dyHGRG-62 Training device for measuring local heat transfer coefficient when air passes over a flat plate
Release time：2024-06-11 02:30viewed：times
1. Purpose of the experiment
1. Determine the heat release coefficient when the *r sweeps across the surface of the flat plate;
2. Organize the experimental data into a criterion equation based on the similar analysis of the heat release process of forced motion.
2. Technical indicators
1. Electroplated copper flat plate test piece specifications: δ = 0.1 mm, length 280 mm, width 190 mm, surface blackness ε = 0.2, thermal conductivity λ = 15 (W/m℃);
2. Electroplated copper flat plate test piece Heater power supply: AC220V, rated current 5A, electric heating power: ≤500W;
3. Digital display voltmeter: AC220V, accuracy level 0.2;
4. Digital display ammeter: range 5A, accuracy level 0.2.
5. Electroplated copper flat plate temperature test sensor .
6. Temperature measurement: -55～+127℃, accuracy: ±0.2FS;
7. Inclined tube micromanometer; requirements: 0～1000Pa, accuracy: 0.25 level
8. Multi-wing low-noise fan: full pressure 450～350Pa ,
*r volume 1300~3300m3/h, speed 1450r/min.
9. Operation at normal temperature and pressure, working power supply: three-phase five-wire 380V±10%, 50Hz, power 500W; safety protection: with grounding protection, leakage protection, overcurrent protection;
10. Installation of power lines and control lines: Environmentally friendly flame -retardant electrical wiring ducts must be used , and the arrangement must comply with national standards. It has the characteristics of insulation, arc prevention, flame-retardant self-extinguishing, etc. The wiring is neat and the installation is reliable, making it easy to find, rep*r and replace lines;
11. Appearance dimensions of the device: 2200×450×1500mm.
12. 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 can choose from six image quality levels. 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 a fun game. Escape from the burning room within a limited time. If you make a wrong choice, you will directly enter the score interface.
3. M*n configuration and parameters
1. Experimental plexiglass wind tunnel, low-noise forward multi-wing fan, micrometer, mobile Detection slide, inclined tube micromanometer, heater, flat test piece, temperature sensor, temperature measurement inspection instrument, digital ammeter, digital voltmeter, temperature regulation module, special probe for boundary layer, speed measurement pitot tube; Power control system.
2. St*nless steel frame experimental bench (casters are universal wheels with locking feet)
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