The majority of green certificates appear on projects with high levels of investment, particularly with internationally certified certificates such as LEED, HQE, and domestic such as Lotus. So where are the small and medium works? Where do not apply the whole system of green certificates, architects and homeowners apply only a few green elements should focus on what factor? And the question that perhaps the most common architect from the host: “What will my family and I get when applying green elements in design?”
Over the past 10 years, green buildings have received a growing number of green credentials, including LEED, Lotus, Cerway HQE, Edge, and Certificate. Green building of the Vietnam Environment Association, Green Building Certificate of the Vietnam Architects Association …
The majority of green certificates appear on projects with high levels of investment, particularly with internationally certified certificates such as LEED, HQE, and in the country such as Lotus. So where are the small and medium works? Where do not apply the whole system of green certificates, architects and homeowners apply only a few green elements should focus on what factor? And the question that perhaps the most common architect from the host: “What will my family and I get when applying green elements in design?”
In order to convince medium and small-sized building owners to join the green design scheme (not necessarily a certificate), architects should point out the benefits to the owner. Private for each specific case. Therefore approach to small and medium works will be different works to be able to bring green elements straight into life.
Some architects have gone through the long-term research on microclimates, so that they can clearly understand the issues related to the sustainability of the building and the surrounding environment. This has led to the practice of sustainable design as a natural criterion in their products. The positive feeling and appreciation of the owner about the comfort, the comfort that the building has green elements bring is the greatest gift for the architect, and also the core “essence” to Green elements can spread far and wide in society.
In the context of a scientific paper, it can not simply quote the remarks of homeowners who lived in green buildings. Evidence from scientific data is needed and when the forecasting data matches the actual measurement data, the potential for calculating the design is very large. . From here can open a new direction in the design of houses or small works. For the average project, the cost of energy use will be of further concern because it is both a dwelling house and a rental property. All of these issues will be predicted by metrics rather than empirical predictions as before.
Please introduce some works that integrate green elements in Vietnam
Projects that integrate green elements
1 – Office Combined Housing -The building has been built
This is a work both at the first floor and second floor is used as office. The building was designed with the passive house criterion, which means the house does not use cooling equipment or heating. Architects mainly use local materials, which are available, undergoing little energy-intensive manufacturing.
Proper operation of the facility to ensure comfort in the home is also important, so the architect, also the homeowner, knows how to adjust the door system accordingly. With weather conditions. This operation should also be included in the simulation process, as briefly as follows:
A) Doors on the 1st floor: The outside temperature is in the range of 17-33, completely open the air gap
B) 2nd floor door: The upper part of glass, when the outside temperature exceeds 32oC, will pull the screen.
C) Low window ventilation at 2nd floor: Open at 17-30 ° C. When the outside temperature is higher than 30oC and the internal temperature is higher than outside, it will open.
Similarly, in the first floor bedroom, the reader can see clearly the higher temperatures distributed mainly on the outside wall and the air layer at the door area, the room temperature is about 29.2 ° C, enough to create Comfortable micro climate with only a small fan.
Advanced housing – Research on the possibility of building zero energy housing in HCMC
This is a high-end, high-end and high-rise residential project that is expected to become a zero enegy project. Initial research results are also very energy-efficient. A few simple solutions initially showed that the building reached the energy level of the passive building (less than 15 kWh / m2.year), resulting in 4.75 kWh / m2.year. Due to other reasons, it is out of the design process that deep research, as well as construction execution has been halted. But in terms of expertise, the design team thinks that implementing private housing up to eight floors with zero energy is not too difficult to do in Vietnam.
In order to reach Net Zero Energy’s goal, an appropriate strategy for the design phase is needed, the strategies outlined initially include the following:
– The thermal delay of heavy wall blocks is utilized to cool the daytime heat
– Consider using geothermal in case the heat mass and insulation do not meet the needs of comfort. The air entering the house will be led underground for heat exchange before entering the house
– Low-g glass window, sound insulation: The works in Vietnam mainly use low-g glass low level, difficult to ensure comfort, only low-e glass new high thermal barrier blocking but still Let more light see through.
Automatic shutdown and sunshade: Intelligent control components will be programmed based on optimized results when simulating energy with different operating scenarios.
– Wind power generation from Maglev equipment: The new generation wind turbine equipment using magnetic spindle shaft should operate with very high efficiency due to almost no rotation axis friction.
– Solar Cell System: Make the most of solar energy and the extremely high number of sunshine hours in HCMC to create electricity, which can be combined with a navigation system.
– Advanced lighting system: Use high quality LED system to illuminate. This system combines with intelligent sensors and controls to optimize the lighting, minimizing the use of electricity
– Ceiling fan automatic control: simple solution, but high efficiency to ensure the convenience of use
– Small air-conditioning system with high efficiency, combined with hot water heater
Temperature at 6th floor, bedroom The library at 6th floor has a clear temperature change when utilizing insulation and heat mass. When not insulated as conventional construction, the highest temperature in the room is 34.8 C, in turn applying type 1 and 2 in the calculation, the temperature changes to 33 and 30.7oC respectively. Type 2 is heat-insulating but at the same time utilizing thermal mass. Further calculations by CFD show that the room air temperature falls to about 29 ° C