• 한국신재생에너지학회:학술대회논문집
• /
• 한국신재생에너지학회 2007년도 춘계학술대회
• /
• pp.823-828
• /
• 2007

In compare with a major developed countries, Korea consumes much energy, but also eliminates much carbon dioxide. Agricultural sector eliminate much carbon dioxide than industrial sector. In Kyoto protocol, Korea needs to reduce carbon dioxide. One way to reduce carbon dioxide is utilization of biomass in rural area. This paper focus on utilization of biomass in rural area. If use 20% potential amount of biomass, it obtain 50% of TPES on agricultural sector. The condition of utilization biomass is connected with agricultural policy, environmental policy, and energy policy. And environmental restriction keep pace with economical incentive.

• 한국주거학회논문집
• /
• 제17권4호
• /
• pp.1-13
• /
• 2006

The purpose of the study was to identify the level of housing choice behavior by using the factors of residential satisfaction level, mobility motivation, and housing needs of potential purchasers in Bukgu New Housing Area, Ulsan. The survey used questionnaire from 326 households living in Bukgu and nearby area and analyzed using descriptive statistics. The research results showed low degree of residential satisfaction in storage space and neighborhood. The mobility motivations were improvement of physical environment improvement, education environment, walking road, view and lighting. The housing needs for indoor spaces showed to want more functional arrangement than the room size. The housing needs for outdoor spaces showed to want neighborhood environment in connection with the education or hospital facilities, the welfare facilities for pre-kindergarten children and elders and the leisure facilities. And the housing needs for facilities were floor furnishing for health, crime prevention system for safety needs, housekeeping appliance against environmental pollution, additional function for energy saving. The housing needs for common spaces showed that the residents preferred playing facilities by age group, exercise facilities, the community hall and the rest room which can do games or meetings.

• 한국의류산업학회지
• /
• 제19권2호
• /
• pp.221-229
• /
• 2017

This study researched the needs of smart fashion items using energy harvesting for outdoor wearers and surveyed the application areas and design preferences for energy-harvesting systems based on outdoor activities. A total of 217 subjects were surveyed. Subjects who had at least 3 years of experience in outdoor activities were selected in order to increase the reliability of the research results. The survey investigated lifestyles based on outdoor activities, outdoor clothing and electronic equipment usage, purchase style, utilization plan, and design preference for energy-harvesting clothing and supplies. The results showed that 62.7% of the respondents had experience in outdoor activities for more than five years. 96.3% of the subjects carried electronic equipment, and 179 participants(82.5%) experienced discomfort due to battery consumption/dead batteries during outdoor activities. 78.4% were interested in smat fashion items using energy-harvesting technology, and the energy-conversion technology that was useful for outdoor activities was "kinetic energy"(74.7%). Participants showed a high preference for a detachable type(30.9%) and a city type(69.1%) that can be worn in outdoor activities as well as in general life. The preferred location of the electric power-charging device was the "Hem area of top garment"(35.9%), and the reason for this selection was that it was easy to operate and did not interfere with movement. The data from this paper can be used as a basis for product planning and product design for energy-harvesting apparel designers and supply developers for outdoor clothing.

• 대한설비공학회:학술대회논문집
• /
• 대한설비공학회 2007년도 동계학술발표대회 논문집
• /
• pp.58-63
• /
• 2007

Lots of needs are being paid for how to design HVAC system in large-scale buildings. Increasing awareness of energy use is main point of this research. HVAC systems' energy characteristics are not clearly identified and understood, so the optimal design of HVAC system is very important. The energy parameters of HVAC design that are system input energy, water/air moving equipments (pumps/fans) energy and outdoor air conditioning energy for IAQ are important. The purpose of this study is to provide the basic data for energy conservational HVAC design strategies.

• Nuclear Engineering and Technology
• /
• 제49권2호
• /
• pp.434-441
• /
• 2017

Containment venting is one of several essential measures to protect the integrity of the final barrier of a nuclear reactor during severe accidents, by which the uncontrollable release of fission products can be avoided. The authors seek to develop an optimization approach to venting operations, from a simulation-based perspective, using an integrated severe accident code, THALES2/KICHE. The effectiveness of the containment-venting strategies needs to be verified via numerical simulations based on various settings of the venting conditions. The number of iterations, however, needs to be controlled to avoid cumbersome computational burden of integrated codes. Bayesian optimization is an efficient global optimization approach. By using a Gaussian process regression, a surrogate model of the "black-box" code is constructed. It can be updated simultaneously whenever new simulation results are acquired. With predictions via the surrogate model, upcoming locations of the most probable optimum can be revealed. The sampling procedure is adaptive. Compared with the case of pure random searches, the number of code queries is largely reduced for the optimum finding. One typical severe accident scenario of a boiling water reactor is chosen as an example. The research demonstrates the applicability of the Bayesian optimization approach to the design and establishment of containment-venting strategies during severe accidents.

• 산업경영시스템학회지
• /
• 제29권1호
• /
• pp.47-55
• /
• 2006

This study is to provide information in the development of energy conservation technologies by means of technological demand survey covering energy market and industrial field among energy-related technologies. For this purpose, we check both the present state of energy technologies and trends of social change in Korea, and then combine social needs with major, bottleneck, and essential technologies required for the future. The range of this study covers the field of industry, kiln, furnace, metal, building, transport, and electricity. For case study, valid 120 companies among the 500 companies selected randomly in the energy data-base of Korea institute of energy research (KIER) are considered.

• 기술혁신학회지
• /
• 제13권3호
• /
• pp.399-422
• /
• 2010

탄소배출에 대한 글로벌 규제 확대는 새로운 산업규제와 무역장벽을 가져오고 있으며, 세계 각국은 재생에너지 개발, 에너지 효율 증대, 환경 개선 등을 동시에 추구효과는 녹색투자를 통해 경기부양을 도모하고 있다. 한국 정부는 이러한 환경변화 속에 녹색투지를 통한 새로운 성장기회를 모색하고 있으며, 기업은 저탄소 친환경 구조로의 전환을 생존의 문제로 직면하게 되었다. 이는 산업구조의 변화와 전환을 가져올 뿐만 아니라, 인력 구성의 변화와 함께 요구숙련의 변화를 요구한다. 이러한 녹색경제로의 전환에서, 미래 숙련수요에 대응한 인력양성은 녹색경제의 전환에 대한 대응으로서 뿐만 아니라 녹색성장을 견인하는 추동력이 된다. 본 연구는 자동차산업을 중심으로 미래 숙련 수요에 따른 인력양성 방안을 모색한다. 그린카 관련한 미래 숙련 수요에 대해 현 대학 교과상의 문제점을 살펴보며 이에 대한 개선방안을 모색하기로 한다. 이를 통해 녹색성장에서 그린카 만이 아닌 타 부문에서의 미래 숙련 수요에 대응한 인력양성 방안도 마련할 수 있는 방법론의 개선을 도모한다.

• 융합정보논문지
• /
• 제8권1호
• /
• pp.1-7
• /
• 2018

스마트주택은 IT 기술에 대한 관심의 증가와 함께 가장 중요한 미래 주택의 대안으로 주목받고 있으며, 본 연구는 스마트주택 기술이 어떻게 거주자의 변화하는 니즈를 반영하고 있는지 기술개발 현황을 분석하고자 하였다. 연구방법으로는 첫째, 미래의 라이프스타일니즈를 파악하기 위한 내용분석을 실시하였고. 둘째, 전 세계의 대표적 미래 스마트 주택 사례를 선정하여 스마트 기술요소를 분석하였다. 그 결과, 자동화관련 기능이 가장 높은 35%의 비중을 차지하였고, 건강관련 기능이 19%, 그 뒤를 이어 여가 및 에너지 관련 기능이 15%였으며, 정보지원기능이 11%, 관계지원 기능은 6%에 머물렀다. 스마트 주택은 높은 기술비용을 고려할 때 거주자들의 실질적 니즈를 반영해야 하며, 본 연구는 스마트주택의 현황을 기술적 관점이 아닌 거주자의 니즈를 중심으로 분석하였다는 데 그 의의가 있다. 향후 거주자의 세분화된 니즈에 따라 특화된 의료주택, 에너지절감주택 등 다양한 형태의 스마트 주택개발 연구가 이어져야 것이다.

• 대한전기학회논문지:시스템및제어부문D
• /
• 제50권8호
• /
• pp.367-375
• /
• 2001

In Underwater Flight Vehicle depth control system, the followings must be required. First, it needs robust performance which can get over modeling error, parameter variation and disturbance. Second, it needs accurate performance which have small overshoot phenomenon and steady state error to avoid colliding with ground surface or obstacles. Third, it needs continuous control input to reduce the acoustic noise and propulsion energy consumption. Finally, it needs interpolation method which can sole the speed dependency problem of controller parameters. To solve these problems, we propose a depth control method using Fuzzy Sliding Mode Controller with feedforward control-plane bias term and Neural Network Interpolator. Simulation results show the proposed method has robust and accurate control performance by the continuous control input and has no speed dependency problem.

• 한국정밀공학회지
• /
• 제32권4호
• /
• pp.339-344
• /
• 2015

Machine tools are one of the energy-intensive equipment used in the manufacturing industry. The importance of energy has increased and the machine tools are required to be energy-efficient. The servo systems of the machine tool consume electrical power to rotate a spindle and to feed a tool during machining. Servo system consumes a lot of energy when the machine tool is operated. The energy consumption pattern of each axis needs to be investigated in order to optimize the machining process with regard to energy cost. In this paper, an energy monitoring system is developed considering various measuring points of servo system in order to grasp the energy consumption pattern of each axis.