Where is the hottest green future

2022-08-06
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Where is the green future

floating cities on the sea will achieve negative carbon emissions

in the future, humans may live in floating cities on the sea. Those cities are like huge lotus leaves drifting on the Pacific Ocean. Each urban area can float freely or connect with each other to form a larger city. This is our green floating plan. Shinyuki Takeuchi, head of Shimizu Construction Co., Ltd., introduced to us at the Green Expo. This imaginative design sounds like a scene in the world of science fiction

it is reported that the green floating lotus after construction will be composed of units with an area of several square kilometers. The artificial ground on the sea will adopt a honeycomb composite structure, which can accommodate 10000 ~ 50000 people. A 1000 meter high water lotus tower made of ultra light magnesium alloy will be built on each unit. The temperature of the tower is comfortable, so the top is a residential area, which can accommodate about 4000 residents. The stem of water lotus is a vegetable cultivation area, the stamen is an office area and a commercial area, the petal is a residential and hospital organ, and the foundation is a grain planting area

the city can achieve complete self-sufficiency. Forests, green spaces, roads, water storage areas, agricultural plantations and aquaculture parks are included in this system. Through plantations, the city can achieve food self-sufficiency. The carbon dioxide emitted by the city can be absorbed by crops and other plants. Sewage and garbage can be used as fertilizer for crops. After purification, the drifting garbage island can make energy resources

in the future, the carbon dioxide emission of floating city on the sea will not only be zero, but also negative, because the plants in the city can absorb the carbon dioxide around it. The biggest theme of this design is green. Takeuchi said. According to the calculation that clean water has the same thermal and electrical conductivity as metal, rigidity and high-strength buildings, the lifestyle of the floating city on the sea will reduce the carbon dioxide emission by 40% compared with the land life, and each unit will not produce any waste. Each product will be recycled and utilized, and will be converted into energy through new green technologies

the biggest challenge of this idea is how to protect floating cities from extreme weather such as tides and tsunamis. To cope with the huge waves, we plan to use a strong and elastic membrane to closely connect the pools at the outer edge of the unit, creating a shoal 30 feet (about 9.14 meters) above the sea level, so that the pressure difference between the water in the pool and the external seawater can stabilize the movement of the membrane, so as to mitigate the impact of the waves. Takeuchi said that for the threat of lightning, we will install lightning rods around the central tower to deal with it. The dense lightning rod conductor on the outer wall will protect the safety of the tower when lightning strikes. In addition, the project also has certain structural planning and response measures for the escape and refuge on the floating city

smart cities shine with wisdom

we expect to build an interconnected system of social infrastructure such as energy, water treatment, transportation, environment and recycling under the condition of making full use of information and communication systems, that is, to minimize environmental load and reduce comprehensive social costs while maintaining the safety and comfort of our urban life. Before building the electronic model of smart city in Hitachi Group Exhibition Hall, the commentator described the vision of a smart city

it is reported that the new social infrastructure system brought by Hitachi to create an intelligent new city is the complete integration of the whole social energy (including water, electricity, etc.) and transportation. Similar to Singapore, its land transport authority connects the urban road information into a network, and then installs sensors and infrared devices to provide historical traffic data and real-time traffic information by optimizing the traffic signal system, electronic scanning system, urban expressway monitoring information system, articulated electronic eye and information system, so as to predict the traffic flow in the preset period. Citizens can check the traffic situation in the next hour through the Internet and on-board GPS, and choose the appropriate travel time and route

as a country with large population density, small land area and lack of various resources, Japan's sustainable planning for urban construction is one of the common R & D topics for its high-tech enterprises. In China, which is in the middle stage of industrialization, the trend of rapid expansion of urbanization has also been highlighted. It is predicted that by 2030, China's urbanization rate will reach about 65% and the urban population will increase to 900million. The electronic model of intelligent city also opens a green window for reference

similar to smart city, Toshiba group's concept of smart community. In this concept, Toshiba group has put forward various more detailed solutions. Among them, a new comfortable adjustment mode in the air conditioning energy-saving solution was praised by the audience. This solution can calculate the current comfort index in the air-conditioned room from six factors: temperature, humidity, radiation temperature activity, dressing volume and air flow speed, and update the temperature at any time

green city concept

develop green industry and support the green city dream

behind these amazing concepts, such as floating city on the sea, energy visualization and real-time traffic information query, are the bustling green industry and the rapid development of technical support

at this Green Expo, all the participating enterprises brought the latest green technologies. According to the concept, these technologies, with the full help of IOT, sensing and other means, involve many fields such as intelligent buildings, road monitoring, home care and digital life, and can achieve more effective urban services in the future. Among these ideas, informatization, effective energy utilization and carbon emission reduction are the key clues

cities should be green, which means pollution control, efficient utilization of resources and harmonious coexistence between man and nature

in view of China's huge development and emission reduction potential, the development of green cities in China is expected by the international community. Zhuang Guiyang, a researcher at the Institute of urban development and environment of the Chinese Academy of Social Sciences, said that China is in the process of rapid industrialization and urbanization. Making effective use of energy, formulating and implementing the green development strategy of Chinese cities, and strengthening urban public governance have become the focus of urban work, while promoting the proportion of new energy and other green energy in urban resources, and building a green transportation system, The development of green and energy-saving buildings will be an important part of it

taking green energy-saving buildings as an example, shinyuki Takeuchi of Shimizu construction company in Japan said that a 25 storey building with an area of 5365.24 square meters will adopt 10 clean technologies that have been put into operation, such as variable air volume control, large temperature difference water supply, and 4 new technologies such as energy management smart electricity that are being developed. Using this complete set of energy-saving and emission reduction system, the cost will be 5%~10% higher than that of ordinary buildings. However, because the technology itself can reduce carbon dioxide emissions, the cost can be recovered in 5-10 years

the development of green industry makes the dream of a green city seem closer and closer. The survey found that taking Baoding, Hebei Province as a typical case, some cities in China are relying on green industries and emerging technologies such as new energy and energy equipment to usher in a new development situation when exploring the way of green cities

circular economy has obvious benefits and needs to be developed.

at this exhibition, Japanese representative enterprises such as Toshiba, Hitachi, Panasonic and Sony all brought more advanced ideas and technologies in the field of circular economy. The exchanges between China and Japan have entered a deeper level

RONGTONG, member of the Standing Committee of Taiyuan municipal Party committee and vice mayor of Taiyuan, Shanxi Province, said that as the central city and resource-based city of the energy and heavy chemical industry base, Taiyuan is vigorously carrying out the construction of circular economy standard system in the industrial field, and carrying out standardization construction in all 11 systems, including coal mining and comprehensive utilization, steel and iron deep processing, electric power and power conversion, alcohol ether fuel cycle alternative energy, It has realized the transformation and upgrading of traditional industries and the cultivation and growth of emerging industries

Tangshan Municipal government officials also said that they should increase the development of circular economy and build Caofeidian Ecological Industrial Park into five bases, including green product production, energy conservation and environmental protection industry, vein industry, zero emission ecological industry and high-tech industrial base

the development of circular economy has become one of the indicators to measure the development of green cities

after more than 30 years of rapid development, China is facing severe resource bottleneck constraints and must carry out social development transformation. Circular economy is the introduction of ecological laws into industrial production. It takes the efficient utilization and recycling of resources as the core. Its economic benefits, environmental cleanliness, resource conservation and other social benefits are very obvious, which will contribute to social transformation and development

however, in view of the development of green cities, zuotieyong, academician of the Chinese Academy of engineering and a famous circular economy expert, pointed out that China has not done enough in circular economy. At present, China does not have a real eco industrial park. The core of eco industrial parks lies in recycling, just like human metabolism. However, some of our industrial parks focus only on terminal governance

prospects for green energy

breakthroughs in new energy technologies have widened the consumption field

it is a new direction for the development of solar cells to use indoor weak light for power generation. At the technical exchange meeting of the Green Expo on June 2, the person in charge of Sony said that dye-sensitized solar cells can be easily used indoors. This is a technology that can generate electricity under a desk lamp. No matter whether the weather is good or bad, the ability to convert light into electricity will not decline. However, the photoelectric conversion of crystalline silicon and thin-film cells will decrease significantly in rainy days. It is understood that this kind of battery does not use silicon as raw material, but uses dye molecules to absorb light energy and convert it into electric energy. It is called the third generation solar cell

technological breakthroughs have broadened the consumption field. The unique stability advantage of the third generation solar cells makes it possible to charge indoor solar cells, opening up a new field of consumption. Sony Group Vice Chairman nakapo Liangzhi said

the collector tube that can withstand a high temperature of 450 ℃ has also attracted much attention on the linoritte booth. Solar thermal power generation will become a hot spot in the new energy industry. Hanjianmin, marketing department of renoriley, told us that the solar thermal power station is our ultimate goal, and we will strive to achieve a breakthrough in the field of solar thermal utilization in China

it is learned that the Guiding Catalogue for industrial structure adjustment (2011 version) recently issued by the national development and Reform Commission will be officially implemented on June 1. Among the new energy categories added to the encouraged category in the guidance catalogue, solar thermal power generation has been placed in a prominent position. Industry insiders believe that this means that during the 12th Five Year Plan period, the state will vigorously promote solar thermal power generation and related equipment manufacturing in terms of industrial policies

in the future, smart electricity is indispensable.

Shimizu construction, known as the leader of zero emission buildings, has developed building energy management system and smart electricity (BEMS) since 1972. In 2003, the new headquarters of Shimizu Technology Research Institute built with BEMS achieved a carbon emission reduction of 40% compared with its main building. In 2008, in a project cooperated with the University of Electronic Science and technology of China, the solar power generation ratio reached 50% through smart electricity

at this Green Expo, smart electricity can almost be called frequency of occurrence

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