• Title/Summary/Keyword: Heating cost

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The Economic Analysis on the Heating System Remodeling by the Life Cycle Costing in Permanent Rental Apartment (LCC 기법을 이용한 영구임대아파트 난방방식 리모델링에 대한 경제성분석 -유지관리비용을 중심으로-)

  • 박민용;장승재
    • Journal of the Korean housing association
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    • v.15 no.1
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    • pp.33-40
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    • 2004
  • Considering the present development situation of rental apartment since 1982, the supply of rental housing for low-income dwellers has contributed a amount of quantities, but has been deficient qualities in housing policy. To propose the device of remodeling for low-income dwellers in deteriorated apartment, this study investigated the energy consumption of central heating system and the characteristics of maintenance cost in permanent rental apartment. The results of evaluation of alternative heating systems by Life Cycle Costing in permanent rental apartment were as follows; From Life Cycle 15∼20 years by Present Worth Method, the economic heating system of remodeling is central heating system (heat source: B-C oil), unit heating system(natural gas), central heating system(natural gas) in order.

Operating Cost Analysis of a High Temperature Ground Source Heat Pump System for a Greenhouse (시설원예용 대온도차 지열원 히트펌프 운전비용 효과 분석)

  • Kang, Shin-Hyung;Park, Seung Byung;Choi, Jong Min
    • Journal of the Korean Society for Geothermal and Hydrothermal Energy
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    • v.12 no.1
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    • pp.17-22
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    • 2016
  • It is very important to obtain a out-of season production in horticultural greenhouses corresponding with higher crop prices. A ground source heat pump system has been highly spotlighed as an energy efficient heating system for the greenhouse. This paper investigated the operating cost of the ground source heat pump system with the variation of generating temperature and designing methods for heating system of the greenhouse. Even though the COP of the ground source heat pump system decreased with an increment of generating temperature in heating mode, the operating cost could be reduced. By adopting the high temperature heat pump system and heat storage tank, it could be achieved to save energy and reduce the operating time of auxiliary oil heating system for producing good plant-growth in the greenhouse.

Economic Study on Heating load by Balcony Remodeling in use of Energy Simulation Program (에너지 시뮬레이션을 이용한 발코니 개조에 따른 난방부하 경제성 고찰)

  • Kim, Sung-Woo;Park, Sang-Hyun;Lim, Jung-Hee;Kim, Byung-Seon
    • Proceedings of the SAREK Conference
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    • 2006.06a
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    • pp.801-806
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    • 2006
  • Balcony space effects indoor thermal environment. When balcony is extended, problems would be made such as noise, dew condensation, over heating energy, and etc. Extend of balcony increase heating load about 47%. occupants must consider remodeling for their balcony. This paper compare extended balcony with unextended balcony on heating load in use of energy simulation program. According to increase heating load, we expected that building heating cost would be increased by extend balcony. To consider extend balcony, occupants must be funished with better date between healing cost increasing and floor area increasing.

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Energy Saving Effects of Carbon Nano Heating Pipe for Heating of Greenhouse (탄소나노히팅파이프를 이용한 온실 난방에너지 절감효과)

  • Paek, Y.;Jeon, J.G.;Yun, N.K.
    • Journal of the Korean Society of Mechanical Technology
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    • v.13 no.3
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    • pp.107-111
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    • 2011
  • This carbon nano heating system was consisted of power supply equipment, a carbon fiber and a stainless flexible hose. carbon nano heating system was manufactured by carbon fiber of a power capacity 30kw/h and light-oil hot air heater in control plot was the heating capacity 30,000kcal/h, As the result, Temperature difference due to carbon nano heating system and hot air heater in greenhouse showed that air temperature at experimental greenhouse, comparison greenhouse were $14.8^{\circ}C$, $13.4^{\circ}C$ respectively. It was found that carbon nano heating system and light-oil hot air heater heating cost were 1,095,740won, 2,683,628won. therefore as heating cost saving 60%. Yield of tomatoes cultured in greenhouse using carbon nano heating pipe was 4% inclease. Economic analysis comparison between the carbon nano heating pipe and the hot air heater in greenhouse were 41% respectively.

A Study on the Space Size Analysis in the Multifamily Housing in aspect of management cost. -Focused on the Central Heating System using the diesel, kerosene- (공동주택 관리비용에 따른 적정공간규모 산정에 관한 연구 -경유, 등유를 사용하는 중앙집중난방방식을 중심으로 -)

  • 이강희;양재혁
    • Journal of the Korean housing association
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    • v.13 no.5
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    • pp.89-99
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    • 2002
  • The multifamily housing has various advantages in construction cost, land-use intensity. KRIHS(1997) recommended the proper scale of th multifamily housing as 800 households in constructability, 1,000 households in facility compactability, 500 households in social aspect. At the early planning stage of project, the size of the multiftmily housing has, until now, been maximizingly considered under the regulation on which has been emphasized at the building volume ratio, land area, etc., except for the expenditure during the maintenance stage. This paper aimed at providing the proper size of multifamily housing in aspect of area and household number with maintenance cost at the early stage of project. For these, it took 곧 average cost function which is made from the 3-rd quardratic form and analyzes the unit increasing rate of the average cost. It surveyed in nationwide focused on the central heating system using diesel and kerosene. The number of samples is 88 and items of management cost is 11. The results are as follows ; first, 3rd-order quadratic function is proper at explaining the cost variation, considering the multicollinearity and statistics. Second, the proper size of multifamily housing is recommended with 83,000 $m^2$ on management area, 820 or over the 2,630 household number in aspect of total management cost.

A Study of Comparative Economic Evaluation for the System of Ground Source Heat Pump and District Heating and Cooling:Focusing on the Analysis of Operation Case (지열히트펌프와 지역냉난방 시스템의 운영사례를 중심으로 경제성 비교분석 연구)

  • Lee, Key Chang;Hong, Jun Hee;Kong, Hyoung Jin
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.28 no.3
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    • pp.103-109
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    • 2016
  • The purpose of this study is to perform comparative economic evaluation for the systems of ground source heat pump (GSHP) and district heating and cooling (DHC) by focusing on the analysis of operation case of GSHP. The adapted research object is a public office building located in Seoul. The capacity of ground source pump is about 3,900 kW. Ground heat exchanger is closed loop type. The analysis period for life cycle cost is 30 years. Economic evaluation is assessed from the viewpoints of the following four parts: initial cost, energy cost, maintenance and replacement cost, and environment cost. The total life cycle cost of GSHP is approximately 8,447 million won. The cost of the DHC System is approximately 3,793 million won. The cost of the DHC is approximately 46% lower than GSHP system under the condition of current rate for GSHP and DHC.

Optimization Design of Solar Water Heating System based on Economic Evaluation Criterion using a Genetic Algorithm (유전알고리즘 이용 경제적 평가기준에 따른 태양열급탕시스템 최적화 설계에 관한 연구)

  • Choi, Doosung;Ko, Myeongjin;Park, Kwang-Tae
    • Journal of the Korean Solar Energy Society
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    • v.36 no.5
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    • pp.73-89
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    • 2016
  • To assure maximum economic benefits and the energy performance of solar water heating systems, the proper sizing of components and operating conditions need to be optimized. In recent years, a number of studies to design optimally solar water heating systems have been tried. This paper presents a design method for optimizing the various capacity-related and installation-related design variables based on life cycle cost using a genetic algorithm. The design variables considered in this study included the types and numbers of solar collector and auxiliary heaters; the types of storage tanks and heat exchangers; the solar collector slope; mass flow rates of the fluid on the hot and cold sides. The suggested method was applied for optimizing a solar water heating system for an elementary school in Seoul, South Korea. In addition, the effectiveness of the proposed optimization method was assessed by analyzing the obtained optimal solutions of six case studies, each of which was simulated with different solar fractions. It is observed that a trade-off between the equipment cost and the energy cost results in an optimal design that yields the lowest life cycle cost. Therefore, it could be helpful to apply the optimal solar water heating system by comparing the various design solutions obtained by using the optimization method instead of the engineer's experience and intuition.

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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Design of Heating Supply System for Facility House using Industrial Chimney Waste Heat (산업용 굴뚝 폐열을 활용한 시설하우스 난방 공급 시스템 설계)

  • Chang-Jo Lee;Jin-Gwang Koh;Sung-Keun Lee
    • The Journal of the Korea institute of electronic communication sciences
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    • v.18 no.4
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    • pp.661-668
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    • 2023
  • A large amount of fuel is required for heating the agricultural facility house, and many farmhouses are experiencing the burden of heating costs due to the recent increase in fuel prices. This paper proposes a supply system that supports heating of agricultural facility houses located nearby by utilizing industrial chimney waste heat, and analyzes the application and effect of a heating cost reduction model. The system was designed based on the chimney waste heat system, and the facility house heating cost reduction model was applied and effect analysis was performed based on the proposed model. It was confirmed that the high-temperature waste heat from the chimney can be used to supply heating to facility houses in nearby farms. If heating is supplied to large-scale facility houses near industrial complexes, it is expected to contribute to improve productivity and competitiveness of domestic farms.

Economic evaluation on heating systems of apartment complex (공동주택단지 난방시스템들에 대한 경제성 평가)

  • 조금남;윤승호;김원배
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.10 no.6
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    • pp.773-783
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    • 1998
  • The heating system for apartment complex may be classified as old systems including central system with steam boiler(S1), gas engine driven heat pump system(S2), system using waste heat(S3) and new systems including mechanical vapor re-compression system with flashing heat exchangers(S4), system using methanol(S5), system using metal hydride (S6). The purpose of the present study is to suggest optimal heating system by technically, economically and environmentally evaluating old and new heating systems of apartment complex from 500 to 3,000 households. Economic evaluation based on the technical evaluation results which estimated heat transfer area of heat exchangers and capacity of equipments was estimated initial investment cost, annual operating cost and relative payback period by considering annual increasing rates of energy cost and interest. Environmental evaluation provided annual generation rate of carbon dioxide. Initial investment cost was cheap in the order of S6, S5, S3, S2, S4, S1, annual operating cost was cheap in the order of S1, S2, S4, S5 and relative payback period was short in the order of S6, S5, S2, S3 and S4. Relative payback period was within 8 years for all scenarios of 3,000 households, and was increased as annual increasing rates of energy cost and interest were increased. As transportation pipe length was increased twice, payback period was increased by 1.4~2.6 time. The effect of temperatures of waste gas and waste water on the relative payback period was small within 0.8 years. The annual generation rate of carbon dioxide was big in the order of S4, S2 and S1. S4 was the most economic system among whole scenarios when S1 was replaced with other scenarios.

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