A Method for Optimizing Exhaust Air of Subway Tunnel Heat Exhaust System
A technology of heat removal system and tunnel, which is applied in the field of tunnels within the range, can solve the problems of poor heat discharge from tunnels, poor heat discharge effect, and many tuyere, so as to achieve the effect of improving heat discharge effect
Active Publication Date: 2019-12-10
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
The heat exhaust fans are arranged at the front and rear ends of the tunnel. The heat exhaust system on the top and bottom of the rail has many air outlets and long air ducts. In addition, the blockage ratio of the train is large. When the train stops, the fresh air in the middle is not as long as the path, and the heat cannot be discharged from the tunnel well.
The heat removal effect of the track top exhaust system on the tunnel in the middle of the station is significantly worse than that of the tunnels at both ends of the station. To reduce the air temperature in the tunnel in the middle of the station, it is necessary to increase the exhaust power of the heat exhaust fan, which leads to the subway ventilation system increased energy consumption
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[0055] The purpose of the invention of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the implementation of the present invention is not therefore limited to the following embodiments.
[0056] Firstly, it is stipulated that the incoming traffic direction of the tunnel within the station range is the front of the tunnel, and the driving direction of the tunnel is the rear of the tunnel. The research object is only the tunnel within the station range.
[0057] Such as figure 1 As shown, a method for optimizing the exhaust air of a subway tunnel heat exhaust system includes steps:
[0058] S1. Obtain the temperature field distribution in the subway station range tunnel through experiments or simulations;
[0059] S2. Divide the tunnels within the metro station into equal sections. The number of segments is equal to the number of ai...
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The invention discloses an optimized exhaust method for a heat discharge system of a subway tunnel. The optimized exhaust method for the heat discharge system of the subway tunnel comprises the following steps: step 1, acquiring temperature field distribution in the tunnel in a subway station range by experiments or simulation; step 2, equally dividing the tunnel in the subway station range, wherein the equally divided number is equal to the number of rail top exhaust channel air opening groups, and it ensures that each section of the tunnel only comprises one group of rail top exhaust channelair openings; step 3, calculating the air average temperature of each section of the tunnel, and calculating the difference between the average temperature of each section of the tunnel and the temperature of piston wind of the tunnel so that the ratio of supply air rates of various air inlets of a rail top is the same with the ratio of various differences; and step 4, calculating according to the supply air rates of the various groups of air inlets of an exhaust channel of the rail top to obtain the ratio of opening areas of the various groups of air inlets, and adjusting the opening degreeof the various groups of air openings of the heat discharge system according to the ratio of the opening areas. By a measure of adjusting the opening degree of the subway rail top exhaust channel airopenings, the heat discharge effect of the heat discharge system of a subway is improved, and a purpose of saving energy is achieved.
Description
technical field [0001] The present invention relates to tunnel ventilation within the range of subway stations, and in particular to a method for optimizing ventilation of a subway tunnel heat exhaust system. The method utilizes the existing subway tunnel heat exhaust system without changing the system power and air duct structure, and proposes An optimized exhaust strategy that is conducive to the balanced decrease of the overall temperature field of the tunnel. The vehicle adjusts and changes the opening of the hot exhaust air duct on the rail top and the air inlet opening in the high-temperature area of the tunnel to achieve efficient heat exhaust and energy-saving effects in the tunnel. Background technique [0002] When the subway is in operation, the main source of heat in the tunnel is the heat discharged into the tunnel by the condenser in the air-conditioning system of the subway train and the frictional heat generated by the train brakes. If this part of the heat ...
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IPC IPC(8): E21F1/00E21F3/00
CPCE21F1/003E21F3/00
Inventor 巫江虹孟宪霖
Owner SOUTH CHINA UNIV OF TECH