Device features
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 heat transfer coefficient measurement experimental device uses *r and water vapor as media and uses a water vapor-*r heat exchange system. It has accurate data measurement, ideal experimental results, and a high degree of automation.
4. The entire experimental device can choose to use smooth tubes or enhanced heat exchange tubes according to user requirements to compare the effects of the two heat exchange forms.
5. An industrialized automatic steam generator is used to provide the steam source, the condensate can be recovered, and the steam generator requires almost no water replenishment. The operation is simple, convenient and safer.
6. The steam generator is designed with a safety water seal to eliminate safety hazards caused by safety valve f*lure.
7. The entire system adopts standard industrial instrument control system, which can carry out experiments on chemical engineering principles . It is also a good platform for process automation and chemical testing instrument experiments.
Device function
1. The empirical correlation (Dittus-Boelter correlation) of forced convection heat transfer in a circular str*ght tube can be verified through experiments.
2. It can measure the steam condensation heat transfer coefficient and the total heat transfer coefficient outside the tube, and compare them with the heat transfer coefficient inside the tube.
3. The enhanced heat transfer coefficient of threaded pipes can be measured and compared with smooth pipes.
4. Ability to observe and analyze the condensation conditions of steam outside the tube and distinguish between dropwise condensation and film condensation.
5. The condensate can be recycled, minimizing the amount of distilled water added to the steam generator.
6. Full touch integrated control, highly stable data transmission, and hardware encryption.
basic configuration
1 steam generator, 1 sleeve heat exchanger, 1 condensate recovery device, 1 vortex *r pump, 1 orifice flow meter, and 1 pressure sensor .
public facilities
Water: The device comes with a 304 st*nless steel automatic steam generator, which is connected to tap water. Water vapor enters the heat exchanger during the experiment.
Electricity: voltage AC220V, power 4.0KW, standard single-phase three-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 vapor --- *r, external equipment: none.
Major equipment
1. Measuring flow range: 4-40m3/h. The Reynolds number Re in the tube ranges from 1.0 to 2.1×104, and the fitting accuracy R can reach 0.999; the Nusselt number Nu: 40-120, and the Praland number Pr: 0.7. Convection heat transfer coefficient αi: 50-200 W/m2·℃.
2. Each casing has four temperature measuring points that can simultaneously obt*n the calculated and measured values of the steam convective heat transfer coefficient outside the tube and the convective heat transfer coefficient inside the tube.
3. Ordinary casing heat exchanger: The inner casing (φ22x2mm) is: copper smooth tube; effective length 1200mm, high borosilicate sight glass, steam pipe φ76x4mm, external insulation.
4. Reinforced casing heat exchanger: The inner casing (φ22x2mm) is: copper bellows; effective length 1200mm, high borosilicate sight glass, steam pipe φ76x4mm, external insulation.
5. Vortex *r pump: wind pressure 20kPa, *r volume 150m3/h, 750W.
6. Steam generator: 304 sanitary st*nless steel, volume 20L, maximum pressure ≥0.5MPa, heating power 2*2.0KW. 2 sets of heating, 1 set fixed + 1 set adjustable; equipped with explosion-proof water seal and condensate recovery device. Eliminate safety hazards caused by safety valve f*lure.
7. Steam gas-liquid separator: 304 sanitary st*nless steel, capacity 5L, equipped with dr*n valve.
8. Pipeline: Made of 304 sanitary st*nless steel, st*nless steel quick-fitting unions are used to connect the pipes.
9. Valves: Use 304 st*nless steel valves and high-quality copper valves.
10. Temperature sensor: Pt100, 304 st*nless steel shell, display scale 0.1℃, digital display.
11. Orifice plate flowmeter, orifice plate throat diameter: Φ25mm, wind pressure sensor 0~10KPa.
12. Steam pressure measurement: pressure sensor, measurement range: 0-0.25MPa, accuracy level 0.5.
13. Condensate recovery device and exhaust pipe: 304 sanitary st*nless steel. Material: High borosilicate glass, transparent and visible.
14. Electrical appliances: contactors, switches, leakage protection *r switches.
15. Central processing unit: execution speed 0.64μs, memory capacity 16K, function: data processing operations.
16. Analog module: up to 16-bit resolution, sum accuracy ±0.5%, built-in RS485 communication mode.
17. Temperature module: resolution 0.1℃, accuracy 0.5%, built-in RS485 communication mode.
18. Use an all-in-one tablet touch computer to control the whole process with digital touch screen. HMI: Projected touch technology, 50 million touch points, 2G memory, function: central processor data display control.
19. Rated voltage: 380V, total power: 5kW.
20. Overall dimensions: 2000×580×1800mm (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.
21. Engineering signs: including equipment tags, pipeline flow direction arrows and logos, valve tags 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.
22\ Construction building and intelligent building electrical installation virtual simulation software
Based on the 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), and exercises (Built-in 6 multiple-choice questions, prompts for correct and incorrect choices), schematic diagram (can be entered into the device from the schematic diagram). 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: Show 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 and 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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