【 Weak current College 】 super high-rise building of water supply and drainage design study on energy conservation, saving material

Summary: with the entire national economy development and urbanization level, water shortages, electricity supply shortages and growing shortage of raw materials to highlight the contradictions. Therefore, the construction of water supply and drainage design, how to optimize existing designs, with a view to achieving maximum savings every inch of the pipeline, save each valve, reduce power consumption per time, and so on, just become our water and wastewater designers in front of an unavoidable problem. The following combination of the author in an architecture of highly 120m super high-rise building water supply and drainage design practices, talk about the author in the implementation of the implementation of the "energy-saving, saving material" of practices with a view to and explore the vast number of domestic counterparts. Keywords: Super high-rise building alarm valve terminal test water water pipe


Project profile:
Zhengzhou high-rise building is located in Zhengzhou city, zhengdong new district CBD outer ring, building height 118.8m, 30 floors on the ground floor. Above-ground construction area 60863m2, underground part construction area 12317m2. Underground 1 ~ 4 layers for equipment room and underground garage, parking 242 car, underground 2 ~ 4 layers for a five-stage II in time of war, who shelters; the ground floor of the annex, 5 for dining, entertainment and commercial purposes; the main part of the main do open Office. Structure for the framework — core wall structure.
In the project design, the authors combine design requirements, and on this basis, sought some design peer views on design for a number of improvements. Hope and explore the broad design peers.

1. set the focus layer of refuge alarm valve, eliminating the practice of reducing valve
Building heights in the high-rise buildings around 120m spray system alarm valve settings, usually distributed set of wet alarm valve: the refuge in some set of wet set alarm valve for building high zone sprinkler system use; in the basement in a number of set of wet alarm valve for asylum layer below the lower area of the use of automatic sprinkler system. At the same time, according to the automatic sprinkler system design code (GB50084-2001-2005) and related requirements, wet alarm valve inlet pressure should not be greater than 1.2Mpa, in low areas wet alarm valve annular valve inlet water supply pipelines, control valve set before pressure not more than 1.2Mpa.
In closed sprinkler system design, according to calculations, spray pump lift requires 1.8Mpa. In the whole closed sprinkler system components, combined with related spray product technical parameters, wet alarm valve maximum operating pressure as ordinary glass ball hanging 1.2Mpa; sprinkler rated working pressure is 1.2Mpa, factory test pressure-3.0Mpa; general flow indicator of rated working pressure is 1.2Mpa, factory-sealed test pressure 2.4Mpa; wafer safety signal butterfly valve for operating pressures up to 1.6Mpa.
In addition, under the automatic sprinkler system installation and acceptance (GB50261-2005) 6.2.1 section: "when the system working pressure equal to or less than the pressure strength 1.0Mpa test pressure of the pressure for design work, and 1.5 times less 1.4Mpa; when the system working pressure is greater than the pressure strength 1.0Mpa test pressure shall be the working pressure 0.4Mpa. "Then, when the system working pressure is large, the use of the seamless steel tube and rated working pressure larger valves, and other materials to satisfy the system's design and construction of acceptance needs.
A combination of the pressure data, in the whole closed sprinkler system design, as the entire system is an important element of, by contrast, wet alarm valve of the maximum working pressure of only 1.2Mpa, less than the other components of the overall system. For this reason, the sprinkler system design code (GB50084-2001-2005) will require wet alarm valve inlet pressure should not be greater than 1.2Mpa.
In the project design, the author gave the following account: If you follow the conventional design, take refuge in the basement and decentralized setting wet layer of alarm valve of practices, such as automatic sprinkler system schematic diagram (a) below, in the low zone alarm valve set pre annular valve group separately online. According to the design requirements, reducing valve group typically uses two sets of parallel, each alarm valve set alarm valve control valve before and after Setup and add filter before the alarm valve. Due to the alarm valve control valve before and after the general use of ordinary relief pressure valve manually, once a failure control valve is not equipped with automatic shutdown functionality. Therefore, the two group alarm valve groups often do not have the fault situations automatically switch function, you can only switch it manually. In addition, because of the decentralized setting alarm valve, from a certain extent, increase on-duty staff strength.
In order to overcome the shortage of low areas above to further ensure the safety of wet alarm valve, after repeated consideration, ultimately decided to set up wet alarm valve set, distress layer such as sprinkler system schematic diagram (ii) below. Due to the height of the building took refuge in the spray around 60m pump lift minus alarm valve and spray pumps-height difference (spray pump located in the ground three layers. ), So you can ensure that wet alarm valve valve pressure is less than 1.2Mpa before. By contrast, since the alarm valve set at refuge layer set, no need to set the valve to valve group prior to the effective guarantee of alarm valve will not occur, so you can make sure that the security alarm valve and further improve the entire automatic sprinkler system safe. At the same time, alarm valve set settings, will facilitate the system operation and management of the future.

2. roof rainwater drainpipe as spray tip test water drainage practices
For a high-level framework — core wall structure of high rise buildings, due to the high-rise building itself more vertical pipeline, will need to use standard layer limited floor space. Well, our water and wastewater professionals, whether on an existing pipeline system for reasonable optimization, to ensure building functionality, doMay reduce the number of vertical pipes, both to save the tubing, as well as to save space.
For high-rise building roof rainwater drainage design, the construction of water supply and drainage design code (GB50015-2003), 4.9.26 stipulates: "the high-rise construction storm water drainage pipe use pressurized plastic or metal tubes. "At the same time, I also refer to the domestic part of the design of high-rise buildings, roof rainwater drainage pipe use of hot-dip galvanized steel pipe, some using steel-plastic composite pipe. At the same time, in the design of the spray super high-rise building and in conjunction with the spray eqnipment settings location, you need to set a special spray water drainage pipe end. Then, in the design of the spray plane, can be combined with roof rainwater drainage pipe set location (on high-rise frame — core wall structure of rainwater pipeline construction, often rely on external wall design. ), Close to the storm sewer Department reasonable set spray eqnipment? this design, you can put the roof rainwater pipes and do spray tip test water drainage pipe.　　In theory, this should be feasible. In the zhengdong new district the high-rise project design, the author used the following approach: roof rainwater pipes with PVC pipe lining, exterior setting. Near the end of the rainwater downpipes shower on each floor of the appropriate location (more than in the indoor ceiling. ), Leads to a DN50 drainage pipes (and rainwater pipes with different materials. ), And combined with spray water drainage system at the end of the need to set the drain funnel. At the same time, it sets the control valve on the pipe (design uses ball valve. Not suitable for under water needs, set the stop valve. ）。 When the layer need to open the spray system to test water eqnipment, manually open the layer storm sewer pipes on the control valve (valve can also be automatically open and close. ), Emissions of water spray test; when at the end of the test, close the valve to prevent rain, roof rainwater drainage from the layer into the rooms at the funnel. Use the above approach, saves a trip to a sewer, and the cost savings related installations; while also minimizing the standard layer construction area of occupancy.

3. the cooling tower design and energy-saving operation
Usually for central air conditioning cooling water circulation system architecture, combined with the high (multilayer) building of the main building and annex and outdoor venues, the reasonable choice of cooling tower placement, cost savings, reduce operational costs is important in the future. Set the location of the Tower, while building professionals and outdoor environment allows, on the outdoor grounds (Green Italy) directly set the cooling tower is also a good choice. Obviously, the cooling tower location away from the refrigeration unit closer, compared to more economical cooling on water pipes, will help reduce the cooling water circulation system of cost and installation cost. At the same time, the cooling water pipe length smaller system pipe head loss must reduce, to reduce the cooling water circulation pump of lift, also reduces the cost of running the system in the future. In addition, because of daily ground speed compared to the high-altitude is much narrower. When setting the position of the lower cooling towers, cooling water floating desiccation or less harmful to the whole system of water-saving. Furthermore, because the lower cooling tower set location, then cooling water circulation system of water system can make full use of municipal water pressure, avoiding the cooling tower water system of secondary pressure, is bound to a certain extent reduce system operating costs in the future. At the same time, if you can directly set the outdoor cooling tower on the ground, not bound to reduce cooling tower on the roof of the roof load and save on the cost structure.
In the project design, combined with the use of the building the underlying function, at the same time, combined with the architectural outdoor venues, the tower is set in the building to the South of outdoor green area. Consider beautiful needs require cooling tower manufacturers on the Tower body (square cross flow cooling tower) for proper landscaping (reference electrical professional outdoor box-type substation approach: outdoor box-type substation after appropriate treatment, its beautiful appearance can be used as outdoor architectural sketch). Due to the cooling tower located in the outdoor green area, in order to prevent external leaves into the cooling water circulation system, and designed in a outlet for cooling tower of the Tower on steel wire mesh. The system is running, run the air conditioning in season. At the same time, according to the actual effect after completion, because Outdoor cooling tower treatment properly, equivalent to an outdoor sculpture, rich architectural environment, played a good effect.

Conclusion:
With the contradiction between the supply and demand of national resources have become increasingly prominent, in the design to take all necessary measures to fully implement the "saving water, saving material, land, energy, environmental protection" of the design requirements, become each drainage designers face an unavoidable responsibility. This requires that we designed, fully understanding the design of every detail, ensuring design features you need, from a small maximum savings every inch of the pipeline, save each valve, reduce power consumption per time, fully reduce system construction and operating costs.