Wall-roof type solar chimney experimental device

A technology of solar chimneys and experimental devices, applied in the field of solar chimneys and natural ventilation, can solve the problems of lack of research data, inability to study wall-roof solar chimneys, etc., and achieve the effect of a large experimental range

Inactive Publication Date: 2012-07-25
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In order to solve the problem of lack of relevant experimental research data for wall-roof solar chimneys, a convenient and flexible wall-roof solar chimney

Method used

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  • Wall-roof type solar chimney experimental device
  • Wall-roof type solar chimney experimental device
  • Wall-roof type solar chimney experimental device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: Simulate the influence of the inclination angle of the inclined surface on the velocity field, temperature field and natural ventilation inside the solar chimney.

[0042] Such as figure 1 As shown, the test bench box is 1m long, 1m wide, and 1.1m high. The solar chimney is connected by two sections, an inclined section and a vertical section. Side wall 7), a heating wall (inclined section heating wall 1 and vertical section heating wall 6) and a moving wall surface 11, wherein the height of the inclined surface is 0.5m, the height of the vertical surface is 1m, and the length is 1m; the chimney inlet 12 Length 1m, width 0.1m. The side walls of the two sections of the chimney are respectively connected by a fan-shaped piece 4 with an included angle α (30°, 45° and 60°), the two heating walls are sealed and connected with a heat-insulating fireproof cloth 5, and the moving wall 11 is a whole piece A thin aluminum plate is inserted along the flange groove ...

Embodiment 2

[0046] Embodiment 2: Simulate the influence of different widths on the velocity field, temperature field and natural ventilation inside the solar chimney. The structure of the device used is the same as that of the device in Example 1.

[0047] According to the required simulated scene, the heat flux of the vertical heating wall 6 is set by adjusting the rheostat 18; the heat flux of the inclined heating wall 1 is set by adjusting the rheostat 21; by determining the size of the sector 4, the inclination is set Face Slope Dimensions. The movable wall 11 is installed in the position of the No. 1 notch of the flange groove 8 to complete the setting of the chimney width.

[0048] Place the smoking device 9 in the middle of the test box 10 . Connect the thermocouple 13 with the temperature acquisition instrument, place the wind speed measurement device at the required measurement position (generally each state point in the air duct), and finally turn on the power supply 17 to sta...

Embodiment 3

[0049] Embodiment 3: Simulate the influence of different heat flux densities on the velocity field, temperature field and natural ventilation inside the solar chimney. The structure of the device used is the same as that of the device in Example 1.

[0050] According to the scene to be simulated, by determining the size of the sector 4, the inclination size of the inclined surface is set; by determining the position of the flange groove 8 where the moving wall 11 is located, the required chimney width is set.

[0051] Adjust the connection method of the electric heating plate in the chimney according to the heat flux density to be measured (such as Figure 4 , Figure 5 shown) for rough heating power. Adjust the resistance values ​​of the sliding rheostats 18 and 21 of the external circuit to achieve more accurate heating power setting.

[0052] Place the smoking device 9 in the middle of the test box 10 . Connect the thermocouple 13 with the temperature acquisition instru...

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Abstract

The invention discloses a wall-roof type solar chimney experimental device, which relates to the fields of solar chimney and natural ventilation. The wall-roof type solar chimney experimental device comprises a model room (10) and the solar chimney, wherein an opening at one side of the model room (10) is connected with a solar chimney channel; the other side of the model room (10) is provided with an air inlet (24); a smoke generation device (9) is arranged in the model room (10); the solar chimney is composed of a vertical-section pipe section and an inclined-section pipe section; the vertical-section pipe section is composed of a vertical-section heating wall (6), vertical section side walls (7), flange grooves (8) and a movable wall (11), wherein two sides of the vertical-section heating wall (6) are fixedly connected with the vertical section side walls (7); the opposite surfaces of the vertical section side walls (7) at the two sides are provided with three flange grooves (8); and the movable wall (11) is inserted into any one of the three flange grooves to form a sealed chimney environment without cross sections. The wall-roof type solar chimney experimental device is provided with a width regulation device to regulate the width of the solar chimney so as to simulate the ventilation effect of the solar chimney under different widths.

Description

technical field [0001] The present invention designs a kind of solar chimney experimental device, especially relates to wall-roof type solar chimney experimental device, can analyze the influence of flow field, velocity field and temperature field of solar chimney by changing structure size, angle and heat flow size, The invention relates to the fields of solar chimneys and natural ventilation. Background technique [0002] The solar chimney is a structural device that increases the temperature difference between the inside and outside of the chimney by absorbing solar radiation heat, increases the buoyancy effect, and finally achieves the purpose of increasing the indoor ventilation air volume to reduce the room temperature. [0003] Experimental research on solar chimneys began in the 1950s, and domestic and foreign researchers conducted a large number of experiments and numerical simulations on solar chimneys. At present, the structural forms of solar chimneys that have ...

Claims

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Application Information

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IPC IPC(8): G01M9/00
Inventor 李炎锋王代兵边江张泽园吴竟熙王慧琛
Owner BEIJING UNIV OF TECH
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