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環境・エネルギー論 18 November 2009 REEC-IFOST2009 21-23 October 2009 Ho Chi Minh City. About Strategic Technology for Sustainability in Asian Countries. KEIO UNIVERSITY, JAPAN PROF. HARUKI SATO.
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環境・エネルギー論 18 November 2009 REEC-IFOST2009 21-23 October 2009 Ho Chi Minh City About Strategic Technology for Sustainabilityin Asian Countries KEIO UNIVERSITY, JAPAN PROF. HARUKI SATO
A practical viewpoint for designing a large and complicate system as a measure to global warming in Asian countries will be proposed. BackgroundPhilosophical viewpoints; Global warming New concept of energy: the valueA concept for advanced thermal energy utilization based on energy value New concept of education: system design V model research of Energy Environment Systems Center for Education and Research of Symbiotic, Safe and Secure System Design, 2008-2012 Global Centers of Excellence (MEXT Program in Japan)
What is Sustainable Society? (My viewpoint) Person and Society Person and Nature Global warming Energy resources Global warming Energy resources Sustainable society Water circulation Renewable energy Reducing CO2 Nuclear power & Renewable energy + Low carbon society Recycling & Symbiosis Single Viewpoint for Person Double Viewpoints for Person & Nature
Objective of Strategic Technology is to build Interface Environment. forcus 1=person : forcus 2=nature Interface Environment Cities Artificial nature Wild Nature Within Buildings 人工内部環境 Heat island Global warming water+food+energy resource
What is the relations among them? Air temperature and fossil fuel consumption Sea level / mm = 1.7 mm/year
Carbon in the air: 7.6 × 1011 t +3.2× 109 t/year Net absorption in land −1.0× 109 t/year Absorption in the sea −2.2× 109t/year Emission from fossil fuel +6.4× 109 t/year Emission from land +1.6× 109 t/year Absorption in land −2.6× 109 t/year Carbon in land 2.3 × 1012 t Carbon in total fossil fuels 3.5 × 1012 t Carbon in the sea 38 × 1012 t Reduce CO2 Emission + Develop Double Forests CarbonCyclingin1990s HP of Japanese government:http://www.rinya.maff.go.jp/seisaku/sesakusyoukai/ondanka/a-2.html Based on the IPCCFourth Assessment Report
When the mass of water on the globe is constant, the ratio of water • in land and in sea would be important for deciding the sea level. • Forest is providing oxygen and absorbing CO2 with controlling the • humidity and temperature of air, by getting solar energy and water. • It provides us many important materials.
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Terrestrial equator How much mass of carbon and water can be stored on/in the land?
Importance of woods & waterIn Asia, we have woods & water & solar energy. 1.Global warming and sea-level increase: not only reduction of CO2 emission but also global water management (by keeping woods) 2.Renewable energy resource: bio-ethanol, solar, and wind (by keeping woods) 3.Securing water: securing sanitary and quality life: 300 L/(day Japanese) securing food and cloths: 1000 L/(day Japanese) securing woods: ∞ L/day on land
Need Clear Concept on Thermal Energy(Global warming is a problem of TEMPERATURE.)
Solar energy : waste heat Why the water in Tokyo Bay is not Boiling or keeping almost same temperature? ●Power plants (27 GW) ●Steel plants ●Gas plants ●Oil plants ● Ship factories ● Automobile factories Tokyo bay 104 m× 104 m = 108 m2 Insolation 0.5 kW/ m2 50 GW 東京湾環境情報センター http://www.tbeic.go.jp/kankyo/sangyo.asp 火力発電所設備概要 http://www.tepco.co.jp/tp/list/index-j.html
Sea water 1 atm = the mass of the air 1 kg/cm2 Av. sea depth = the mass of water 400 kg/cm2 Heat capacity of water is four times of air. On the globe, heat capacity of sea is almost three orders of magnitude greater than that of the air. IPCC predicted 0.74 K increase in the air for 100 years. By using water circulation, keep clean the air and don’t heat the air; make lower temperature on the surface; and cool the air by water circulation in the air.
Pressure / mbar Altitude / km Temperature / K Air: Global Warming Average of surface temp. will become higher. S.Manabe and R. Wetherald J. The Atmospheric Sciences Vol. 24, No. 3, pp. 241-259, (1967). They calculated the possibility of climatic changes 42 years agofor the effect of a. water vapor b. carbon dioxide c. ozone d. surface albedo e. cloudiness.
No effect to the natural environment, when the temperature of waste heat is exactly equal to the ambient temperature. Thermal energy Q times (1− T0/T ) equals exergy ee=Q×(1− T0/T) • Many people are confusing ‘Energy is consumed’ but ‘Energy is conserved’. • The value of energy is consumed. The value of energy, we call the ‘exergy’. • Exergy makes work, which includes negative work to the environment. • What is the value? Above equation expresses the value in the quantity of Q. • The level of my talk Q is T. When your level is T0 , you can learne from my talk. • When we make temperature of heat to be lower by using water, temperature change of water is much smaller than the temperature change of air because the capacity and latent heat of water are greater than the air.
Learn water circulation in natural environmentSolar energy is more than 10,000 times greater than the energy consumption by people.We should recognize the power of the SUN. exaust heat from cooling tower Transpiration (water vaporization) exhaust heat from indoors sensible heat from wall dry soil sewage retaining water high temperature lower temperature
Heat Island in Cities Tokyo Average Temperature of Cities in deg.C New York Paris Tokyo New York Paris World average Japan Meteorological Agency (March 2007) http://www.data.kishou.go.jp/climate/cpdinfo/himr/2006/himr2006.pdf
<maximum 8 kW solar energy> <maximum 2 kW solar energy>
Open Amenity Space Energy consumption of cooling tower would be less than 1/5 of air-conditioning system. No high-temperature exhaust heat and provide water to the air like trees.
Trans-piration Energy conservation Energy consumption Within artificial environment Wild Nature Highly sophisticated information tools for communication Solar thermal panel and cell Space of Interface-environment Storing rain-water minimum completely conditioned space keeping to be gentle symbiosis nature safe andsecure
Renewable Energy Utilized Amenity Space Solar chimney Cooling tower
Harmony with multi-disciplinary fields= System design(creation of a large and complicate system)(creation of a comfortable and secure space)
Role in University Government Dream (Advanced Tech. & 30 years later) Reality (mainly several years later) Industries Engineering Academics Science Students Students will change dreams to the reality.
Science Engineering Gives Dream Changes to True (Possibility) (Reality)
V model research Energy-Environment Systems Laboratory (Haruki Sato Laboratory) Practical Engineering Fundamental Science Thermal-Fluid Properties PVT Cp C.P. Intermolecular Potential Parameters Exergy concept Transpiration Decompressed boiling Statistical analysis/modeling/simulation Monte Carlo MethodEnergy Management Open Amenity Space Interface Environment Steam Table Refrigerant Table Desalination Cool Solar Panel Renewable Energy Assisted heat pump Cluster Energy Supply Prediction of Energy Demand Modeling of Electric Appliances Vision Learning nature Break through Information Creation Thermodynamics Method Management Principle New Thermodynamic Cycle Heat Pump + Renewable energy Ejector cycle + Renewable energy About Strategic Technology for Sustainability in Asian Countries Haruki Sato, Keio University
Energy Environment Systems(Example of System Design on Complex System) Manager (vision) Leaders (System design) Energy utilization (Field 2:energy) Green IT (Field 3:IT) Secure・Safe (Field 4:risk) Green・Healthy (Field 1:person&nature) Field 5: Social science ・ Economics Project 1 Project 2 Field 6: Architecture・Civil engineering Project 3・・・ Field 7: Public relations and Communication Field 8: Practice & Work Support: Consortium
Water and Forest Cycle Symbiotic Society Learning Leaves and Live with Woods Change from Asian Countries More Woods in future 1.Recover natural Albedo (Albedo of forest is 0.2) 2.Recover water cycle on the globe 3.Lowest exergy to the Environment Cool environment with water Hot environment without water
International Workshop on Environment & Engineering Advanced Sustainable Cities 24 and 25 November 2009 Hiyoshi Campus, Keio University, Yokohama, Japan The Japan Society of Mechanical Engineers The 20th Anniversary of Environmental Engineering Division IWEE2009ASC