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유리 온실 시설의 연간 냉난방 부하 및 에너지 시뮬레이션에 관한 연구
장재철(Jang Jea-Chul),강은철(Kang Eun-Chul),이의준(Lee Euy-Joon) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.- No.-
A peak cooling and heating load(㎾/㎡) and annual energy(㎾h/㎡ㆍyr) have been simulated for a special greenhouse located near Seoul. The special facility was designed for living plant and butterfly with many visitors. The design conditions for the facility have been discussed with the designer and simulated with the weather and building conditions. The load and energy simulation was done by TRNSYS 15 based on IPMVP 4.4.2.'s simulation requirement. The results have been shown in terms of area(㎾/㎡) and volume load and energy index(㎾h/㎡ㆍyr). Considering the higher height of the facility, The results came out reasonably comparing the index of a typical commercial building signed as 462㎾h/㎡ㆍyr
장재철(Jea Chul Jang),강은철(Eun Chul Kang),송준익(Jun Ik Song),김지영(Ji Young Kim),이의준(Euy Joon Lee) 한국지열·수열에너지학회 2009 한국지열에너지학회논문집 Vol.5 No.2
In this paper, RETScreen program model has been investigated to predict the economic analysis for greenhouse and livestock facility. Load calculation result was 35.2[㎾] of greenhouse and the calculation result of livestock facility was 35.5[㎾]. Also, a case study of the RETScreen program indicated that the equity payback is 6.9 years for a greenhouse facility and the equity payback is 9.5 years for a livestock facility.
P/T 프로브를 이용한 현지 지중 유효열전도도 측정기술에 관한 연구
김지영(Ji-Young Kim),장재철(Jea-Chul Jang),강은철(Eun-Chul Kang),장기창(Ki-Chang Chang),이의준(Euy-Joon Lee) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The ground thermal conductivity(k) is thus a key parameter in designing BHE(Borehole Heat Exchanger) and coupled geothermal heat pump systems. Currently, although a thermal hydraulic response test(TRT) is mostly used in practice, the thermal hydraulic TRT needs additional power and is generally time-consuming. A new, simple wireless P/T probe for a hi-speed k determination was introduced in this paper. This technique using a P/T probe is less time-consuming and requires no external source of energy for measurement and predicts local thermal properties by measuring soil temperatures along the depth. Measured temperature data along the depth was analyzed. In order to verify the new technique for the determination of k, k that calculated from the measured temperature data using a P/T probe was compared with one obtained from conventional hydraulic TRT. As a result, the P/T probe can replace the conventional hydraulic TRT method after carrying out the additional research on a lot of sites.
A Study on Building Integrated Design and Commissioning of GHP System
김지영(Kim, Ji-Young),장재철(Jang, Jea-Chul),강은철(Kang, Eun-Chul),장기창(Chang, Ki-Chang),이의준(Lee, Euy-Joon) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
Geothermal heat pump(GHP)system has been extensively disseminated due to the recent increasing demand over new and renewable energy. However, the economics and system reliability has been key issues and barriers to insure a better system performance as designed originally. The building integrated designs of geothermal heat pump system are test and optimize GHP system by evaluating its performance in virtual reality. System design is an iterative process that will help optimize the cost efficiency of the system. One of the primary goals is to minimize the energy imbalance between the amount of energy extracted from the ground and the energy reject to it. This will reduce the land area required to install the GHX, reduce the cost of installing it and ensure the long-term efficiency of the system. Commissioning is the process of ensuring that are designed, installed, functionally tested, and capable of being operated and maintained to performance in conformity with design intent. In this paper, Study on introduction of Initial commissioning method of Geothermal Heat Pump(GHP) system using ISO performance data has been introduced. Also KIER GHP Simulator is used to simulate actual heat pimp operating condition and test commissioning method. Result should that the experiment data base could verify the applicability of the commissioning method, and also were able to suggest a better ways to GHP commissioning.
P/T 프로브를 활용한 현지 지중열전도도 해석기법에 관한 연구
김지영(Ji-Young Kim),장재철(Jea-Chul Jang),강은철(Eun-Chul kang),장기창(Ki-Chang chang),이의준(Euy-Joon Lee) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
The ground thermal conductivity(k) is thus a key parameter in designing Ground Heat Exchanger and coupled geothermal heat pump systems. Currently, although a thermal hydraulic response test(TRT) is mostly used in practice, the thermal hydraulic TRT needs additional power and is generally time-consuming. A new, simple wireless P/T probe for a hi-speed k determination was introduced in this paper. This technique using a P/T probe is less time-consuming and requires no external source of energy for measurement and predicts local thermal properties by measuring soil temperatures along the depth. Measured temperature data along the depth was analyzed. In order to verify the new technique for the determination of k, k that calculated from the measured temperature data using a P/T probe was compared with one obtained from conventional hydraulic TRT. As a result, the P/T probe can replace the conventional hydraulic TRT method after carrying out the additional research on a lot of sites.
시설원예 적용 수평형 지열히트펌프 시스템의 운전 분석에 관한 연구
김지영(Ji-Young Kim),장재철(Jea-Chul Jang),강은철(Eun-Chul Kang),장기창(Ki-Chang Chang),이의준(Euy-Joon Lee) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
This paper is about analyzing the horizontal ground loop heat exchanger(GHX) in a ground source heat pump(GSHP) system's operation. A ground loop heat exchanger is an important unit that determines the thermal performance of a system and its initial cost. Currently most of the ground source heat pump system has been applied to vertical type GHX. However, the system has problems of high initial cost. A horizontal type GHX compared to the vertical type GHX, low-cost and reliable performance can not guarantee. In this study, the horizontal type GHX ground source heat pump system was applied to the green house. And we observe the system operation condition. As a result we catch this system problem of GHX design and propose solution using KD2 PRO device, GLD program.