Ventilation system for tunnel engineering

Abstract

The present invention discloses a ventilation system for tunnel engineering. The ventilation system is for use in a tunnel having at least one first shaft and at least one second shaft. The ventilation system includes a heat collecting device, a cooling device, and at least one piping system. The piping system is connected to the heat collecting device and the cooling device. A portion of the piping system coils inside the first and second shafts. Increasing the temperature in the first shaft and/or decreasing the temperature in the second shaft introduces ambient air into the tunnel via the first and second shafts by natural convection, thereby decreasing and maintaining the temperature in the tunnel and renewing air therein. The ventilation system advantageously features low power consumption and low manufacturing costs and is fit for use in long-distance tunnel engineering that requires multi-point installation of the ventilation system.

1 . A ventilation system for use in tunnel engineering, applicable to a tunnel having at least one first shaft and at least one second shaft, the ventilation system comprising:
 a heat collecting device for collecting heat; and   at least one piping system each comprising:
 a first pump connected to the heat collecting device; and 
 a first pipeline communicating with the first pump to form a circuit, wherein a portion of the first pipeline coils inside the first shaft to form a heating spiral pipe inside the first shaft. 
   
     
     
         2 . The ventilation system of  claim 1 , wherein the heat collecting device comprises:
 a heat collector; and   a heat exchanger connected between the heat collector and the first pump.   
     
     
         3 . The ventilation system of  claim 2 , wherein the heat collecting device further comprises a first storage tank configured to function as a heat-storing device and connected between the heat exchanger and the first pump. 
     
     
         4 . The ventilation system of  claim 3 , wherein the heat collected by the heat collector is non-electric heat. 
     
     
         5 . The ventilation system of  claim 4 , wherein the non-electric heat is solar energy, geothermal energy, fuel gas energy, or waste heat. 
     
     
         6 . A ventilation system for use in tunnel engineering, applicable to a tunnel having at least one first shaft and at least one second shaft, the ventilation system comprising:
 a heat collecting device for collecting heat;   a cooling device for refrigeration comprising:
 a cooler connected to the heat collecting device; and 
 a cooling tower connected to the cooler; and 
   at least one piping system each comprising:
 a first pump connected to the heat collecting device; 
 a first pipeline communicating with the first pump to form a circuit, wherein a portion of the first pipeline coils inside the first shaft to form a heating spiral pipe inside the first shaft; 
 a second pump connected to the cooler; and 
 a second pipeline communicating with the second pump to form a circuit, wherein a portion of the second pipeline coils inside the second shaft to form a cooling spiral pipe inside the second shaft. 
   
     
     
         7 . The ventilation system of  claim 6 , wherein the heat collecting device comprises:
 a heat collector; and   a heat exchanger connected between the heat collector and the first pump.   
     
     
         8 . The ventilation system of  claim 7 , wherein the heat collecting device further comprises a first storage tank configured to function as a heat-storing device and connected between the heat exchanger, the cooler, and the first pump. 
     
     
         9 . The ventilation system of  claim 8 , wherein the cooling device further comprises a second storage tank configured to function as a cold air-storing device and connected between the cooler and the second pump. 
     
     
         10 . The ventilation system of  claim 9 , wherein the cooler is a heat-driven cooler. 
     
     
         11 . The ventilation system of  claim 10 , wherein the cooler is an adsorption type cooler or an absorption type cooler. 
     
     
         12 . The ventilation system of  claim 7 , wherein the heat collected by the heat collector is non-electric heat. 
     
     
         13 . The ventilation system of  claim 12 , wherein the non-electric heat is solar energy, geothermal energy, fuel gas energy, or waste heat.