Experiment device for researching underground space top soil heat accumulation and release evolution laws

An experimental device and underground space technology, which is applied in the field of experimental devices for long-term heat storage and release characteristics, can solve problems such as difficult measurement of soil heat and humidity change parameters, and achieve the effects of overcoming impracticality, simplifying simulation devices, and direct effects

Inactive Publication Date: 2016-08-31
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to provide an experimental device for studying the evolution law of heat storage and release of soil at the top of the underground space. The numerical simulation is limited by the constraints of physical modeling and boundary condition setting, and the working condition of the device is easy to adjust, and the experimental data can be easily obtained, which greatly reproduces the outdoor and indoor periodic temperature boundaries of the soil on the top of the underground space. Evolution law of heat storage and release under conditions

Method used

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  • Experiment device for researching underground space top soil heat accumulation and release evolution laws
  • Experiment device for researching underground space top soil heat accumulation and release evolution laws
  • Experiment device for researching underground space top soil heat accumulation and release evolution laws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0044] Example: working conditions when the wind speed near the wall is small

[0045] Such as figure 1 In the constant temperature and humidity air-conditioning room, the constant temperature and humidity air enters from the fan side of the thermal environment simulation duct 1, passes through the frequency conversion fan 1-1, heater 1-2, and humidifier 1-3 in turn, and enters the soil and the outdoor environment. The heat and humidity exchange area is discharged to the indoor air outlet through the outlet of the thermal environment simulation air duct 1; the air-conditioning box in the constant temperature and humidity room can ensure the lower air temperature and air humidity regulation at the same time, and the heater 1-2 can provide higher air temperature. The air temperature, the humidifier 1-3 can further adjust the air humidity, and the frequency conversion fan 1-1 can adjust the airflow speed; figure 2 Open the cut-off valve 2-4 in the middle spray device 2, turn on...

Embodiment 2

[0059] Example 2: Working condition when the wind speed near the wall is relatively high

[0060] Carry out following working condition adjustment according to embodiment 1:

[0061]When the wind speed near the wall is high, the air inside the wall of the underground space is forced to flow, and the temperature difference is kept constant, according to the Nusselt criterion number Nu=0.664Re under the condition of the swept flat plate 1 / 2 ·Pr 1 / 3 (Re Reynolds criterion number, dimensionless number; Pr Prandtl criterion number, dimensionless number.) and geometric ratio to determine the flow velocity ratio, the conversion of underground space and constant temperature water bath flow velocity conversion is shown in Table 3.

[0062] Table 3 Correspondence between underground space and constant temperature water bath flow rate conversion

[0063]

[0064] Note: Except for the above adjustments, other principles and implementation processes are the same as in Embodiment 1.

...

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Abstract

The invention relates to an experiment device for researching underground space top soil heat accumulation and release evolution laws. The device is composed of an outdoor environment parameter simulation device, a soil heat and humidity coupling experiment device and an experiment rack. The outdoor environment parameter simulation device is composed of an air heat environment simulation air pipe, a spraying device, a temperature probe, a humidity probe and an air temperature and humidity control cabinet. The soil heat and humidity coupling experiment device is composed of heat transfer soil, a soil temperature measuring point, a soil moisture content measuring point, a heat flux measuring point, a soil parameter concentrated display instrument, a constant-temperature water bathing plate, a water bathing temperature measuring point, a water bathing speed measuring point, a water pump, a constant-temperature water bathing control cabinet and a drying agent groove. All the parts are arranged on the experiment rack C. By means of the device, the constant-temperature water bathing flow speed and temperature can be easily and conveniently changed, outdoor environment periodic change is carried out, vertical experiment soil block parameters are changed, and through dynamic analysis, the long-term heat accumulation and release characteristics of soil on the top in an underground space building envelope under the indoor and outdoor periodic temperature and humidity boundary condition are given.

Description

technical field [0001] The invention relates to an experimental device for researching the thermal environment of an underground space building, in particular to an experimental device for long-term heat storage and release characteristics of top soil in an underground space enclosure structure under indoor and outdoor periodic temperature and humidity boundary conditions. Background technique [0002] Underground space is an important part of modern cities. At present, the construction area of ​​underground space continues to increase, and the building functions continue to increase. In the thermal environment of underground buildings such as bookstores, restaurants, and subways, there are problems of heat storage and release of enclosure structures. It is known that the heat storage and release of the enclosure structure has the following effects on the indoor thermal environment. One is the self-balancing adjustment of indoor air temperature and humidity, which not only af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20G01N25/18
CPCG01N25/18G01N25/20
Inventor 王丽慧刘畅邹学成杜志萍郑懿倪丹李勇
Owner UNIV OF SHANGHAI FOR SCI & TECH
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