Solar power in green building

Introduction

The area of solar building in China increases dramatically after the reform and opening-up policy and economic development..It is helpful for the national economy which maintains a sustainable, rapid and healthy development if we seize the opportunity to promoting building energy efficiency. The solar building has a good prospects and brilliant future which can help our country to realize the national development of the second step and the third step in the strategic target, and guide our country construction and architectural technology along with the world’s trend.

Breakdown of the incoming solar energy

Passive solar power

In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer.

Elements of passive solar design, shown in a direct gain application

Active solar power

Active solar power is any solar power device that incorporates a mechanical device for it to operate. In solar building, it means the whole or part of the application use new technology ,like solar photovoltaic and solar thermal technology for the building to provide energy

Reviews of research situation at home and abroad

• The United States pays a great attention to the development and utilization of solar energy. It takes effective measures to invest a lot of money on the research of solar energy utilization and the congress of United States made preferential policy that reduce tax for buyers of solar system. United States is a leading position in the world, and forms a complete solar building industrialization system in the domestic .

• The research on active solar building in Japan makes a great example on the world. According to the “sunshine project” which formulated in 1974,Japan built a number of typical solar energy heating and air conditioning experimental building . Such as the Yazaki Experimental Building.

Introduction of the key technologies

• Solar photovoltaic panels • Solar wall• Solar heating• Solar water heater

Solar photovoltaic panels

The combination of photovoltaic and architecture has the following two ways.One is BAPV(Building attached photovoltaics )The other one is BIPV(Building integrated photovoltaics).For instance integrating solar photovoltaic cells,glass curtain wall, window glass and roof tiles, so that it can not only develop and apply the new energy, but also decorate landscaping.

An example:

"Shanghai Eco-House" emphasizes the integration of ecological housing design, highlighting the amorphous silicon thin film photovoltaic power generation system which is a technical highlights of BIPV. “Shanghai Eco-Home” Pavilion is only case of entity entered finally into Urban Best Practice Arca in Shanghai World Expo, which displays scientific and technical technology level of intelligent residential buildings and will become advanced sustainable education base and domestic and foreign communication platform by using eco-design skill and 10 eco-technologies.

Solar wall

The heat slowly passes through the massive wall, and arrives at the inside surface of the wall several hours later to provide heat in the evening.  The glazed covering on the outside of the wall reduces heat loss, and allows more heat transfer to the inside space. The vents shown at the top and bottom of the wall in this diagram are optional -- they allow heat to be transferred to the living space earlier in the day than occurs with an unvented solar wall.

Solar heating and solar water heater

The principle of solar water heater in the building is to set solar heated apparatus on the top layer, using the water pump, water tank, auxiliary to supply hot water .The figure shown above is a flow chart show the theory of solar water heater system.

Conclusion

• Building energy consumption in China has accounted for about 45% of the final energy of the society. If the building can reduce energy consumption by 50% during the process of using, then it can make a contribution that can reduce 14% of the final energy of the whole society.

• So solar energy combination building is an inevitable trend in the future of China. It is also an important developmental direction in the world .

Contact Me--Mike S RobinsonWebsite: http://www.zerodown.solarPhone: 808-343-5402Email: mike@solarwavehawaii.comAddress:7040 Hawaii Kai Drive Suite 26183 Honolulu HI. 96825