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Total Design
General Information Of Design：The building is located in Shanghai, the project was the hotel air conditioning engineering design, the hotel is about 35.9 meters high, is a comprehensive building, total construction area of 14000 square meters, including air conditioning area of 6520.6 square meters. 10 ground floor main building, one level for the hall, story is 3.9meters, the second floor for the restaurant story is 3.3 meters, three to nine storeys for office, standard rooms, suites, floors of 3.3 meters, 10 layer independent multi-functional meeting rooms, floors of 4.5 meters. The design of interior design reference of indoor calculation parameters, preliminary design, are: Summer: dry bulb temperature of 25 degrees, relative humidity of 60%, wind speed ≤ 0.3m / s.
According to the diagram given room number building conditions to determine the load of each room type, room size, window size, envelope heat transfer coefficient, toward the room, the heat transfer area, outdoor weather conditions, interior design parameters. Excel table to the room with the hourly load of statistics calculated, appear to determine the maximum load and maximum load value of time. According to energy conservation design standards, combined with calculation software, cooling coefficient method used throughout the hotel on the hourly cooling load calculations. After calculated, the total cooling load of the hotel as 1394 KW, maximum load moment at the afternoon 15:00.
By the calculated total load, to determine the form of systems, this design, Fan-coil system is mainly used air-conditioned rooms bear the cooling load and the heat load, the ceiling of each office room placement within one fan-coils. The new wind of fresh air through independent channels into the first fan-coil, and then mixed together with return air into the room. New wind generating units installed on ceiling, new air unit of the burden of all air-conditioned rooms in the new wind load. The air-conditioning system has the advantage of occupying less floor space, cooling and heating can be concentrated at the same time, the terminal device and a separate regulatory function switch, the room temperature alone can regulate and control, and prevent cross-infection of the air. Air-conditioning system uses closed-water systems, not because it apart from pollution, save initial investment, but also has great energy-saving effect.
According to the given design parameters and calculated parameters, find the appropriate data manual for the system of hydraulic calculations, hydraulic calculations, according to already draw system sketch, determine the system's most unfavorable pipe, mark the most unfavorable pipe node , by assuming the hydraulic sub-flow method calculations on the diameter of the pipe and the piping of the hydraulic losses, hydraulic loss for pipe larger diameter pipe to adjust, come to a reasonable total water along the way loss. Based on the calculated hydraulic losses along the way, a reasonable estimate of the share of local head loss, determine the total water loss, according to a variety of equipment selection formula is calculated for selected machinery, pumps and fans to determine the appropriate model. Excel summary data compiled in tabular form. a hot water boiler, heating capacity of 1050kW.
Fan coil, water pumps and ancillary equipment such as equipment selection and determine the model calculation. According to the design conditions and the total cooling, heat load and the design have been identified, equipment form, select the air duct and the terminal equipment, cold and heat source equipment.
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.