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Design General Information
This design for the Shanghai sheng high building air conditioning system, proposed for the reasonable design of central air conditioning system, provide a comfortable working environment for indoor staff. Building a total of seven layers, two layers of underground. A layer for the market, for more than six office building. A total construction area of 7791 m, a layer of clear height of 4.5 m, the rest is 3.75 m. Among them two to five layer design is the same, air conditioning layout is the same. Require the use of air conditioning refrigeration heating in winter in summer. Design of fan coil units, air to air conditioning system to system, chilled water and cooling water cooling unit system, rely on the city centralized heating in winter.
With the increase of high-rise buildings, the central air conditioning usage is also increasing, more and more big, the proportion in the whole building energy consumption the blower run frequently under the design capacity, but most of the time in the daily operation of the actual load is only 70% of the design load, so the energy saving operation is especially important. Shopping malls, office buildings and other areas of the air conditioning load changes over time there will be a big different, such as night due to staff leave, need the actual air volume peak of air volume is far less than the day staff. Based on the needs of real-time air volume, and respond to the fan control management, with the change of blower speed to change air output, can make the delivery changes along with the air conditioning load, achieve energy saving effect, which adopts variable air volume (VAV) system, frequency control of motor speedCombine in offices, commercial building is common in many of the cities construction, is a kind of typical public buildings, along with the economic development, the number and the total construction area of rapid growth. The class building hvac system has a very good representative. Air conditioning system in create a comfortable environment at the same time, also in consume large amounts of energy. According to the U.S. for public buildings and residential building energy consumption statistics, one quarter of building energy consumption for air conditioning and the average energy consumption of central air conditioning system in our country is about accounts for 50% of the whole building energy consumption. As public buildings, high energy consumption of the hvac system energy efficiency has great potential, to achieve energy conservation and emissions reduction has important and far-reaching significance. Hvac system has a lot of energy efficiency measures, ice storage.
The principle of the design of air conditioning water system: strive for hydraulic balance; Prevent large flow small temperature difference; Water coefficient to conform to the requirements of the specification; Variable flow system appropriate USES frequency conversion adjustment; To deal with the expansion of the water system and exhaust; To solve good water treatment and water filter; Pay attention to the pipe network of cold and heat preservation effect. Water hydraulic balance system design should strive for each loop.
Indoor air conditioning wind system design principle: can guarantee required parameters, namely under design conditions and operation conditions can guarantee to fulfill the requirements of indoor temperature, relative humidity, and purifying. Initial investment and operation cost are combined more economy; As far as possible to reduce a system within each room adversely affect each other; To minimize the length of duct and duct overlap, convenient for construction, management and testing. System shall conform to the building partition. Each room and the design parameters and heat than phase close to the pollutants, the same can be pided into a total air system. For constant single duct system, also requires that work at the same time, same as load change rule. General civil construction of the whole air system should not be too big, otherwise the duct layout difficult.