Go to the main menu
Skip to content
Go to bottom
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 10, Issue 4 - Dec 2014
Volume 10, Issue 3 - Sep 2014
Volume 10, Issue 2 - Jun 2014
Volume 10, Issue 1 - Mar 2014
Selecting the target year
Analysis of Construction Cost and Influence Factors on Horizontal Ground Heat Exchangers
Yoon, Seok ; Lee, Seungrae ;
Journal of the Korean society for New and Renewable Energy, volume 10, issue 3, 2014, Pages 6~13
DOI : 10.7849/ksnre.2014.10.3.006
This paper presents a computational study of thermal performance and construction cost of horizontal ground heat exchangers (GHEs). GLD (ground loop design) simulations of various type of GHEs were carried out. Construction costs were also calculated based on standard estimating, and compared with vertical type GHE system. Besides that, dummy regression analysis was conducted to study the influence of design parameters on the simulation results in horizontal ground heat exchanger system.
Small Wind Turbine Installed at the University Building Rooftop for Green Energy Utillization
Lee, You Suck ; Kim, Jae Yong ;
Journal of the Korean society for New and Renewable Energy, volume 10, issue 3, 2014, Pages 14~21
DOI : 10.7849/ksnre.2014.10.3.014
As the world supply of fossil fuel sources decreases, the need for efficient energy consevation and develping green energy technologies becomes critical. Because of the high cost of the foundation for large turbines and optional high wind speed (over 12 m/s), it is very difficult to be located at inland city. For the solution above mentioned problem, we have been experimented about that not only using the adaption of wind power system on buildings for improving turbine efficiency, but also applying a wound rotor type induction generator for a small wind turbine.In this research, we try to find out the wind direction and wind speed those were measured every 1 min., during operation period, using the anemometers which consist of horizontally spinning cups on a vertical post. Performance testing for small wind turbine generating system was carried out by using the induction motor and invertor. Finally, we measured the power of 1 kW wind turbine system with the clamp meter and a voltmeter.
Power and Economic Simulation of Island for the Field Demonstration Test of Smart Microgrid System Based on Stand-alone Wind power
Kang, SangKyun ; Lee, EunKyu ; Lee, JangHo ;
Journal of the Korean society for New and Renewable Energy, volume 10, issue 3, 2014, Pages 22~30
DOI : 10.7849/ksnre.2014.10.3.022
The isolated self-generating electricity with diesel engine generator has been used in islands far away from main land. It costs high because of increasing oil price, and unsafe to have supplying oil and its related components by ship due to unexpectable marine conditions. Therefore there is the need for the hybrid system of renewable energy like wind or solar energy systems with oil engine generator, which can reduce oil use and extend oil supplying period. In this study, the feasibility of such hybrid system with smart micro grid on the eight islands of Jeon-nam province is surveyed to find good place for the demonstration test of the hybrid system. In each island, 3 wind turbine systems of 10 kW and photovoltaic of 20 kW are tested with already installed diesel engine. The performance and costs of the hybrid system in each island are compared in the given conditions of solar and wind energy potential. As a result of the study, Jung-ma island is recommended for the optimum place to make real field demonstration test of isolated hybrid generating and smart grid systems.
The Comparison Analysis between Psim Simulation and Motor-Generator (MG) Set Output Characteristics
Lim, Hyung-Tack ; Jo, Da-Som ; Son, Hyo-Soo ; Moon, Sang-Soo ; Lee, Seok-Hyun ; Kim, Kun-Su ; Jo, Chul-Hee ;
Journal of the Korean society for New and Renewable Energy, volume 10, issue 3, 2014, Pages 31~38
DOI : 10.7849/ksnre.2014.10.3.031
The importance of energy is growing according to the energy shortage and environmental concerns. Accordingly, in order to solve the problems about the use of fossil fuel, a renewable energy sources are needed. Global renewable energy power industry's position in the renewable energy market becomes important and new technology development is also essential. MG set composed by the induction motor and permanent magnet synchronous generator for simulating a renewable energy source is based on a suitable experiment equipment. The torque generated by applying a voltage to the induction motor in MG set is used as an input of the permanent magnet synchronous generator. In Psim simulation, the characteristics of the induction motor model was formulated and the output torque characteristics of the motor was controlled using the induction motor side inverter, In this paper, the comparison analysis between Psim simulation and the output characteristics of the MG set is performed in order to identify a renewable energy power system more accurately.
Comparative Study on Performance of Grid-Connected Photovoltaic Modules in Tropical Monsoon Climate under Thailand condition
Kim, Seung Duck ; Koh, Byung Euk ; Park, Jin Hee ; Cheon, Dae In ;
Journal of the Korean society for New and Renewable Energy, volume 10, issue 3, 2014, Pages 39~46
DOI : 10.7849/ksnre.2014.10.3.039
The performances of three different types of photovoltaic (PV) module technologies namely, copper-indium-diselenide (CIGS), mono-crystalline silicon (mo-Si) and amorphous silicon (a-Si) have been comparatively studied in the grid-connected system for more than a year under the tropical monsoon climate of Thailand. The yields, performance ratios and system efficiencies for the respective PV module technologies have been calculated and a comparison is presented here. The performance ratios of the initial operation year for CIGS showed highest among the compared technologies under Thailand climate conditions by marking 97.0% while 89.6% for a-Si and 81.5% for mo-Si. Although mo-Si has shown highest efficiencies all over the period, under the testing conditions, the operating efficiency of mo-Si was down-graded from its reference value mainly due to high operating temperature and the efficiency of the tested CIGS module was also found as high as that of mo-Si in the study. Accordingly, outdoor assessment shows that CIGS modules have demonstrated high performance in terms of yields and performance ratios in Thailand climate conditions.
A Study on the Economic Analysis of the Energy Storage System in Customer
Kim, Jeongho ; Jang, Junoh ;
Journal of the Korean society for New and Renewable Energy, volume 10, issue 3, 2014, Pages 47~54
DOI : 10.7849/ksnre.2014.10.3.047
Recently, BESS is considered as one of essential countermeasure for demand side management. However, an economic evaluation is critical issue for the introduction of power system because the cost of BESS is very high in present stage. Therefor, this paper presents economic evaluation method for customer use case by considering peak shaving function based on the real time price. From the case study on the model power system and educational customer, it is confirmed that the proposed method is a practical tool for the economic analysis of BESS. and analytical approach for the reliability assessment in radially operated distribution systems. The approach can estimate the expected reliability performance of distribution systems by a direct assessment of the configuration of the systems using the reliability indexes such as NDP (Non-Delivery Power) and NDE (Non-Delivery Energy). The indexes can only consider the number and configuration of the load, but can not consider the characteristics of the load which is the one of the most important factor in the investment cost for the distribution systems. Therefore, this paper presents the new performance indexes for the investment of the distribution facilities considering both the expected interruption cost for the load section and the operation characteristics of Energy Storage System. The results from a case study show that the proposed methods can be a practical tool for the reliability management in distribution systems including Energy Storage System.