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Dongying City, an office building water source heat pump system plant design - central air conditio by na b
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Dongying City, an office building water source heat pump system plant design - central air conditio by NA B
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| Article Posted: 02/09/2011 |
| Article Views: 81 |
| Articles Written: 2638 - MORE ARTICLES FROM THIS AUTHOR |
| Word Count: 594 |
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Dongying City, an office building water source heat pump system plant design - central air conditio |
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Business,Business News,Business Opportunities
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1, Overview 1.1 Architectural Overview
Dongying City wins the Group office, located in Dongying City, Shandong Province, Taishan Road, construction area of 4500m2, a total of 7 layers, building a total height of 23.4m. Among them, 1 to 3 layers of the restaurant, 4 to 7 floor office space. The building is frame structure, aluminum windows.
The original office building of a central air conditioning system in summer, provided by a piston-type water chiller cold winter, after the adoption of central heating boiler heat exchanger. As the equipment has aged, its summer operating costs 1,000 yuan / day about winter running costs 1440 yuan / day or so. To reduce operating costs, in February 2000 decided to air-conditioned room to reform, the piston type water chiller and heat exchanger replaced with winter water source heat pump central air conditioning unit, while the indoor system flushing and maintenance.
1.2 groundwater conditions Dongying City is a high water table areas, the water level is about 0.8m above the ground. The area is the Yellow River alluvial plain, with strata for the sand layer. As the distance closer to the Bohai Sea, groundwater salinity is high. Water temperature from the surface layer is about 17.5m, the water temperature about 15 constant temperature layer.
1.3 wells case Engineered to meet, the winning group giving itself the two wells, Table 1 lists the technical data well.
Well technical data in table 1
Well depth / m diameter tube wells / m salt content / g / L sand content / mg / L water temperature pH value
110350461815 ± 18.1 2, system design 2.1 Raw Water System Source water is the water source heat pump central air conditioning systems affect the important factors that determine water source heat pump central air conditioner cooling capacity, heating capacity, electric power and other technical parameters, therefore, water system design can not be ignored. Taking into account the groundwater recharge and water reserve of wells, water systems in the design of water, the structure of two wells, well pumps and other settings were the same. This will not lead to falling water tables, can also be used to achieve the summer irrigation in winter, summer and winter irrigation use. To ensure that the heat transfer efficiency and the Grit desander effect and save the initial investment in design, the system has eight conversion valves.
2.1.1 Water Pump Water pump selection, the main consideration the temperature of groundwater, as well, the user cost of affordability and other factors. The actual situation of engineering, water pump submersible pumps well chosen. Submersible pump is characterized by: higher lift, smaller, but the price is slightly higher. Table 2 lists the main technical parameters of submersible pumps.
Table 2 The main technical parameters of submersible pumps
Type flow / m3h head / m power / kW Speed / r / min Efficiency /% mass / kg
200QJ32-91/732911328507098 2.1.2 water pipe
Taking into account the high salinity groundwater, will cause corrosion of steel or other alloys, in the design, the water pipes with polyethylene PE plastic pipe. In addition, the annex on water pipes and valves, also use anti-corrosion products.
2.1.3 Water wellhead
Water wells wellhead is an important part of the project. I am a professional writer from Components Electronic suppliers, which contains a great deal of information about bus stop signs , aluminum siding repair, welcome to visit!
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