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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Solar Energy Society
Journal Basic Information
Journal DOI :
The Korean Solar Energy Society
Editor in Chief :
Volume & Issues
Volume 33, Issue 6 - Dec 2013
Volume 33, Issue 5 - Oct 2013
Volume 33, Issue 4 - Aug 2013
Volume 33, Issue 3 - Jun 2013
Volume 33, Issue 2 - Apr 2013
Volume 33, Issue 1 - Feb 2013
Selecting the target year
Simulation Analysis on Performance Comparison between R744 and R22 Solar Hybrid Heat Pump
Kang, Byun ; Cho, Honghyun ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 1~10
DOI : 10.7836/kses.2013.33.2.001
Simulation study of a solar hybrid heat pump using R744 and R22 for residential applications was carried out according to heat pump operating temperature, outdoor temperature and solar radiation. As a result, when the heat pump operating temperature increases from
, the COP of a R744 and R22 heat pump system decrease from 2.15 to 1.7 and from 3.09 to 2.69, respectively. Besides, as the outdoor temperature rises from
, the COP of R744 and R22 heat pump system increase from 1.73 to 2.12 and from 2.73 to 3.02. When the solar radiation increases from 10 to 20
, the collector operating time and collector efficiency of R744 heat pump increase 10.3 times and 50.7%, respectively. The performance of R744 solar hybird heat pump is more sensitive to operation condition compared to that of R22. Besides, the solar heating system is more effective to the R744 heat pump system.
Properties of Silicon Nitride Deposited by RF-PECVD for C-Si solar cell
Park, Je-Jun ; Kim, Jin-Kuk ; Song, Hee-Eun ; Kang, Min-Gu ; Kang, Gi-Hwan ; Lee, Hi-Deok ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 11~17
DOI : 10.7836/kses.2013.33.2.011
) deposited by radio frequency plasma enhanced chemical vapor deposition(RF-PECVD) is commonly used for anti-reflection coating and passivation in crystalline silicon solar cell fabrication. In this paper, characteristics of the deposited silicon nitride was studied with change of working pressure, deposition temperature, gas ratio of
, and RF power during deposition. The deposition rate, refractive index and effective lifetime were analyzed. The (100) p-type silicon wafers with one-side polished,
, and resistivity
were used. As a result, when the working pressure increased, the deposition rate of SiNx was increased while the effective life time for the
-deposited wafer was decreased. The result regarding deposition temperature, gas ratio and RF power changes would be explained in detail below. In this paper, the optimized condition in silicon nitride deposition for silicon solar cell was obtained as 1.0 Torr for the working pressure,
for deposition temperature, 500 W for RF power and 0.88 for
gas ratio. The silicon nitride layer deposited in this condition showed the effective life time of >
and the surface recombination rate of 25 cm/s. The crystalline silicon solar cell fabricated with this SiNx coating showed 18.1% conversion efficiency.
Wind energy assessment at complex terrain using mixture probability distribution
Song, Ho-Sung ; Kwon, Soon-Duck ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 18~27
DOI : 10.7836/kses.2013.33.2.018
This paper presents a method for assessing the wind energy potential at complex terrain using probability distribution. And the proper probability models of the parameters estimating the wind energy are presented. Finally a mixture-Weibull determined by numerical methods procedure are proposed to assess the probability distribution of the energy potential at a site. The developed method is applied to the Kwanjungchun Bridge and compared with wind records which the neighboring weather station.
An Analysis on Building Energy Reduction Effect of Exterior Venetian Blind According to Orientation and Reflectance of Slat
Kim, Jin-Ah ; Yoon, Seong-Hwan ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 28~34
DOI : 10.7836/kses.2013.33.2.028
It is essential to reduce building energy consumption in office building because government enact policy which encourages building energy certification from 2013. Office building has high cooling energy demand due to large glazed area of facade in these days. Shading devices can be an alternative of reducing high cooling energy demand. So, this study simulated a variety of exterior venetian blinds to know how much building energy be affected by orientation and reflectance of slat. The results of this study are based on Seoul weather data. The following is a summary of this study. 1) As a slat of venetian blinds has the lower reflectance, the more building energy reduced. Reflectance is usually affected by color and material of slat. In case reflectance is 0.2 reduce 4% of building energy than reflectance is 0.8. 2) Horizontal exterior venetian blinds are more effective than vertical exterior venetian blinds in all of orientation. Horizontal shape is average 16% more effective in shading effect than vertical shape. 3) In this case study, the most effective shading device is low reflectance horizontal exterior venetian blinds that result about 18% building energy reduction than no shade model. The results of this research can be used to plan shading devices for energy conservative office building.
A Study on the Efficiency Improvement of Glazing Panel with DSC Modules
Jang, Han-Bin ; Kang, Jun-Gu ; Lee, Sang-Gil ; Kim, Jun-Tae ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 35~41
DOI : 10.7836/kses.2013.33.2.035
Dye-sensitized solar cell (DSC) allows light transmission and the application of various colors that make it especially suitable for building-integrated PV (BIPV) application. In order to apply DSC module into windows, it has to be panelized: DSC module should be protected with reinforced glass to the entire surface. Up to date, it seems to be common to make double glazing with DSC modules with air gaps between the glasses and the DSC modules. Few research has been conducted on the characteristics of various glazing types with DSC modules. This study aims to analyze the electrical performance of DSC modules according to panelizing method for glazing unit with DSC modules. The prototype of the DSC glazing that applied silicone filler between DSC modules and glasses was developed. The electrical performances of this type of DSC glazing with the filler and rather conventional double glazing with DSC modules were compared. Their performances were measured using a solar simulator that is suitable for DSC performance testing. The results indicated that the electrical performance of the filler type DSC glazing improved by 7% compared to that of the conventional DSC double glazing type.
A study on method for improving renewable energy supply ratio for the school building applied PV system
Kim, Seok-Hyun ; Lee, Yong-Ho ; Hwang, Jung-Ha ; Cho, Young-Hum ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 42~49
DOI : 10.7836/kses.2013.33.2.042
Recently, the attention to renewable energy has increased globally because of the environmental issue and the global energy crisis. Accordingly, south korea is focused on increasing the renewable energy usage. And the government enforced a law to the public buildings to install the renewable energy facilities. In this study, the building to evaluate renewable energy consumption and supply ratio was selected. This building has 9.79% of renewable energy supply ratio by PV system. In this study, the method for improving renewable energy supply ratio was analyzed using additional PV system. And The 5 methods to increasing electricity were evaluated. The method of increase 4.24 times PV arrays area is most efficient way to increase the renewable supply ratio. The case 1, show that the increasing renewable energy supply ratio of 39.2% compared to exsiting PV system. The result of the above, consider the additional supply of renewable energy.
Application and Life Cycle Cost Analysis for Ice-rink using Seawater Heat Source Cooling System
Park, Jin-Young ; Kim, Sam-Uel ; Lee, Ho-Saeng ; Kim, Hyeon-Ju ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 50~55
DOI : 10.7836/kses.2013.33.2.050
On a plan for the Winter Olympics 2018, Korean government is in the process of the world`s first use of ocean energy for the Olympic ice-rink. This technology will be applied to a seaside town and have possibility of an export industry. In this study, we researched facilities and system for P ice-rink that acts as a cultural center as well as a physical plant in Busan and provided the way that apply by seawater heat source. Also, existing system and seawater heat source system of P ice-rink was analyzed by the most commonly used life cycle cost analysis among economics methods. Such economics data for ice-rink using seawater will be utilized by a basic information.
Development of Tracking Daylighting System Using Multi-Parabolic Reflector
Lee, Chung-Sik ; Kim, Jong-Min ; Park, Yeon-Min ; Sung, Tae-Kyung ; Joung, Che-Bong ; Kang, Seung-Hoon ; Kim, Byung-Chul ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 56~63
DOI : 10.7836/kses.2013.33.2.056
Daylighting system is an alternative lighting system using daylight collecting device, light transformer and light diffuser. In this paper, we developed a daylighting system in which the collecting device composed by dual parabolic reflectors, the silica optical fiber adapted to the light transformer and light diffuser made of the polyglass square sheet. We have estimated the system efficiency and general color rendering index(Ra) of the developed system. The system efficiency measured to 23.8% and Ra was revealed as 95. Ra number of the developed system is bigger than the number(65) of the previous fresnel lens based sunlight collector.
Impact of climate change scenarios in the Building Sector
Lee, Kwan-Ho ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 64~69
DOI : 10.7836/kses.2013.33.2.064
According to the Fourth Assessment Report of Intergovernmental Panel on Climate Change(IPCC) Working Group III, climate change is already in progress around the world, and it is necessary to execute mitigation in order to minimize adverse impacts. This paper suggests future climate change needs, employing IPCC Special Report on Emissions Scenarios(SRES) to predict temperature rises over the next 100 years. This information can be used to develop sustainable architecture applications for energy efficient buildings and renewable energy. Such climate changes could also affected the present supplies of renewable energy sources. This paper discusses one recent Fourth Assessment Report of IPCC (Mitigation of Climate Change) and the Hadley Centre climate simulation of relevant data series for South Korea. Result of this research may improve consistency and reliability of simulation weather data or climate change in order to take advantage of SRES and PRECIS QUMP. It is expected that these calculated test reference years will be useful to the designers of solar energy systems, as well as those who need daily solar radiation data for South Korea. Also, those results may contribute zero carbon and design of sustainable architecture establishing future typical weather data that should be gone ahead to energy efficient building design using renewable energy systems.
Evaluation of Heating and Cooling Thermal Output Characteristics of Prefabricated Steel Wall Panel System for Radiant Heating and Cooling
Lim, Jae-Han ; Koo, Bo-Kyoung ; Kim, Sung-Im ; Song, Seung-Yeong ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 70~77
DOI : 10.7836/kses.2013.33.2.070
Recently the radiant panel heating and cooling system has been regarded as an alternative of low temperature heating and high temperature cooling by applying the renewable energy sources to the heating and cooling of buildings. Especially this system can be used as HVAC system alternatives in super high-rise buildings for energy saving and thermal comfort. Also it can be possible to reduce the plenum space because the minimum ventilation air will be supplied into the space. This study focused on the evaluation the basic characteristics of thermal output in prefabricated steel wall panel system for radiant heating and cooling. In order to evaluate the thermal output according to both various supply water temperatures and supply water flow rates, three-dimensional dynamic heat transfer analysis was performed. As results, for the heating mode, thermal output increased by 26% with the supply temperature increasing by
. The surface temperature of panels range within
. For the cooling mode, thermal output decreased by 18.2% with the supply temperature increasing by
. The surface temperature of panels range within
and it was shown the even temperature distribution.
Design and Performance Prediction of Small Hydropower Plant Using Treated Effluent in Wastewater Treatment Plant
Lee, Chul-Hyung ; Park, Wan-Soon ; Kim, Won-Kyoung ; Kim, Jeong-Yeon ; Chae, Kyu-Jung ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 78~83
DOI : 10.7836/kses.2013.33.2.078
A methodology to predict the output performance of small hydro power plant using treated effluent in waste water treatment plant has been studied. Existing waste water treatment plant located in Kyunggi-Do were selected and the output performance characteristics for these plants were analyzed. .Based on the models developed in this study, the hydrologic performance characteristics for SHP sites have been analyzed. The results show that the flow duration characteristics of small hydropower plant for waste water treatment plant have quite differences compared with small hydropower plant for the river. As a result, it was found that the developed model in this study can be used to analyze the output characteristics for small hydro power in waste water treatment plant. Additionally, primary design specifications such as design flowrate, capacity, operational rate and annual electricity production were estimated and discussed. It was found that the models developed in this study can be used to decide the design performance of small hydropower plant for waste water treatment plant effectively.
Automated Blind Control Strategy to Minimize Occupant`s Distractions
Koo, So-Young ; Yeo, Myoung-Souk ; Seong, Yoon-Bok ; Kim, Kwang-Woo ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 84~92
DOI : 10.7836/kses.2013.33.2.084
Blinds are a common type of shading device and are increasingly operated automatically to overcome the limitations of manual operation. Automated blinds need to be controlled to maximize benefits of daylight in the point of occupant comfort and energy consumption. However, the previous control methods could cause occupant`s distractions by the undesirable control time interval and amount of blind movement. A few researches suggested the control concept for minimizing occupant`s distractions by automatic blind control, but they did not provide optimal control algorithm to be useful in practice. In this paper, we propose an optimal control algorithm for automated blinds that can maximize not only visual comfort but also sunlight penetration into buildings based on occupants` preferences on blind movement and sunlight. The proposed control algorithm can prevent solar glare on workplane and minimize occupant`s distractions to maximize occupants` visual comfort.
Two-step thermochemical cycles for hydrogen production using NiFe
Kim, Chul-Sook ; Cho, Ji-Hyun ; Kim, Dong-Yeon ; Seo, Tae-Beom ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 93~100
DOI : 10.7836/kses.2013.33.2.093
Two-step thermochemical cycle using ferrite-oxide(
) device was investigated. The
(g) was converted into
in the first experiment which was performed using a dish type solar thermal system. However the experiment was lasted only for 2 cycles because the metal oxide device was sintered and broken down. Another problem was that the reaction was taken place mainly on a side of the metal oxide device. The m-
, which was widely known as a material preventing sintering, was applied on the metal oxide device. The ferrite loading rate and the thickness of the metal oxide device were increased from 10.67wt% to 20wt% and from 10mm to 15mm, respectively. The chemical reactor having two inlets was designed in order to supply the reactants uniformly to the metal oxide device. The second-experiment was lasted for 5 cycles, which was for 6 hours. The total amount of the
production was 861.30ml. And cerium oxide(
) device was used for increasing
device had low thermal resistance, however, more
production rate than
A Study on Development of Test Site for Wind Turbine Prototype Test
Moon, Chae-Joo ; Chang, Young-Hag ; So, Soon-Yeol ; Kim, Tae-Gon ; Kim, Young-Gon ; Jeong, Moon-Seon ; Jeong, Seong-Won ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 101~107
DOI : 10.7836/kses.2013.33.2.101
It is evident that in the wind energy business as an economic activity there is a close relationship between the wind speed and the revenues. The wind turbine test facility for wind turbine accreditation is intended to be used by the industry for testing of both main components and systems. This paper suggest the wind test site for certification of prototype wind turbine with international regulations. The test site has an environmental permit for wind turbines with a maximum hub height of 120m and a rotor diameter up to 120m, and can accommodate prototypes with installed electrical powers up to 5MW each. A wind turbine manufacturer can lease the location for a period of type certification. And also researchers are the development of new methods for measuring the influence, performance and durability of the components, a mathematical and numerical modelling of component responses by using the site.
A study on the UI design and program development for integrated management of carbon data in city
Park, Jun-Hyoung ; Kim, Seong-Sik ; Kim, Jong-Woo ; Choi, Guei-Tai ;
Journal of the Korean Solar Energy Society, volume 33, issue 2, 2013, Pages 108~117
DOI : 10.7836/kses.2013.33.2.108
Studies on the regulation and measurement of greenhouse gases(GHGs) emissions have been carrying out for global wanning. In order to reduce greenhouse gas emissions, many countries have been promoting the Emissions Trading System and projects of the Joint Implementation(JI) and Clean Development Mechanism(CDM). These country`s GHG emissions have been measured calculation criteria based on the Intergovernmental Panel on Climate Change(IPCC) Guidelines. In order to respond to GHGs regulation, in each country, it is planing to build a Low-Carbon City. The system has been developed for calculating GHGs emissions from companies and institutions in their respective countries. However, the system can monitor the GHGs per city, has not been developed. In this paper, it is studied to design the User Interface and to develop integrated monitoring program for Low-carbon city. This program will make possible monitoring and management, statistics, and reports written by using each data in units of cities.