Regional energy system optimization – Potential for a regional heat market

Karlsson, Magnus; Gebremedhin, Alemayehu; Klugman, Sofia; Henning, Dag; Moshfegh, Bahram

doi:10.1016/j.apenergy.2008.09.012

Cited by 48 publications

(25 citation statements)

References 15 publications

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“…This approach is also supported by the fact that electricity pricing in the Nordic electricity markets is based on the production costs of a marginal unit. The same approach has been used in many previous studies [7,11,18]. Coal-based condensing power is marginal in the Nordic electricity market most of the time, and therefore it is used as a form of marginal electricity production in this study.…”

Section: Evaluation Of Changes In Primary Energy Consumption and Co 2mentioning

confidence: 99%

“…The importance of clearly defining the system boundary has been noted in some industry related energy efficiency studies, such as Larsson et al [15] and Tanaka [16]. In addition, wider system boundaries have been used when the integration of industrial energy production into the district heating system of outside society has been studied in Sweden [17,18]. These studies have focused on evaluating the increase in energy efficiency and the reduction in CO 2 emissions in integrated systems.…”

Section: Introductionmentioning

confidence: 99%

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Implications of process energy efficiency improvements for primary energy consumption and CO2 emissions at the national level

Siitonen¹,

Tuomaala²,

Suominen

et al. 2010

Applied Energy

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Section: Evaluation Of Changes In Primary Energy Consumption and Co 2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Implications of process energy efficiency improvements for primary energy consumption and CO2 emissions at the national level

Siitonen¹,

Tuomaala²,

Suominen

et al. 2010

Applied Energy

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“…The heat demand for T2 (winter) and T3 (summer) is, based on T1 (autumn/spring) demand, recalculated using seasonal data trends from the regional heat market study [44]. In other words, the summer heat load is lower, and the winter heat load is higher than the autumn/spring load; this assumption follows the heat load data in the regional heat market study [44]. The cooling demand for winter and summer is calculated using the same factors, but on the contrary.…”

Section: Figurementioning

confidence: 99%

Industrial excess heat use: Systems analysis and CO2 emissions reduction

Viklund¹,

Karlsson²

2015

Applied Energy

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The adopted energy efficiency directive stresses the use of excess heat as a way to reach the EU target of primary energy use. Use of industrial excess heat may result in decreased energy demand, CO2 emissions reduction, and economic gains. In this study, an energy systems analysis is performed with the aim of investigating how excess heat should be used, and the impact on CO2 emissions. The manner in which the heat is recovered will affect the system. The influence of excess heat recovery and the trade-off between heat recovery for heating or cooling applications and electricity production has been investigated using the energy systems modeling tool reMIND. The model has been optimized by minimizing the system cost. The results show that it is favorable to recover the available excess heat in all the investigated energy market scenarios, and that heat driven electricity production is not a part of the optimal solution. The trade-off between use of recovered excess heat in the heating or cooling system depends on the energy market prices and the type of heat production. The introduction of excess heat reduces the CO2 emissions in the system for all the studied energy market scenarios.

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“…Connecting several DH systems may also offer advantages of scale, such as more cost-effective electricity and heat production (Sandvall et al, 2015). Sandvall et al (2015) and Karlsson et al (2009) studied the integration of several local DH systems and an industrial companies in Sweden and concluded that such setups may reduce both primary energy use and CO 2 emissions (Sandvall et al, 2015;Karlsson et al, 2009) Sweden is not the only country using excess heat in DH systems. The concept is used both in Europe and elsewhere, although often on a smaller scale (Rezaie and Rosen, 2012;Persson and Werner, 2012).…”

Section: Excess Heat Use Opportunitiesmentioning

confidence: 99%

System studies of the use of industrial excess heat

Viklund¹

2015

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Energy, materials, and by-products, can be exchanged between companies, having positive effects in the form of improved resource efficiency, environmental benefits, and economic gains. One such energy stream that can be exchanged is excess heat, that is, heat generated as a by-product during, for example, industrial production. Excess heat will continue to play an important role in efforts to reduce greenhouse gas (GHG) emissions and improve energy efficiency. Using excess heat is therefore currently emphasized in EU policy as a way to reach EU climate targets.This thesis examines the opportunities of manufacturing industries to use industrial excess heat, and how doing so can positively affect industry, society, and the climate. Since different parts of the energy system are entangled, there is an inherent complexity in studying these systems and introducing excess heat in one part of the energy system may influence other parts of the system. This analysis has accordingly been conducted by combining studies from various perspectives, by applying both quantitative and qualitative methods and covering a broad range of aspects, such as technical possibilities as well as climate, policy, economics, and resource aspects.The results identify several opportunities and benefits accruing from excess heat use. Although excess heat is currently partly used as a thermal resource in district heating in Sweden, this thesis demonstrates that significant untapped excess heat is still available. The mapping conducted in the appended studies identifies excess heat in different energy carriers, mainly low-temperature water. Analysis of excess heat use in different recovery options demonstrated greater output when using excess heat in district heating than electricity production. Optimizing the trade-offs in excess heat used in a district heating network, heatdriven cooling, and electricity production under different energy market conditions while minimizing the system cost, however, indicated that the attractiveness of excess heat in district heating depends on the type of heat production in the system. Viewing excess heat as a low-cost energy source also makes it economically interesting, and creates opportunities to invest in excess heat-recovery solutions. Excess heat is often viewed as CO 2 neutral since unused excess heat may be regarded as wasted energy. The GHG mitigation potential of using excess heat, however, was found to be ambiguous. The appended studies demonstrate that using excess heat for electricity production or for applications that reduce the use of electricity reduces GHG emissions. The effects of using excess heat in district heating, on the vi other hand, depend on the energy market development, for example, the marginal electricity production and marginal use of biomass, and on the type of district heating system replaced. The interviews performed reveal that energy policy does influence excess heat use, being demonstrated both to promote and discourage excess heat use. Beyond national energy polic...

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Regional energy system optimization – Potential for a regional heat market

Cited by 48 publications

References 15 publications

Implications of process energy efficiency improvements for primary energy consumption and CO2 emissions at the national level

Implications of process energy efficiency improvements for primary energy consumption and CO2 emissions at the national level

Industrial excess heat use: Systems analysis and CO2 emissions reduction

System studies of the use of industrial excess heat

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