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고효율 VRF 히트펌프와 에너지 관리시스템 RMS를 이용한 Green Energy Solution
문제명(Jemyung Moon),이창선(Changseon Lee),구형모(Hyungmo Koo),권형진(Hyungjin Kwon) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
As part of the Green Energy Solution Policy and in order to contribute to the Green Growth Korea Campaign, Vapor injection cycle adopted high efficiency VRF heat pump System DVM Plus Ⅳ, Geothermal VRF heat-pump system DVM Geo, and energy management system, the RMS, which can reduce the loss of energy during the use of high efficiency equipment, have been developed and thus a Total Energy Solution System erected. The DVM Plus Ⅳ emits 17.4% less CO2 when compared to previous heat-pump models. Furthermore, by using the system control solution, an additional 12.4% CO2 emission has been reduced, adding to a total of 30% reduction. The DVM Geo provides a 77.8% TCO2 reduction per year when compared to standard gas boilers.
멀티형 에어컨의 기간에너지소비효율 평가규격에 관한 연구
박윤철,문제명,홍주태 대한설비공학회 2004 설비공학 논문집 Vol.16 No.1
Energy efficiency evaluation method for a multi-type air conditioning system still has not been developed. In this study, analysis on capacity range and evaluating method of standards for air conditioners was conducted with world-wide Standards. It is not a proper approach to use the standards for residential air conditioner to multi type air conditioners. Some difficulties and problems are commented in this study with overview of the standards. Through the analytic research, an evaluating method for multi type air conditioner was suggested with Integrated Part Load Value (IPLV). The suggested concept for evaluating energy efficiency during part load condition considers building load pattern and operating hours of the system at different locations. Load was weighted in IPLV to consider not only the concept of occurrence of outdoor temperature such as bin method but also operation hours of the system.An experiment about the IPLV was conducted with variable air volume ducted type air conditioning system and multi-type system through modified code tester to give a glance at quantitative value of the IPLV.
퍼지 알고리즘을 이용한 시스템 에어컨의 냉매충전량 감지 프로그램 개발
태상진,최창식,김훈모,조금남,문제명,김종엽,권형진 대한설비공학회 2006 설비공학 논문집 Vol.18 No.2
This study developed a program for detecting charged refrigerant amount in system air-conditioner. System air-conditioner is an air-conditioning system with multiple indoor units. Due to the complexity of the system, it is more difficult to detect the refrigerant amount charged in the system air-conditioner than in a general single air-conditioner. Experiments were performed for a 6HP outdoor unit with 3 indoor units in a psychrometric calorimeter. The experimental amount of the charged refrigerant was ranged from 60% to 140% with 10% increasement. Fuzzy algorithm was employed for detecting the charged refrigerant amount in the system air-conditioner. The experimental data were used for curve-fitting for the general ranges of indoor and outdoor temperature conditions. Membership function was determined for the whole ranges of experimentally measured data and rule-bases were defined for each charged refrigerant amount. Developed program successfully predicted the measured data within 10% resolution range.
PWM 방식과 인버터 방식을 사용한 시스템 에어컨의 성능평가에 대한 실험적 연구(난방저온 특성)
김대훈,전용호,권영철,이윤수,문제명,홍주태 대한설비공학회 2003 설비공학 논문집 Vol.15 No.7
The present study concerns an experiment on the heating characteristics of a system air-conditioner (A/C) using PWM method or inverter method at low temperature con-ditions. The compressors used are digital scroll type and BLDC inverter type. Under the low outside temperature condition, -5$^{\circ}C$, -1$0^{\circ}C$, -15$^{\circ}C$, heating capacities and COPs are mea-sured by the psychometric calorimeter using air enthalpy method. Also, outlet air temperatures at heating operation mode are measured at -5$^{\circ}C$, -1$0^{\circ}C$ and -15$^{\circ}C$. Experimental results show that COPs of the system A/C using a PWM method are more effective than those of the inverter method at heating operation mode. Although the heater is on, COPs of PWM method are similar to those of BLDC inverter method. Moreover, the heating capacities of PWM method at -5$^{\circ}C$, -1$0^{\circ}C$ and -15$^{\circ}C$ are larger about 10~20% and outlet air tempe-rature at -15$^{\circ}C$ is larger about 10%, compared to the inverter method.