electric switch, and enabling the redundant electric quantity to be integrated into a power grid.

Description

Carbon dioxide refrigeration house system and control method thereof Technical Field The invention relates to the technical field of refrigeration, in particular to a carbon dioxide refrigeration house system and a control method thereof. Background The refrigeration house is used as the core of the whole cold chain transportation network, and about 70% of energy consumption is sourced from a refrigeration system. According to statistics, the annual electric charge of the Chinese refrigeration house exceeds 800 billions of primordial notes. By constructing the ultra-low energy consumption refrigeration house, the annual running electricity charge of the refrigeration house can be expected to be saved by hundreds of millions. The carbon emission in the logistics industry in 2020 is 8.57 hundred million tons, accounting for 8.7 percent of the total carbon emission. In addition, along with the acceleration of the substitution speed of the refrigerant in China, a novel refrigerant with zero ODP and low GWP is sought in the fourth stage at present, and CO 2 has the advantages of low carbon, environmental protection, high heat transfer efficiency and the like. In recent years, the construction of traditional refrigeration houses still has blindness and inefficiency. Under the background of environmental protection development in the refrigeration industry, 50% carbon emission in the cold chain logistics industry can be expected to be reduced annually by constructing an ultralow-energy-consumption refrigeration house. At present, the design of a near-zero energy consumption refrigeration house system is still lacking, the construction of an ultralow energy consumption refrigeration house is carried out under a double-carbon background, the contradiction between the expansion of the refrigeration house scale and the control of carbon emission is solved, the emission reduction and consumption reduction of the industry and the transformation of low carbon are accelerated, and the method has great significance for realizing the national carbon neutralization target. Disclosure of Invention Based on the above, it is necessary to provide a refrigeration house system, a device, a computer device and a storage medium, which solve the problem that a technician needs to write a large amount of codes manually during gesture test, and the workload is high, thereby reducing the efficiency of the test. A first aspect provides a refrigeration storage system comprising: The photovoltaic power generation subsystem comprises a solar photovoltaic module and a second power utilization branch, and the second power utilization branch is connected with the carbon dioxide refrigeration subsystem and is used for supplying power to the carbon dioxide refrigeration subsystem; The energy management subsystem is respectively connected with the photovoltaic power generation subsystem and the carbon dioxide refrigeration subsystem, and is used for data acquisition and real-time monitoring of the power utilization unit of the photovoltaic power generation subsystem and the cooling unit, the compressor unit and the condensing unit of the carbon dioxide refrigeration subsystem. In the scheme, the photovoltaic power generation subsystem further comprises a first electric branch and a third electric branch, wherein the first electric branch, the second electric branch and the third electric branch are connected in parallel, and the first electric branch is connected with other electric units in a peripheral park of the refrigerator; The first power branch comprises a first power switch and a voltage stabilizer which are connected in series, the second power branch comprises a second power switch, an energy storage and power storage assembly, a first photovoltaic inverter and a distribution box which are connected in series, the third power branch comprises a third power switch, a second photovoltaic inverter and a voltage boosting assembly which are connected in series, the other power units comprise other power loads, the refrigeration house power unit comprises a refrigeration house power load, and the high-voltage grid-connected power unit comprises a high-voltage power grid. In the scheme, the photovoltaic power generation subsystem further comprises a solar controller, wherein the solar controller is provided with a first output port, a second output port and a third output port, the first output port is connected to the input port of the voltage stabilizer through wires, and the first electric switch is arranged on a circuit between the solar controller and the voltage stabilizer; The second output port is connected to the input port of the energy storage and electricity storage component through an electric wire, and the second electric switch is arranged on a circuit between the solar controller and the energy storage and electricity storage component; the energy storage and electricity storage assembly output port is connected to the first