• Title/Summary/Keyword: 환기공동

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An Evaluation on IR Sensor Based Demand Controlled Ventilation Strategies for Multi-zone in the Apartment House (IR(Infrared) 센서기반 제어방법에 따른 공동주택 멀티 존 환기시스템 평가 연구)

  • Hong, Sung-Min;Yoon, Dong-Won
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.24 no.2
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    • pp.174-182
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    • 2012
  • In previous research, most occupant said that they have not operated ventilation system installed in the house, because of increasing of energy consumption and unconcern of ventilation. Therefore, it is necessary to applied the sensor based demand controlled ventilation for the IAQ(Indoor Air Quality) and improvement of energy efficiency in ventilation strategy. The propose of this study is to present a application method of IR(Infrared) sensor for multi-zone DCV(Demand Controlled Ventilation) in the apartment house. It is possible that IR sensor could be used for DCV, because that could detect the occupant and action. IR sensor based DCV strategies are established to evaluate characteristic of application in the apartment house and simulated by Contam program. As a result, they have some week points though, if they would be applied DCV with optimum strategy, it would be useful to improve IAQ, to reduce energy consumption.

Energy Saving Potentials of Dedicated Outdoor Air System in a High-rise Apartment Building (외기전담 시스템 기반 초고층 공동주택 중앙 환기시스템의 에너지 절감효과 분석)

  • Kim, Min-Hwi;Kim, Jin-Hyo;Kwon, Oh-Hyun;Jeong, Jae-Weon
    • 한국태양에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.291-296
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    • 2009
  • This paper investigates the energy saving potentials of a dedicated outdoor air system (DOAS) applied to a highrise apartment building. As for a typical $132-m^2$ apartment unit, two different HVAC systems; centralized DOAS-Ceiling Radiant Cooling Panel and decentralized Energy Recovery Ventilator-Packaged Air Conditioner were installed. Transient behavior and control characteristics of each system were modeled numerically using a commercial equation solver program, and annual cooling coil load and heating load reduction potentials were compared. The research shows that DOAS-Ceiling Radiant Cooling Panel system can reduce the cooling coil load over 21% annually compared with the current Energy Recovery Ventilator-Packaged Air Conditioner pair. In addition, over 40% of annual ventilation heating load can be reduced by use of DOAS.

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Acceptable Supply Air Conditions of Dedicated Outdoor Air System for a High-rise Apartment Building (초고층 공동주택 외기전담 시스템 기반 중앙 공급식 환기시스템의 적정 급기조건 설정)

  • Kim, Min-Hwi;Kim, Jin-Hyo;Kwon, Oh-Hyun;Jeong, Jae-Weon
    • 한국태양에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.285-290
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    • 2009
  • The main thrust of this paper is to investigate acceptable supply air conditions of a dedicated outdoor air system (DOAS) for highrise apartment buildings. As for a typical $132-m^2$ apartment unit, it was assumed that centralized DOAS-Ceiling Radiant Cooling Panel was installed. Transient behavior and control characteristics of each system were modeled numerically using a commercial equation solver program. The optimized dew point temperature of the DOAS was discussed on the basis of the ASHRAE standard 62.1-2007 and the current Korean ventilation standard for apartments. It was found that the optimized dew point temperature of the DOAS supply air accommodating total latent load of a space is $11-12^{\circ}C$ and the appropriate supply air temperature of the DOAS is $11-12^{\circ}C$ in cooling period and neutral temperature of $18-20^{\circ}C$ in intermediate period.

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A Study on Ventilation Performance driven by Wind Force in Underground Parking Lots of Apartment - Influence of Opening Size and Surrounding Building - (공동주택 지하주차장의 풍력환기 성능에 관한 연구 - 환기구 면적 및 주변건물의 영향 -)

  • Roh, Ji Woong
    • KIEAE Journal
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    • v.12 no.1
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    • pp.29-34
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    • 2012
  • As a series of studies about natural ventilation driven by wind in basement parking lots of apartment, the influence of opening size and surrounding buildings on ventilation rate was analyzed. Natural ventilation in underground parking lots almost rely on wind than temperature difference. To investigate natural ventilation driven by wind, wind tunnel tests by using scale model and tracer gas method were conducted. $CO_2$-gas concentration was measured, natural ventilation rates were calculated. The experimental results showed that the natural ventilation rate is more reliable to wind direction and surrounding building than opening size and distance between buildings. It was verified that surrounding buildings play a principal role in increasing air flow rate by accelerating wind speed, and growing turbulence intensity. And it showed that ventilation performance is able to be increased by oblique wind to entrance ramp than head on wind in underground parking lots with surrounding buildings.

A Study on the Improvement of Ventilation Effectiveness in High-rise Apartment Buildings (초고층 공동주택의 환기효율 개선에 관한 연구)

  • Park, Jin-Chul
    • Journal of the Korean Solar Energy Society
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    • v.26 no.2
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    • pp.87-94
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    • 2006
  • The efficiency of ventilation system is one of the most important issues of designing ventilation in high-rise apartment buildings. The purpose of this study is to analyze the ventilation efficiency of ventilation system by experimental study using CO2 gas method. The results of this paper can be summarized as follows; (1) An appropriate ventilation including opening planning, mechanical and hybrid system are required. (2) The supply diffuser of ventilation system should be located near the contaminant source. (3) The return grill should be located along with supply diffuser for proper ventilation. and the return grill should be located near or right above the contaminant source. (4) However, the supply location right above the contaminant source has to be avoided. and the supply diffuser should be installed in module with return grill increase ventilation effectiveness.

Performance Evaluation of Multidrop Chamber Ventilation System in Apartment (공동주택내 다분기챔버형 환기시스템 적용을 통한 풍량분배 개선효과에 관한 연구)

  • Kim, Sung-Soo;Son, Jang-Yeul
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.21 no.10
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    • pp.545-552
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    • 2009
  • It is common to design the duct branches where to supply the required air flow for individual room in residential apartment house. And TAB process is applied to control the designed air volume with adjusting volume dampers and/or supply diffusers after fully installing the ventilation system. This process has been resulted increasing the initial cost for the residential ventilation system because of man-hour and accessories such as volume control damper or diffuser. However it is difficult to adjust the air volume adequately in small air duct branches in residential ventilation system. The purpose of this study is to figure out the performance of Multidrop chamber coupling system for the residential ventilation system.

Visualization of ventilated supercavitation phenomena around a moving underwater body (수중 운동체 주변에 형성되는 환기 초공동(ventilated supercavitation) 현상 가시화)

  • Chung, Jaeho;Cho, Yeunwoo
    • Journal of the Korean Society of Visualization
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    • v.13 no.1
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    • pp.26-29
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    • 2015
  • A laboratory experiment was carried out to observe and visualize ventilated supercavitation phenomena around a moving underwater body which is attached to a newly designed high-speed (Max. 20 m/s) carriage system in a wave tank. Compared to the existing many other experimental studies using cavitation tunnels, where the body is at rest and the fluid is in motion in a bounded or closed environment, the present experimental study deals with super-cavity formation in unbounded or free-surface bounded environments, where the body is in motion and the fluid is at rest. Main attention is paid to the effective visualization of the steady-state cavity formations around a moving body and, those cavity formations are reported pictorially according to the body speed, ventilated air-pressure, and with or without a cavitator.

A study on the Performance of Hybrid ventilation system in High-rise Apartment Houses (초고층 공동주택의 하이브리드 환기시스템의 성능평가에 관한 연구)

  • Kim, Ok;Park, Chang-Bong;Park, Jin-Chul;Kim, Nam-Gyu;Rhee, Eon-Ku
    • Proceedings of the SAREK Conference
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    • 2007.11a
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    • pp.113-118
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    • 2007
  • As the economic living standards are higher, the demands for more comfortable living space are also larger. In the response of this requirements, studies for improving indoor air environment have been conducted. In case of newly-built apartment buildings, the standard for the minimum ventilation to improve their indoor air quality was made. This study analysed the experimental results from the mock-up test of the hybrid ventilation system which is composed of natural and mechanical ventilation.

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