Contractor

Name : 中建科技集团有限公司

Contact : [email protected]

 http://ccstc.cscec.com/

Construction Manager

Name : 中建科技成都有限公司

Contact : [email protected]

 http://ccstc.cscec.com/

Owner approach of sustainability

This project attempts to explore the development direction of future buildings by integrating four technical systems of prefabricated buildings, ultra-low energy buildings, green buildings and intelligent buildings. It is the first ultra-low energy public building project with the prefabricated concrete structure in China and is the demonstration project of the national key R&D plan for the "13th Five-Year Plan" period. This project has obtained the “Sino-German Cooperative High Energy Efficient Buildings-Passive Low Energy Building Quality Label" jointly issued by the Ministry of Housing and Urban-Rural Development of China and German Energy Agency and the three-star green building design label.

From the dimension of green construction, this project has realized the standardization design, factory production, assembly construction, integrated decoration and information-based management. This project adopts green construction approaches such as prefabricated construction and prefabricated decoration. With the application of precast concrete facade panel, concrete composite slabs with lattice girders , precast stairs and precast columns, the assembly rate reaches over 60%, resulting in less use of building materials and less energy consumption of equipment in the construction phase. From the dimension of green building performance, the project follows the basic principles of green building and passive construction, adopting technical measures such as high-performance transparent enclosure structure with heat preservation and heat insulation, high performance system of outside doors and windows, envelope thermal bridge treatment technology, high air tightness technology, high efficiency air heat recovery systems and renewable energy use. A variety of innovative and advanced energy saving technologies are integrated to create a healthy and comfortable indoor environment. The project will become a benchmark for high-quality and energy-efficient buildings and play an exemplary role in the application and promotion of prefabricated buildings and ultra-low energy buildings.

Architectural description

This project puts forward the technical solution of ultra-low energy consumption buildings for hot summer and cold winter areas. One goal of the project is to reduce resource consumption during the building construction and operation while creating a healthy and comfortable indoor environment, which includes: 1) Appropriate temperatures, 20-26 ℃, compatible with human needs, so as to stay away from air conditioning-related diseases; 2) Appropriate humidity, 30%~60%, no indoor dew and mildew, no dry skin in four seasons, no breeding and transmission of bacteria and viruses; 3) Fresh air, CO2 ≤ 1000PPM, reducing the risk of allergies and respiratory diseases; 4) More quietness, noise level ≤ 40DBA in the day and ≤ 30DBA at night, which is conducive to sleep and improving work efficiency. While the indoor environment requirement is met, the energy saving rate of this project reaches over 80%.

The office building and the apartment building of this project respectively adopt frame structure and shear wall structure. The project also puts forward the integrated solution of no hot and cold bridge, high air tightness and heat preservation and insulation in the prefabricated buildings in hot summer and cold winter areas, and proposes the indoor waterproof and steam insulation solution, adopting new waterproof and steam insulation materials with high reliability and durability.

This project adopts the prefabricated cold and heat source station supporting prefabricated buildings. The assembly machine room is divided into module units according to functions. Based on BIM technology, corresponding equipment and piping fittings are integrated around the main machine, with the heat pump host at the core. In addition, each module unit should have a certain ductility to ensure installation space and future maintenance space.

This project adopts several green technologies, including composite ventilation, optical pipes, etc., and strives to achieve excellence in meeting the requirements of “Four Savings and One Environmental Protection”.

If you had to do it again?

Previously, some problems occurred, e.g., on-site construction time was extended and follow-up operation and maintenance was not in place, due to application of more new technologies and new products and fewer personnel who could understand on-site construction operation as well as later operation and maintenance, nevertheless, all the problems have been settled through on-site training and guidance provided by design and technical professionals.

Building users opinion

This project was completed and passed acceptance in December 2018. So far, the indoor air temperature of function rooms such as offices, exhibition halls, multi-function halls, restaurants, etc. can meet the comfortable temperature requirements. The temperatures of vestibular are appropriate in winters and summers. Ground source heat pump system and office air heat recovery system are running normally, which have reduced the operation cost effectively. The energy consumption of air conditioning has been greatly reduced thanks to the integrated design, installation and operation management of heat and cold sources. Since it was put into use, the HVAC system has been operating normally and in good condition, meeting the demand for working, meeting, exhibition, etc. The light pipe system is adopted in the exhibition hall and the lecture hall on the first floor, which contributes greatly to improving the light environment of the section. Efficient envelope structure and excellent air tightness ensure the excellent sound environment of the project, basically not affected by the production noise from the adjacent prefabricated plant.

Energy consumption

• Primary energy need : 101,30 kWhpe/m².年
• Primary energy need for standard building : 208,00 kWhpe/m².年

Calculation method : Primary energy needs

• Final Energy : 40,90 kWhfe/m².年
Breakdown for energy consumption :

HVAC：18.98 Kwh/m2/year
General lighting socket equipment：14.64 Kwh/m2/year
General power equipment：/
Others：7.23 Kwh/m2/year

Envelope performance

• Envelope U-Value : 0,34 W.m^-2.K^-1
More information :

The U value of the exterior wall of the office building is 0.34W/(m2·K), the U value of the exterior wall of the apartment building is 0.38W/(m2·K); the U value of the roof of the office building and the apartment building is 0.18W/(m2·K); the ground U value of the office building is 0.26W/(m2·K); the ground U value of the apartment building is 0.25W/(m2·K); and the U value of the exterior doors and windows of the office building and the apartment building is 0.8W/(m2·K).

• Building Compactness Coefficient : 0,39

Indicator : GB/T 7106-2008

• Air Tightness Value : 0,51

Real final energy consumption

Real final energy consumption/m2 : 32,76 kWhfe/m².年

Year of the real energy consumption : 2 019

Systems

Heating system :
• Geothermal heat pump
• Fan coil
Hot water system :
• Heat pump
Cooling system :
• Geothermal heat pump
• Fan coil
• Radiant ceiling
Ventilation system :
• Natural ventilation
• Double flow heat exchanger
• Canadian well
Renewable systems :
• Heat pump (geothermal)
• Renewable energy production : 9,36 ％

Smart Building

BMS :

Intelligent monitoring platform is set up to manage the intelligent control system of the whole building. Through BIM and interactive monitoring of the building environment and control of the building equipment, the start-up and shutdown, air flow, wind speed as well as air supply temperature and humidity of equipment such as fresh air unit can be automatically controlled according to the indoor CO2 concentration. At the same time, the monitoring system can be used to monitor and display the temperature, humidity, PM2.5 and other parameters of each room indoors in real time. Independent sub-item metering, automatic meter reading and data analysis are realized in all energy consumption processes within the building such as cold and heat source, transmission and distribution system, lighting, hot water for living, the sockets, etc.

Urban environment

(1) Public transportation

The transportation of this project is very convenient. There is a bus stop at 654m walking distance from the entrance and exit of the project, which is Xinxing Industrial Park Station with Bus 573 and Bus t36. There is a pedestrian passage between the main entrance and exit of the project and the bus station. In line with the principle of rational allocation of resources and good logistics support for employees, a small shuttle bus will be arranged, running between Lianshanpo Metro Station and the company from 8:15 am to 6:15 pm. The bus type is Jinbei commercial bus.

(2) Public services and activities

This project has an exhibition hall of about 560m2 on the first floor, and a meeting room of 100m2. There is also a process model room on the project site, which gives a detailed description of the project's prefabricated ultra-low energy consumption design, construction and operation. In line with the principle of sharing experience and open communication with educational and research institutions from all walks of life, the exhibition hall, the process model room, and the large meeting room on the first floor are open to the public. Schools, associations, and groups are welcome to make phone calls to schedule a visit or a small seminar. The project has successfully carried out twice "China Ultra-low/Near-Zero Energy Building Public Day" activities organized by the passive ultra-low energy building branch of China Association of Building Energy Efficiency, and the Sino-German energy efficiency improvement technology and application demonstration exchange activity jointly organized by China’s Ministry of Housing and Urban-Rural Development and the Industrial Development Center as well as German Energy Agency.

(3) Green environment

1) Ecology and landscape

In combination with the current site situation, the project plans to create a garden-like landscape environment, and grow plants that adapt to the local climate and soil conditions, e.g., a combination of trees, shrubs and grass, and non-toxic and easy-to-maintain native plants suitable for the southwestern region, such as camphor, begonia, etc.

2) No light pollution in architectural and lighting design

Located in Xinxing Industrial Park, Tianfu New Area, the project is adjacent to no residential buildings in the surrounding area. There is no glass curtain wall in the project, and the visible light reflection ratio of the external windows is 0.15. In lighting design, high pole lights are used next to the office building, with lampshades and reduced lighting power. Simple night scene lighting is designed to ensure night safety, and causes no light pollution to buildings nearby.

3) Wind environment

Through simulated calculations, under the conditions of typical wind speed and wind direction in winter, the maximum wind speed at 1.5m from the ground in the pedestrian area around the building is 2.0m/s, the average wind speed is 1.0m/s, and the wind speed amplification factor is 1.62. Except for the first row of buildings facing the wind, the maximum wind pressure difference between the windward side and the leeward side of the building is 2.3Pa. Under the conditions of typical wind speed and wind direction in transition seasons and summer, there will be no vortex and windless area in the human activity area in the project. In terms of the external windows, the area ratio of the openable external windows where the indoor-outdoor surface wind pressure difference is greater than 0.5Pa reaches 83.14%.

4) Acoustic environment

Noise will come from the factory in the industrial park when mixers, conveyors, transport vehicles, water pumps, straighteners, bending machines, shears and other equipment are in operation. After noise reduction measures are taken such as reasonable general layout, vibration reduction, sound insulation, and noise reduction, the operating noise within the factory boundary can meet the Category 3 requirements of "Emission Standard for Industrial Enterprises Noise at Boundary". A distance between the R&D center and the factory building will also reduce a certain amount of noise. In addition, good air tightness and sound insulation performance of the R&D center’s outer windows and outer building enclosures also contribute largely to the reduction of noise interference.

Land plot area

Land plot area : 6 751,60 m²

Green space

Green space : 26 890,40

Parking spaces

There are 87 parking spaces for motor vehicles on the south and west sides of the project, and 100 parking spaces for non-motor vehicles near the dormitory of the shift building, with protective measures against wind and rain.

Product

Building airtight materials



北京中核北研科技发展股份有限公司

[email protected]

 http://www.bjzhby.com/


Product category :

sealing material

LEAC acrylic polymer cement waterproof coating is a two-component waterproof coating composed of special waterproof acrylic polymer emulsion and special powder. The product is an acrylic polymer product, without plasticizers and film-forming additives, and has excellent water resistance and weather resistance. Its advantages are: water-based environmentally friendly products, no lap joints after completion of construction, full-adhesive materials, good weather resistance, strong freeze-thaw resistance, good UV aging resistance, suitable for all building climate areas in the country, good water resistance, good elasticity, cold coating of water-based materials, and strong adhesion or adhesion with common building materials.

Fabric air supply system



织物空气（青岛）科技有限公司

[email protected]

 http://www.fabricair.cn


Product category :

HVAC system

A kind of flexible air distribution system woven from special fibers, the fabric air supply system is mainly used to replace traditional air supply pipes, air valves, diffusers and other air supply systems, and has been widely and flexibly applied in a variety of spaces, such as commercial places, sports venues, food production places like food factories, supermarkets and other business places. It can be directly connected to the outlet of fan equipment, or can be connected to iron ducts and composite ducts. The air supply system can be arranged according to the actual situation of the air supply site. Its advantages include no blowing feeling, uniform air supply, anti-condensation, easy cleaning and maintenance, light weight, quiet operation, simple and flexible installation.

light pipes



威卢克斯（中国）有限公司

[email protected]

 http://www.velux.com.cn/index.html


Product category :

Lighting equipment

VELUX's patented SunCurve solar collector captures sunlight and blocks ultraviolet rays. It has high-efficiency Miro Silver mirror reflection with a reflectivity of up to 99%. It is coated in a vacuum environment and has a longer life. Multi-layer protective film can effectively prevent falling off and corrosion. Excellent diffusion effect maximizes the lighting coverage area. A variety of lighting methods are available to present a variety of interior effects.

Vacuum insulation board



中亨新型材料科技有限公司

[email protected]

 http://www.vokesi.com/


Product category :

Insulation Materials

HVIP aerogel vacuum insulation board is a core material containing many nano-voids (aerogel fumed silica, a nano-porous material with an average particle size of 10-20nm) insulation board, encapsulated in a high barrier film, and then manufactured through a vacuum process. It is characterized by good thermal insulation performance, safe fire performance (A grade), good system stability, thin thermal insulation system, long service life, energy saving and environmental protection.

Construction and exploitation costs

• Cost of studies : 5 520 000 ¥
• Total cost of the building : 35 270 000 ¥

Energy bill

• Forecasted energy bill/year : 225 700,00 ¥

Real energy cost/m2 : 51.18

Real energy cost/Work station : 1128.5

Building Environmental Quality

Water management

• Consumption from water network : 2 033,66 m³
• Consumption of harvested rainwater : 104,58 m³

Water Self Sufficiency Index : 0.05

Water Consumption/m2 : 0.46

Water Consumption/Work station : 10.17

Indoor Air quality

Indoor CO2 concentration (mg/m3): 500-1000 mg/m3

Indoor PM2.5 concentration (μg/m3): 15-50 μg/m3

Comfort

Calculated thermal comfort : 一月份室内平均温度：19.7℃ 室内平均湿度：35.8% 七月份室内平均温度：26.5℃ 室内平均湿度：67.4%

GHG emissions

• GHG in use : 25,40 KgCO₂/m²/年
Methodology used :

Refer to the National Standard “Standard for building carbon emission calculation” GB/T51366-2019

• GHG before use : 25,89 KgCO₂ /m²
• Building lifetime : 50,00 年

, ie xx in use years : 1.02

Refer to the National Standard “Standard for building carbon emission calculation” GB/T51366-2019