• Title/Summary/Keyword: Heating systems

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A Study on the Horizontal Ground Source Beat Pump Greenhouse Heating System with Thermal Storage Tank (축열조를 채용한 수평형 지열원 히트펌프 온실 난방 시스템에 관한 연구)

  • Park, Yong-Jung;Kim, Kyoung-Hoon
    • Journal of Energy Engineering
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    • v.15 no.3 s.47
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    • pp.194-201
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    • 2006
  • Greenhouses should be heated during nights and cold days in order to fit growth conditions in greenhouses. Ground source heat pump (GSHP) systems are recognized to be outstanding heating and cooling systems. A horizontal GSHP system with thermal storage tank was installed in greenhouse and investigated the performance characteristics. The reasons for using thermal storage tank were discussed in detail. Thermal storage tank can provide heat for heating load that is larger than GSHP system heating capacity. The results of study showed that the heating coefficient of performance of the heat pump system was 2.69.

Development of a Direct-Vapor Heating Inhalator (증기직접가열방식의 비염치료기 개발)

  • Jeon, Chang-Wan;Kang, Taesam
    • Journal of Institute of Control, Robotics and Systems
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    • v.19 no.4
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    • pp.322-327
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    • 2013
  • Recently many people have been troubled with perennial allergic rhinitis. But there is no way to cure for root of it until now. Therefore many medical treatments to release symptoms of perennial allergic rhinitis have been researched. One of them is localized aerosol hyperthermia, which injects $42^{\circ}C{\sim}43^{\circ}C$ vapor into nasal cavity. Vapor inhalator for localized aerosol hyperthermia has been researched in foreign country. But on the other hand it has rarely been researched inside of the country. Since most clinics and hospitals have used imported vapor inhalator, it is needed to develop domestic vapor inhalator. In the paper, a superior vapor inhalator compared to former developed one is developed. The superiority of it comes from direct-vapor heating instead of water heating to control vapor temperature. The developed vapor inhalator has shorter rising time than the existing one because of direct-vapor heating. Furthermore vapor generation part and control part of the vapor inhalator developed as one piece mock-up. It enables the vapor inhalator to have smaller size. Many laboratory tests are performed and compared to existing results to prove its performance.

A Study on the Application Method of Flexible Pipe for District Heating in Korea (지역난방용 Flexible Pipe 활용방안 연구)

  • Lee, Ki-Seb;Park, Nam-Soo
    • Proceedings of the SAREK Conference
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    • 2008.06a
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    • pp.637-642
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    • 2008
  • The concept of district heating involves centralised heat production where heat is distributed to consumer via a piping network. The objective of this work is to identify the Flexible Pipe from an economy, execution, maintenance point of view. Flexible Pipe has in some countries, especially in Europe, been used for many years in district heating. In spite of years of experience, there still exist doubts about the possibilities of using flexible pipes in district heating applications, mostly because of no experiences in domestic market. The advantage of flexible pipe systems is their flexibility. This holds not only for the inner pipe but also for the total pipe system including insulation and jacket. Even for the largest diameter the minimum radius of curvature is given to 1.5m. The most important difference between flexible pipe systems and preinsulated steel pipes is their simple and quick assembly. Such information could provide a basis for making reasonable hypotheses about consumer preferences, to foam a basis for making future marketing more effective.

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The Study on the Zero-Energy House Prototype of Country House (농촌주택에 적합한 제로에너지 하우스의 프로토타입 연구)

  • Im, Kyung-Up;Kim, Bich-Na;Lee, Chul-Sung;Yoon, Jong-Ho;Jin, Kyeong-Il
    • 한국태양에너지학회:학술대회논문집
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    • 2009.11a
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    • pp.185-190
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    • 2009
  • Due to the building energy consumption of total energy consumption of Korea takes over 24%, economizing building energy and using renewable energy resources is being required. To suggest the prototype of zero energy house of country house, the passive systems and active systems are applicated and simulated. In case of wall insulation system is applicated, the heating load of building is reduced. Also, clear triple pair glazing system reduced 2.1% of heating load of building. The amount of reducing heating load by infiltration is depending on the Heating system. In this model, the 0.3ACH made 14.6% saving on heating load from base infiltration 0.82ACH. The solar thermal system of active system could save 80% of DHW and PV system supplies electric power more than average consumption of year. Through the optimum process, the end use of zero energy house of country house is 36kWh/m2.yr and total energy consumption is reduced about 74.2%.

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Application of the Outdoor Air Temperature Prediction Control for Intermittent Heating Residences (간헐난방주택에 대한 외기온도 예측제어 적용 연구)

  • 태춘섭;조성환;이충구
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.13 no.8
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    • pp.682-691
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    • 2001
  • Most of radiant floor heating systems are operated in the intermittent heating mode in Korea. The application possibility of predictive suboptimal control for Koran residential house was investigated by computer simulation and experiment. For this study, TRNSYS program was used and an experimental facility consisting of tow rooms ($3\times4.4\times2.8 m$) identical in construction was built. The facility enabled simultaneous comparison of two different control method. And real multi residential hose was investigated. Results showed that outdoor air temperature prediction control was superior to the conventional control for radiant floor heating system operated in the intermittent heating mode. New control system resulted in good thermal environment and les energy consumption.

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Numerical Analysis on Effect of the Environmental Velocity for Circular Heating Source with Heat Generation (열생성을 가진 원형발열체의 외부 유속의 영향에 대한 수치해석)

  • Bae, K.Y.;Ji, M.K.;Chung, H.S.;Chung, H.T.;Jeong, H.M.
    • Journal of Power System Engineering
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    • v.8 no.1
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    • pp.30-35
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    • 2004
  • This paper represents the numerical analysis on effect of the environmental velocity for circular heating source with heat generation. In general heating system, the oil and sheath heater is widely used, but these systems have many problems. So, the heating source with carbon ingredient has been researched in many country about manufacture, thermal and electrical properties. In this research, a circular heating source was studied through numerical analysis on several conditions of unsteady state, beat generation and environmental velocity. The temperature distributions at steady state is appeared as a non-linear pattern with variations of environmental velocity. So, the correlation equation between temperature at steady state and environmental velocity was obtained.

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Active Solar Heating System Design and Analysis for the Zero Energy Solar House (제로에너지 솔라하우스의 난방/급탕용 태양열 시스템 설계 및 분석)

  • Baek, N.C.;Yoo, C.K.;Yoon, E.S.;Yoo, J.Y.;Yoon, J.H.
    • Journal of the Korean Solar Energy Society
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    • v.22 no.4
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    • pp.1-9
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    • 2002
  • This study is on the design and evaluation of Zero Energy Solar House(ZeSH) including active solar heating system. Various innovative technologies such as super insulation, passive solar systems, super window, ventilation heat recovery system...etc were analyzed by individual and combination for the success of ZeSH. The ESP-r simulation program was used for this. Simulation results shows that almost 77% of heating load can be reduced with the following configuration of 200mm super insulation, super windows, passive solar system and 0.3 ventilation rate per hour. Active solar heating system (ASHS) was designed for the rest of the heating load including hot water heating load. The solar assisted heat pump is used for the auxiliary heating device in order to use air conditioner but not included in this study. The yearly solar fraction is 87% with a solar collector area of $28m^2$. The parametric studies as the influence of storage volume and collector area on the solar fraction was analyzed.

Economic Analysis of a Residential Ground-Source Heat Pump System (단독주택용 지열원 열펌프 시스템의 경제성 분석)

  • Sohn, Byong-Hu;Kang, Shin-Hyung;Lim, Hyo-Jae
    • New & Renewable Energy
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    • v.3 no.4
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    • pp.31-37
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    • 2007
  • Because of their low operating and maintaining costs, ground-source heat pump(GSHP) systems are an increasingly popular choice for providing heating, cooling and water heating to public and commercial buildings. Despite these advantages and the growing awareness, GSHP systems to residential sectors have not been adopted in Korea until recently. A feasibility study of a residential GSHP system was therefore conducted using the traditional life cycle cost(LCC) analysis within the current electricity price framework and potential scenarios of that framework. As a result, when the current residential electricity costs for running the GSHP system are applied, the GSHP system has weak competitiveness to conventional HV AC systems considered. However, when the operating costs are calculated in the modified price frameworks of electricity, the residential GSHP system has the lower LCC than the existing cooling and heating equipments. The calculation results also show that the residential GSHP system has lower annual prime energy consumption and total pollutant emissions than the alternative HVAC systems considered in this work.

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Assessing the Economic and $CO_2$ Emission Reductions Viability of Domestic Ground-Source Heat Pumps (단독주택용 지열 열펌프 시스템의 경제성과 이산화탄소 배출 저감 가능성 평가)

  • Sohn, Byong-Hu;Kang, Shin-Hyung
    • Proceedings of the SAREK Conference
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    • 2009.06a
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    • pp.64-69
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    • 2009
  • Because of their low operating and maintaining costs, ground-source heat pump(GSHP) systems are an increasingly popular choice for providing heating, cooling and water heating to public and commercial buildings. Despite these advantages and the growing awareness, GSHP systems to residential sectors have not been adopted in Korea until recently. A feasibility study of a residential GSHP system was therefore conducted using the traditional life cycle cost(LCC) analysis within the current electricity price framework and potential scenarios of that framework. As a result, when the current residential electricity costs for running the GSHP system are applied, the GSHP system has weak competitiveness to conventional HVAC systems considered. However, when the operating costs are calculated in the modified price frameworks of electricity, the residential GSHP system has the lower LCC than the existing cooling and heating equipments. The calculation results also show that the residential GSHP system has lower annual prime energy consumption and total greenhouse gas emissions than the alternative HVAC systems considered in this work.

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Economic Analysis of a Residential Ground-Source Heat Pump System (단독주택용 지열원 열펌프 시스템 경제성 분석)

  • Sohn, Byong-Hu;Kang, Shin-Hyung;Lim, Hyo-Jae
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.11a
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    • pp.515-518
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    • 2007
  • Because of their low operating and maintaining costs, ground-source heat pump(GSHP) systems are an increasingly popular choice for providing heating, cooling and water heating to public and commercial buildings. Despite these ad- vantages and the growing awareness, GSHP systems to residential sectors have not been adopted in Korea until recently. A feasibility study of a residential GSHP system was therefore conducted using the traditional life cycle cost(LCC) analysis within the current electricity price framework and potential scenarios of that framework. As a result, when the current residential electricity costs for running the GSHP system are applied, the GSHP system has weak competitiveness to conven- tional HVAC systems considered. However, when the operating costs are calculated in the modified price frameworks of electricity, the residential GSHP system has the lower LCC than the existing cooling and heating equipments. The calculation results also show that the residential GSHP system has lower annual prime energy consumption and total pollutant emissions than the alternative HVAC systems considered in this work.

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