DYHGYL-21 liquid-Solid Heat Exchange Comprehensive Training Platform
Release time：2024-06-08 04:00viewed：times
Features of the device
1. The entire device is beautiful and elegant, with reasonable structural design, strong sense of integrity, and a strong sense of engineering, which can fully embody the concept of a modern laboratory .
2. The entire equipment is a self-propelled frame structure and is equipped with restr*ning feet to facilitate the disassembly, m*ntenance and transportation of the system.
3. This device chooses to use ordinary heat exchangers and tube heat exchange tubes to compare the effects of the two heat exchange forms, and adopts the partition wall heat exchange method for heat exchange.
4. The design of the m*n and auxiliary circuits of double water pumps, the fresh water supplement and waste hot water circulation design, and the countercurrent and parallel flow heat exchange process switching are closer to the actual industrial application.
5. Adopt multiple sets of heating tube preheating system, the heating speed is fast and uniform, the preheater voltage is adjusted, platinum thermal resistor + thyristor + heating tube are used as the m*n control method of the thermal fluid temperature.
6. Both hot and cold water tanks are sealed with lids and are equipped with a water level height display device to facilitate observation of water level changes, and have water up and down functions; the water level of the cold water tank can be automatically controlled.
7. The device design allows for 360-degree observation, enabling all-round teaching and experimentation.
Device functions
1. Master the measurement method of casing convective heat transfer coefficient, deepen the understanding of its concepts and influencing factors, and apply the linear regression method to determine the values of the constants A and m in the correlation expression.
2. Master the method of measuring the heat transfer coefficient Ko of tubes.
3. Full touch integrated control, highly stable data transmission, and hardware encryption.
Basic configuration liquid flow: 0.16-1.6 m3/h, temperature: normal temperature -60℃, normal pressure operation.
Reynolds number Re: 104-5*104, Nusselt number Nu: 40-120, Praland number Pr: 0.7.
Convective heat transfer coefficient αi: 500-1500 W/m2·℃.
Utilities
Water: The device comes with a 304 st*nless steel automatic steam generator, which is connected to tap water. During the experiment, water vapor enters the heat exchanger.
Electricity: voltage AC220V, power 4.0kW, standard three-phase four-wire system. Each laboratory needs to be equipped with 1~2 grounding points (safety ground and signal ground).
Air: Air comes from the fan (self-cont*ned *r source).
Experimental materials: water, external equipment: none.
M*n equipment
1. Casing heat exchanger: inner tube inner diameter d=18mm, inner tube outer diameter De=20mm (purple copper tube). The inner diameter of the outer pipe is d=52mm, the outer diameter of the outer pipe is De=57mm (304 st*nless steel pipe), and the pipe length is 1100mm.
2. Tube heat exchanger: hot fluid flows inside the tubes, and cold fluid flows between the tubes. The heat exchange tube specification is Ф12×1.5 mm, 13 in total, 1000mm long.
3. Hot water pump: 304 st*nless steel centrifugal pump: power 370W, maximum flow 3m3/h.
4. Cold water pump: 304 st*nless steel centrifugal pump: power 370W, maximum flow 3m3/h.
5. Cold and hot water flow: DN12 turbine flowmeter, flow range 0.1~2.0 m3/h, 4-20mA remote transmission output, flow detection mechanism .
6. Heating water tank: made of 304 st*nless steel, with a capacity of 70L, with a water storage and emptying bottom valve, equipped with a liquid level display device, and a built-in st*nless steel heater: heating power 3.0KW.
7. Cold water tank: made of 304 st*nless steel, with a capacity of 90L, equipped with a water storage and emptying bottom valve, and equipped with a liquid level display device; and equipped with a float valve at the entrance of the cold water tank to ensure a constant water level in the water tank.
8. Hot fluid inlet and outlet pipe: 304 st*nless steel, DN15, with insulation layer.
9. Pipeline: Made of 304 sanitary st*nless steel, st*nless steel quick-installation is used to connect to the pipeline.
10. Valves: Use 304 st*nless steel valves and high-quality copper valves.
11. Temperature sensor : Pt100, 304 st*nless steel shell, display graduation 0.1°C.
12. Electrical appliances: contactors, switches, leakage protection *r switches.
13. Central processing unit: execution speed 0.64μs, memory capacity 16K, function: data processing operations.
14. Analog module: up to 16-bit resolution, sum accuracy ±0.5%, built-in RS485 communication mode.
15. Temperature module: resolution 0.1℃, accuracy 0.5%, built-in RS485 communication mode.
16. Display terminal: It adopts an all-in-one tablet touch computer and the entire digital touch screen control operation. HMI: Projected touch technology, 50 million touch points, 4G memory, function: central processor data display control.
17. Dimensions: 2000×550×1800mm (length×width×height), movable design, with brake wheels, high-quality aluminum alloy profile frame, no welding points, easy installation and disassembly, horizontally adjustable support casters.
18. Engineering signs: including equipment tags, pipeline flow direction arrows and logos, valve tag numbers and other engineering equipment concepts, including safety warning signs, so that students can be in a safe experimental operating environment and learn to recognize engineering pipeline signs. knowledge and cultivate students’ engineering concepts.
19. The supporting measurement and control software can realize real-time online collection and display of experimental data, curves and equipment operating status. Terminal coverage is achieved through WIFI technology.
20. Virtual simulation software for electrical installation of building buildings and smart buildings. Based on unity3d design, users can choose different interactive interface sizes according to computer configuration, and six levels of image quality are av*lable. The model in the software can be rotated 360°, enlarged, reduced, and translated. There are assistant prompts during the use of the software, and the content is as follows: A. Wet alarm system 1. System overview: Overview of wet alarm system
2. Equipment awareness: equipped with the best viewing angle, equipment det*ls (displaying the introduction or parameters of the equipment), exercises (built-in 6 multiple-choice questions, prompts for correct and incorrect choices), schematic diagram (can be entered from the schematic diagram) into the device). Equipment includes: nozzle, water flow indicator, signal butterfly valve, exhaust valve, fire alarm control, high pipe pressure gauge, high water tank, Wia control cabinet, pressure stabilizing tank, flow switch, terminal water testing device, dr*nage facilities, water pump connection alarms, hydraulic alarms, delayers, wet alarms, butterfly valves, check valves, fire pumps, safety pressure regulators, and fire pools.
3. Principle display: Show the working principle of the wet alarm system, three-dimensional animation demonstration, the three-dimensional model is translucent, and the internal water flow can be seen. Equipped with a practice module (built-in 4 multiple-choice questions, with prompts for correct and incorrect choices)
4. Design layout: There are multiple-choice questions and calculation questions, each question is scored, and the correct answer and score will be displayed after submission
B. Gas fire extinguishing system
1. System overview: Overview of gas fire extinguishing system
2. Equipment awareness: equipped with the best viewing angle, equipment det*ls (displaying the introduction or parameters of the equipment), exercises (built-in 8 multiple-choice questions, with prompts for correct and incorrect choices), Schematic diagram (access to the device from the schematic diagram). Equipment includes: nozzle, HFC-227 storage bottle, bottle head valve, heptafluoropropane one-way valve, high-pressure hose, gas one-way valve, safety valve, weighing alarm, electromagnetic starter, selection valve, smoke alarm, fire Alarm controller.
3. Principle display: Demonstrate the working principle of the gas fire extinguishing system, three-dimensional animation demonstration, the three-dimensional model is translucent, and the internal gas can be seen. Equipped with a practice module (built-in 3 multiple-choice questions, with prompts for both correct and incorrect choices)
4. Design layout: There are 6 multiple-choice questions, each question is scored, and the correct answer and score will be displayed after submission.
C. Escape drill: adopted Teaching is conducted in the form of fun games. Escape from the burning room within a limited time. If you make a wrong choice, you will directly enter the score interface.
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