Thread Content
With the development of cities, high-rise buildings are common everywhere. Property managers of high-rise office buildings and residential complexes, as well as private residents in such buildings, all face a practical problem, namely secondary pressure boosting for water supply. Only with well-developed infrastructure can the water needs of the entire building be met, which is why secondary water supply systems exist. However, this secondary water supply system is custom-designed based on the specific conditions of high-rise buildings; since the data regarding water consumption and head pressure vary, the water supply systems for different buildings differ significantly. So, at this point, the question arises: is there only one common method for supplying water to high-rise buildings? The answer is naturally no. The basic characteristics of the water supply method in the water supply systems of high-rise buildings are zoning and pressurization. Once the vertical zoning of a high-rise building is determined, the most important issue is to select the appropriate pressurization equipment and water supply type based on the actual conditions of the building. Currently, based on the type of pressure supply equipment used, it can be roughly divided into three categories: 1. The high-level water tank supply method. The high-level water tank supply method can be further divided into three basic types, depending on the way in which pressure is applied: single lift, zoned series connection, and zoned parallel connection. By using a water tank in combination with a water pump, water is supplied either in one go or in divided amounts to different areas. It is recommended that, for a high-rise building, it is more convenient and advantageous to use a water supply system based on a single type of water supply method. 2. The pressure tank water supply method makes use of the compressibility of air in a closed water tank to deliver water from the tank to the pressure-raising devices at various distribution points; it functions similarly to a high-level water tank water supply system. However, this system has limited regulatory capacity and high costs, making it unsuitable for applications that require large amounts of water and a stable water pressure. 3. The tankless water supply system was developed as a result of the continuous progress in electronic industry technology and the deeper research into the automation of water supply and drainage equipment, which led to the idea of eliminating water tanks (air pressure tanks). This basic feature requires that the water supply pressure remain constant, while the flow rate of the feed water pump adjusts automatically in response to changes in water consumption within each district’s water supply network. The first is the tankless parallel water supply method, in which variable-speed pumps are installed in each zone, with multiple water pumps operating in parallel to supply water. The second is the water supply method using a tankless pressure reducing valve, in which one or a set of constant-pressure variable-frequency devices with identical specifications and performance supply water to various zones collectively.