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Ergonomic and performance analysis of rail-type boom sprayer for agro-photovoltaic power system
김락우,한재웅,김웅 충남대학교 농업과학연구소 2022 Korean Journal of Agricultural Science Vol.49 No.1
This study was conducted to develop a rail-type boom sprayer, performing safe spraying with improved ergonomic postures during pesticide spraying of agro-photovoltaic power system. The sprayer was designed to reduce labor cost and to be safe from pesticide exposure, and was analyzed through a comparison with a conventional spray method. The rail-type boom sprayer, consisted of a self-propelled spray and hose winder, hose, and boom sprayer parts, was designed to automatically pull and spray in the vertical and horizontal directions. The performance of the sprayer for an agro-photovoltaic power system was appropriate. From the analysis of postures with the Ovako Working posture Analysis System (OWAS), Rapid Entire Body Assessment (REBA), and Rapid Upper Limb Assessment (RULA) methods, the musculoskeletal risk factors to the body using the rail-type boom sprayer were less than those with the conventional power sprayer. In addition, the possibility of pesticide poisoning was reduced compared to the conventional power sprayer. The working capacity with the rail-type boom sprayer was more than five times greater, compared with the conventional power sprayer. After performing pesticide spraying with the rail-type boom sprayer, the labor cost was reduced to 42,750 won·yr-1, which was 90% (402,750 won·yr-1) less than the cost with the use of a conventional power sprayer (445,500 won·yr-1).
손희철(Sohn, Hee Cheoll),박현준(Park, Hyun Jun),김영신(Kim, Young Sin) 한국지역사회학회 2019 지역사회연구 Vol.27 No.2
본 연구는 ‘재생에너지 3020’의 일환으로 추진되는 태양광 발전 정책의 사업타당성 및 경제성을 분석하여, 영농형 태양광 사업을 고려하고자 하는 정책입안자, 예비사업자, 농가 등에 사실적이고 객관적 판단 자료를 제공하는 것으로 목적으로 하였다. 국내 태양광 발전 사업의 대부분이 수익성을 높이기 위해 외부간섭이 적고 대규모 설치가 가능한 농촌 및 산림 지역에 설치되었다. 하지만 태양광 설비를 이용 발전사업을 하는 주체는 농촌지역 거주자가 아닌 외지인이 주도하고 있기 때문에 주민들은 태양광 발전부지 임대소득 이외에는 특별한 수익이 발생하지 않아, 주민수용성이 악화된다는 문제점이 지적되어 왔다. 본 연구는 농사와 태양광발전을 동시에 진행하는 영농형 태양광 발전사업에 대한 경제성을 분석하였다. 경제성 분석결과 기본가정에 의한 경우 비용 대비 편익 값은 1.08로 도출되어 경제성이 있는 것으로 분석되었다. 또한 실제 영농형 태양광 발전사업을 추진한다는 가정 하에 차입금 비중에 따른 민감도 분석도 함께 실시하였다. 분석결과 차입금 비중이 증가할수록 경제성이 높아지는 것으로 분석되었다. 본 연구 결과는 영농형 태양광 사업을 적극적으로 보급하는데 정부 보증의 형태가 정책적 효과가 있을 것임을 보여준다. The purpose of this study is to provide objective judgment data to policymakers, preliminary operators and farmers who want to consider agro-photovoltaics power generation business by economic analyzing on photovoltaics power generation policy that is promoted as part of ‘renewable energy 3020’. Most of the photovoltaic power generation projects were installed in rural areas where there is little external interference and large installations to increase profitability. However, the problem is that the residents do not have any special income other than the rental income of the photovoltaic power generation site, and the residents’ acceptability deteriorates because the power generation business using the photovoltaic facility is led by the outsider rather than the resident of the rural area. This study analyzed on the agro-photovoltaics power generation project which simultaneously conduct agriculture and solar power generation. As a result of the economic analysis, it is analyzed that the cost - benefit value is 1.08, which is economical. We also conducted sensitivity analysis based on the proportion of borrowings under the assumption that we are promoting a real farm-based photovoltaic power generation business. It is analyzed that as the more proportion of borrowings increases, the more feasibility increases. These results show that the type of government guarantee will have a policy effect in aggressively promoting agro-photovoltaics power generation projects.
유선호,이의찬,손승우,김봉석,Sunho, Yu,Eui-Chan, Lee,Seungwoo, Son,Bongsuck, Kim 한국전력공사 2022 KEPCO Journal on electric power and energy Vol.8 No.2
The transition to renewable energy, especially the expansion of photovoltaic (PV) generation, has become a global megatrend that can no longer be reserved. However, since the site for PV is limited, it is necessary to use the land efficiently. As an alternative, the concept of utility scale agricultural PV(UAPV) is a technology that continues farming in the lower part and installs PV in the upper part of farmland to efficiently use the land. Therefore, for UAPV, the growth of crops in the lower part and the optimal operation of PV in the upper part are important. In this, we analyze the characteristics of the upper PV generation system in the UAPV based on the empirical results under various conditions, and propose future research directions of the UAPV.