Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Air-Conditioning and Refrigeration Engineering
Journal Basic Information
Journal DOI :
The Society of Air-Conditioning and Refrigerating Engineers of Korea
Editor in Chief :
Volume & Issues
Volume 21, Issue 12 - Dec 2009
Volume 21, Issue 11 - Nov 2009
Volume 21, Issue 10 - Oct 2009
Volume 21, Issue 9 - Sep 2009
Volume 21, Issue 8 - Aug 2009
Volume 21, Issue 7 - Jul 2009
Volume 21, Issue 6 - Jun 2009
Volume 21, Issue 5 - May 2009
Volume 21, Issue 4 - Apr 2009
Volume 21, Issue 3 - Mar 2009
Volume 21, Issue 2 - Feb 2009
Volume 21, Issue 1 - Jan 2009
Selecting the target year
A Study on the Evaluation and Characteristics of Architectural Facility-equipment Noise in Building
Byun, Woon-Seob ; Choi, Dool ; Kim, Jae-Soo ;
Korean Journal of Air-Conditioning and Refrigeration Engineering, volume 21, issue 10, 2009, Pages 537~544
On account of the technological development, intelligent building is on increasing where the artificial regulation on indoor environment is possible, thence the concern about those facilities such as water-supply facility, water-heater and drainage facility has becomes higher. However, due to diversification and complicated system of the facility-equipments, the noise generating from such facility equipment is gradually becoming a problem, and since especially equipment noises arising at the machine room frequently infringe into the resident's pleasant living environment with the complex types of an air-borne sound and a structure-borne sound, it is becoming the civil complaint. On such viewpoint, this Study ever observed the characteristics of noise generating from various facility-equipments in the building, and intended to evaluate the facility-noises by use of the valuation index such as PSIL, N, NC, NR. As result of, the facilities noise which happens in the machine room makes normal conversation very difficult due to high sound pressure level. Based on such data, this study is willing to present it as an essential material for establishment an efficient measure against the facility-noises arising at machine room hereafter.
Performance Evaluation of Multidrop Chamber Ventilation System in Apartment
Kim, Sung-Soo ; Son, Jang-Yeul ;
Korean Journal of Air-Conditioning and Refrigeration Engineering, volume 21, issue 10, 2009, Pages 545~552
It is common to design the duct branches where to supply the required air flow for individual room in residential apartment house. And TAB process is applied to control the designed air volume with adjusting volume dampers and/or supply diffusers after fully installing the ventilation system. This process has been resulted increasing the initial cost for the residential ventilation system because of man-hour and accessories such as volume control damper or diffuser. However it is difficult to adjust the air volume adequately in small air duct branches in residential ventilation system. The purpose of this study is to figure out the performance of Multidrop chamber coupling system for the residential ventilation system.
Comparison of Energy Demand Characteristics for Hotel, Hospital, and Office Buildings in Korea
Park, Hwa-Choon ; Chung, Mo ;
Korean Journal of Air-Conditioning and Refrigeration Engineering, volume 21, issue 10, 2009, Pages 553~558
Energy demand characteristics of hotel, hospital, and office building are compared to provide guidelines for combining building in community energy system design. The annual, monthly, and daily energy demand patterns for electricity, heating, hot water and cooling are qualitatively compared and important features are delineated based on the energy demand models. Key statistical values such as the mean, the maximum are also provided. Important features of the hourly demand patterns are summarized for weekdays and weekends. Substantial variations in both magnitudes and patterns are observed among the 3 building types and smart grouping or combination of building type and size is essential for a successive energy supply.
Study on Improvement of Lubrication Characteristics for the Material of Compressor Friction Parts with Nano-oil
Kim, Sung-Choon ; Kim, Kyong-Min ; Hwang, Yu-Jin ; Park, Young-Do ; Lee, Jae-Keun ;
Korean Journal of Air-Conditioning and Refrigeration Engineering, volume 21, issue 10, 2009, Pages 559~563
Performance of refrigerant oil at the thrust-bearing and at the journal-bearing of a scroll compressor is a significant factor. This paper presents the friction and anti-wear characteristics of nano oil with a mixture of a refrigerant oil and carbon nano particles. The characteristics of friction and anti-wear using nano-oil is evaluated using the disk on disk tester for measuring friction surface temperature and the coefficient of friction. The average friction coefficient of nano-oil was reduced by 60% compared to raw oil under 600 N and 1,000 rpm. It is believed that the interaction of nano particles between surfaces can be improved the lubrication in the friction surfaces. Worn surfaces of frictional specimen were also investigated by the optical and atomic force microscopy. Conclusively, it is expected that wear and friction coefficient of compressor can be reduced by alignment applying nano-oil as refrigerant oil.
A Study on the Application Plan of Air-Conditioning and New and Renewable Systems in the Large High Schools
Kim, Ji-Yeon ; Park, Hyo-Soon ; Kim, Seong-Sil ; Suh, Seung-Jik ;
Korean Journal of Air-Conditioning and Refrigeration Engineering, volume 21, issue 10, 2009, Pages 564~574
The study is conducted to study a new, optimum and new and renewable energy application method that can cover the minimum energy and operation costs within a range of school budgets. By deriving the optimum application method, it is expected to maximize the cooling/heating and hot water supply energy saving efficiencies for educational facilities. Therefore, this research implemented a study on the new and renewable energy utilization technique diffusion expansion method and the optimum method. As a result, the first optimum plan was introduced with the multi-type geothermal heat pump 475.6 kW+highly efficient electronic cooling/heating device(EHP) 545.2 kW. On the other hand, the second optimum plan was induced as the multi-type geothermal heat pump 261kW+solar heat collector
+highly efficient electronic cooling/heating device(EHP) 759.8 kW.
Theoretical Derivation of the Optimum Rotation Speed of a Desiccant Rotor
Lee, Dae-Young ; Song, Gwi-Eun ;
Korean Journal of Air-Conditioning and Refrigeration Engineering, volume 21, issue 10, 2009, Pages 575~582
The optimum rotation speed of a desiccant rotor is studied theoretically based on a theoretical solution to the heat and mass transfer processes in the desiccant rotor. A simple correlation equation for the optimum rotation speed is derived to show the effects of various parameters including the thermo-physical properties, the geometric dimension, and the operating condition of the desiccant rotor. The theoretical result is compared with existing experimental data to validate the linearization and simplification included in the solution procedure. Based on the theoretical solution, the effects of major parameters on the optimum rotation speed are studied and the fundamental mechanism of the influences is investigated.
Antibacterial Characteristics of Silver Nano-Particles Attached to Activated Carbon Filter
Heo, Ju-Yeong ; Nam, Sang-Yeob ; Kang, Jeong-Hee ; Song, Ji-Hyeon ; Kang, Byung-Ha ; Han, Sung ;
Korean Journal of Air-Conditioning and Refrigeration Engineering, volume 21, issue 10, 2009, Pages 583~589
Activated carbon has long been used in purification processes for indoor air quality. However, the bioaerosol removal by activated carbon is not often sufficient to be used in an air control devise. In order to overcome these problems, silver nano-particles have been proposed as an antibacterial agent on the surface of activated carbon. Silver or silver ions have been known for antimicrobial activities. In this study, bioaerosol generated by using an Escherichia coli culture was introduced to a lab-scale column packed with activated carbon (AC) and silver nano-particles attached to activated carbon (Ag-AC). E. coli was almost completely removed in the Ag-AC column, whereas bioaerosol penetrated through the AC column. To determine the antibacterial effect of different filter materials in a full-scale air-handling system, another experiment was conducted using a wind tunnel equipped with a heat exchanger and three filter materials including commercial fabric, AC and Ag-AC. It was found that E. coli proliferated on the surface of the heat exchanger after 5 days, which dramatically increased bioaerosol counts in the effluent air stream. The fabric filter could not control the increased bioaerosol and most of the E. coli penetrated the filter. The bacterial removal efficiency was found to be approximately 45% in the AC filter, while the antibacterial efficiency increased to 70% using the Ag-AC filter. Consequently, the Ag-AC filter can be an effective method to control bioaerosol and improve indoor air quality.