• Title/Summary/Keyword: Cooling heating energy consumption

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Study on the Thermal Characteristics of Concrete Using Insulation Performance Improve Material (단열성능향상 재료를 사용한 콘크리트의 열적 특성에 관한 연구)

  • Park, Young-Shin;Kim, Jung-Ho;Kang, Yeun-Woo;Youm, Kwang-Soo;Jeon, Hyun-Kyu
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2013.05a
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    • pp.227-228
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    • 2013
  • Recently, it is certain that the increase of heating and cooling energy consumption by radical change in climate condition has caused serious problems related to environmental and energy concerns associated with increase of fossil fuel usage and carbon dioxide production as well as global warming. So, various actions to reduce greenhouse gas exhaustion and energy consumption have been prepared by world developed countries. The energy consumption by buildings approximately reaches 25% of total korea energy consumption. The greatest part in the buildings of the energy consumption is building facade. but a few research projects on concrete comprising more than 70% of outsider of buildings has been tried. This research structural insulation concrete what improved insulation performance using insulation performance improve material.

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Study on the Thermal Conduction of Concrete using Insulation Performance Improvement Materials (단열성능향상 재료를 사용한 콘크리트의 열전도 특성에 관한 연구)

  • Kim, Jung-Ho;Park, Young-Shin;Kim, Sang-Heon;Jeon, Hyun-Kyu
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2014.05a
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    • pp.280-281
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    • 2014
  • Recently, it is certain that the increase of heating and cooling energy consumption by radical change in climate condition has caused serious problems related to environmental and energy concerns associated with increase of fossil fuel usage and carbon dioxide production as well as global warming. Therefore, various actions to reduce greenhouse gas and energy consumption have been prepared by world developed countries. The energy consumption by buildings approximately reaches 25% of total korea energy consumption. The greatest part in the buildings of the energy consumption is building facade. But a few research projects on concrete comprising more than 70% of outsider of buildings has been tried. This research is structural insulation concrete what improved insulation performance using micro form admixture and calcined diatomite powder and lightweight aggregate.

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Study of Comparison on Energy Consumption Based on HVAC area along Floor in High Rise Building (고층빌딩의 층별 에너지 사용량 비교에 관한 연구)

  • Park, Woo-Pyeng;Choi, Byong-Jeong;Kim, Jin-Ho
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.14 no.4
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    • pp.1-6
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    • 2018
  • In this study, the energy consumption of the typical floor was compared by the total energy comsumption of the building in highrise building. In gerneral, many researchers are studying on the typical floor in highrise buildings for avoiding complexity in energy simulation. But few papers are studied on energy consumption along the floors. In the model bulding, the energy consumption data were acquired by BEMS system in 2011. According the data, the total net energy consumption was $193.99kWh/m^2$ for all area and the total net energy consumption was $247.61kWh/m^2$ for HVACR area. The total electricity and gas energy are used 47.7% for heating and cooling, 33.5% for lighting and plug, 12.9% for conveyance power and 5.9% for restaurant. In comparison of only ground floor, amount of energy consumption in the lobby is 10%, and 90% of total energy consumption is used in the typical floor. For this result, energy simulation on the typical floor is acceptable for calculating the total energy consumption in the highrise building.

Cooling and Heating Load Analysis According to Building Type of Apartment House (공동주택의 주동 유형별 냉난방부하 분석)

  • Yoon, Sung-Meen;Lee, Kyung-Hee;Ahn, Young-Chull;Kim, Yong-Tae
    • Journal of Power System Engineering
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    • v.18 no.1
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    • pp.45-50
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    • 2014
  • This study focuses on the analysis of the cooling and heating load in accordance with apartment houses arrangement type using Ecotect Analysis. Korea have to reduce energy consumption part of building except in industry and transport because the rate of dependence on imports amounts to 94%, Apartment houses built in various forms in order to reduce energy are modelled in each window area ratio, shape, orientation, and climate through simulation. Through this study, we can analyze the cooling and heating load by form, window area ratio, orientation, and climate change and know the optimal elements by the form. In particular, although there have been done research on the window area ratio and the arrangement form, the research of the regional climate characteristics and the direction are hardly carried out. To supplement those problem, adding to seven direction and climatic element of southern region is characteristic(L Type, Y Type, - Type) of this study. The form of apartment houses built 10 years ago is modelled for simulation.

A Study on the Cooling Block Design for a Large Touch Screen Panel (TSP) Cover Glass Molding System (대형 Touch Screen Panel(TSP) 덮개유리 성형기의 냉각 블록 설계에 관한 연구)

  • Lee, Jun Kyoung
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.19 no.6
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    • pp.36-42
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    • 2020
  • Nowadays, the touch screen panel (TSP) cover glass for mobile smart devices is being developed with a curved glass shape due to different design requirements. Because the sizes of mobile smart devices continue to increase, there has also been a great increase in the demand for large-area curved glass greater than 20 inches. In this study, heat and fluid flow analysis using CFD was performed to optimize the heating surface temperature distribution of the large curved glass formation system. Five cooling water flow paths in the cooling block were designed and analyzed for each case. A function that can quantitatively calculate the temperature uniformity of the heating surface was proposed and these values were obtained for the five models. The temperature distributions of the heating surface and the energy consumption of the heating system were also compared and comprehensively analyzed. Based on the analysis results of the five different cooling channel path models, the optimal path design could be presented.

A Study on the Change in Energy Performance of the Domestic Building by the Isolation-heat Paint (차열도료 적용을 통한 국내 건축물의 에너지 성능 변화에 관한 연구)

  • Choi, Doo-Sung;Chun, Hung-Chan;Cho, Kyun-Hyong
    • Journal of the Korean Solar Energy Society
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    • v.31 no.5
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    • pp.33-40
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    • 2011
  • In this study, it is quantitatively analyzed for thermal Characteristics of isolation-heat paint which has been supplied to a domestic market through experiments and simulations. In the case of experiment using the container box, it shows 8% decrease on cooling energy consumption in a summer season, but shows increase on heating energy consumption. As a result, the analysis has found increase of energy consumption. As a result of holding simulations with meteorological data of domestic major cities, it shows an increase of energy consumption in domestic condition, and it is hard to expect an energy saving from the isolation-heat paint unless greater air-conditioning load.

The Change of Heating and Cooling Load according to the Thermal Insulation Performance of Window for an Apartment House (창호의 단열성능에 따른 공동주택 냉난방 부하량 변화)

  • Song, Su-Bin;Kim, Young-Tag;Yoon, Seong-Hwan
    • Proceedings of the SAREK Conference
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    • 2008.06a
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    • pp.853-856
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    • 2008
  • Windows have an great effect on annual building load because windows are the weakest parts of building envelope thermally. To reduce the consumption of building energy, the thermal performance of window has to be improved in first place. Therefore this research aims to make a quantitative analysis of the heating and cooling load according to the window thermal performance using the heat load simulation program. As a result of the simulation, annual heat load is down 38% according to the decrease of U-value of window, 1.00 W/$m^2K$. and annual heat load is up 10% according to the decrease of shading coefficient, 0.20. The annual load of the window with Low-E glass is 15% lower than the window with pair glass.

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Impact of future climate change on UK building performance

  • Amoako-Attah, Joseph;B-Jahromi, Ali
    • Advances in environmental research
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    • v.2 no.3
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    • pp.203-227
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    • 2013
  • Global demand for dwelling energy and implications of changing climatic conditions on buildings confront the built environment to build sustainable dwellings. This study investigates the variability of future climatic conditions on newly built detached dwellings in the UK. Series of energy modelling and simulations are performed on ten detached houses to evaluate and predict the impact of varying future climatic patterns on five building performance indicators. The study identifies and quantifies a consistent declining trend of building performance which is in consonance with current scientific knowledge of annual temperature change prediction in relations to long term climatic variation. The average percentage decrease for the annual energy consumption was predicted to be 2.80, 6.60 and 10.56 for 2020s, 2050s and 2080s time lines respectively. A similar declining trend in the case of annual natural gas consumption was 4.24, 9.98 and 16.1, and that for building emission rate and heating demand were 2.27, 5.49 and 8.72 and 7.82, 18.43 and 29.46 respectively. The study further analyse future heating and cooling demands of the three warmest months of the year and ascertain future variance in relative humidity and indoor temperature which might necessitate the use of room cooling systems to provide thermal comfort.

Analysis of Building Energy by the Typical Meteorological Data (표준기상데이터(부산지역) 적용에 따른 건축물에너지 분석)

  • Park, So-Hee;Yoo, Ho-Chun
    • 한국태양에너지학회:학술대회논문집
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    • 2008.11a
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    • pp.202-207
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    • 2008
  • Measures for coping with energy shortage are being sought all over the world. Following such a phenomenon, effort to use less energy in the design of buildings and equipment are being conducted. In particular, a program to evaluate the performance of a building comes into the spotlight. However. indispensable standard wether data to estimate the exact energy consumption of a building is currently unprepared. Thus, after appling standard weather data for four weather factors which were used in previous researches to Visual DOE 4.0, we compared it with the result of the existing data and evaluated them. For the monthly cooling and heating load of our target building, we used revised data for June, July, August, and September during which cooling load is applied. When not the existing data but the revised data was used, the research shows that an average of 14.9% increased in June, August, and September except for July. Also, in a case of heating load, the result by the revised data shows a reduction of an average of 11.9% from October to April during which heating load is applied. In particular, the heating loads of all months for which the revised data was used were more low than those of the existing data. In the maximum cooling and heating load according to load factors, the loads by residents and illumination for which the revised data was used were the same as those of the existing data, but the maximum cooling loads used by the two data have a difference in structures such as walls and roofs. Through the above results, the research cannot clearly grasp which weather data influences the cooling and heating load of a building. However, in the maximum loads by the change of weather data in four factors (dry-bulb temperature, web-bulb temperature, cloud amount, and wind speed) among 14 weather factors, the research shows that 5.95% in cooling load and 27.56% in heating load increased, and these results cannot be ignored. In order to make weather data for Performing energy performance evaluation for future buildings, the flow of weather data for the Present and past should be obviously grasped.

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Evaluating the Feasibility of a Ground Source Heat pump System for an Elderly Care Center through Simulation Approach (시뮬레이션을 통한 노인 요양 시설의 지열 히트펌프 시스템 적용 가능성 평가)

  • Byonghu Sohn;Young-Sun Kim;Seung-Eon Lee
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.19 no.4
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    • pp.39-52
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    • 2023
  • This study analyzes the energy performance of a elderly care center building and the applicability of a ground source heat pump (GSHP) system through simulation approach. For this purpose, a building information modeling (BIM) program and an energy performance calculation program were used. The impact of the mechanical ventilation system on the energy requirements of the heating and cooling system and the indoor environment was also analyzed, focusing on the change in indoor carbon dioxide (CO2) concentration, which is a representative indicator of the indoor environment (air quality). The simulation results showed that the target building exceeds Level 7 in terms of simulated primary energy consumption or actual energy consumption. In addition, it was analyzed that the target building could not maintain the indoor CO2 concentration below the standard concentration by natural ventilation through window opening alone. Combining the GSHP system with the mechanical ventilation system (Case B and Case C) can further reduce the overall energy consumption by reducing the amount of outdoor air introduced by opening windows. The cost savings compared to the baseline case are estimated to be 67.3% for Case A, 63.7% for Case B, 65.5% for Case C, and 42.5% for Case D. It is necessary to analyze the impact of various renewable energy technologies and passive ones on the energy performance and indoor environment of elderly care centers.