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This design is for Shanghai haifeng hotel of the air conditioning system design, Shanghai haifeng hotel is a four floors of the hotel in Shanghai. A total construction area of 1481.9 m squared, the room type is less, basically pided into rooms, suites, meeting rooms and commercial appearance room on the ground floor. Traffic density in room is not big, is basically a hotel guest and meeting the crowd a certain size, only the outside appearance room will receive the first floor to the customer.
This design based on the principle of energy saving, comfortable and economic design, basic solution for two kinds, one kind is full air system, another for fan-coil unit plus fresh air system. Full air system refers to the indoor load borne by the treated air to air conditioning system, the advantages of this system is to send air volume is larger, so the ventilation sufficient, that the air pollution will be reduced. And in the spring and autumn transition season can achieve full fresh air, to save energy. However, considering the building with basement, no place to place the room, so this plan is not easy to achieve.
Another solution is the way of fan-coil unit plus fresh air, this way of outdoor air in the fresh air unit is processed only to indoor enthalpy of dew point to the machine, such as fresh air load and partial wet load borne by the fresh air system, indoor local moisture load and fresh air is cold, and wet load borne by fan coil units. Fan coil load decreases, and require cold water temperature is higher, coil tube row number decrease; Fresh air load increases, the required cold water temperature is low, the enthalpy differential treatment, coil tube row number increase; Fan coil dry operation, without breeding ground for bacteria, health condition is good. And hotel building traffic density is not big, can adapt to this kind of air-conditioning system. So this design USES is the way of fan-coil unit plus fresh air system.
About the design of water system part, main consideration with programs and programs of distinction. With the program for the backwater system refers to through the length of each parallel loop are equal, if through the long line of resistance loss per meter close to equal, the pipe network resistance does not need to adjust to balance. But using the same program system need to add a process with tube, this will increase the construction difficulty, at the same time you increase the initial investment. While different program system structure is simple, don't need to increase the return pipe separately, so the initial investment will be smaller, but different program system for backwater in the opposite direction, and the resistance of the pipe will not be the same, result in system is difficult to balance, we can add the balance valve in the pipeline to get system stability.
Due to the floor of this building is less, the system is simple, and the hotel's design is not a luxury hotel complex system, so choose different programs of water supply system, so can reduce initial investment, at the same time meet the design requirements, have certain economic considerations
The design of the main resources for Lu Yao qing editor of "the practical heating air conditioning design manual", through the design manual record some of the type selection calculation method to determine the parameters and calculation of the design I need. At the same time, based on the calculation results for equipment selection. is the purpose of load calculation in order to eliminate indoor and outdoor factor formation of cold heat and moisture load in order to select reasonable air treatment equipment. The load calculation with the help of hongye hvac software for auxiliary calculation. By setting the function room, staff time arrangement, as well as room area and palisade structure parameters such as input, and adjusting the parameters of the lighting equipment, by the harmonic method to calculate the hot and cold load of air conditioning.
Drawing aspect mainly includes the air pipe and water pipe layout, design diagram and system total instructions.
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