A decision support assessment of cogeneration plant for a community energy system in Korea

Chung, Mo; Park, Chuhwan; Lee, Suk-Gyu; Park, Hwa-Choon; Im, Yong-Hoon; Chang, Youngho

doi:10.1016/j.enpol.2012.05.002

Cited by 12 publications

(5 citation statements)

References 33 publications

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“…Then, the hourly operation of the selected devices can be simulated by matching the energy demand through adjusting the number of devices turned on. Examples of such simulations can be found in previous studies [49,50].…”

Section: Discussionmentioning

confidence: 95%

Comparison of building energy demand for hotels, hospitals, and offices in Korea

Chung

Park

2015

Energy

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Section: Discussionmentioning

confidence: 95%

Comparison of building energy demand for hotels, hospitals, and offices in Korea

Chung

Park

2015

Energy

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“…The framework developed by Chung et al [28] estimates energy load of an urban district with given hourly energy demands per floor area for each building type, then suggests a set of capacities of the district-scale generator, refrigerator, and boiler.…”

Section: 23mentioning

confidence: 99%

A framework for analyzing city-wide impact of building-integrated renewable energy

Song

2020

Applied Energy

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Recently, the integration of renewables such as photovoltaic panels, solar water heaters, ground-source heat pumps, and fuel cells into buildings is increasing.The increase of building-integrated renewables affects the energy mix, energy flows from the grid, CO2 emission, and energy system cost in cities.The urban-scale effects of increased building-integrated renewables have been investigated on a representative district (a Dong) in Seoul. Unlike the previous studies which did not consider non-solar renewables and the energy system configurations different for each building, this research considers the optimal building energy system (including ground-source heat pumps and fuel cells) for every building obtained by Linear Programming. Hourly electricity, cooling, and heating loads of each building have been estimated using the database of monthly electricity and gas usages in every building. The total capacity and energy supply of each renewable energy source, the renewable energy mix in residential and non-residential sectors, and variations in the electricity and gas flows from the grid to the district have been analyzed in detail.To carry out the investigation on a large city, the problem of long calculation time caused by a large number of buildings should be overcome. For example, the investigation on Seoul (over 10 5 buildings) may take more than two months. This research proposes a new framework for fast and accurate estimation of the total capacities and energy supply of the renewable energy sources and the variations in the energy flows from the grid in a large city (e.g. less than 2 days for Seoul). To reduce the number of optimizations, buildings with same building type, similar monthly electricity and gas usages, and similar roof area are categorized as a cluster, then a virtual representative building is generated for each cluster. Results from the optimizations for the representative buildings are linearly scaled considering the number of buildings and the total energy usage of each cluster. Consistency between the results from the proposed framework and the results from the optimization for every actual building has been validated by a case study on an aggregation of multiple districts (a Gu).Using the proposed framework, the collective effects of building-integrated renewables on a large city (Seoul) has been investigated for the first time. Two applications of the framework have been demonstrated− 1) the expected results of a future scenario of an obligation for building-integrated renewables; and 2) the variations in a total reduction in CO2 emission and the cost of a unit reduction in CO2 for varying renewable energy requirements for buildings. The framework developed by this research can be used as a reliable tool for quantitative policy design related to dissemination of building-integrated renewables.

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“…By using hot water as a heating medium, hot water provided by a boiler system circulates pipes embedded in the concrete slab in that the circulation of hot water within the Ondol system can provide radiant heating. Comparing with the conventional air heating method, the Ondol system is more environmentally sustainable and cheaper regarding the life cycle cost [23][24][25].…”

Section: Prefab Electric Ondol Systemmentioning

confidence: 99%

Thermal and Energy Performance Assessment of the Prefab Electric Ondol System for Floor Heating in a Residential Building

2020

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In South Korea, radiant floor heating has been used from old housing to the recently constructed residential buildings, which is called “Ondol”. The Ondol system is generally a water-based system and it uses hot water as a heat medium provided by boilers fueled by natural gas. With great effort to reduce greenhouse gas emissions, electric Ondol panels have been increasingly applied to the recent residential buildings for floor heating. While the prefab electric Ondol panels were developed with the demand for dry construction method, the information about the prefab electric Ondol system is not sufficient. For the present study, the thermal performance of the prefab electric Ondol panels was investigated through field measurement. In addition, the heating energy and economic performance of the electric panel were compared with the conventional Ondol system. As a result, a significant surface temperature difference was observed. Moreover, the heating cost for the prefab electric Ondol system was more expensive than the conventional system, even though a heat loss was observed by the operation of the conventional system.

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A decision support assessment of cogeneration plant for a community energy system in Korea

Cited by 12 publications

References 33 publications

Comparison of building energy demand for hotels, hospitals, and offices in Korea

Comparison of building energy demand for hotels, hospitals, and offices in Korea

A framework for analyzing city-wide impact of building-integrated renewable energy

Thermal and Energy Performance Assessment of the Prefab Electric Ondol System for Floor Heating in a Residential Building

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