• Title/Summary/Keyword: Payback Period

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Study on The Development and Economic Evaluation of Solar Drying System for Wood Industry (목재산업용(木材産業用) 태양열(太陽熱) 건조장치(乾燥裝置)의 개발(開發)과 경제성분석(經濟性分析)에 관한 연구(硏究))

  • Lee, Hyoung-Woo
    • Journal of the Korean Wood Science and Technology
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    • v.20 no.1
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    • pp.5-14
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    • 1992
  • Experimental external collector type solar lumber dryer of $1m^3$ of maximum capacity with $1.6m^3$ of collector area was designed and constructed. The seasonal performance of solar dryer, including air-conditions, energy efficiency, and drying characteristics of 3cm-thick red pine and douglas-fir lumber was investigated. Also, the economic analysis was carried out. Annual average solar drying rate was about 2 times faster than air-drying rate with no significant difference in the amount of drying defects. But in initial drying stage air-drying rate in winter was much faster and those in spring and autumn were slightly slower than solar drying rate in each season. Annual average energy efficiency of solar-dryer and-collector was 25% and 57%, respectively. Fuel savings were over 50% at 15% of energy inflation rate and the payback period was estimated as 6.10 years at 30% of energy inflation rate.

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Economic Feasibility of a Hypothetical Shrimp Farm a Combination of Semi-Closed Raceways and Ponds (시범 새우양식장의 경제적 타당성 연구)

  • 이재후
    • The Journal of Fisheries Business Administration
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    • v.13 no.1
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    • pp.85-97
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    • 1982
  • This study involves a blending of intensive and extensive shrimp culture techniques for a hypothetical shrimp farm which uses a combination of heated raceway nurseries and extensive grow-out ponds per year. The present value method of economic analysis is used to determine economic feasibility. The biological data in this reports were obtained from published or personal communications from leaders in the field of shrimp aquaculture. The proposed system showed economic feasibility using the present value method with discount rates of 10% and 12%. The most profitable scenario, the culture of three crops of Penaeus vannamei showed a 1.26 year payback period and 120% annual average rate of return. The breakeven price was $1.25/1b., which is $1.52 less than the market price of $2.77. Breakeven production was 724 1bs/acre, which is 8761bs. less than the assumed 1,600 1bs/acre. All other scenarios 1.2 and 3 crops for P. stylirostris and P. setiferus showed economic feasibility also.

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A Study on the Application of District Heating System using Sewage Source (하수열원을 이용한 지역난방 적용성 검토)

  • Kim, Sang-Hun;Kim, Dong-Jin;Choi, Dong-Kyoo
    • Proceedings of the SAREK Conference
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    • 2009.06a
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    • pp.928-933
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    • 2009
  • The purpose of this study is to examine the energy consumption, carbon dioxide emission & energy cost of district heating using sewage source. The annual TOE of heat pump using sewage source save 37.1 percent than city gas boiler. And annual carbon dioxide emission of heat pump cut down 41.3 percent than city gas boiler. If it charges the rate schedule for district heating to apartment resident, collected amount are 3,127,170 thousand won. As energy cost of heat pump & circulation pump are 1,378,072 thousand won. the profits are 1,749,098 thousand won. As payback period is 8.97years, applicability is low level. However, it has advantages in energy consumption, carbon dioxide emission & energy cost. Therefore, it needs to proceed through government assistance.

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Methodology of Feasibility Assessment for Small Hydropower Plant (소수력발전소의 건설 타당성분석 기법)

  • Park, W.S.;Lee, C.H.;Jeong, S.M.
    • Solar Energy
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    • v.18 no.3
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    • pp.153-160
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    • 1998
  • The methodology and feasibility analysis model for small hydropower plant has been studied and developed. It consists of two main part, the performance prediction model to estimate the performance characteristics and economics anaysis model to evaluate economical characteristics for surveyed sites. The performance characteristics and feasibility assessment for surveyed sites were analyzed, using developed models. Also, primary design specifications such as design flowrate, capacity, load factor were estimated and discussed for surveyed sites in Dan-yang and feasibility was suggested through analyzing the investment, unit cost and payback period.

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A Study on Unused Energy Management of Jeju City Waste Environment Center (제주시 폐기물환경사업소의 미활용에너지 활용방안 연구)

  • Kim, S.H.;Kwon, K.R.;Park, Y.C.
    • Journal of Power System Engineering
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    • v.8 no.1
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    • pp.48-54
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    • 2004
  • In this study, waste heat of Jeju City Waste Environment Center is investigated and the utilization method is suggested with economical analysis of additional investment that needed for new facility. Energy balance of the typical facilities is considered in this study such as incineration plant and LFG power plant. The payback period of the investment which is used for the LFG power plant waste heat utilization facility is about 2.4 years and the economic profit of the facility during 10 years operation is up to 926 million won.

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Economic Assessment of a Wind Farm Project Using Least Square Monte-Carlo (LSMC) Simulation (최소자승몬테카를로 시뮬레이션을 이용한 풍력발전설비 투자계획)

  • Kim, Jin-A;Lee, Jong-Uk;Lee, Jae-Hee;Joo, Sung-Kwan
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.1
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    • pp.32-35
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    • 2011
  • The economic value of a wind farm project is influenced by various risk factors such as wind power output and electricity market price. In particular, there is uncertainty in the economic evaluation of a wind farm project due to uncertain wind power outputs, which are fluctuated by weather factors such as wind speed, and volatile electricity market prices. This paper presents a systematic method to assess the economic value and payback period of a wind farm project using Least Square Monte-Carlo (LSMC) simulation. Numerical example is presented to validate the effectiveness of the proposed economic assessment method for a wind farm project.

Economic Evaluation of BESS (Battery Energy Storage System) (전지전력저장시스템의 경제성분석)

  • Kim, Jae-Chul;Choi, Joon-Ho;Kim, Eung-Sang;Choi, Byoung-Soo;Lee, Young-Ha;Hwang, Yong-Ha
    • Proceedings of the KIEE Conference
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    • 1998.07c
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    • pp.1091-1093
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    • 1998
  • The BESS has a major advantages such as load leveling, quick response emergency power (spinning reserve), frequency and voltage control, improvement of reliability, and deferred generation and transmission capacity construction. However, the economic feasibility of these systems requires justification from the customer side of meter. In this paper, we proposed the economic evaluation model of BESS which is modified and complemented the SYSPLAN model[2]. In addition, we analyzed a economic evaluation from the economic measures such as payback period, overall benefit, ROI, and ROR.

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Study on the Performance of an ATES Geothermal Heat Pump System and Economic Analysis (ATES 열펌프 시스템 성능 및 경제성 분석에 관한 연구)

  • Oh, Myung-Suk;Choi, Jong-Min
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.24 no.4
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    • pp.289-296
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    • 2012
  • The aim of this study is to investigate the performance of a heating and cooling system with aquifer thermal energy storage(ATES heat pump system) known as one of the underground thermal energy storage application systems. The ATES system was composed of heat pump unit and ATES, which was installed in a factory building located in Anseoung. The system represented very high heating and cooling performance, and showed nearly constant COP at each heating and cooling season due to the stability of EWT. The economic analysis about an ATES system and a conventional system was also executed. The conventional system adopted an air-conditioner in the summer season and a LNG boiler in the winter season. The payback period of the ATES system was estimated by 6.62 years.

Energy and Cost Efficiency on applying Solar Control Facade System (일사조절 장치 적용에 따른 에너지 및 비용효과 분석)

  • Ahn, Ki-Uhn;Kim, Seong-Jin;Kim, Dong-Hee;Moon, HyunSeok
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2013.11a
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    • pp.98-99
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    • 2013
  • Recently, solar control facade systems are highlighted due to its low cost and outstanding applicability for green remodeling. However, it has not been long time since the systems were introduced. Therefore, the application study of the solar control system also has been insufficient. In this study, simulated models were developed and three types of solar control systems(i.e., overhang, blind, and screen)are installed in the models. The efficiency of energy savings and investment payback period according to the application of solar control facade system were analyzed.

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Economic analysis of Electric heating appliances (전기난방기구의 경제성 분석 비교)

  • Kim, Yong-Ha;Lee, Kwang-Sung;Nam, Kim-Hyun;Park, Nam-Chul;Woo, Sung-Min;Kim, Mi-Ye;Lim, Hyun-Sung
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2006.05a
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    • pp.448-452
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    • 2006
  • Many kinds of electric heating appliance is used by user interface and desire. Far infrared ray heating system can use a kind of main heating appliance. This paper gives un saving amounts, energy curtailment money and payback period between far infrared ray heating system and existing electric heating appliance - EHP, electric air heater, electric radiator, electric floor heating system - from economy analysis.

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