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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean society for New and Renewable Energy
Journal Basic Information
Journal DOI :
The Korean Society for New and Renewable Energy
Editor in Chief :
Volume & Issues
Volume 4, Issue 4 - Dec 2008
Volume 4, Issue 3 - Sep 2008
Volume 4, Issue 2 - Jun 2008
Volume 4, Issue 1 - Mar 2008
Selecting the target year
Analysis of Effects on Topography for P-V System
Kim, Young-Deug ; Ahn, In-Soo ; Kim, Min-Su ; Chang, Jeong-Ho ; Chang, Moon-Soung ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 3~9
In design PV (photovoltaic) system, there are many important factors to consider for best site selection. It is essential to understand to know the amount of sunlight available and how to minimize the shadings. This study presents basic concepts for understanding sun's position and insolation. also it gives easy tools for topography analysis. Finally, this study shows some theoretical calculations of power generation losses by topographic obstacle's elevations and disadvantages in economic feasibility, that is about 7million won loss per year for case of 10 degree topography elevation with assuming average Korea's topography elevation as 5 degree.
A Study on the Design Methods of PV System for Apartment Building Application
Yi, So-Mi ; Lee, Yong-Ho ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 10~16
Nowaday, The Sustainable Development about global environment is the most important subject. In urban environment, a variety of the nature energy utilization such as the solar energy are the most efficient solution to solve this issue. One of these efficient solutions, a photovoltaic system using sunlight has been introduced to the building with an advantage such as cost-effective, safe for using and good for environment friendly in light with energy utilization. Recently, many of the apartment housings are built in domestic country. The apartment buildings have been constructed since early of 1970's. now apartment is taking over 50% out of entire housing in korea. The apartment housing applying to a photovoltaic system has been extensively studied in the foreign country but our county runs short. So, It was necessary to technical development of PV application which is suitable in Korean house culture. The objective of this study is to develop the building integrated PV application method for apartment building.
Fabrication and Evaluation of Low Concentrator Photovoltaic Modules with Aluminium Reflectors
Jeong, Hye-Jeong ; Lee, Young-Woo ; Ju, Seong-Min ; Lee, Ho-Jae ; Boo, Seong-Jae ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 17~22
A low concentrating (< 5X) photovoltaic module with aluminum reflectors is fabricated and evaluated which is designed to reduce the affection of the high temperature to the solar cell modules preventing the efficiency lowering. As results, the output power is increased of 1.97X from the concentrating photovoltaic module which is designed with the concentrating ratio of 2.25X and to control the module temperature cooling the module by air circulation. Also, the effect of the concentrating module with aluminum reflectors on the conventional PV module is investigated at the field. The result shows the increase of the output power more than about 20% and the improvement of the module efficiency of 1.4X in spite of the increase of average module temperature.
Application of Neural Network for Long-Term Correction of Wind Data
Vaas, Franz ; Kim, Hyun-Goo ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 23~29
Wind farm development project contains high business risks because that a wind farm, which is to be operating for 20 years, has to be designed and assessed only relying on a year or little more in-situ wind data. Accordingly, long-term correction of short-term measurement data is one of most important process in wind resource assessment for project feasibility investigation. This paper shows comparison of general Measure-Correlate-Prediction models and neural network, and presents new method using neural network for increasing prediction accuracy by accommodating multiple reference data. The proposed method would be interim step to complete long-term correction methodology for Korea, complicated Monsoon country where seasonal and diurnal variation of local meteorology is very wide.
Computational Flow Analysis on Applicability of Vehicle-Induced Wind to Highway to Wind Power Generation
Kim, Hyun-Goo ; Woo, Sang-Woo ; Jang, Moon-Seok ; Shin, Hyung-Ki ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 30~36
The possibility of whether the induced wind from a vehicle traveling on highway can be used in wind power generation has been verified through computational flow analysis. The bus which is presumed to accompany relatively strong and wide range of induced wind compared to passenger vehicles because of its wide frontal area has been set as the subject of research. In order to ensure the reliability of research, the flow analysis surrounding the bus on a flat road where median strip is not installed has been compared with a preceding research while the validity of grid system and interpretation method used in this research have been assured by a qualitative method. In case of the median strip type wind power generator system, because it has been verified that a strong streamwise wind speed (5 m/s) is derived from the contraction effect of flow passage between the bus and the median strip while maintaining a relatively consistent upwind wind speed (1.4 m/s) in vertical direction in the wake area after the bus passes by although the change of wind speed is intense, it was decided as having some possibility of wind power generation. In case of the traffic sign panel type wind power generator system installed at the upper top of highway, because the wind speed of 2 m/s level has been derived for a limited time only at a section equal to the length of the bus and a faint induced wind speed less than 0.5 m/s was shown at other regions, it was decided as having almost no possibility of wind power generation.
A Study on Combustion Characteristics of Pulverized Fuel Made from Food Waste
Son, Hyun-Suk ; Park, Yung-Sung ; Kim, Sang-Guk ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 37~43
Three properties of food waste are water 80%, ash 3%, volatile matter 17%. When food waste goes through treatment process such as removal of foreign substances, removal of water as well as sodium, dryness, and pulverization, it transforms into 4,000 Kcal/kg purverized fuel if moisture content is below 13%. Fuel ratio (fixed carbon/volatile matter) of purverized fuel is low compared with bituminuous coal. Ignition temperature measured by thermogravimetry analyzer is about
. Combustion test of purverized fuel have been performed using energy recovery facility which include storage tank of dewatered cake, dryer, hammer mill, combuster including burner, boiler, flue gas treatment equipment. When 160-180 kg/hr of fuel is steadily supplied to burner for 3 hours, combustor temperature reaches about
and CO is 77-103 ppm at 1.55 excess air ratio and SOx and Cl are under 2 ppm and 1ppm, respectively. This experiment demonstrate that purverized fuel made from food waste could be an alternative clean energy at the age of high oil price.
Willingness-to-pay for the Use of Renewable Energy by Experts
Lim, So-Young ; Heo, Eun-Nyeong ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 44~49
This study uses contingent valuation method (CVM) to elicit willingness to pay monthly for electricity or heating produced by renewable energy (RE). The experts who participated in the conference of the Korean Society for New and Renewable Energy in May of 2008 were asked to answer the questionnaires: how much would you be willing to pay monthly to receive electricity (or heating) generated by RE? We find some evidence that the respondents have higher willingness to pay for RE electricity than RE heating even if the average electric bills were lower than the heating bills. The respondent who belongs to a large family and has a good opinion of RE tends to show high willingness to pay for both RE electricity and RE heating.
Algae Based Energy Materials
Han, Seong-Ok ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 50~55
Recently, sea algae cultivation as carbon sink and carbon dioxide fixation have been considered. Also, various researches on bioenergy derived from sea algae and the utilization of fibers, saccharide, and lipid of sea algae have been performing. Till now, algae fibers has been used for manufacturing of paper and reinforcing of polymer composites and the extracts of sea algae are used for cosmetics, pharmaceutical materials and food such as agar. Especially, algae fiber has so similar properties to cellulose in terms of crystallinity and functional groups that it can be utilized as reinforcements of biocomposites. Biocomposites as alternatives of glass fiber reinforced polymer composites are environmentally friendly polymer composites reinforced with natural fibers and are actively applying to the automobiles and construction industries. In this paper, characteristics of algae fiber and biocomposites reinforced with algae fiber as environmentally friendly energy materials have been introduced.
Biochemical Methane Potential and Biodegradability of Animal Manure and Cultivated Forage Crops at the Reclaimed Tideland
Heo, Nam-Hyo ; Lee, Seung-Heon ; Kim, Byeong-Ki ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 56~64
Anaerobic biodegradability (AB), which can be determined with the ultimate methane yield by the decomposition of organic materials, is one of the important parameters for the design and the operation of anaerobic digestion plant. In this study, Biochemical methane potential (BMP) test has been carried out to evaluate the methane yields of animal manures such as pig and cattle slurries, and different forage crops cultivated at the reclaimed tideland such as maize, sorghum, barley, rye, Italian ryegrass (IRG), rape, rush, and waste sludge produced from slaughterhouse wastewater treatment plant (SSWTP). In the ultimate methane yield and biodegradability of animal manure, those of pig slurry were 345
and 44.7% higher than 247
and 46.4% of cattle slurry (Cat. 2). The ultimate methane yield and biodegradability of spike-crop rye (Rye 1) were 442.36
and 86.5% the highest among different forage crops, those of the other forage crops ranged from 306.6 to 379
of methane yield with the AB having the range of about 60 to 77%. Therefore the forage crops could be used as a good substrate to increase the methane production and to improve the biodegradability in anaerobic co-digestion together with animal manure.
SOC Sustaining Strategy for HEV through State-machine Control
Byun, Sang-Min ; Kim, Beom-Soo ; Cha, Suk-Won ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 65~71
Considering the world's environmental problem, HEVs are projected as one of the solution. The keys of the HEV cruise control are expanding the use of electric motor and operating the internal combustion engine in the efficient region. This paper presents a new structure of SOC sustaining model where state-machine control is used. The proposed model defines battery charging and discharging as states and SOC of the battery as control variables. In this paper, we introduce various methods in deterministic rule-based control for HEV and describe a new SOC sustaining controller used by state-machine.
Computational Heat Transfer Analysis of Dish Type Solar Receiver Using the Transient model
Oh, Sang-June ; Lee, Ju-Han ; Seo, Joo-Hyun ; Lee, Jin-Gyu ; Cho, Hyun-Seok ; Seo, Tae-Beom ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 72~79
A numerical and experimental studies are carried out to investigate the transient heat transfer characteristics of 5kWth dish type solar air receiver. Measured solar radiation and temperatures at several different locations are used as boundary conditions for numerical a. Many parameters' effects (reflectivity of the reflector, the thermal conductivity of the receiver body, transmissivity of the quartz window, etc.) on the thermal performance are investigated. Discrete Transfer Method is used to calculate the radiation heat exchange in the receiver. A transient heat transfer model is developed and the rate of radiation, convection and conduction heat transfer are calculated. Comparing of the experimental and the numerical results, results of both are in good agreement. Using the numerical model, the transient heat transfer characteristics of volumetric air receiver for dish type solar thermal systems are known and the transient thermal performance of the receiver can be estimated.
Development of Ni-based Catalyst for Hydrogen Production with Steam Reforming of Light Hydrocarbon
Kim, Dae-Hyun ; Lee, Sang-Deuk ; Lee, Byung-Gwon ; Kim, Myung-Jun ; Hong, Suk-In ; Moon, Dong-Ju ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 4, 2008, Pages 80~87
Steam reforming of LPG was investigated over spc-Ni/MgAl catalyst in a temperature range of
, feed molar ratio of
, space velocity of
and at atmospheric pressure. spc-Ni/MgAl catalyst was prepared by a co-precipitation method, whereas Ni/MgO and
catalysts were prepared by an incipient wetness method. The characteristics of catalysts were analyzed by N2 Physisorption, CO chemisorption, XRD, TOF-SIMS, SEM and TEM techniques. The Ni/MgO and
catalysts were deactivated by the formation of carbon. However, the spc-Ni/MgAl catalyst showed higher conversion and
selectivity than the other catalysts, even though carbon was formed on the surface of the catalyst during the reaction under the tested reaction conditions.