Economic analysis of the influence of “three glass and two cavities” curtain wall on energy consumption of air conditioning system in super


Table 4.2 Calculation results of zoning air conditioning load 4.3 The air conditioning cold and heat source system is configured in the form of water-cooled multi-split system outside the office tower; The cold source of the air conditioning in the rest of the office is the electric refrigeration chiller, and the heat source of the air conditioning is the gas vacuum hot water unit.

The glass curtain wall adopts the configuration of ultra-white three-glass two-chamber double-laminated glass (8+1.52PVB+6 (Low-e))+12A+8+9A+(6+1.52PVB+6), with a total thickness of 34mm.

The standard floor plan of the office tower is shown in Figure 1.1.

Refer to the common single insulating glass system used for building glass curtain wall, and according to the requirements of Zhejiang Province standard “Technical Specification for Application of Building Doors and Windows” [2], the glass adopts the configuration of (8+1.52PVB+6 (Low-e))+12A+(6+1.52PVB+6), with a total thickness of about 26mm.

The thermal performance parameters of the enclosure structure of the design building and the reference building are shown in Table 3.1.

The cooling and heat source configuration of the air conditioning in the design building is as follows: the outer area of the office tower adopts a water-cooled multi-split system with a host capacity of 3898kW; Three 3165kW centrifugal water chillers+two 1161kW screw water chillers are used as the cold source in other office areas; Three 2800kW gas-fired vacuum water heater units are used as the heat source of office air conditioning.

High efficiency: the factory assembly plate can be directly put in place at the site, and the adjustment and installation are completed.

Low energy consumption The heat transfer coefficient of the three-glass two-chamber glass curtain wall selected in this paper can reach 2.1W/(m2.

Other parameters, such as building shape, size, orientation, window-wall area ratio, internal space division, use function and other thermal performance parameters of enclosure structure except glass curtain wall, are consistent with the design building.

Table 4.1 Air conditioning indoor design parameter 4.2 Air conditioning load calculation results are obtained by hourly air conditioning cooling and heating load calculation by Huadian Power Calculation Software, as shown in Table 4.2.

Here we will build your “honeycomb of thought” editor: this paper analyzes the scheme economy of the air conditioning system of the super high-rise building using the “three glass and two cavity glass curtain wall system”.

The structural diagram of three-glass two-chamber glass and ordinary single-hollow glass is shown in Figure 3.1.

The heat at the water ring side of the water-cooled multi-split system in winter is provided by the gas-fired vacuum water heater unit.

The annual load calculation results of the outer area of the design office tower and other office areas are shown in Figure 5.1, and the annual load calculation results of the outer area of the reference office tower and other office areas are shown in Figure 5.2.
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According to the calculation results of air conditioning load, the design of air conditioning cold and heat sources for the design building and the reference building are carried out respectively.

Too long to see the conclusion# 1 Research object The research object of this paper is a high-rise office tower and its podium in Hangzhou.

See Table 5.3 to Table 5.10 for details.

The content is relatively complete and shared for reference and learning.

The chilled water supply and return temperature of the chiller is 6-13 ℃, and the cooling water supply and return temperature is 32-37 ℃.

The construction site adopts the bottom-up installation method, which can cooperate with the civil construction and improve the efficiency.

The thermal performance of the building envelope can meet the requirements of the Design Standard for Energy Efficiency of Public Buildings (GB50189-2015) through the tradeoff calculation of the thermal performance of the building envelope.

Refer to the configuration of building air conditioning cold and heat sources as follows: the outer area of the office tower adopts a water-cooled multi-split system with a host capacity of 4746kW; Three 3517kW centrifugal water chillers+two 1161kW screw water chillers are used as the cold source in other office areas; Three 2800kW gas-fired vacuum water heater units are used as the heat source of office air conditioning# 5 Energy consumption analysis of air conditioning system 5.1 Calculation parameter setting of annual energy consumption of cold and heat source host 5.1.1 Frequency ratio of cold and heat load According to the annual load calculation results of Huadian Power, the frequency ratio of cold and heat load of the design building and the reference building are calculated respectively.

The heat of the water-cooled chiller and the condenser of the water-cooled multi-split host is released from the cooling tower to the outside.

Figure 1.1 Plan of the Standard Floor of the Office Tower # 2 Curtain Wall System Introduction 2.1 Features of the three-glass two-chamber curtain wall system The three-glass two-chamber glass curtain wall has the following characteristics: high quality: high waterproof performance: advanced structural measures are adopted to ensure that the air tightness reaches level 4, which is higher than level 3 required by the national standard; The water tightness is level 4, higher than level 3 required by the national standard.

Table 3.1 Thermal performance parameters of the enclosure structure of the design building and the reference building Figure 3.1 Schematic diagram of the structure of the three-glass two-chamber glass and the ordinary single-insulated glass Figure 3.2 Analysis method for the air conditioning load calculation results of the design building and the reference building, respectively, the air conditioning cooling and heat source configuration, and according to the frequency ratio of the cooling and heating load calculated from the annual load The annual energy consumption of heat source host and the initial investment of cold and heat sources are calculated and analyzed, and compared with the cost increment of glass curtain wall, the static payback period and dynamic payback period are calculated# 4 Air conditioning load calculation results and air conditioning cold and heat source system configuration 4.1 Air conditioning indoor design parameters are selected according to comfort requirements, as shown in Table 4.1.

Factory fabrication and on-site installation to ensure better processing and construction quality.

2.2 Performance comparison between “three-glass two-chamber glass” and “ordinary single-insulated glass” Table 2.1 Comparison between three-glass two-chamber glass and ordinary single-insulated glass Table # 3 Analysis method 3.1 Design building and reference building The design building in this paper is 249.90m office tower and its podium.

This paper studies the 54-story office tower and its podium with a height of 249.90m.

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The weight of glass curtain wall designed in this paper is about 30% more than that of the reference building.

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