• 제목/요약/키워드: Building comfort

Search Result 332, Processing Time 0.024 seconds

A Study on the Evaluation Method for the Degree of Integration towards Office Towers in Different Climate Zones

  • Han, Seung-Hoon;Moon, Jin Woo;Kim, Kyoung-Hee
    • Architectural research
    • /
    • v.14 no.4
    • /
    • pp.117-124
    • /
    • 2012
  • High rise office buildings represent one of the most energy-intensive architectural typologies. The growth of urban population necessitates sustainable high rise towers that lessen environmental impacts and energy consumption. Among various sustainable strategies, the integrated design is long known to be an important process that has great impact on building's sustainability. The framework for this paper is based on the case study of integrated towers that are located in different climate zones. The paper specifically addresses to what extent climate conditions influence the design of a high rise building and what kinds of the climate integrated design has been implemented. Qualitative case studies were carried out using published data and architectural drawing set. The technical work presented in the paper is based on computer simulation that examines the insolation analysis using hourly recorded weather data. The analysis results revealed that the site and building envelope integration and the site and building service systems have shown the most frequently employed in the integrated towers through the implementation of renewable resource integration, high performance envelopes and sustainable building service systems. Internal comfort and further energy saving in the integrated towers are offered through an automatic building management system. Due to the dynamic climate conditions, integration of building systems requires a sophisticated approach to building sustainability.

Optimization of Wind Louver Angle By CFD Simulation

  • Piao, Gensong;Shon, Donghwa;Kim, Youngwoo;Lee, Jungwon;Choi, Jaepil
    • Architectural research
    • /
    • v.18 no.4
    • /
    • pp.137-144
    • /
    • 2016
  • The objective of this study was to determine the optimal angle of a wind louver that would induce the optimal wind speed for indoor. Being controlled to have an optimized angle depending on the direction from which wind is blowing and the wind speed, the wind louver to be installed on the building envelop comes to create indoor comfort through a constant wind speed using the function that reduces the indoor wind speed by changing the angle when the wind speed is not lower than a certain level and makes wind flow into the room to the maximum when the wind direction is adverse to catching the wind or the wind speed is not higher than a certain level. To determine the optimal wind louver angle, a core-centered office building with cross-ventilation problems in the climate of Seoul, Korea, which experiences four distinct seasons, was considered for analysis in this study. A module 1 office space model was used for the CFD simulation to analyze the average indoor wind speed with respect to the outdoor wind speed (varied between 1 and 8 m/s), the wind louver angle, and the outdoor wind direction (varied between $0^{\circ}$ and $180^{\circ}$ in steps of $10^{\circ}$).

A Study on the Heating Characteristics of Radiant Floor Panel Using Heat Pipes with the Double Wick (이중 윅 타입 히트파이프를 이용한 바닥복사패널의 난방특성 연구)

  • Kim, Yong-Ki;Lee, Tae-Won
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.24 no.2
    • /
    • pp.183-189
    • /
    • 2012
  • Most of the domestic residential buildings have used the traditional radiant heating system, circulating hot water through the cross-linked polyethylene(PE-X) pipe buried in the floor panel of the heating space. New type of the heating panel was recently developed using heat pipes with double wicks. Some experiments were carried out in this study to verify the thermal characteristics of this heating system at the unit heating space which surrounded by outer space whose temperature of air be maintained scheduled value with time. Through the various experiments with several parameters, such as flow rate, inlet and outlet temperatures of hot water and the heating duration and so on, we found that the floor heating system with heat pipes was able to reduce the pumping power for hot water circulation by 4~31% compared with the conventional panel heating system using PE-X pipe. These results could be used for optimal design and efficient operation of the heating system as well as improvement of thermal comfort.

A Seasonal Indoor Thermal Conditions of a Newly-launched Training Ship

  • Hwang, Kwang-Il;Shin, Dong-Keol;Lee, Jin-Uk;Lee, Sang-Il
    • Journal of Navigation and Port Research
    • /
    • v.33 no.4
    • /
    • pp.289-294
    • /
    • 2009
  • The living performances of crews and passengers in cabins have been less received attention, while Korea is a top leading country in ship building industry. To develop a high value added ships like 5-star cruisers, researches on the comfort and productivity in cabins should be carried out with urgent. The purpose of this study is to measure and analyze of the ship's indoor thermal conditions in spring, summer and winter, and also to compare the seasonal differences, of which conditions are supplied from and controlled by marine HVAC The temperature, humidity and air supply volume of 5 different needs of cabins on a training ship were measured through a year, which was launched at Dec. 2005 and totally 246 crews can go on board for education. The following results were obtained: (1)In the spring, the temperature in cabins was measured as $20{\sim}25^{\circ}C$ and humidity was below 30%. (2)In the summer, the temperatures was controlled at $21{\sim}27^{\circ}C$ in almost cabins and humidity was between $40{\sim}60%$ which is known as comfort conditions. (3)In the winter, temperature and humidity was maintained between $19{\sim}26^{\circ}C$, and humidity was between $10{\sim}50%$. (4)It is clear that the humidity conditions in cabins are not properly controlled at all through a year to satisfy the Comfort Standards provided by ASHRAE and/or ISO, In conclusion, humidification and dehumidification of cabins must be treated with importance for more comfort living and working environments for crews and passengers.

Research on the Thermal Comfort Heating Mode Considering Psychological and Physiological Response of Automobile Drivers (운전자의 심리·생리 반응을 고려한 승용차 쾌적 난방 모드에 관한 연구)

  • Kim, Min Soo;Kum, Jong Soo;Park, Jong Il;Kim, Dong Gyu
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.30 no.3
    • /
    • pp.149-157
    • /
    • 2018
  • In this research, the psychological and physiological reactions of the driver were measured during winter to evaluate thermal comfort. The experiment was conducted using 3 different cases which are hot air heating, warm-wire seat heating and hot air & warm-wire seat heater operating simultaneously. With regard to psychological reaction, the warm-wire heating mode was the most preferred. The reason is that it is dry in other cases. With regard to EEG response, thermal comfort increased by 37% in warm air mode heating. In addition, when the warm-wire heating mode and the hot air & warm-wire heating mode were simultaneously operated, the thermal comfort continuously increased by between 17% and 20% for 20 minutes after boarding. Under the change of the autonomic nervous system, the thermal stress level increased by 23% after 15 minutes on board in the hot air heating mode and decreased continuously by 13% during the warm-wire seat heating mode. We recommended the hot air heating mode is only used for a short time to raise the inside temperature during the early boarding period and that warm-wire seat heating mode be actively utilized.

Selection to the Optimal Windows Transmittance of Office Building on Sky Conditions (천공상태에 따른 오피스 창호의 적정 투과율 선정)

  • 임오연;김병수
    • Korean Institute of Interior Design Journal
    • /
    • no.38
    • /
    • pp.225-232
    • /
    • 2003
  • The purpose of this study is to select the optimal and minimum transmittance for visual amenity in office buildings. This study progressed as follows. The first, we select 5 films with various transmittance based on the current film makers whose films being used on the windows of office building nowadays and the case study of construction. And then we choose 6 kinds of transmittance as evaluation object including plain glass. The second, we made a mock-up models having different transmittance on the southern windows with model of real scale office building. The third, we select 17 pairs of adjectives for the evaluation of visual comfort on interior or exterior conditions with transmittance factor. The fourth, subjective evaluation experiment was done using selected evaluation adjectives and the result was analyzed. The results are as follows : the minimum transmittance appropriate for the office building is 30%∼40% and the optimal transmittance range is 40%∼60%.

A Study on Indoor Environment Quality in Office Building (오피스 빌딩 실내환경의 질에 관한 연구)

  • Lee, Kyeong-Hee;Ha, Mi-Kyoung
    • Proceedings of the Korean Institute of Interior Design Conference
    • /
    • 2006.05a
    • /
    • pp.259-263
    • /
    • 2006
  • The purpose of this study is to assess the characteristics of self-reported symptoms of workers in office building with HVAC system, and also to provide better workplaces in terms of comfort and health. The methods employed in this study include literature review, field observations, and survey. The self-reported symptoms of workers such as headache, fatigue, itching and dryness regarded as SBS symptoms commonly occur after around 3:00 pm and are relieved after leaving their office buildings. according to results in previous studies, above are possibly related to CO2 concentrations. It is also found work environment factors and the satisfaction on indoor environment are all associated with worker's health. Hopefully, this overview of current work environments concerning the level of satisfaction and health problems of workers would help create healthier indoor environment.

  • PDF

The Performance Field-Application of Natural Ventilation System (자연환기시스템의 현장 적용성 평가-열환경,에너지부분)

  • Choi, Dong-Hyuk;Choi, Gyoung-Seok;Kang, Jae-Sik;Lee, Seung-Eon
    • Proceedings of the SAREK Conference
    • /
    • 2009.06a
    • /
    • pp.689-694
    • /
    • 2009
  • On account of Indoor Air Quality(IAQ) deterioration by reason of high isulation and air tightness for energy saving, absence of energy efficiency ventilation system development that can be domestic existing window system, the cost increase and the energy addition loss by mechanical ventilation for IAQ improvement the ventilation obligation making design standard was prepared by a social and technical background and the necessity. In this study, open module type natural ventilation window system for energy saving included a fixed and continuous quantity ventilation was developed. The purpose that indoor thermal comfort environment evaluate of indoor resident.

  • PDF

Real Time Near Optimal Control Application Strategy for Heat Source and HVAC System (열원 및 공조설비 통합 최적제어기법 구현에 관한 연구)

  • Song, Jae-Yeob;Ahn, Byung-Cheon;Joo, Yong-Duk;Kim, Jin
    • Proceedings of the SAREK Conference
    • /
    • 2008.06a
    • /
    • pp.60-65
    • /
    • 2008
  • The near-optimal control algorithm for central cooling and heating system has been developed for minimizing energy consumption while maintaining the comfort of indoor thermal environment in terms of the environmental variables such as time varying indoor load and outdoor temperatures. The optimal set-points of control parameters with near-optimal control are supply air and chilled or hot water temperatures. The near optimal control algorithm has been implemented by using LabVIEW program in order to analyze energy performance for central cooling and heating control system.

  • PDF

Real Time Near Optimal Control Application Strategy of Central Cooling System (중앙냉방시스템의 실시간 준최적제어 적용에 따른 실험적 연구)

  • Ahn, Byung-Cheon;Song, Jae-Yeob;Joo, Yong-Duk;Kim, Jin
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
    • /
    • v.20 no.7
    • /
    • pp.470-477
    • /
    • 2008
  • The near-optimal control algorithm for central cooling system has been developed for minimizing energy consumption while maintaining the comfort of indoor thermal environment in terms of the environmental variables such as time varying indoor cooling load and outdoor temperatures. The optimal set-points of control parameters with near-optimal control are supply air and chilled water temperatures. The near optimal control algorithm has been implemented by using LabVIEW program in order to analyze energy performance for central cooling control system.