Several subsystems work independently and communicate with each other through the network. The advantage is that it can avoid the normal operation of other subsystems due to the failure of a certain subsystem, and also ensure the coordinated operation of the entire system.
The tunnel system consists of:
1 Traffic monitoring subsystem consisting of lane indicator, traffic signal, and ultra-high-size monitoring;
2 Ventilation control subsystem consisting of CO/VI detection and fan control. Ventilation control, traffic monitoring, and Boshan fire pump control are the focus of the entire system control; lighting control, emergency telephone, power monitoring, and cable broadcasting subsystems are the guarantee for the normal operation of the entire system.
Tunnel monitoring system consists of Fig.1Componentsofhighwaytunnelsupervisorysystem1.2 traffic monitoring system traffic monitoring system including traffic signal control system and traffic video monitoring system. The video surveillance system consists of a tunnel inside/outside camera, a video control device, a transmission channel, a digital hard disk recorder, and a monitor. In the tunnel, a fixed-focus color camera is generally installed every 150m, and the internal and external traffic conditions of the tunnel are observed visually in time to confirm the accident scene and special events, providing accurate and timely disaster relief. Information.
Shell and Plate Heat Exchanger
A shell and Plate Heat Exchanger is typical heat exchanger consists of a series of stacked plates and enclosed in a container shell. The plates are arranged in a chevron pattern, with each plate having its own inlet and outlet ports. Heat is transferred between the two fluids as they flow through the plates and shell respectively.
Shell and plate heat exchangers are used in particularly industrial plant. They are those require larger surface area and higher heat transfer coefficient, while at the same time, of high temperature and pressure.
In addition to their efficiency and compact size, shell and plate heat exchangers are also flexible in terms of material selection. Constructing material could be carbon steel, AISI 304, AISI 316L, AISI 904L, 254 SMO, Ti, Hastelloy, and more based on various operations.
Features of shell and plate heat exchanger are:
Gasket free
Stable and safe structure
Special seal structure for preventing media by-pass
High heat transfer efficiency
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