thediscussionofwater-savingtechnologyaboutwatersupplyanddrainageinbuilding-外文文獻-文庫吧
2025-04-16 12:30 本頁面
【正文】 etween MPa and MPa, most of them are in overpressure flow. In recent years, branch pipe depression was widely used in projects, which became an important measure for watersaving. In the lower part of water supply subarea, the hydrostatic pressure of water supply after depression should take low value as possible on the condition that it satisfies the demand of rated flow of sanitary wares’ water supply fittings. It is suggested that, in higher part of water supply subarea, depression measures should be taken when the lowest hydrostatic pressure of sanitary wares’ water distribution points is more than MPa. B. Adopt depression measures Properly allocating relief fitting in water supply system means that hydraulic pressure should be limited within limiting value and reduce the threat of overpressure flow. 2020 International Conference on Digital Manufacturing amp。 Automation9780769542867/10 $ 169。 2020 IEEEDOI 669668Reducing Valve can reduce dynamic pressure, static pressure。 have good running characteristics and have obvious effects on throttling and sound absorbing, which is widely used in the new buildings. However, the price of reducing valve is expensive, so it should be used after doing an economic parison in poor and backward areas. Proportional valve has simple structure and reasonable price which is remended to use. Compared with reducing valve, depression orifice plate’s system is fairly simple, and has less investment as well as convenient management, but depression orifice plate can only reduce dynamic pressure but not hydrostatic pressure, and the downstream pressure is always changing with the upstream pressure and flow rate. So it only can be used under less demand on water supply pressure. III. PERFECT HOT WATER SUPPLY SYSTEM AND REDUCE INEFFECTUAL COLD WATER With the improvement of people39。s living standard and improved building functions, building hot water system gradually bee a indispensable part of building water supply system. According to the survey, most central hot water supply system exist serious wasteful phenomenon, which is mainly embodied in we can not obtain satisfactory hot water in time after opening hot water apparatus, but let out some cold water to normal use. The present Code for Design of Building of Water Supply and Drainage puts forward three methods of hot water circulation, which include branch pipe circulation, stand pipe circulation and main pipe circulation. Loop free hot water system can be used in miniature hot water supply systems, such as bath centre in factory which provide timelimit hot water supply. Take the case of a 12storey apartment in Beijing, when adopted branch pipe circulation, stand pipe circulation and main pipe circulation method, the volume of ineffectual cold water in theory，volume of water saving，and the estimate cost of corresponding backwater systems engineering are correspondingly calculated. Based on the amount of watersaving and the view of satisfaction, the order from good to bad is branch pipe circulation, stand pipe circulation and main pipe circulation and loop free system. Based on the capital payoff time, branch pipe circulation is about 30 years, stand pipe circulation is about years, and main pipe circulation is about years [3]. Therefore, considering the watersaving effect and the engineering cost, main pipe circulation method and loop free system should better not be use in the new buildings’ centralized hot water supply system. According to Architectural Nature, architectural standards, regional economic conditions and the specific situation, branch pipe circulation or stand pipe circulation can be used to reduce even eliminate the waste of ineffectual cold water. IV. ADOPT WATERSAVING WATERDISPENSING FIXTURES AN
畢業(yè)設(shè)計相關(guān)推薦
鄂ICP備17016276號-1