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The design task is to complete A Shanghai management center office building air conditioning engineering design , design issues since the actual project. Purpose of this project through the design, control air-conditioning systems design, design steps to train students of the problem, solve the problem of the actual application capacity; deepen their understanding of building air-conditioning engineering expertise and understanding of memory; have air-conditioning duct, plumbing , Equipment selection and layout; master of wind and water mains in calculation; enhanced graphics capabilities and develop analytical, problem-solving practical engineering capabilities for the future in the indoor environment and public works construction equipment of HVAC design and construction organizations , Operation and management work for a reliable basis.
2 The general situation of the engineering
The project is located in Shanghai, three floors, ground floor, with a total construction area of 2767m2, floor area of 2075m2, ground floor area of 692m2, total building height of 13.56m. The basement are storage rooms , without design air conditioning system . Three floors, the first floor for office management center, with the height of 3.6m . Two to three for the staff quarters, the layout basically the same, with the height is 3.3m . The office cooling source takes the heat pumps with air-cooled chiller, and water system chooses the two dual controls, the same distance, closed system, and the wind system selectes a unified air fan coil system. The stairwell takes roof ventilation and The rooftop has two air conditioning rooms .
3 The basic of Design
3.1 Design task request and the original information
According to the Building nature, purpose and requirements of the construction unit of A Shanghai management center office building air conditioning engineering design are as follows：
⑴ load calculation
⑵air-conditioning system design wind: based on the actual situation of choice for the construction of the system
(3) the calculation of air-conditioning Selection: including the choice of fan coil, air conditioning units and air units of the new calculation Selection
(4)air conditioning water systems and wind systems design and calculation: including water piping system design, fan coil units and air-conditioning layout
4 The main design work
Choice of architectural features of air-conditioning; cold and heat load calculation; wind of a water pipe layout, hydraulic calculation; breakdown of the water pipeline computation. Hydraulic calculation based on choice of air-conditioning, including air conditioning units, the new wind generating units, fan coil, outlet and other equipment
5 Air condition breeze systems
As a result of these air-conditioned rooms more, the corresponding area of smaller, separate rooms require adjustment, and the room temperature and humidity requirements do not strictly, have adopted the new Canadian Wind fan coil air-conditioning systems.
The first layer of the is office management center,using the form of blowing after fresh air mixed with return air .This way can save blowing outlet, and the fresh air and fan coil blowing mixied Homogeneous.
Two and three floors for the dormitory uses the form of a single set of new outlet side of the air .The new wind-based system, an independent supply of indoor and outdoor weather can change with the adjustment, which is the new wind to deal with indoor parameters, do not assume room load to ensure that indoor humidity and Xinfeng Liang requirements. This programme is improving the system of regulation and the flexibility of operation, and the fan-coil into the water supply can be appropriately raise the temperature, water mains condensation phenomenon can be improved.
6 Air conditioning water system
As the building's air conditioning system using water-pressure gas tank closure expansion tank means constant pressure. The system pipeline simple process takes the same distance that supply and return water pipe in the same direction as the flow of water through a loop of each pipe length equally, using this method to make water allocation, easy to adjust, easy to water balance.
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