Does Combined Heat and Power Play the Role of a Bridge in Energy Transition? Evidence from a Cross-Country Analysis

Kim, Hyojin; Yu, Jeong-Joon; Yoo, Seung‐Hoon

doi:10.3390/su11041035

Cited by 14 publications

(8 citation statements)

References 25 publications

(26 reference statements)

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“…The use of DH has steadily increased over the past 50 years, from 13 to 60 TWh, mainly in the residential and services sector, and by 2018~10% of Sweden's electricity production capacity comes from CHP technique [3]. Studies emphasize the role of the CHP technique in the energy transition from fossil fuel to renewable resources [18][19][20][21]. However, Werner [22] highlights a low utilization and low awareness of the benefits on a global level.…”

Section: Introductionmentioning

confidence: 99%

The Impact on System Performance When Renovating a Multifamily Building Stock in a District Heated Region

et al. 2019

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In Sweden, 90% of multifamily buildings utilize district heat and a large portion is in need of renovation. The aim is to analyze the impact of renovating a multifamily building stock in a district heating and cooling system, in terms of primary energy savings, peak power demands, electricity demand and production, and greenhouse gas emissions on local and global levels. The study analyzes scenarios regarding measures on the building envelope, ventilation, and substitution from district heat to ground source heat pump. The results indicate improved energy performance for all scenarios, ranging from 11% to 56%. Moreover, the scenarios present a reduction of fossil fuel use and reduced peak power demand in the district heating and cooling system ranging from 1 MW to 13 MW, corresponding to 4–48 W/m2 heated building area. However, the study concludes that scenarios including a ground source heat pump generate significantly higher global greenhouse gas emissions relative to scenarios including district heating. Furthermore, in a future fossil-free district heating and cooling system, a reduction in primary energy use will lead to a local reduction of emissions along with a positive effect on global greenhouse gas emissions, outperforming measures with a ground source heat pump.

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Section: Introductionmentioning

confidence: 99%

The Impact on System Performance When Renovating a Multifamily Building Stock in a District Heated Region

et al. 2019

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“…Studies emphasize the role of the CHP technique in the energy transition from fossil fuel to renewable resources [41][42][43][44]. Furthermore, considering the work of reducing GHG emissions, the potential electricity output from European CHP plants could be more than doubled [45].…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Performance and Control of a Hydronic Pavement System in a District Heating Network

et al. 2019

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A hydronic pavement system (HPS) is an alternative method to clear snow and ice, which avoids the use of salt, sand, and fossil fuel in conventional snow clearance, and minimizes the risk of accidents. The aim is to analyze the performance of different control strategies for a 35,000 m2 HPS utilizing heat from a district heating and cooling (DHC) system. The key performance indicators are (1) energy performance of the HPS, and (2) primary energy use, (3) electricity production and (4) greenhouse gas (GHG) emissions from the DHC system. The methodology uses a simulation model of the HPS and an optimization model of the DHC system. Three operational strategies are analyzed: A reference scenario based on the current control strategy, and scenarios where the HPS is shut down at temperatures below −10 °C and −5 °C. The study shows that the DHC return temperature is suitable for use. By operational strategies, use during peak demand in the DHC system can be avoided, resulting in reduced use of fossil fuel. Moreover, the energy use of the HPS could be reduced by 10% and the local GHG emissions by 25%. The study emphasizes that the HPS may have positive effects on global GHG emissions, as it enables electricity production from renewable resources.

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“…Consequently, NG acts as an eco-friendly fuel and a peak power source. Moreover, NG is expected to play the role of bridge energy as a practical means to cope with the intermittent and uncertain nature of renewable energy such as wind and solar power in an era of the energy transition [4], even though, of course, the flexible energy storage solutions are also an important "green" alternative to the solar photovoltaic and wind energy integration [5]. The share of NG generation in the total electricity generation will increase from 17.8% in 2017 to 22.4% in 2040 [6].…”

Section: Introductionmentioning

confidence: 99%

Optimal Share of Natural Gas in the Electric Power Generation of South Korea: A Note

Kim

Yoo

2019

Sustainability

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Natural gas (NG) not only emits fewer greenhouse gases and air pollutants than coal but also plays the role of a peak power source that can respond immediately to the variability of increasing renewables. Although the share of NG generation worldwide is increasing, it is difficult for South Korea to increase its NG generation significantly in terms of fuel supply security, since it depends on imports for all of the NG used for power generation. Therefore, the optimal share of NG generation in electric power generation is a serious concern. This note attempts to estimate the optimal share by modelling the plausible relationship between NG generation and national output in the Cobb–Douglas production function setting and then deriving the output-maximizing share of NG generation. The production function is statistically significantly estimated using annual data from 1990 to 2016, allowing for the first-order serial correlation. The optimal share is computed to be 20.3%. Therefore, it is recommended that South Korea increases the share of NG generation slightly and makes efforts to secure a stable NG supply, given that, according to the national plan, the share will be 18.8% in 2030.

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Does Combined Heat and Power Play the Role of a Bridge in Energy Transition? Evidence from a Cross-Country Analysis

Cited by 14 publications

References 25 publications

The Impact on System Performance When Renovating a Multifamily Building Stock in a District Heated Region

The Impact on System Performance When Renovating a Multifamily Building Stock in a District Heated Region

Analyzing the Performance and Control of a Hydronic Pavement System in a District Heating Network

Optimal Share of Natural Gas in the Electric Power Generation of South Korea: A Note

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