Ground Heat Wastewater Heat 2007144362 이현준 2012144063

Ground Heat & Wastewater Heat 2007144362 이현준 2012144063 강병찬 2013144071 남동호 2013144025 배지성 2013144048 이영배 2013144084 장필재

Contents Mission 1 Geothermal & Wastewater Heat Strength and Weakness Misson 2 Application in Old Mega-City Mission 3 Application in New City(North Korea, Developing Country) New technologies

Mission 1 GEOTHERMAL & WASTEWATER HEAT ENERGY

Waste Heat Non-use energy source. In Korea, according to 2003’s investigation, 11. 7% of energy using the manufacturing industry was thrown out as waste water.

Temperatur item Kind of energy source form e (o. C) Amount of energy house 10 - 20 Little store air 10 - 40 Little Bath house water 15 - 35 Little Swimming pool water 15 - 25 Little Skate rink air 15 - 30 Little Frozen storage Near to living Envirnment water air 15 - 35 Little-Medium Computer center air 10 - 35 Little-Medium underground shopping area Special Facility

Temperature Amount of (o. C) energy air 10 - 30 Medium water 10 - 25 Medium water 10 - 20 Little Sewage treatment plant water 15 - 25 Huge Refuse diposal plant item water 15 - 30 Huge factory water 10 - 80 Huge water 5 - 20 Huge Kind of energy source form subway substation An underground transmission line Public facilities company air, geothermal heat, sun. Nature light heat, underground water, sea water

Geothermal Heat – 1) Hydro Thermal System Cover pressure Underground water Geothermal fluid heat -Hydro-thermal system-

Geothermal Heat – 2) Binary System -Binary system-

Geothermal Heat – 3) Enhanced Geohermal System(EGS) -Enhanced Geothermal system-

Wastewater Heat Hot water circulation Condensor Compressor Evaporator Wastewater & cool water circulation Movement of refrigerant

Wastewater Heat Type Heat efficiency Plate Very good Heat durability Very bad maintenance Very inconvenient Continuous Big tube Bad depending on Convenient management rubbing is very difficult low efficiency because of this is high efficiency but Continuous depending on efficiency is low because big tube Shell&Tube Very good as time goes by, heat sludge rubbing is easy but management Small tube comments Convenient demands continuous rubbing because of small tube

Strengths & Weakness Geothermal Heat Wastewater Heat - eco-friendly and safety: Not use fossil fuel Not emission Co 2, Nox, Sox and decrease danger of fire Strength - economics: inexpensive cost of transportation and fuel - High efficiency : high efficiency than fossil fuel - stability : stable alternative energy uninfluenced by weather and climate Weakness - High unit one cost -Demand continuous - Limited construction place Management

Mission 2 APPLICATION OF ENERGY TECHNOLOGY IN OLD MEGA CITY, SEOUL

Feature of Old Mega City, Seoul Developments are almost Done. Lots of people and High cost of land. Therefore, It’s difficult to build new power plant.

< Usage of Land > As you see… full of house and building.

Feature of Old Mega City, Seoul Low using rate of renewable energy.

Feature of Old Mega City, Seoul And even among the renewable energy, Low rate of Geothermal energy

Distributed generation Now, trend of energy development is moving to Distributed generation rather than building large power plant. Distributed generation is small size of generation rather big generation like power plant or waterpower generation.

Government’s policy moving to distributed generation.

Distributed generation So…, In Old mega city, rather than large power plant, It is more reasonable to apply distributed generation system to already constructed building and new construction.

Case of using Geo-thermal and Wastewater heat <Garden five in Mon. Jung. Dong> By using 100 geo-thermal pipe(length of 200 m), generating 1400 k. W energy for heating.

Case of using Geo-thermal and Wastewater heat Dong Yang tax office -By using 20 geo-thermal pipe(length of 150 m), saving 35~75% energy and 1000, 000~3500, 000 won(6 million dollar) per year.

As we see the cases, rather than big power plant, small size of distributed generations are being done at each construction. When we look at the map, it would be difficult to plan large scale business for energy.

Applying to Old Mega City Key is Heat pump for using Geo-thermal and wastewater heat. Installation of pump at proper place and reusing wasted heat are main issue. As explained mission 1, heat pump is not just using heat exchange but also can extract heat from even cold water.

Operation of Heat pump

How can we apply Heat Pump? First, domestic sewage For Old Mega City, Because of large population, lots of domestic sewage are generated. As Seoul has high population density, Domestic sewage can be useful heat source.

Domestic Sewage Domestic sewage loose heat when it flow far from the source. So efficiency is high when heat pump is installed near the source(for example apartment, building)

Domestic Sewage <Housing units by Neighborhood> Black color means high population density It would be efficiency to use heat pump to such area.

Public bath

Public bath Now, policy is that Public bath should use wastewater heat exchanger, not heat pump. Heat of discharged wastewater is 26 °C, and still, by using heat pump, we can get additional heat.

What is the problem? As Seoul’s construction are almost done, for applying heat pump to already constructed old building, It takes a lot of money to install heat pump by digging ground vertically. If initial progress of construction contains installation of heat pump, that cost could be saved.

Mission 3 1) ZERO ENERGY HOUSE/BUILDING 2) APPLICATION IN KOREA 3) APPLICATION IN MONGOLIA 4) RISING TECHNOLOGIES

1) Zero-Energy House/Building Uses Solar, Wind, Geothermal. . . Etc Own Energy Generation, No CO 2 Generation Can be applied in new towns/cities

1) Zero-Energy House/Building KIER(Korea Institute of Energy Research) Under 150 m , research proceeding(Green Tomoorow)

1) Zero-Energy House/Building Ze. SH-II ( Hybrid System – Solar, Geothermal)

2) Site for Geo-Thermal Powerplant in Korea Temperature underground Heat content underground

2) Site for Geo-Thermal Powerplant in Korea Southeast Korea (Gyoungsangdo) Nearby Pohang Jeju island

2) Site for Geo-Thermal Powerplant in Korea Baekdu Mt. Dormant Volcano Similar and better than Jeju island Hot Spring Large region Japanese Geothermal powerplant Yamagawa powerplant Kagoshima powerplant

2) Baekdu Mountain for Geo-Thermal Powerplant Interview of KIGAM(Korea Institute of Geoscience and Mineral Resources) “ Baekdu Mountain is know as dormant volcano, which means there are regions where magma exists near the surface. Feasible geothermal energy generation is possible. “Baekdu Mt’s crust is thick, filled with hot components”

2) Site for Geo-Thermal Powerplant in Korea Jeongup, South Korea Samjiyon, North Korea

SWOT Analysis – Korea § Can generate energy 24/7 § South K: Need deep digging(->EGS) § No Pollution, Infinite source §North K: Not enough information § Easier than South Korea(North) §Negotiation between governments Strength § Development in technology §Sustainable energy landmark -> Diplomatic solution S W O T Weakness § Conflict with China § Needs assessment §Create Jobs Opportunity Threat

3) Site for Geo-Thermal Powerplant in Mongolia Many Hot springs High heat flow Suffering by air pollution Most of Energy by coal

SWOT Analysis – Mongolia § Can generate energy 24/7 § Low Technology § Lower digging § Environmental damage § Rich Geothermal Resources §Not enough Infromation (many hot springs) Strength § Development in technology § Lowers Air pollution S W O T Weakness § Conflict with Society §Far from powerplant § Needs assessment Opportunity Threat

Rising Technologies More Research on underwater heat technology EGS(Enhanced Geothermal System) Using in Zero-energy building, modeling TREC battery (Thermally Regenerative Electrochemical cycle) Transforms heat directly to Electrical energy Can be applied to geothermal, wastewater heat energy harvesting technology

Reference 지열발전 현황 및 기술동향 , 한국지질자원연구원 지열발전 기술현황, 한국에너지기술연구원 한반도 지열에너지자원 부존현황, 한국지질자원연구원 지열 냉난방 및 지열발전의 국내외 현황 전력과 미래의 에너지, 뉴턴 하이라이트 국내 에너지제로하우스 비교를 위한 요소기술 특성 및 표준모델 제시에 관한 연구, 이종국 Mirian. kisti. re. kr 몽골의 심부 지열에너지 자원과 지열발전에 관한 연구 백두산 화산가스 및 온천수에 대한 지화학적 연구 원더풀 사이언스 + others

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