First, the project only consider the summer air-conditioning design, set up two screw chillers in the basement refrigerator room, each cooling capacity 440kW, power 91kw, chilled water flow 75.6m3 / h, cooling water flow: 90m3 / h. York design company selected products (unit DDC interface). Construction owners choose Daikin unit for the single screw machine. Another due to a control room and related supporting requirements 24 hours a day, another set of small air-cooled unit, the cooling capacity of 51KW, the unit placed on the ground floor for the control room and related supporting housing Provide 8 hours of work outside the cold.
Chilled water circulating pump with a prepared, flow 93.5m3 / h, power 11kw, head 28mH2O. Cooling water circulating pump with a prepared, the product model to determine the professional water supply and drainage.
Two circular cooling towers are installed on the roof, each handling 105m3 / h of water
Second, the air conditioning system The first floor conference room with a low speed variable air volume return air system, in different seasons according to indoor and outdoor air enthalpy difference control of the new air volume. The other side of the conference room on both sides of the wall to set the low-noise axial fan, excluding hot air above the meeting room.
Basement management room, ground floor control room and related supporting rooms, offices, bedrooms, small meeting rooms and other rooms with fresh air plus fan coil air conditioning system. Ceiling-mounted fresh air units set at all levels, the fresh air is treated until the enthalpy state of the air supply, indoor air-conditioning load borne by the fan coil.
Three, air-conditioning water system Air conditioning water system is a dual-control system for a variable pump variable flow: through the supply and return pipes between the pressure-setting bypass valve and the end device to set electric two-way valve to achieve quantitative cold side, load side variable flow.
Chilled water A total of A, B two stand pipe, led by the shaft to the various layers of fan coil or air handler, chilled water using two control system. Cold water temperature is 7 ℃ / 12 ℃, by the high expansion tank constant pressure replenishment.
Fourth, the mechanical ventilation system Each bedroom bathroom set exhaust fan (installed inside the ceiling), through the shaft row to the outdoors, public toilets set the exhaust fan will be dirty air discharged outdoors. Equipment room, warehouse, garage set mechanical exhaust, naturally into the wind.
7 air-conditioning controlled air-conditioning using DDC control system, designed and installed by a professional self-control company. Water system is set for the backwater differential pressure control, cold flow control and unit number and equipment operation control.
Fifth, the design experience Because the design of the construction drawings of the open office is not parted, so only reserve the total cooling capacity and determine the layers of new fan air volume, only in the decoration phase according to the decoration requirements and meet the cooling capacity premise The layout of the fan coil, water pipes, fresh air duct, tuyere and so on. The type of outlet is set as a slit outlet or a square diffuser according to the decoration needs. Therefore, if the decoration involved early, you can avoid a large number of changes to the construction drawings and decoration with less than satisfactory results appear.
In addition to controlling the wind speed of the wind pipe, the wind pipe is also equipped with a composite duct. In the air-conditioned room, the unit is muffled, and a low-noise cabinet type air conditioning unit is selected. Plenum silencer are used.
Krah Pipe
The performance characteristics of the HDPE winding structure wall tube are as follows:
1. The hot state of winding forming welding joint quality is high.
The flat material belt and U-shaped material belt extruded from the mouth die of the extruder in the melting state are evenly wound on the heated roller die according to the predetermined position, which ensures the quality of the fusion joint of the structure wall tube. In particular, in the structural design, the melt joint of the flat material belt is covered by a polyethylene-coated supporting tube, which improves the overall resistance to the external pressure of the product.
2. Good connection quality.
The pipe connection with excellent installation performance adopts the
embedded electric fuse in the socket with the same material socket welding
connection technology. It can achieve zero leakage, ensuring the same life span of the pipeline system and the safety of operation. At the same time, because the product under the condition of the same application as other tubes light weight, and is easy to transport, construction is convenient and quick, and can reduce the construction cost, in the range of applications, without a concrete cushion layer and concrete jaasiel groove can directly apply the tube after qualified, basically, stay do under excavation, side tube, while backfilling, simplifies the construction procedures, shortening the time limit for a project. During the project acceptance, the closed-air test is used instead of the closed-water test, which not only speeds up the acceptance but also saves the complicated work and a lot of test costs in the closed-water test
3. Good flexibility
High-density polyethylene winding structural wall pipe has macro flexibility, and the micro pipe section has strong rigidity and overall resistance to external pressure.
when used under heavy load road surfaces, it can ensure the safety of traffic. Due tothe flexibility of the pipe, it can also reduce the damage loss of the pipe to the minimum in the event of an earthquake, uneven surface settlement, and other geological activities. These characteristics improve the seismic mitigation ability of public facilities.
4. HDPE can be recycled, The main raw material of winding structure wall pipe
is green environmental protection products, such as high-density polypropylene, which doesn`t have any toxicity. There is no dye in the production process. The used pipeline can be 100% recycled. It is a green product of environmental protection.
5. Corrosion resistance, aging resistance, and service life span can be up to 50
years.
High-density polyethylene has the ability to resist chemical corrosion and
erosion. Therefore, when the winding structure wall pipe is conveying corrosive fluid or laying in corrosive soil, it does not need anti-corrosion treatment, and its performance is much better than other pipes. The product in the design process, chooses a reasonable product structure form, to ensure the service life span of the plastic pipe is more than 50 years, and no maintenance is needed in the life span.
6. Tube inner wall roughness, large water transfer around the structure of the
wall tube. Product inner wall roughness N is about 0.010, so the transmission of fluid has lower friction, compared to other products such as cement pipe with a similar diameter the water transfer is greatly improved. Therefore, the smaller HDPE tube can replace the larger cement pipes. In application, under the same conditions, using a wall pipe winding structure can have better reliability compared to the traditional pipe material. The comprehensive benefit is obvious, especially in the narrow construction site, high building density, underground pipeline, complicated traffic busy roads, and acid soil.
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