Energy-saving and cost-reducing system for cold box
By combining the refrigerated container energy-saving system and the refrigerated container cost-reduction system, and by utilizing frequency conversion control and energy storage management, the problem of high energy consumption during the stacking of refrigerated containers has been solved, achieving energy-saving and cost-reduction effects in refrigerated container electricity use.
Patent Information
- Application Number
- CN202423119346.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-16
AI Technical Summary
Existing refrigerated containers consume a lot of energy during storage, resulting in high energy costs, and the potential for energy conservation and cost reduction has not been fully explored.
By adopting a cold box energy-saving system and a cold box cost-reduction system, combined with an intelligent transformer, a cold box frequency converter and an energy storage system, the power frequency and power usage of the cold box are optimized through frequency conversion control and energy storage management, and energy storage and release are carried out by taking advantage of the difference between peak and off-peak electricity prices in the market.
This achieves energy conservation and consumption reduction in the electricity consumption of cold boxes, reduces energy consumption and electricity costs, and improves electricity efficiency and economy.
Smart Images
Figure CN223884952U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of power utilization management, in particular to a cold box energy-saving and cost-reducing system. BACKGROUND
[0002] The cold box of a container is divided into a refrigeration container and a refrigeration container, and the main difference between the two is the difference in refrigeration capacity and set temperature. The cold box service of a container terminal includes cold box loading and unloading, cold box stacking and cold box power supply service, wherein the cold box power supply service requires the container terminal to timely connect the power supply of the cold box and monitor and manage the power utilization. Generally, the cold box is loaded and unloaded by a container gantry crane, and after being stacked in a cold box special stacking yard, the plug of the air conditioner of the cold box is connected to the socket of the cold box rack by manually plugging in the power. The cold box adopts 380V alternating current power supply and needs 24-hour uninterrupted power supply. After the power supply is connected, the compressor of the cold box is automatically started to refrigerate according to the setting on the control panel, and when the temperature of the cold box rises above the set temperature, the compressor is restarted to refrigerate. The existing container terminal cold box has large energy consumption and high energy expenditure, and the potential for energy saving and cost reduction has not been fully tapped. SUMMARY
[0003] The utility model discloses a cold box energy-saving and cost-reducing system.
[0004] In a first aspect, the utility model provides a cold box energy-saving and cost-reducing system, which comprises a cold box energy-saving system and a cold box cost-reducing system; the cold box energy-saving system and the cold box cost-reducing system are connected to the secondary side of the same intelligent transformer; wherein the cold box energy-saving system comprises a cold box rack switch cabinet and a cold box frequency conversion power supply; the input end of the cold box rack switch cabinet is connected with the output end of the intelligent transformer, the input end of the cold box frequency conversion power supply is connected with the output end of the cold box rack switch cabinet, and the output end of the cold box frequency conversion power supply is connected with a cold box electric box; the cold box electric box is connected with a container cold box; the container cold box comprises a refrigeration container and / or a refrigeration container; the cold box cost-reducing system comprises an energy storage system switch cabinet and an energy storage system; the input end of the energy storage system switch cabinet is connected with the secondary side power supply bus of the intelligent transformer, and the output end of the energy storage system switch cabinet is connected with the energy storage system; the intelligent transformer is used for reducing and transforming the high voltage of commercial power and monitoring the power supply parameters and power quality of commercial power; the cold box frequency conversion power supply is used for converting the power frequency commercial power into preset frequency electric energy; and the energy storage system is used for storing energy and grid-connected power supply to the secondary side power supply bus of the intelligent transformer.
[0005] Further, the number of the cold box rack switch cabinets and the cold box frequency conversion power supplies is multiple, wherein one cold box rack switch cabinet is connected with one cold box frequency conversion power supply; and the output end of each cold box frequency conversion power supply is connected with one cold box electric box.
[0006] Further, the cold box electric box is connected with the container cold box through the cold box socket group.
[0007] Further, the energy storage system comprises an energy storage management system, a battery system, a current collection system, an energy storage converter, a monitoring system, a fire extinguishing system and a temperature control system; wherein the energy storage management system is used for monitoring and managing the cold box energy saving system; the battery system is used for storing and releasing electric energy; the current collection system is used for collecting and managing electric energy of a plurality of battery groups in the battery system; the energy storage converter is used for synchronously setting the voltage and current of the secondary side power supply bus of the intelligent transformer and the battery system; the monitoring system is used for video monitoring the internal and external environment of the cold box energy saving system; the fire extinguishing system is used for smoke and fire early warning and emergency fire fighting of the cold box energy saving system; and the temperature control system is used for thermal management of the battery system.
[0008] Further, the operation mode of the energy storage converter comprises a rectification mode and an inversion mode; wherein the rectification mode comprises real-time monitoring of the alternating voltage, alternating current and frequency of the secondary side power supply bus of the intelligent transformer, and converting the alternating current of the secondary side power supply bus of the intelligent transformer into direct current suitable for the battery system to charge and store energy in the battery system; and the inversion mode comprises real-time monitoring of the direct current voltage and direct current of the current collection system, and converting the direct current of the battery system into alternating current suitable for the secondary side power supply bus of the intelligent transformer to grid-connected power supply.
[0009] Further, the preset frequency comprises 40Hz-50Hz.
[0010] The cold box energy saving and energy consumption reducing system is adopted, the mode of synchronous energy saving and energy consumption reducing is adopted, the energy consumption of cold box power consumption is reduced, the cold box is controlled by the cold box frequency conversion power supply, the operation frequency can be adjusted according to the requirement, the energy saving and energy efficiency are higher, the energy storage system can store energy in advance, the electric energy is released less from the power grid in the period of higher electricity price, the peak time power consumption is reduced, the cold box power consumption cost is reduced, and the technical problem that the energy consumption of the container cold box is higher after being stored in the cold box special storage yard is solved. BRIEF DESCRIPTION OF DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.
[0012] Figure 1 A schematic view of an energy-saving and cost-reducing system of a cold box provided by the embodiments of the present application is shown in the figure.
[0013] Figure 2 A schematic view of an energy storage system provided by the embodiments of the present application is shown in the figure.
[0014] In the figure: 10, an energy-saving system of a cold box; 11, a cold box rack switch cabinet; 12, a cold box frequency conversion power supply; 13, a cold box electric box; 14, a cold box socket group; 20, a cost-reducing system of a cold box; 21, an energy storage system switch cabinet; 22, an energy storage system; 221, an energy storage management system; 222, a battery system; 223, a current collection system; 224, an energy storage converter; 225, a monitoring system; 226, a fire control system; 227, a temperature control system; 30, an intelligent transformer. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.
[0016] Figure 1 A schematic view of an energy-saving and cost-reducing system of a cold box provided by the embodiments of the present application is shown in the figure. As shown in the figure, Figure 1 the system comprises: an energy-saving system of a cold box 10 and a cost-reducing system of a cold box 20; the energy-saving system of a cold box 10 and the cost-reducing system of a cold box 20 are connected to the secondary side of the same intelligent transformer 30.
[0017] Specifically, the energy-saving system of a cold box 10 comprises a cold box rack switch cabinet 11 and a cold box frequency conversion power supply 12; the input end of the cold box rack switch cabinet 11 is connected to the output end of the intelligent transformer 30, the input end of the cold box frequency conversion power supply 12 is connected to the output end of the cold box rack switch cabinet 11, and the output end of the cold box frequency conversion power supply 12 is connected to the cold box electric box 13, and the cold box electric box 13 is connected to a container cold box; wherein the container cold box comprises a refrigeration container and / or a refrigeration container.
[0018] Specifically, as shown in the figure, Figure 1As shown, the cold box cost reduction system 20 comprises an energy storage system switch cabinet 21 and an energy storage system 22; the input end of the energy storage system switch cabinet 21 is connected with the secondary side power supply bus 31 of the intelligent transformer 30, and the output end of the energy storage system switch cabinet 21 is connected with the energy storage system 22.
[0019] Specifically, the intelligent transformer 30 is used for voltage reduction and transformation of the mains high voltage, and monitoring of the mains supply parameters and power quality.
[0020] Optionally, the intelligent transformer 30 is also used for monitoring of its own state.
[0021] In an optional embodiment provided by the utility model, the intelligent transformer 30 is used for converting the 10KV incoming line voltage into 380V 50Hz AC voltage.
[0022] Specifically, the cold box rack switch cabinet 11 is used for controlling the on-off between the cold box frequency converter 12 and the secondary side power supply bus 31 of the intelligent transformer 30.
[0023] The cold box frequency converter 12 is used for converting the power frequency mains into power of a preset frequency. Preferably, the preset frequency includes 40Hz-50Hz.
[0024] In an optional embodiment provided by the utility model, the cold box frequency converter 12 converts 380V 50Hz AC voltage into 380V 40Hz-50Hz AC voltage for use by the cold box 13.
[0025] Specifically, the main energy-consuming component of the container cold box in the prior art is a fixed-frequency compressor, which is driven by a fixed-frequency motor to work. When the temperature in the cold box reaches the set temperature, the compressor stops working, and when the temperature in the cold box rises, the compressor starts again. This working mode causes certain fluctuations in the temperature control of the cold box, because the frequent switching of the compressor causes the temperature in the cold box to fluctuate. The cold box frequency converter 12 used in the utility model embodiment can adjust the operating frequency as needed, which is more energy-efficient.
[0026] Specifically, the energy storage system switch cabinet 21 is used for controlling the on-off between the energy storage system 22 and the secondary side power supply bus 31 of the intelligent transformer 30.
[0027] The energy storage system 22 is used for energy storage and grid-connected power supply to the secondary side power supply bus 31 of the intelligent transformer 30.
[0028] In an optional implementation provided by the embodiment of the utility model, in order to achieve the purpose of energy saving and cost reduction, the energy storage system 22 is used to store energy during the valley period or the flat period of power consumption, and is used to supply power to the secondary side power bus 31 of the intelligent transformer 30 during the peak period of power consumption.
[0029] Preferably, as Figure 1 Indicated, the number of cold box row switch cabinet 11 and cold box frequency power supply 12 is multiple, wherein one cold box row switch cabinet 11 is connected with one cold box frequency power supply 12.
[0030] Specifically, the output end of each cold box frequency power supply 12 is connected with one cold box electric box 13.
[0031] In an optional implementation provided by the embodiment of the utility model, as Figure 1 Indicated, the cold box electric box 13 is connected with the container cold box through the cold box socket group 14. Wherein, the cold box socket group 14 is provided with multiple cold box sockets, and the number of cold box sockets of each cold box socket group 14 can be configured with different numbers according to actual production needs.
[0032] Figure 2 It is a schematic view of an energy storage system according to the embodiment of the utility model. As Figure 2 Indicated, the energy storage system 22 includes: energy storage management system 221, battery system 222, current collection system 223, energy storage converter 224, monitoring system 225, fire fighting system 226 and temperature control system 227. Wherein, the current collection system 223 is connected with the energy storage system switch cabinet 21 through the energy storage converter 224, the current collection system 223 and the energy storage management system 221 are connected with the battery system 222 respectively, and the monitoring system 225, the fire fighting system 226 and the temperature control system 227 are connected with the energy storage management system 221 respectively.
[0033] Specifically, the energy storage management system 221 is used to monitor and manage the cold box cost reduction system 20;
[0034] The battery system 222 is used to store and release electric energy;
[0035] The current collection system 223 is used to collect and manage the electric energy of multiple battery groups in the battery system 222;
[0036] The energy storage converter 224 is used to synchronize and set the voltage and current of the secondary side power bus 31 of the intelligent transformer 30 and the battery system 222;
[0037] The monitoring system 225 is used to monitor the internal and external environment of the cold box cost reduction system 20;
[0038] A fire-fighting system 226 is configured to provide smoke and fire warning and emergency fire-fighting for the cold box energy-saving and cost-reducing system 20.
[0039] A temperature control system 227 is configured to perform thermal management for the battery system 222 and to monitor the ambient temperature of the energy storage system 22.
[0040] In an optional embodiment provided in the present application, the operation mode of the energy storage converter 224 includes a rectification mode and an inversion mode.
[0041] The rectification mode includes: real-time monitoring of the AC voltage, AC current and frequency of the secondary side power bus 31 of the intelligent transformer 30, and converting the AC power of the secondary side power bus 31 of the intelligent transformer 30 into DC power suitable for the battery system 222 to charge and store energy for the battery system 222, so as to ensure stable power supply to the bus system 223 and the battery system 222.
[0042] The inversion mode includes: real-time monitoring of the DC voltage and DC current of the bus system 223, and converting the DC power of the battery system 222 into AC power suitable for the secondary side power bus 31 of the intelligent transformer 30 to grid-connected power supply.
[0043] In an optional embodiment provided in the present application, the energy storage converter 224 converts the DC power into 380V 40HZ-50Hz AC power to grid-connected power supply for the secondary side power bus 31 of the intelligent transformer 30 in the discharging stage of the battery system 222, and converts the 380V 50Hz AC power of the secondary side power bus 31 of the intelligent transformer 30 into 600V or so DC power suitable for the battery system 222 to charge and store energy in the energy storage stage of the battery system 222.
[0044] As can be seen from the above description, the present application provides a cold box energy-saving and cost-reducing system, which is technically reformed and uses the cold box and the energy-saving and cost-reducing mode to reduce the power consumption of the cold box, and the energy storage system can utilize the difference between the peak and valley power prices of the commercial power to store energy during the period of low power price and release the electric energy to reduce the peak power consumption from the power grid during the period of high power price, thereby reducing the power consumption cost of the cold box.
[0045] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.
[0046] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.
Claims
1. A cold box energy saving and cost reducing system, characterized in that, The application relates to a cold box energy-saving system and a cold box cost-reducing system, which are connected to the secondary side of the same intelligent transformer. The cold box energy-saving system comprises a cold box row cabinet switch cabinet and a cold box frequency conversion power supply device; the input end of the cold box row cabinet switch cabinet is connected with the output end of the intelligent transformer; the input end of the cold box frequency conversion power supply device is connected with the output end of the cold box row cabinet switch cabinet; the output end of the cold box frequency conversion power supply device is connected with a cold box electric box; the cold box electric box is connected with a container cold box; the container cold box comprises a refrigeration container and / or a refrigeration container. The cold box cost-reducing system comprises an energy storage system switch cabinet and an energy storage system; the input end of the energy storage system switch cabinet is connected with the secondary side power supply bus of the intelligent transformer; the output end of the energy storage system switch cabinet is connected with the energy storage system. The intelligent transformer is used for reducing the voltage of commercial power and monitoring the power supply parameters and power quality of commercial power. The cold box frequency conversion power supply device is used for converting commercial power of a working frequency into power of a preset frequency. The energy storage system is used for storing energy and grid-connected power supply of the secondary side power supply bus of the intelligent transformer. The number of the cold box row cabinet switch cabinets and the cold box frequency conversion power supply devices is plural; one cold box row cabinet switch cabinet is connected with one cold box frequency conversion power supply device.
2. The cold box energy saving and cost reducing system according to claim 1, characterized in that: The output end of each cold box frequency conversion power supply device is connected with one cold box electric box. The cold box electric box is connected with the container cold box through a cold box socket group.
3. The cold box energy saving and cost reducing system according to claim 1, characterized in that: The energy storage system comprises an energy storage management system, a battery system, a current collection system, an energy storage converter, a monitoring system, a fire extinguishing system and a temperature control system.
4. The cold box energy saving and cost reducing system according to claim 1, characterized in that: The energy storage management system is used for monitoring and managing the cold box cost-reducing system. The battery system is used for storing and releasing electric energy. The current collection system is used for collecting and managing the electric energy of a plurality of battery groups in the battery system. The energy storage converter is used for synchronously setting the voltage and current of the secondary side power supply bus of the intelligent transformer and the battery system. The monitoring system is used for video monitoring the internal and external surrounding environment of the cold box cost-reducing system. The fire extinguishing system is used for smoke and fire early warning and emergency fire extinguishing of the cold box cost-reducing system. The temperature control system is used for thermal management of the battery system. The operation mode of the energy storage converter comprises a rectification mode and an inversion mode.
5. The cold box energy saving and cost reducing system according to claim 4, characterized in that: The rectification mode comprises monitoring the alternating voltage, alternating current and frequency of the secondary side power supply bus of the intelligent transformer in real time and converting the alternating current of the secondary side power supply bus of the intelligent transformer into direct current suitable for the battery system to charge and store energy in the battery system. The inversion mode comprises monitoring the direct current voltage and direct current of the current collection system in real time and converting the direct current of the battery system into alternating current suitable for the secondary side power supply bus of the intelligent transformer for grid-connected power supply. The preset frequency comprises 40Hz-50Hz.
6. The cold box energy saving and cost reducing system according to claim 1, characterized in that: