DYLR-528 Cold Storage Air Conditioning Refrigeration Experimental Platform
Release time：2024-06-18 20:30viewed：times
1. Overview
Ice storage *r conditioning uses low-load electricity at night to make ice and store it in the ice storage device. During the day, the ice is melted to release the stored cold, reducing the *r conditioning power load and *r conditioning system installed capacity during the peak period of the power grid. It represents the development direction of central *r conditioning in the world today. This tr*ning device is a new type of tr*ning equipment developed and designed based on the practical teaching of courses such as "Principles, Engineering Design and Application of Cold Storage Air Conditioning System" and "Energy Storage Air Conditioning Technology and Its Development". The entire device adopts a direct evaporation ice making system. The system is m*nly composed of a refrigeration unit, an ice storage device, an *r conditioning terminal device, an *r conditioning circulating water pump, an ethylene glycol pump, and a coolant (ethylene glycol aqueous solution). It is suitable for practical tr*ning and teaching of courses related to *r conditioning engineering, building
environment and equipment engineering in various colleges and universities. 2. Features
1. This device uses real cold storage *r conditioning components on industrial sites, which is in line with actual applications;
2. The cold storage *r conditioning system can be composed of three operating conditions: cold storage operation, cold supply operation and conventional *r conditioning operation;
3. This device organically combines direct evaporation ice storage, ice melting in refrigerant and large temperature difference supercooling.
4. The system has a simple and compact structure, convenient cold storage and cold extraction, and flexible and effective control.
III. Technical performance
1. Input power: single-phase three-wire ~ 220V ± 10% 50Hz
2. Working environment: temperature -10℃ ~ +40℃; relative humidity <85% (25℃); altitude <4000m
3. Device capacity: <4kVA
4. Refrigerant: R134a
5. Coolant: ethylene glycol aqueous solution
6. Safety protection: equipped with current type leakage protection and grounding protection, safety meets national standards
IV. System configuration
1. Tr*ning table : st*nless steel structure, clear and compact structure.
2. Control cabinet: iron double-layer matte dense spray structure, solid structure. The front door adopts a transparent design, and control components such as the central controller ( PLC host), contactor, thermal protector, etc. can be observed. There are m*n power control switch, voltmeter, ammeter, manual knob switch, working status indicator light, system flow chart and PLC host unit on the panel.
3. AC power supply control: three-phase four-wire AC380V power supply, and a leakage protector is provided to control the total power supply of the control panel.
4. Control system: The control system is composed of electrical control, PLC programmable controller, and computer configuration monitoring.
5. Basic components of the system: m*nly composed of refrigeration unit, ice storage device, ethylene glycol pump, solenoid valve, plate heat exchanger, *r conditioning terminal device, *r conditioning circulating water pump, ethylene glycol pump, refrigerant (ethylene glycol aqueous solution), etc.
6. Power supply voltage indication: provide system power grid monitoring AC voltmeter, AC ammeter, refrigeration unit operation AC ammeter, etc.
7. Refrigeration system pressure indication: provide 2 vacuum pressure gauges and 1 double group pressure controller, the measurement range is -0.1~1.5MPa, -0.1~3.5MPa, respectively, which can display the pressure changes on the low pressure side and high pressure side when the system is working; it plays a protective role on the compressor.
8. Single-chip microcomputer , PLC programmable design and control virtual simulation software:
This software is developed based on Unity3D, with built-in experimental steps, experimental instructions, circuit diagrams, component lists, connection lines, power on, circuit diagrams, scene reset, return and other buttons. After the connection and code are correct, the three-dimensional machine tool model can be operated through the start/stop, forward movement, and reverse movement buttons . When the line is connected, the three-dimensional machine tool model can be enlarged/reduced and translated.
1. Relay control: Read the experimental instructions and enter the experiment. By reading the circuit diagram, select relays, thermal relays, switches and other components in the component list and drag and drop them to the electrical cabinet. The limiter is placed on the three-dimensional machine tool model. You can choose to cover the cover. Some component names can be renamed. Then click the connection line button to connect the terminals to the terminals. After the machine tool circuit is successfully connected, choose to turn on the power and operate. If the component or line connection is wrong, an error box will pop up, and the scene can be reset at any time.
2.PLC control: The experiment is the same as relay control, with the addition of PLC control function. After the connection is completed, enter the program writing interface through the PLC coding button, write two programs, forward and reverse, with a total of 12 ladder diagram symbols. After the writing is completed, select Submit to verify the program. After successful verification, turn on the power to operate. Error boxes will pop up for components, line connections, and code errors, and the scene can be reset at any time.
3. Single-chip microcomputer control: The experiment is the same as relay control, with the addition of single-chip microcomputer control function. After the connection is completed, enter the programming interface through the C coding button, enter the correct C language code, and submit after successful verification. Turn on the power to operate. Error boxes will pop up for components, line connections, and code errors, and the scene can be reset at any time.
V. Tr*ning projects
1. Structure and working principle of cold storage *r conditioning system
2. Start-up, operation and debugging of
cold storage *r conditioning 3. Recording of cold storage *r conditioning operation status and detection of operating parameters
4. Control process and control principle of cold storage *r conditioning
5. Programming, debugging and application of programmable controllers
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