DYLR-YS Refrigeration Compressor Performance Test Experimental Platform
Release time：2024-06-19 01:00viewed：times
The " Refrigeration Compressor Performance Test Tr*ning Device" is equipped with fully enclosed refrigeration compressors, condensers, evaporators and other real refrigeration system components, and is equipped with intelligent temperature regulators, flow meters, pressure gauges, voltmeters, ammeters and other measuring instruments. It can not only provide tr*ning on the measurement of refrigeration compressor performance parameters, but also demonstrate the basic principles of refrigeration cycles. It is suitable for teaching and tr*ning related courses in refrigeration majors in vocational colleges.
I. Device features
1. This tr*ning device is established in accordance with the international standard GB/T 5773-2004 volumetric refrigeration compressor performance tr*ning method, with the "evaporator liquid refrigerant circulation method" as the m*n measurement and the "water-cooled condenser calorimeter method" as the auxiliary measurement
2. A 1-horsepower refrigeration unit is used, and both the condenser and evaporator are shell-and-tube water heat exchangers. The system has a compact structure, reasonable layout, and beautiful appearance. II
. 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: <2.5kVA
4. Refrigerant: R22
5. Cooling capacity: 1.3kW
6. Weight: 100kg
7. Dimensions: 120cm×60cm×142cm
III. Basic configuration and functions
1. Control
panel It adopts a double-layer matte dense-gr*ned spray-p*nted structure with a novel shape. The refrigeration system is arranged on the top layer, which can intuitively display the refrigeration system structure; the front is equipped with a power control and measuring instrument function panel. The bottom is equipped with four universal wheels with brakes for easy movement and fixing.
2. Refrigeration system
1 fully enclosed compressor, horizontal shell and tube condenser, sight glass, dry filter, manual throttle valve, liquid storage tank and dry evaporator
3. Circulating water system
(3) 2 water pumps
The m*n technical parameters are:
rated power: 95W
rated head: 6m
rated flow: 1.08 cubic meters/hour
(4) 1 water tank
Made of st*nless steel material, respectively, condenser circulating water tank and evaporator circulating water tank
(5) 1 heater (power 1000W)
The output power can be adjusted by a potentiometer and is used to heat the evaporator circulating water
5. Measuring instrument
(5) 2 power meters (accuracy 0.5 level)
to measure the heating power and compressor power respectively. Through key control and digital display window, the intelligent control mode of human-computer dialogue can be realized, and the active power, reactive power, power factor, voltage, current, frequency and properties of the load can be measured; and 15 groups of power and power factor test data can be stored and queried.
(6) 1 digital display thermometer (accuracy 0.5 level)
uses PT100 platinum resistance as sensor , with a measurement range of -50～150℃. Switching through the keyboard, a total of 8 groups of temperature parameters are measured, namely compressor suction port temperature, compressor exhaust port temperature, condenser outlet temperature, evaporator inlet temperature, condenser water inlet temperature, condenser water outlet temperature, evaporator water inlet temperature and evaporator water outlet temperature
(7) 2 vacuum pressure gauges (accuracy 2.5 level)
with a range of -0.1~1.5MPa and -0.1~3.5MPa, respectively measuring the low-pressure side pressure and high-pressure side pressure of the refrigeration system in real time
(8) 2 flow meters (accuracy 0.5 level)
using glass rotor flow meters with a range of 16~160ml/min, respectively measuring the cooling water flow of the condenser and evaporator
6. Control instrument
1 high and low pressure controller: real-time monitoring of the low-pressure side pressure and high-pressure side pressure of the refrigeration system. When the high pressure is higher than the set value or the low pressure is lower than the set value, the controller sends a control signal to cut off the power supply of the compressor
7. 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 3D machine model can be operated through the start/stop, forward motion, and reverse motion buttons . When the line is connected, the 3D machine 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 into the electrical cabinet. The limiter is placed on the 3D machine 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 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 the relay control, with the addition of PLC control function. After the connection is completed, press the PLC coding button to enter the program writing interface, write two programs, forward and reverse, with a total of 12 ladder diagram symbols. After writing, select Submit to verify the program. After successful verification, turn on the power to operate. If there is a component, line connection, or code error, an error box will pop up, and the scene can be reset at any time.
3. MicrocontrollerControl: The experiment is the same as relay control, with the microcontroller control function added. After the connection is completed, enter the programming interface through the C coding button, enter the correct C language code, submit the verification successfully, turn on the power to operate, and a prompt error box will pop up for component, line connection, and code errors. The scene can be reset at any time.
4. Practical tr*ning projects
1. Familiar with the basic structure and working principle of the vapor compression refrigeration cycle system
2. Understand the performance and use of the international standard GB/T5773-2004 positive displacement refrigeration compressor
3. Use the evaporator liquid refrigerant circulation method (m*n measurement method) to calculate the refrigeration capacity of the refrigeration compressor
4. Use the water-cooled condenser heat balance method (auxiliary measurement method) to calculate the refrigeration capacity of the refrigeration compressor
5. Calculation and analysis of the relative error of the m*n and auxiliary measurement refrigeration capacity
6. Calculation and analysis of the energy efficiency ratio of the refrigeration unit
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