020 Ersha Island MAN LAP FONG
Location: No.1 Qingbo Rd., Ersha Island, Guangzhou, Guangdong, China
Architects: Michelle Yip
Project type: Public cultural building
The project takes advantage of the relatively low temperature zone resulted from its location in the city’s green island facing the Pearl River, and draws in cool river wind through the overhead second floor in the southeast to make the public transport space more comfortable; Through analysis of sunshine, the southwest veranda is enlarged to provide building shading; Reasonably designed width-height ratio of the inner courtyard leads to self-shading of the building; The design value of Solar Heat Gain Coefficient (SHGC) toward south is 0. 33 and SHGC toward west is 0. 26, which are both lower than 0. 44 required by the Design Standard for Energy Efficiency of Public Buildings (GB50189-2015). The underground garage is equipped with an open-air garden to improve lighting and ventilation; The number of the rooms in this project is 25, whose daylight area is 8152.86 ㎡ with a proportion of 82.51%, which is greater than 80% of the proportion value required in the Design Standard for Daylighting of Buildings GB50033-2013. After noise tests, the north facade is closed to form a multi-function hall and the inner courtyard is enclosed to reduce sound interference from recreational activities to the north side of the school. Comfortability brings more outdoor activities and leads the activity space from indoor to atrium.
Through the overall layout planning of inner courtyard and outer square, the proportion of public space reaches 40%, and priority is given to the use of natural ventilation and cooling technologies to achieve north-south convection; The heat insulation performance of the outer envelope is calculated and meets relevant specifications; Suspended veranda shading and greening can reduce radiation and temperature of the facade, which is conducive to energy saving; The roof flower shelf is beneficial to heat insulation and energy conservation; In terms of equipment setting, energy-saving design is carried out for air conditioning system, lighting system and water supply and drainage system to reduce overall energy consumption: The annual total power consumption for heating and air conditioning is 24.91kwh/㎡, which is lower than 26.65kwh/㎡ of the annual total power consumption for heating and air conditioning of the reference building in Common Electrical Data of Buildings 19DX101-1 (National Building Standard Design Atlas). The high-efficiency water-cooled screw refrigeration unit is adopted, and the refrigeration coefficient of performance (cop) reaches 5.1; The total fixed load of indoor lighting is 66.38W/㎡, and the power consumption index of general commercial buildings is 60 ~ 150W/㎡. The annual power consumption of the building is 26.1kwh/㎡/year, and the building energy saving rate is 53.11%.
Through the rainwater collection system of the inner corridor, rainwater is used for greenery irrigation and garage washing after treatment; Frequency conversion and speed regulation water supply equipment and first-class water-saving appliances are adopted, and the terminal pressure is lower than 0.2Mpa. The project adopts high-efficiency water-saving urinals and toilets, which are in line with the requirements of National Standards of Water-saving Sanitary Ware “the maximum water consumption of high-efficiency water-saving toilets with single or double gears is not more than 4.0 liters and the average water consumption of high-efficiency water saving urinals is not more than 1.9 liters”, so as to save water. Organic ceramic plate, a recyclable building material, is adopted; Beam longitudinal reinforcement, column longitudinal reinforcement, foundation reinforcement and slab reinforcement all use HRB400, accounting for more than 70% of the total force reinforcement; Exterior verandah shading reduces the material of single function shading components, hence less environmental loads.