• Journal of the Korean Solar Energy Society
• /
• v.26 no.3
• /
• pp.89-97
• /
• 2006

Our Housing culture continuously changes for the correspondence to social development and changes of economy, and be developing. A massive apartment complex continuously increased, and According to this in our country heating energy consumption of a residential building is continuously increasing at country me whom was limited in order to raise efficient residential land use and diffusion ratio of house. If confirm an element to be able to reduce use of a heating energy, and there is saving possibility to parts of energy saving, this study will present the standard amount used with bases to the gas amount used for heating and Field Test data about room temperature. Execute simulation with building balance (public area, a plain), the gas amount useds such as incense of a building, indoor setting temperature ($^{\circ}C$), a position of an apartment house etc. to affect the energy amount used of a valuation object building of a variable through Field Test and research on the actual condition. Calculate the standard amount used of city gas for winter season heating of a comparative analysis apartment house to data value getting the above results through Field Test and simulations with bases.

• Journal of the Korean Solar Energy Society
• /
• v.30 no.5
• /
• pp.93-99
• /
• 2010

Nucleate pool boiling experiments with constant heat flux condition were performed using pure R113 for various channel heights under saturated pool condition. A circular heater of 1mm diameter, with artificial cavity in the center, fabricated using MEMS technique and the high-speed controller were used to maintain the constant heat flux. Images of bubble growth were taken at 5,000 frames per second using a high-speed CCD camera. The bubble geometry was obtained from the captured bubble images. The effects of channel height on the bubble growth behaviors were analyzed as dimensional scales for the initial and thermal growth regions. The parameters for the bubble growth behaviors were bubble radius, bubble growth rate, and bubble shapes. These phenomena require further analysis for various surface angles, but this study will provide good experimental data with constant heat flux boundary condition for such works.

• Journal of the Korean Solar Energy Society
• /
• v.29 no.3
• /
• pp.51-58
• /
• 2009

Recently, many social, economical and political problems have occurred in the field of urban energy supply because of the depletion of fossil fuels and the international climate change agreements and the current energy-related laws focus on individual buildings which makes them difficult to implement. Also, the policies for energy savings have increased day by day, but it is difficult to establish efficient urban plan because of lack of integrated policies and institutions. Current legal systems for urban plan does not cover domestic and international climate change agreements, energy related industry's structural changes and other environmental problems such as embodied energy and global warming. This paper tries to investigate current conditions of legal system to provide fundamental materials for improving energy conservation in urban plan.

• Solar Energy
• /
• v.10 no.2
• /
• pp.77-85
• /
• 1990

In the present analysis, a number of sun control devices are examined for their performance in promoting the interior visual environment. Two exemplary cases are introduced for their excellence in harnessing the concept of daylighting and passive concepts. Of these, the Johnson Controls branch office building in Salt Lake City manifests the effectiveness of light shelves and clerestory windows in implementing these concepts. Distinct optical characteristics are found for overhangs, light shelves, louvers, and blinds as they interfere with the path of sunlight. Substantial amount of energy could be saved if the fundamentals of these devices are truly understood in their application to residential and commercial buildings. Sustained efforts should be made in this regard by the builders, architects, energy consultants, and educators who make contributions in energy management.

• Journal of the Korean Solar Energy Society
• /
• v.33 no.6
• /
• pp.26-31
• /
• 2013

Use of heat from seawater could be different from the weather conditions of a coastal city and seawater temperatures near the city. It will be a good option to use surface layer water with Heat Pump system for using seawater cooling/heating in Jeju. The study investigates the proper depth for seawater heat gain of Jeju area in Korea. Sampling points are 0, 10, 20, 30m from the surface of the Sea. Seawater temperature does not change significantly according to the depth in winter, while the temperature is quite different according to the depth in summer. In this study, it is analyzed to compare existing system and seawater heat source system for target buildings on Jeju. And this systems are calculated a initial cost.

• Journal of the Korean Solar Energy Society
• /
• v.24 no.3
• /
• pp.65-71
• /
• 2004

This study analysed data on the weather of Seoul, Gwangju and Mokpo to examine the degree of temperature increase in those Korean cities. 1) When the results of the analysis were compared with those of previously analysed temperature increase in 1990s and 1940s, there was an increase in temperature of $1.7^{\circ}C$ in Seoul, $1.5^{\circ}C$ in Gwangju and $0.7^{\circ}C$ in Mokpo. 2) According to the seasonal analysis, $1.7^{\circ}C$ in Seoul, $1.5^{\circ}C$ in Gwangju and $0.7^{\circ}C$ in Mokpo increased in Spring. On a monthly basis in Spring increase in April was highest($2.3^{\circ}C$ and $1.0^{\circ}C$ in Gwangju and Mokpo, respectively). As for Seoul, $2.4^{\circ}C$ increased in March, highest. In July and August of Summer, no significant change occurred in the three cities, but in Autumn, $1.0^{\circ}C,\;1.5^{\circ}C$, and $0.3^{\circ}C$ in Seoul, Gwangju and Mokpo increased, respectively. In Winter, $2.9^{\circ}C$ in Seoul, $1.9^{\circ}C$ in Gwangju, and $2.3^{\circ}C$ in Mokpo increased, respectively.

• 한국태양에너지학회:학술대회논문집
• /
• 2012.03a
• /
• pp.502-505
• /
• 2012

This study suggested 'Environmental Friendly City Model' and 'Energy Planning Process' according to the increasing necessity of 'Energy Saving Green City and 3 technologies like (1)Urban Spatial Modeling, (2)Urban Energy Consumption, (3)Urban Energy Supply Planning technologies were suggested which are able to support sustainable urban energy planning'. The results are as follows. (1)E-GIS modeling system was suggested as a 'Planning Supporting System'. (2)Urban Energy Consumption Algorithm was systemized with planning information of E-GIS DB. (3)Urban Energy System Location was deduced by integrating E-GIS DB and ANN algorithm.

• Proceedings of the SAREK Conference
• /
• 2006.06a
• /
• pp.1232-1237
• /
• 2006

In Daegu, spread works of photovoltaic have were carrying out from a part of the solar city Daegu but, actual results have were insignificant. According to this study, it analyzed actual conditions of four building integrated photovoltaic system proper to the subject of investigation in Daegu City, in order to investigate the cause of inactive spread of building integrated photovoltaic system. After analyzing of actual state and performance, this study will present not only economic evaluation that Is problem of spread but also, environment evaluation by estimating to have an effect on greenhouse gas reduction.

• Journal of Korean Society for Atmospheric Environment
• /
• v.11 no.E
• /
• pp.23-29
• /
• 1995

Relationship between atmospheric aerosol transmissivity and air pollution was analyzed using observed data in a large industrial city, Pusan, Korea. The atmospheric aerosol transmissivity predicted by method of present study in Pusan was assessed by the method of Yamamoto et al.(1968) in order to set up an empirical model to predict the transmissivity using the various meteorological parameters and air pollution. As a result, good correlation between these tow method re observed. Thus, it is possible to conclude that the parameterization of air pollution suggested by this study is another method to give reliable estimate of atmospheric aerosol transmissivity and direct solar irradiance in Pusan.

• Journal of the Korean Solar Energy Society
• /
• v.28 no.6
• /
• pp.78-86
• /
• 2008

The aim of this paper is to show the daylight environment of a light pipe system according to sun movement. A light pipe system has been mounted on the roof of the windowless full scale model: the solar spot has diameter of 0.65m and is 1.3m long, giving an aspect ratio of 1:2. The full scale model was installed on the rooftop of the SHINAN apartment in Yongin city that has no obstructions against sunlight. The test room is equipped with sensors for the measurements of the internal illuminance and has an area of 6m(W)$\times$6m(D)$\times$4m(H). The system has been monitored with a data-logger to evaluate the cumulative distribution of illuminance on a floor-plane from 16th, April to 29th, May, 2008 over one month and selected clear sky condition. For the daylight performance of floor area, the totally 49 measuring points has been used to determine the internal illuminance and an HP datalogger(HP34970A) records the measurements for one consecutive month. The horizontal external illuminance has been measured with two outdoor sensors. This paper presents the results of monitoring light pipe system with internal/external illuminance ratio and cumulative frequency distribution of floor-plane illuminance are discussed The results show that lightpipe is proficient device for introducing daylight into the building. However It provided different daylight indoor environment with wide or narrow Interquatile range of illuminance, internal/external illuminance ratio and cumulative frequency distribution according to solar positions under suuny sky condition. For more achieving the improvement of lightpipes also include energy savings, user visual comfort with various indicators; seasonal solar height, room and lightpipes geometries.