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Main air conditioning system scheme for on-line system, adopting the split unit undertake air-conditioning cooling load and heat load of the room, each office room inside the condole top of VRF indoor machine. Fresh air is through independent fresh air heat exchange device into the room. Fresh air unit condole top installation, fresh air units burden this layer all the fresh air load of air conditioning room. The air conditioning system has the advantage that occupy less floor area, can be centralized cooling and heating; At the same time each terminal equipment have independent switches and adjustment function, each the temperature of the room alone can adjust and control, and prevent cross contamination of the air. Air conditioning water system adopting closed system, because it is in addition to not pollution, saves the initial investment, but also has the obvious energy saving effect.
That text carries to the new breeze of the office building, the cold heat carries with wet carries to make the meticulous and accurate calculation, design for air condition machine set, place with a draught etc. of choose type and breeze ways arranged to provide well but accurate basis. The design of the cooling load is 339.284 kW, cooling load indicators is 134kW/ m².
The office building send to the wind force begs everywhere even, easy to concentrate control with economize on energy. Breeze a request for arranging and cross section size too synthesizing consideration current velocity inside the tube with noise. In system selecting, the layer point expatiated the choice breeze machine dish takes care of the reason of the system and the characteristics of that systems, the breeze machine dish tube half concentrates the type system has the extensive applicability to the office etc. mainly room and each rooms carried and request to be each not floor. fan coil equipment chose Haier’ products, which fans of small type, double inlet centrifugal fans multi-leaf .The cold bottled water and return water temperature is 7 ℃~12℃.
Moreover, this text returns the point expatiated the cent area of the system arranges, tube road together the arrangement of the program system and choose the fit equipments etc. problem to the concrete circumstance, particularly detailed introduced each water supply of direction, the pipe line of congealed water takes care of the choice method of the path. The design selects the closed air conditioning system, the vertical with the process, the level of different programs, dual control, single-stage pump, constant flow system.
The system use air-cooled heat pump units as cool and hot source. Two equipments select the Kunlun Nantong Air-conditioning Group’s products .The model is RKFQR-80.Each cooling capacity is 282kW, for heat is 336 kW. An air-cooled heat pump units up to 90% energy efficiency, saving energy consumption, greatly reducing the user cost.
In the design the new air intakes the fixed waterproof shutters in order to prevent flood water from entering. According to the actual situation in the office building, offices and corridors use square diffusers, the lobby organization use lateral air flow and select double-outlet louvers. Return air ducts are fixed in the ceiling .The advantages of duct layout is to reduce investment and does not occupy floor space. Moreover, it is easy to decoration and coordination.
The design elements include: hot and cold air-conditioning load calculation; air-conditioning system and the determination of proof; air supply and air supply parameters of the determination; selection of air-handling equipment; cold and heat source of choice and selection of equipment; airflow calculated; hydraulic calculation; other equipment of choice; thermal insulation and vibration and noise reduction, and other content.
The design of office building’s air-conditioning system should be combined the characteristics of office buildings. The airflow speed, temperature, humidity should reasonable. Staff will feel comfort in this circumstance. This is benefit to get better work efficiency. So take full accounts of reasonable air flow, temperature, humidity and pressure control, energy conservation measures and automatic control system to make the design more reasonable, more in line with national norms, to meet the requirements of owners.
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