지열히트펌프와 공기열원 및 가스엔진 히트펌프의 온실가스 비교

정근주 대한건축학회지회연합회 2008 대한건축학회연합논문집 Vol.10 No.1

The GHG(Green House Gases) emitted by the building energy consumption was a serious problem to the global warming because the building energy consumption ratio was approximately 30∼40% to the all energy consumption. Recently, a lot of the building energy source Heat Pump installed for the air conditioning, the domestic water supply. Generally, the Heat Pump is classified the EHP(Electric Air-sourced Heat Pump), the GHP(Gas Engine Driven Air-sourced Heat Pump), the GSHP(Electric Ground-Sourced Heat Pump). As known, the reducing performance of GHG of GSHP is approximately 20∼ 25% higher than EHP and GHP. However, the published quantitative study on the performance of reducing annual GHG was rare case. Therefore, the purpose of this study is comparison of the GHG on EHP, GHP, GSHP based on conversion data of annual energy consumption of GSHP in the case building. According to this study, the GSHP GHG emission is 18.1% lower than EHP, 8.1% lower than GHP. (In this study, the fossil fuel GHG emission estimate due to the IPCC GHG estimation rule as well as the electric power GHG emission estimate due to the electric power production ratio of fuels, the efficiencies of power plant of fuels, the efficiency of electric power distribution in Korea. The case building is a child-care center of which all area is 2,119.2㎡ and GSHP capacity is 90RT and the location is Seoul Korea.)

전기구동 히트펌프(EHP)와 가스엔진구동 히트펌프(GHP)의 에너지소비량 및 환경부하 분석

김상훈(Sang-Hun Kim),임상채(Sang-Cae Lim),정광섭(Kwang-Seop Chung),김영일(Youngil Kim) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6

Energy is motive power that makes convenient society. But, our country's energy is depending on most import. Also, energy and environmental issue are important problem in community of nations. The purpose of this study is to analysis the energy consumption and environmental load of EHP and GHP in Medium and small-scaled office building. The annual energy consumption used to cooling and heating by EHP was 10 percent more than GHP. And annual energy cost of EHP was 33 percent more expensive than GHP. But, Compared to the annual CO₂ emission, EHP was 6 percent less than GHP. Therefore, equipment selection should be consider environmental load as well as energy consumption and cost.

전기구동 히트펌프(EHP)와 가스엔진구동 히트펌프(GHP)의 라이프 사이클 코스트 분석 - 부산지역 사무소 건물을 중심으로 -

정순성 대한건축학회 2005 대한건축학회논문집 Vol.21 No.8

This study was to propose the economical heat pump system of office building in busan. In order to select economical system at the pre-design phase, the research investigates cost items and cost characteristics during project process phases such as planning/design, equipment construction, maintenance/management, and demolition/sell phases. The study analyze the life cycle cost by sensitivity analysis of energy cost leading to propose the most economical system. The results of this study are as follows;(1) This study propose the cost breakdown structure of present worth method by EHP(electric heat pump) and GHP(gas engine driven heat pump) system. (2) In the LCC analysis of EHP system, the order of the rates in each phases shows maintenance/management, equipment construction, planning/design, and demolition/sell phases.(3) In the LCC analysis of GHP system, the order of the rates in each phases shows equipment construction, maintenance/management, planning/design, and demolition/sell phases.(4) The result of LCC15 of EHP and GHP system shows that the GHP system is advantage of office building in busan.

교육용 건축물의 히트펌프 냉난방시스템에 대한 경제성 분석 -24학급 규모의 고등학교를 중심으로-

박률,박민용,김종민,Park, Ryul,Park, Min-Yong,Kim, Jong-Min 대한설비공학회 2003 설비공학 논문집 Vol.15 No.10

Buildings with heating and cooling systems have been increased, since the requirement of thermal comfort for residents is grown. Heating and cooling systems, have been changed from two separate systems to one multi-function system which includes both heating and cooling. Especially, heat pump heating and cooling system has been adopted for general classrooms in schools since education environment improvement project has been launched. This research suggests the best option for the heat pump heating and cooling system in educational buildings through economic assessments for four alternative systems based on electric heat pump (EHP) and gas engine driven heat pump (GHP), which are most widely used for elementary, middle and high schools. The model buildings are in the Y high school which has 24 classes of new construction building, which will be built soon. Annual energy consumption for alternative systems uses BECS 3.10, which can be used for system simulation.

xEV용 냉난방 시스템 기술 개발 동향 연구

이호성(Ho-Seong Lee),원종필(Jong-Puhil Won),조규창(Kyu-Chang Cho),김용찬(Yong-Chan Kim) 대한설비공학회 2016 대한설비공학회 학술발표대회논문집 Vol.2016 No.11

The objective of this study is to explain the development trend of A/C system for xEV. Because the electrical energy must be spent for cooling and heating of the cabin for xEV(Electric-driven Vehicle, HEV, PHEV, FCEV, BEV) unlike ICEV(Internal Combustion Engine Vehicle), driving range per a charge of electric vehicles is reduced due to A/C conditioning system operation according to previous study. Especially, since heating system influences more than cooling system, efficient heating system is required to be development. Therefore, heat pump system has been considered as a substitute on behalf of electric heater. Because heat pump system with the air as a heat source has had some barriers to apply the vehicle, such as dehumidification of the cabin, frost concern of exterior heat exchanger as an evaporator when operating under lower ambient conditions, and unbalance heat capacity between exterior and interior heat exchanger due to different specifications, technical approaches have been studied, such as the heat pump with the coolant as a heat source, gas/liquid injection techniques. Even though heat pump systems have been investigated to deal with heat loads under the various operating conditions, electric heaters need to add deficient heat capacity under freezing conditions due to working fluid’s physical characteristics. Then, various electric heaters have been studied, such as air heating and coolant heating. To improve heating performance, various heating methods have been developed to find out optimum system.

사이클 해석을 통한 GHP 성능 예측

차우호,최송,정백영,김병순,전시문,Cha, Woo Ho,Choi, Song,Chung, Baik Young,Kim, Byung Soon,Jeon, Si Moon 대한기계학회 2015 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.3 No.1

가스 엔진 히트 펌프는 가스 엔진의 축동력으로 압축기를 구동하는 시스템으로 전력을 거의 사용하지 않고, 엔진 폐열을 활용하기 때문에 하절기와 동절기에 전력 Peak 를 억제하는 공조기로 주목을 받고 있는 제품이다. 제품 개발 시 시스템 성능 예측이 중요하므로 이를 위해 초기 설정한 운전점에서 열교환기 및 압축기의 특성을 반영하여 반복 계산을 수행하면 최종적인 운전점을 도출할 수 있고, 가스 엔진의 성능 데이터를 활용하면 가스 엔진 히트 펌프의 정확한 효율을 예측할 수 있다. 난방 성능을 예측할 때에는 엔진 폐열이 시스템에 공급되기 때문에 외부 열을 흡입하는 구간과 엔진 폐열을 흡입하는 구간을 동시에 고려해야 예측의 정확도를 높일 수 있다. 25 마력 가스 엔진 히트 펌프의 성능을 예측한 값은 실제 측정한 값과 비교하였을 경우 5% 정도의 오차가 발생하며 향후 성능 예측 모델을 구성되는 부품 특성을 반영하면 오차의 폭이 감소될 것으로 예상된다. In this paper a prediction method of GHP performance is proposed for increasing design accuracy. Two compressors with different capacity and 2311cc gas engine are used for prediction and the target capacity of GHP is 25HP. For predicting GHP performance at first the operation points are randomly selected and then as compared with compressor performance date and heat exchanger characteristic, more accurate operating points are decided through recursive calculation. Lastly engine performance date is used for calculating gas consumption volume. Predicting heating mode performance of GHP, evaporator is separated to the two section of absorbing heat in outdoor air and in engine. From the experimental results, it was found that the simulation model is good for the predicting GHP efficiency and the difference of predicted and measured efficiency is less than 5%.

냉방기기별 현장측정 및 조사

김성수(Sung-Soo Kim),강용태(Yong Tae Kang) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-

냉방기기별 하절기 가동률 및 동시사용률 실태를 조사하여 건물의 용도 및 면적 별 냉방기기의 시간별 부하률 과 동시사용률, 연간 사용일수 가동시간을 조사하여 냉방기기별 에너지 소비현황 하절기 에너지수급 영향분석을 하고자 하였다. 그리고 국내에 설치된 냉방기기를 대상으로 현장조사 진단을 통해 냉방기기 사용 실태 및 냉방성능을 측정하고, 현장 조사를 통한 만족도와 불만사항을 조사하여 냉방기기 보급 및 운전의 효율을 상승시키고 모든 냉방기기 국산화를 위한 기초자료와 이를 위한 정책적 지원방안 및 향후 냉방기기 기술개발 방향을 제시하고자 한다. 또한 냉방기기별로 문제점을 도출하여 향후 정책제도 개선에 반영할 수 있도록 하였다.

전력예비율 관점에서 건축물의 냉난방시스템별 최대수요전력 비교에 관한 연구

정순성(Jung, Soon-Sung) 한국주거환경학회 2012 주거환경(한국주거환경학회논문집) Vol.10 No.3

The social concern with maximum power demand by heating and cooling systems has been growing for the last several years. In particular, large-scale power outage occurred in September 2011. The purpose of this study is compare of maximum power demand in building's heating and cooling systems. The results of this study are as follows; 1) Maximum power demand per 1usrt of electric heat pump system is the summer 1.248kw, winter 1.335kw. maximum power demand per 1usrt of gas engine driven heat pump system is the summer 0.1398kw, winter 0.1329kw. maximum power demand per 1usrt of absorption chiller-heater + constant air volume system is the summer 0.5996kw, winter 0.4590kw. 2) The result of maximum power demand per 1usrt of building's heating and cooling system, the order of viewpoint of maximum power demand was gas engine driven heat pump system, absorption chiller-heater + constant air volume system and electric heat pump system.

GHP/EHP 하이브리드 시스템에서 최적운전 조건 결정을 위한 연간 에너지사용 비용 시뮬레이션 연구

황일남(Ilnham HWANG) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6

This study evaluates several operation logics of hybrid GHP(Gas engine Heat Pump) by calculating yearly energy cost based on a specific hybrid GHP system compared with EHP(Electric Heat Pump) system having equivalent capacity. The maximum energy cost saving of gas and electricity was 17.9% and it was achieved when the hybrid GHP has the operation logic where EHP only operates under 40% load demand and both of EHP and GHP operate above 40% load demand except GHP running under -5℃. Main factor of energy cost saving is decreased amount of basic electricity fee by reducing peak power consumption of EHP side. Saving differences between several logics were less than 3% and these differences will change if weather condition or energy cost changes.

소규모 학교의 냉난방 및 신․재생에너지시스템 적용방안에 관한 연구

김지연(Kim Ji-Yeon),박효순(Park Hyo-Soon),김성실(Kim Seong-Sil),서승직(Suh Seung-Jik),현종훈(Hyun Jong-Hun) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.12

The study aims to research air-conditioning and new & renewable energy application methods that can reduce energy and operation costs considering initial costs. By searching the optimum application methods, it is expected to maximize the cooling/heating and hot water supply energy and improve efficiencies of systems for educational facilities. Therefore, this study implemented a research on the new & renewable energy utilization technique diffusion expansion method and the optimum method. As a result, the plan which has the least life cycle cost was introduced with the multi-type geothermal heat pump 255.2㎾ + highly efficient electronic cooling/heating device (EHP) 168.2㎾. On the other hand, the plan which have the least energy cost was induced as the multi-type geothermal heat pump 174㎾ + solar heat collector 94 m² + highly efficient electronic cooling/heating device (EHP) 249.4㎾.