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Underground concrete impounding reservoir heat preservation method

A water storage tank and concrete technology, applied in the field of construction, can solve the problems of waste of production materials, unsatisfactory heat preservation effect, etc., and achieve the effect of widening the use area, avoiding waste, and saving land

Active Publication Date: 2018-01-05
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems of waste of production materials or unsatisfactory heat preservation effect existing in the prior art by providing a heat preservation method for an underground concrete storage tank:

Method used

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  • Underground concrete impounding reservoir heat preservation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The climate division of Chengdu is in the hot summer and cold winter area, the annual extreme minimum temperature is -5.9°C, the water temperature in the pool is usually 5°C, and the effective volume of the reservoir is 1000m³ (dimensions are 15.9m×15.9m×4m); the pool wall is thick 250mm, the water storage time is 48 hours; without any heat preservation, the surrounding of the pool and the top of the pool in the pool will dissipate heat to the surrounding environment;

[0058] (1) Calculate the maximum allowable heat loss , where t 2 =5°C, t 1 =0℃, C=4.187kJ / kg·℃, M=1000m³×1000×1.0kg / L=1.0×10 6 kg, the maximum allowable heat loss =4.187kJ / kg·℃×1.0×10 6 kg×(5-0)°C=2.1×10 7 j

[0059] (2) Calculate the average hourly maximum heat loss within the water storage time: =2.1×10 7 kJ / 48h=4.35×10 5 kJ / h;

[0060] (3) Calculate the maximum allowable heat transfer coefficient: where q=Q 平 / 3.6=1.2×10 5 kW; The surface area of ​​the 1000m³ pool roof and the surroun...

Embodiment 2

[0072] Lanzhou City, Gansu Province is located in Zone A of the cold region, the annual extreme minimum temperature is -21.7°C, the water temperature in the pool is usually 5°C, and the effective volume of the reservoir is 1000m³ (dimensions are 15.9m×15.9m×4m); the wall thickness of the pool is 250mm , water storage time 48h;

[0073] The calculation process is the same as in Example 1, and it can be concluded that the actual heat transfer coefficient K' (8.1kW / ㎡·℃) > the maximum allowable heat transfer coefficient K (5.92kW / ㎡·℃);

[0074] In the selection of thermal insulation materials, in line with the range of K<K'<2K, the thermal insulation materials should be 0~60mm thick extruded polystyrene board or 0~80mm rock wool board;

Embodiment 3

[0076] Xilinhot City, Inner Mongolia is located in Zone B, a severe cold area. The annual extreme minimum temperature is -38°C, and the water temperature in the pool is usually 5°C. The effective volume of the reservoir is 1000m³ (dimensions are 15.9m×15.9m×4m); the wall thickness of the pool is 250mm, Water storage time 48h;

[0077] The calculation process is the same as in Example 1, and it can be concluded that the actual heat transfer coefficient K' (8.1kW / ㎡·℃) > the maximum allowable heat transfer coefficient K (3.68kW / ㎡·℃);

[0078]In the selection of insulation materials, it is in line with the range of 2K<K'<3K, and the insulation materials are 60~120mm thick extruded polystyrene board or 80~160mm rock wool board.

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Abstract

The invention belongs to the field of buildings and water storage, and particularly relates to an underground concrete impounding reservoir heat preservation method. The method comprises the steps that an algorithm is provided for judging whether or not insulation measures need to be taken to an underground concrete impounding reservoir of a region, a heat preservation material is selected througha calculation result, the specific heat preservation structure is designed, and a heat preservation material is used for performing heat preservation treatment on the top and the walls of the underground concrete impounding reservoir. The method can avoid the problems that the cost of the reservoir is excessively high due to the fact that the reservoir is embedded excessively deep in hot-summer and cold-winter zones, and the underground concrete impounding reservoir is frozen in winter under the condition of not increasing the embedded depth in cold and severe cold regions with the frozen soil depth being larger than 1,000 mm.

Description

technical field [0001] The invention belongs to the field of construction and water storage; in particular, it relates to a heat preservation method for an underground concrete water storage tank. Background technique [0002] Whether it is industrial projects, municipal engineering, or civil buildings, reservoirs are used to store a certain volume of water for production, fire protection, or domestic use. The best covering soil for buried reinforced concrete in the current national standard architectural design atlas (04S803 and 05S804) The thickness is 500~1000mm, which is obtained according to the normal values ​​of soil conditions and concrete weight. The national standard data has the following deficiencies: First: In some areas, it is necessary to take insulation measures for the underground concrete reservoir to prevent the water in the reservoir from freezing, thereby preventing inconvenience to residents’ lives or industrial production; but in some areas such as Gua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B11/14E04H7/18E04B1/76
CPCY02A20/20Y02A30/244
Inventor 赵晓凤李能能张亭李怀志邱树敏李吉平唐晓琪许惠韩婷陈军
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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