Mobile QR Code QR CODE : Korean Journal of Air-Conditioning and Refrigeration Engineering
Korean Journal of Air-Conditioning and Refrigeration Engineering

Korean Journal of Air-Conditioning and Refrigeration Engineering

ISO Journal TitleKorean J. Air-Cond. Refrig. Eng.
  • Open Access, Monthly
Open Access Monthly
  • ISSN : 1229-6422 (Print)
  • ISSN : 2465-7611 (Online)

Korean Journal of Air-Conditioning
and Refrigeration Engineering

A journal devoted to investigations of HVAC and building technologies in various climatic conditions

• Editors-in-Chief: Doosam Song

현장 실측을 통한 지하철 터널 내에 설치된 블라스터 댐퍼 자연환기 성능 A Natural Ventilation Performance of Blast Damper installed in Subway Tunnel Using Field Measurements

Soo Kwon Jung ; Sung Woo Cho

This study investigated ventilation performance by field measurement of blaster damper equipped in subway tunnels. Results are summarized as follows. Ventilation rate to remove generated heat load by running within a subway tunnel was calculated to be 18.55 m3/s. During train passage time (06:00~09:00) in the reference tunnel, the average air flow velocity was measured to be 2.97 m/s and the ventilation rate through blaster damp was calculated to be 33.26 m3/s. Natural ventilation through blaster damp was judged to be sufficient. However, the air volume due to piston effect during train running was 52.7% greater than that through the blaster damper. As the air volume due to the piston effect occurs simultaneously with heat accumulation or heat removal within the tunnel, it is necessary to consider changes in surface temperature inside the tunnel.

HVAC 제어를 위한 동적 멤버십 함수 구성 퍼지 시스템 Dynamic Generation of Membership Function of Fuzzy System for HVAC Control

Youngmin Ji ; Dongwoo Kwon

It is difficult to satisfy the thermal comfort of each individual through the current air conditioning system. However, based on collected data, it is possible to calculate the optimal indoor thermal comfort level that can satisfy building occupants. The optimal set temperature calculated based on the knowledge base will maintain an appropriate indoor temperature and reduce the energy of overcooling and overheating. Additionally, it can save energy by recognizing indoor occupants and turning off heating and cooling machines when nobody is present. To satisfy occupant thermal comfort, fuzzy logic was used for fast dynamic control based on occupant recognition. In this paper, we implemented the idea in practice by applying it to our laboratory environment. Finally results were evaluated.

물 흐름 글레이징 기술을 적용한 온실용 외부 피복재의 광학적 특성에 관한 실험적 연구 An Experimental Study on Optical Properties of Greenhouse Exterior Cladding with Water Flow Glazing Technology

Juhee Jeong ; Youngjun Jo ; Woo-jung Shin

In this study, basic research was conducted to apply WFG (Water Flow Glazing) technology effectively in greenhouses for infrared blinding. Experiments were conducted with different test specimens based on PMMA thickness and water layer thickness utilizing both natural and artificial light sources. Results demonstrated that the water layer effectively blocked infrared radiation. However, differences in PMMA thickness were minimal, while variations in water layer thickness were evident. WFG technology is proven to be an effective solution for adapting to changing climates. It is feasible even in extreme climatic conditions.

에너지 성능, 경제성, 사용자 선호도를 고려한 그린리모델링의 우선 적용기술 도출 방안에 관한 연구: 국공립어린이집을 대상으로 A study on the Method of Priority Application Technology of Green Remodeling Considering Energy Performance, Economics and User Preference in Public Daycare Centers

Mi Hyeon Eom ; Chang Young Park ; Seong Hyun Park ; Chang Ho Choi

This study derived benefits of green remodeling technologies that can be utilized in public daycare centers. Energy simulations were performed using ECO2-OD. Economic feasibility was evaluated using net present value to analyze expected effects of green remodeling. As a result of the analysis, primary energy consumption was reduced by an average of 31%. The average net benefit was -229,592,867 KRW. The ranking of green remodeling technologies was derived by considering energy savings, economics, and user preferences. Their rankings were placed in the order of PV systems, boilers, windows, insulation, air conditioners, ventilation systems, and lighting. Applying green remodeling technology priorities established by this study will allow us to implement green remodeling with higher energy savings and lower costs than current green remodeling consulting results.

국내 목재펠릿 연소 보일러(가정용 및 산업용) 및 스토브에 대한 배기가스 배출특성 연구 Emission Characteristics for Wood Pellet Boilers - Domestic and Industrial Boilers

Sae Byul Kang ; Geun Hee Han ; Hyun Hee Lee ; Soo Min Lee ; Jae-Heun Oh ; Hanseob Jeong ; Hyun Kyu Chae ; Sang Hee Ma ; Saet Byul Lee ; Seung-Rok Lee ; Gyu-Seong Han

Emission Characteristics for Wood Pellet Boilers - Domestic and Industrial Boilers