On the building water supply and drainage in the energy-saving design

Paper Keywords: building water; water supply and drainage design; energy-saving design; green energy
Abstract: With economic development, natural resources are increasingly strained. In the construction sector, water supply and drainage design how to achieve energy saving has become the benchmark test whether the building. Article from the use of solar water heaters, the use of municipal water supply pipeline and pressure pArtition and water-saving bathroom products, we discussed how to do a good job in building water saving design.

First, the significance of energy-saving design
Water is the source of life, not only the people's livelihood, but also on economic development and social progress plays an important role. In recent years further aggravated the energy crisis, water resources become increasingly strained, the world more and more attention to water resources protection, water use, and sewage treatment. In the construction sector, water supply and drainage design how to achieve energy saving has become the benchmark test whether the building, so good drainage is necessary energy-saving design is an important pArt in the design cycle it is a good water supply and drainage .1 energy-saving design has far-reaching significance.

Second, to the drainage design of energy-saving measures
(A) the use of municipal pipe network and pressure, by way of district water supply
Urban water supply, as the pressure of municipal water supply network in general between 0.2 ~ 0.4MPa. Reasonable use of the municipal pipe network pressure, the use of district water supply, can reduce the energy consumption of secondary pressure. If the municipal pipe network pressure is 0.3MPa, a and below the five floors of the municipal pipe network can be used directly to water. five or more non-negative frequency of water supply equipment with water. This is not to waste the municipal pipe network and pressure but not so the lower floors of the pipe network pressure is too high, resulting in energy consumption and water waste.

Municipal water supply network as the pressure is limited, water pressure is often difficult to fully meet the requirements of high-rise buildings water supply, so high-rise building water supply system design methods are often used in pressurized water supply, water pipe network will be introduced directly to the pool water, and then pump to pump water in water tanks or hit the tank, water supply system of water supply again. municipal water supply network water pressure is usually around 200MPa, 250MPa-270MPa at night can reach around, but because of the previous municipal water supply pipe network security is not very stable, to ensure the safety of construction of water supply, preferring to give up the pArt of the pressure, resulting in waste of energy, especially when the storage tank located in the basement, he could put all the pressure can be converted into negative pressure, which was very economical. Design should fully consider the use of municipal water supply network to provide the water pressure, the lower layers of high-rise building directly from municipal water supply network of water supply, water supply or tank top with pressurized water pump, high current requirements of the Ministry of water security, the design can be considered the upper and lower pArts of the network connection with a normally closed valve, usually water district, municipal pipe network of an accident, the normally closed valve opens, pressurized water from the tank or pump, can be both at the same time in the energy supply security.

(B) the development of water system
Water is a building construction or building within the district domestic wastewater, cooling water and stormwater drainage and other returns properly treated within the district for the building or buildings, as miscellaneous water sources of water. The collection of water facilities, raw water, storage, treatment and supply facilities such as composition, the system is the modern facilities one of the residential function, the data show that the use of construction in the residential water consumption savings of 30% to 40%, waste emissions can be reduced by 35% to 50 % of water sources in more than several waste water in the bathroom the most, its more uniform use of time, water quality is better and more stable, so its construction should be the preferred source of water, but the current building technology with water running effect of stability poor and high cost of the disadvantages, so the design process should be integrated technology, management, investment and other factors to select a new quality of the water treatment process.

(C) the use of variable frequency pumps
High-rise buildings usually pump the joint water supply tank, the pump will be upgraded to high water tank, and then down the water supply, a number of water points to prevent over-pressure, pressure relief devices to be set, resulting in unnecessary power consumption, and as the motor starts very frequently, can also cause great waste of energy. the design of variable frequency pumps can be used directly to the water supply system, water supply, the manner by adjusting speed to regulate the flow of water are automatically adjusted according to the pump motor speed, motor speed when the amount of water required by a large large, require hours of motor speed decreases, the motor frequently to avoid starting from the root to prevent energy waste. At the same time eliminating the need for water tanks, water tanks, reducing the cost of equipment investment. a survey, the use of variable frequency pumps water supply, electricity rate of up to 30% to 50%. Now technology has been improving frequency control and mature, with significant energy-saving effect, convenient way to speed the higher speed range, and improve the protection and reliable operation, etc., Therefore, the promotion of variable frequency pumps in the building water supply and drainage system, reducing energy waste is of great significance.


(D) the automatic control meter
Water saving measures are also an important means of building, using the technology mainly to avoid delay stool delay device autistic valve adjustment and failure in time, adjust the water level in pool water tank cap without monitoring, once the inlet valves are faulty water level more than AIDS orifice can not discover such phenomena caused by the waste of water, so the design process should try to use automatic control and good quality products and design ideas. reposted elsewhere in the Research Papers Download http://www.hi138 . com (e) selection of water pipes
Water from the water to the delivery of water distribution points during the flow rate and pipe water supply pipe, the wall roughness on the water will have a great impact on head loss, pipe wall roughness and the less the local resistance of the water in the pipe The flow resistance is also smaller, so when the diameter is determined from the energy point of view should be used in small local resistance roughness of the pipe, and the second pressurized water supply for the required water supply system, the engineering pipeline pressure drop of its value longer the greater the pressure pump for the system selected the most negative point when the water pressure slightly less than the smooth wall can be adjusted to the water supply pipe to reduce resistance loss, and to ensure water supply to meet the requirements of the purpose of the system.

(F) Preparation of residential solar hot water, save energy and natural gas
Modern solar thermal technology is to aggregate the sun and use its energy to produce hot water, steam and electricity. Solar inexhaustible energy saving design features make it the first choice. In the energy-saving design of water supply and drainage can be consider the use of solar water heaters or heat pump water heater to replace the traditional energy-intensive coal, oil, gas water heaters and electric boilers.

Solar water heater is a collector, storage tank, to the water tank, circulating tubes, circulating pump, water distribution and other components. Sunshine in most parts of China a long time, suitable for promoting the use of solar energy. Solar energy is generally divided into flat and vacuum tube type two. single block or multiple blocks of building construction combined solar water heater, and set the hot water tank, for indoor warm-water heaters, instantaneous water heater single indoor setting. hot water system can be installed on the roof, walls and balconies and other locations, to a certain extent, to achieve the perfect combination of collector and construction, but in solar hot water system design should be noted that in cold areas should consider its frost resistance, thermal shock resistance as well as its bearing capacity and other factors.

{G) using water-saving bathroom products
Water distribution apparatus and sanitary equipment units as end-use of water saving performance of their direct impact on the effectiveness of water conservation work construction, so use the functionality to meet their premise should try to use energy-saving sanitary ware, mainly including the use of the specific measures small volume of flushing the toilet tank to reduce the amount of water, at present, widely used in China flush> = 11L of the toilet, water consumption. If you use all the toilet flushing water �� 6L, you may be saving 14% residential, hotels, restaurants can be saved water 4%, 27% of office buildings can be water. For the kitchen, shower, wash basin and other water-saving devices to improve the water supply is mainly from the performance of components to achieve, such as the use of inflatable water taps, shower foot pedal, water delay from the closed valve, such accessories can play in saving water and energy to varying degrees of effectiveness, and energy efficiency and building height is proportional, that is, the higher the building the more obvious energy saving effect, within the building for public health flushing system should be washed regularly banned and replaced the traditional CNC control or infrared photoelectric effect appliances.

In addition, the buildings in the design process should be based on the local and the specific circumstances of the building to take a series of targeted measures, such as pipeline valves using low resistance and low resistance to backflow prevention device and other devices to reduce the local head loss pipe; for Plastic pipe has a low cost, easy installation, smooth wall, corrosion, scaling, low pollution and low price, as well as thermal conductivity, J spectrum characteristics, so the new building design, especially in the hot water pipeline should be adopted in the design of plastic pipe to replace the old metal pipes and so on.

Third, the conclusion
As modern society, abuse of resources, without attention to protecting the environment, more and more serious adverse effects affect the economy. Most of the non-renewable resources, forcing people to save energy on making a fuss, people always use water as but the resources are scarce resources is more and more people to pay attention, in the modern building design process should adhere to energy conservation, water pollution and so do a good job to start saving energy and water work. reposted elsewhere in the Research Papers Download http: / / www.hi138.com